Resolve dependencies against published threshold sdk v0.1.0

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

.github/pull_request_template.md

@@ -0,0 +1,11 @@
+## PCI review checklist
+
+<!-- heimdall_github_prtemplate:grc-pci_dss-2024-01-05 -->
+
+- [ ] I have documented a clear reason for, and description of, the change I am making.
+
+- [ ] If applicable, I've documented a plan to revert these changes if they require more than reverting the pull request.
+
+- [ ] If applicable, I've documented the impact of any changes to security controls.
+
+  Examples of changes to security controls include using new access control methods, adding or removing logging pipelines, etc.

.github/workflows/test.yml

@@ -4,6 +4,8 @@ on:
   - workflow_dispatch
   - push
 
+permissions: read-all
+
 jobs:
   test:
     runs-on: ubuntu-latest

.gitignore

@@ -8,3 +8,8 @@ plan.tfplan
 # IntelliJ IDEA project files
 .idea
 *.iprg
+
+.DS_Store
+
+.env
+.envrc

CODEOWNERS

@@ -1,5 +1,4 @@
 # These owners will be the default owners for everything in
 # the repo, unless a later match takes precedence.
 
-@hashicorp/boundary
-
+* @hashicorp/boundary

LICENSE

@@ -1,4 +1,4 @@
-Copyright (c) 2021 HashiCorp, Inc.
+Copyright IBM Corp. 2021, 2026
 
 Mozilla Public License Version 2.0
 ==================================

NOTICE

@@ -0,0 +1,9 @@
+This repository is a community fork of hashicorp/boundary-plugin-aws
+(https://github.com/hashicorp/boundary-plugin-aws), maintained for Threshold.
+
+The original work is licensed under the Mozilla Public License 2.0 (see LICENSE).
+Original copyright IBM Corp. / HashiCorp, Inc. is retained in all source file
+headers and in LICENSE. Modifications are limited to the Go module path and the
+import paths of the Boundary SDK/API packages.
+
+This fork is not affiliated with, endorsed by, or supported by HashiCorp or IBM.

README.md

@@ -1,3 +1,12 @@
+## About this fork
+
+This is a community fork of
+[hashicorp/boundary-plugin-aws](https://github.com/hashicorp/boundary-plugin-aws)
+for use with Threshold. It is licensed under the MPL-2.0 (see `LICENSE`), and
+the original copyright notices are retained. It is not affiliated with,
+endorsed by, or supported by HashiCorp or IBM. Changes from upstream are limited
+to the Go module path and SDK import paths; see `NOTICE`.
+
 # AWS Plugin for HashiCorp Boundary
 
 This repo contains the aws plugin for [HashiCorp
@@ -25,6 +34,8 @@ Credential rotation can be turned off by setting the
 This plugin will attempt to assume a role when a `role_arn` is supplied through the
 `attributes` object. More information about assume an AWS role can be found [here](https://docs.aws.amazon.com/STS/latest/APIReference/API_AssumeRole.html). This feature only works when the plugin is running on a self managed Boundary [worker](https://developer.hashicorp.com/boundary/tutorials/hcp-administration/hcp-manage-workers).
 
+To discover hosts across multiple AWS accounts, supply a `target_role_arn` in addition to `role_arn`. The plugin uses the principal credentials to assume the target role via a two-hop `AssumeRole` chain, enabling cross-account host discovery from a single worker. See [Attributes and Secrets](plugin/service/host/README.md#attributes-and-secrets) for the full list of `target_*` attributes.
+
 ### Environment Credentials
 
 This plugin will attempt to retrieve credentials from environment variables. More

go.mod

@@ -1,66 +1,69 @@
-module github.com/hashicorp/boundary-plugin-aws
+module repo.anhonesthost.net/CyberCoveLLC/threshold-plugin-aws
 
-go 1.21
+go 1.26.9
 
 require (
-	github.com/aws/aws-sdk-go-v2 v1.32.2
-	github.com/aws/aws-sdk-go-v2/service/ec2 v1.186.0
-	github.com/aws/aws-sdk-go-v2/service/iam v1.37.2
-	github.com/aws/aws-sdk-go-v2/service/s3 v1.66.1
-	github.com/aws/aws-sdk-go-v2/service/sts v1.32.2
-	github.com/aws/smithy-go v1.22.0
-	github.com/google/go-cmp v0.6.0
-	github.com/google/uuid v1.4.0
-	github.com/hashicorp/boundary/sdk v0.0.43-0.20240717182311-a20aae98794a
+	github.com/aws/aws-sdk-go-v2 v1.41.7
+	github.com/aws/aws-sdk-go-v2/credentials v1.17.46
+	github.com/aws/aws-sdk-go-v2/service/ec2 v1.254.0
+	github.com/aws/aws-sdk-go-v2/service/iam v1.47.6
+	github.com/aws/aws-sdk-go-v2/service/s3 v1.101.0
+	github.com/aws/aws-sdk-go-v2/service/sts v1.38.5
+	github.com/aws/smithy-go v1.25.1
+	github.com/google/go-cmp v0.7.0
+	github.com/google/uuid v1.6.0
 	github.com/hashicorp/go-multierror v1.1.1
-	github.com/hashicorp/go-secure-stdlib/awsutil/v2 v2.0.0
-	github.com/hashicorp/terraform-json v0.14.0
+	github.com/hashicorp/go-secure-stdlib/awsutil/v2 v2.1.3
+	github.com/hashicorp/go-secure-stdlib/parseutil v0.2.0
+	github.com/hashicorp/terraform-json v0.23.0
 	github.com/mitchellh/mapstructure v1.5.0
-	github.com/stretchr/testify v1.8.4
-	google.golang.org/grpc v1.61.0
-	google.golang.org/protobuf v1.35.1
+	github.com/stretchr/testify v1.11.1
+	google.golang.org/grpc v1.85.0-dev.0.20260825072537-93e31b48545e
+	google.golang.org/protobuf v1.36.12
+	repo.anhonesthost.net/CyberCoveLLC/threshold/sdk v0.1.0
 )
 
 require (
-	github.com/aws/aws-sdk-go-v2/aws/protocol/eventstream v1.6.6 // indirect
-	github.com/aws/aws-sdk-go-v2/config v1.18.33 // indirect
-	github.com/aws/aws-sdk-go-v2/credentials v1.13.32 // indirect
-	github.com/aws/aws-sdk-go-v2/feature/ec2/imds v1.13.8 // indirect
-	github.com/aws/aws-sdk-go-v2/internal/configsources v1.3.21 // indirect
-	github.com/aws/aws-sdk-go-v2/internal/endpoints/v2 v2.6.21 // indirect
-	github.com/aws/aws-sdk-go-v2/internal/ini v1.3.39 // indirect
-	github.com/aws/aws-sdk-go-v2/internal/v4a v1.3.21 // indirect
-	github.com/aws/aws-sdk-go-v2/service/internal/accept-encoding v1.12.0 // indirect
-	github.com/aws/aws-sdk-go-v2/service/internal/checksum v1.4.2 // indirect
-	github.com/aws/aws-sdk-go-v2/service/internal/presigned-url v1.12.2 // indirect
-	github.com/aws/aws-sdk-go-v2/service/internal/s3shared v1.18.2 // indirect
-	github.com/aws/aws-sdk-go-v2/service/sso v1.13.2 // indirect
-	github.com/aws/aws-sdk-go-v2/service/ssooidc v1.15.2 // indirect
+	github.com/apparentlymart/go-textseg/v15 v15.0.0 // indirect
+	github.com/aws/aws-sdk-go-v2/aws/protocol/eventstream v1.7.10 // indirect
+	github.com/aws/aws-sdk-go-v2/config v1.28.5 // indirect
+	github.com/aws/aws-sdk-go-v2/feature/ec2/imds v1.16.20 // indirect
+	github.com/aws/aws-sdk-go-v2/internal/configsources v1.4.23 // indirect
+	github.com/aws/aws-sdk-go-v2/internal/endpoints/v2 v2.7.23 // indirect
+	github.com/aws/aws-sdk-go-v2/internal/ini v1.8.1 // indirect
+	github.com/aws/aws-sdk-go-v2/internal/v4a v1.4.24 // indirect
+	github.com/aws/aws-sdk-go-v2/service/internal/accept-encoding v1.13.9 // indirect
+	github.com/aws/aws-sdk-go-v2/service/internal/checksum v1.9.15 // indirect
+	github.com/aws/aws-sdk-go-v2/service/internal/presigned-url v1.13.23 // indirect
+	github.com/aws/aws-sdk-go-v2/service/internal/s3shared v1.19.23 // indirect
+	github.com/aws/aws-sdk-go-v2/service/sso v1.24.6 // indirect
+	github.com/aws/aws-sdk-go-v2/service/ssooidc v1.28.5 // indirect
 	github.com/davecgh/go-spew v1.1.1 // indirect
-	github.com/fatih/color v1.15.0 // indirect
-	github.com/golang/protobuf v1.5.3 // indirect
+	github.com/fatih/color v1.18.0 // indirect
 	github.com/hashicorp/errwrap v1.1.0 // indirect
-	github.com/hashicorp/eventlogger v0.2.6-0.20231025104552-802587e608f0 // indirect
+	github.com/hashicorp/eventlogger v0.2.11 // indirect
 	github.com/hashicorp/eventlogger/filters/encrypt v0.1.8-0.20231025104552-802587e608f0 // indirect
 	github.com/hashicorp/go-cleanhttp v0.5.2 // indirect
-	github.com/hashicorp/go-hclog v1.5.0 // indirect
-	github.com/hashicorp/go-kms-wrapping/v2 v2.0.14 // indirect
+	github.com/hashicorp/go-hclog v1.6.3 // indirect
+	github.com/hashicorp/go-kms-wrapping/v2 v2.0.20 // indirect
+	github.com/hashicorp/go-secure-stdlib/strutil v0.1.2 // indirect
+	github.com/hashicorp/go-sockaddr v1.0.7 // indirect
 	github.com/hashicorp/go-uuid v1.0.3 // indirect
-	github.com/hashicorp/go-version v1.5.0 // indirect
-	github.com/jmespath/go-jmespath v0.4.0 // indirect
-	github.com/mattn/go-colorable v0.1.13 // indirect
-	github.com/mattn/go-isatty v0.0.19 // indirect
+	github.com/hashicorp/go-version v1.7.0 // indirect
+	github.com/kr/text v0.2.0 // indirect
+	github.com/mattn/go-colorable v0.1.14 // indirect
+	github.com/mattn/go-isatty v0.0.20 // indirect
 	github.com/mitchellh/copystructure v1.2.0 // indirect
 	github.com/mitchellh/pointerstructure v1.2.1 // indirect
 	github.com/mitchellh/reflectwalk v1.0.2 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
-	github.com/zclconf/go-cty v1.10.0 // indirect
-	golang.org/x/crypto v0.28.0 // indirect
-	golang.org/x/net v0.30.0 // indirect
-	golang.org/x/sys v0.26.0 // indirect
-	golang.org/x/text v0.19.0 // indirect
-	google.golang.org/genproto v0.0.0-20240116215550-a9fa1716bcac // indirect
-	google.golang.org/genproto/googleapis/api v0.0.0-20240125205218-1f4bbc51befe // indirect
-	google.golang.org/genproto/googleapis/rpc v0.0.0-20240125205218-1f4bbc51befe // indirect
+	github.com/ryanuber/go-glob v1.0.0 // indirect
+	github.com/zclconf/go-cty v1.15.0 // indirect
+	golang.org/x/crypto v0.57.0 // indirect
+	golang.org/x/net v0.60.0 // indirect
+	golang.org/x/sys v0.48.0 // indirect
+	golang.org/x/text v0.42.0 // indirect
+	google.golang.org/genproto/googleapis/api v0.0.0-20260817212433-ac3dfec99bb1 // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20260817212433-ac3dfec99bb1 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 )

go.sum

@@ -4,56 +4,50 @@ github.com/Masterminds/semver/v3 v3.2.0 h1:3MEsd0SM6jqZojhjLWWeBY+Kcjy9i6MQAeY7Y
 github.com/Masterminds/semver/v3 v3.2.0/go.mod h1:qvl/7zhW3nngYb5+80sSMF+FG2BjYrf8m9wsX0PNOMQ=
 github.com/Masterminds/sprig/v3 v3.2.3 h1:eL2fZNezLomi0uOLqjQoN6BfsDD+fyLtgbJMAj9n6YA=
 github.com/Masterminds/sprig/v3 v3.2.3/go.mod h1:rXcFaZ2zZbLRJv/xSysmlgIM1u11eBaRMhvYXJNkGuM=
-github.com/apparentlymart/go-textseg v1.0.0/go.mod h1:z96Txxhf3xSFMPmb5X/1W05FF/Nj9VFpLOpjS5yuumk=
-github.com/apparentlymart/go-textseg/v13 v13.0.0/go.mod h1:ZK2fH7c4NqDTLtiYLvIkEghdlcqw7yxLeM89kiTRPUo=
+github.com/apparentlymart/go-textseg/v15 v15.0.0 h1:uYvfpb3DyLSCGWnctWKGj857c6ew1u1fNQOlOtuGxQY=
+github.com/apparentlymart/go-textseg/v15 v15.0.0/go.mod h1:K8XmNZdhEBkdlyDdvbmmsvpAG721bKi0joRfFdHIWJ4=
 github.com/armon/go-radix v1.0.0 h1:F4z6KzEeeQIMeLFa97iZU6vupzoecKdU5TX24SNppXI=
 github.com/armon/go-radix v1.0.0/go.mod h1:ufUuZ+zHj4x4TnLV4JWEpy2hxWSpsRywHrMgIH9cCH8=
-github.com/aws/aws-sdk-go-v2 v1.20.1/go.mod h1:NU06lETsFm8fUC6ZjhgDpVBcGZTFQ6XM+LZWZxMI4ac=
-github.com/aws/aws-sdk-go-v2 v1.32.2 h1:AkNLZEyYMLnx/Q/mSKkcMqwNFXMAvFto9bNsHqcTduI=
-github.com/aws/aws-sdk-go-v2 v1.32.2/go.mod h1:2SK5n0a2karNTv5tbP1SjsX0uhttou00v/HpXKM1ZUo=
-github.com/aws/aws-sdk-go-v2/aws/protocol/eventstream v1.6.6 h1:pT3hpW0cOHRJx8Y0DfJUEQuqPild8jRGmSFmBgvydr0=
-github.com/aws/aws-sdk-go-v2/aws/protocol/eventstream v1.6.6/go.mod h1:j/I2++U0xX+cr44QjHay4Cvxj6FUbnxrgmqN3H1jTZA=
-github.com/aws/aws-sdk-go-v2/config v1.18.33 h1:JKcw5SFxFW/rpM4mOPjv0VQ11E2kxW13F3exWOy7VZU=
-github.com/aws/aws-sdk-go-v2/config v1.18.33/go.mod h1:hXO/l9pgY3K5oZJldamP0pbZHdPqqk+4/maa7DSD3cA=
-github.com/aws/aws-sdk-go-v2/credentials v1.13.32 h1:lIH1eKPcCY1ylR4B6PkBGRWMHO3aVenOKJHWiS4/G2w=
-github.com/aws/aws-sdk-go-v2/credentials v1.13.32/go.mod h1:lL8U3v/Y79YRG69WlAho0OHIKUXCyFvSXaIvfo81sls=
-github.com/aws/aws-sdk-go-v2/feature/ec2/imds v1.13.8 h1:DK/9C+UN/X+1+Wm8pqaDksQr2tSLzq+8X1/rI/ZxKEQ=
-github.com/aws/aws-sdk-go-v2/feature/ec2/imds v1.13.8/go.mod h1:ce7BgLQfYr5hQFdy67oX2svto3ufGtm6oBvmsHScI1Q=
-github.com/aws/aws-sdk-go-v2/internal/configsources v1.1.38/go.mod h1:qggunOChCMu9ZF/UkAfhTz25+U2rLVb3ya0Ua6TTfCA=
-github.com/aws/aws-sdk-go-v2/internal/configsources v1.3.21 h1:UAsR3xA31QGf79WzpG/ixT9FZvQlh5HY1NRqSHBNOCk=
-github.com/aws/aws-sdk-go-v2/internal/configsources v1.3.21/go.mod h1:JNr43NFf5L9YaG3eKTm7HQzls9J+A9YYcGI5Quh1r2Y=
-github.com/aws/aws-sdk-go-v2/internal/endpoints/v2 v2.4.32/go.mod h1:0ZXSqrty4FtQ7p8TEuRde/SZm9X05KT18LAUlR40Ln0=
-github.com/aws/aws-sdk-go-v2/internal/endpoints/v2 v2.6.21 h1:6jZVETqmYCadGFvrYEQfC5fAQmlo80CeL5psbno6r0s=
-github.com/aws/aws-sdk-go-v2/internal/endpoints/v2 v2.6.21/go.mod h1:1SR0GbLlnN3QUmYaflZNiH1ql+1qrSiB2vwcJ+4UM60=
-github.com/aws/aws-sdk-go-v2/internal/ini v1.3.39 h1:fc0ukRAiP1syoSGZYu+DaE+FulSYhTiJ8WpVu5jElU4=
-github.com/aws/aws-sdk-go-v2/internal/ini v1.3.39/go.mod h1:WLAW8PT7+JhjZfLSWe7WEJaJu0GNo0cKc2Zyo003RBs=
-github.com/aws/aws-sdk-go-v2/internal/v4a v1.3.21 h1:7edmS3VOBDhK00b/MwGtGglCm7hhwNYnjJs/PgFdMQE=
-github.com/aws/aws-sdk-go-v2/internal/v4a v1.3.21/go.mod h1:Q9o5h4HoIWG8XfzxqiuK/CGUbepCJ8uTlaE3bAbxytQ=
-github.com/aws/aws-sdk-go-v2/service/ec2 v1.186.0 h1:n2l2WeV+lEABrGwG/4MsE0WFEbd3j7yKsmZzbnEm5CY=
-github.com/aws/aws-sdk-go-v2/service/ec2 v1.186.0/go.mod h1:kYXaB4FzyhEJjvrJ84oPnMElLiEAjGxxUunVW2tBSng=
-github.com/aws/aws-sdk-go-v2/service/iam v1.37.2 h1:E7vCDUFeDN8uOk8Nb2d4E1howWS1TR4HrKABXsvttIs=
-github.com/aws/aws-sdk-go-v2/service/iam v1.37.2/go.mod h1:QzMecFrIFYJ1cyxjlUoIFRzYSDX19gdqYUd0Tyws2J8=
-github.com/aws/aws-sdk-go-v2/service/internal/accept-encoding v1.12.0 h1:TToQNkvGguu209puTojY/ozlqy2d/SFNcoLIqTFi42g=
-github.com/aws/aws-sdk-go-v2/service/internal/accept-encoding v1.12.0/go.mod h1:0jp+ltwkf+SwG2fm/PKo8t4y8pJSgOCO4D8Lz3k0aHQ=
-github.com/aws/aws-sdk-go-v2/service/internal/checksum v1.4.2 h1:4FMHqLfk0efmTqhXVRL5xYRqlEBNBiRI7N6w4jsEdd4=
-github.com/aws/aws-sdk-go-v2/service/internal/checksum v1.4.2/go.mod h1:LWoqeWlK9OZeJxsROW2RqrSPvQHKTpp69r/iDjwsSaw=
-github.com/aws/aws-sdk-go-v2/service/internal/presigned-url v1.9.32/go.mod h1:4jwAWKEkCR0anWk5+1RbfSg1R5Gzld7NLiuaq5bTR/Y=
-github.com/aws/aws-sdk-go-v2/service/internal/presigned-url v1.12.2 h1:s7NA1SOw8q/5c0wr8477yOPp0z+uBaXBnLE0XYb0POA=
-github.com/aws/aws-sdk-go-v2/service/internal/presigned-url v1.12.2/go.mod h1:fnjjWyAW/Pj5HYOxl9LJqWtEwS7W2qgcRLWP+uWbss0=
-github.com/aws/aws-sdk-go-v2/service/internal/s3shared v1.18.2 h1:t7iUP9+4wdc5lt3E41huP+GvQZJD38WLsgVp4iOtAjg=
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-github.com/aws/aws-sdk-go-v2/service/s3 v1.66.1 h1:MkQ4unegQEStiQYmfFj+Aq5uTp265ncSmm0XTQwDwi0=
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-github.com/aws/aws-sdk-go-v2/service/sso v1.13.2/go.mod h1:ju+nNXUunfIFamXUIZQiICjnO/TPlOmWcYhZcSy7xaE=
-github.com/aws/aws-sdk-go-v2/service/ssooidc v1.15.2 h1:OJELEgyaT2kmaBGZ+myyZbTTLobfe3ox3FSh5eYK9Qs=
-github.com/aws/aws-sdk-go-v2/service/ssooidc v1.15.2/go.mod h1:ubDBBaDFs1GHijSOTi8ljppML15GLG0HxhILtbjNNYQ=
-github.com/aws/aws-sdk-go-v2/service/sts v1.21.2/go.mod h1:FQ/DQcOfESELfJi5ED+IPPAjI5xC6nxtSolVVB773jM=
-github.com/aws/aws-sdk-go-v2/service/sts v1.32.2 h1:CiS7i0+FUe+/YY1GvIBLLrR/XNGZ4CtM1Ll0XavNuVo=
-github.com/aws/aws-sdk-go-v2/service/sts v1.32.2/go.mod h1:HtaiBI8CjYoNVde8arShXb94UbQQi9L4EMr6D+xGBwo=
-github.com/aws/smithy-go v1.14.1/go.mod h1:Tg+OJXh4MB2R/uN61Ko2f6hTZwB/ZYGOtib8J3gBHzA=
-github.com/aws/smithy-go v1.22.0 h1:uunKnWlcoL3zO7q+gG2Pk53joueEOsnNB28QdMsmiMM=
-github.com/aws/smithy-go v1.22.0/go.mod h1:irrKGvNn1InZwb2d7fkIRNucdfwR8R+Ts3wxYa/cJHg=
+github.com/aws/aws-sdk-go-v2 v1.41.7 h1:DWpAJt66FmnnaRIOT/8ASTucrvuDPZASqhhLey6tLY8=
+github.com/aws/aws-sdk-go-v2 v1.41.7/go.mod h1:4LAfZOPHNVNQEckOACQx60Y8pSRjIkNZQz1w92xpMJc=
+github.com/aws/aws-sdk-go-v2/aws/protocol/eventstream v1.7.10 h1:gx1AwW1Iyk9Z9dD9F4akX5gnN3QZwUB20GGKH/I+Rho=
+github.com/aws/aws-sdk-go-v2/aws/protocol/eventstream v1.7.10/go.mod h1:qqY157uZoqm5OXq/amuaBJyC9hgBCBQnsaWnPe905GY=
+github.com/aws/aws-sdk-go-v2/config v1.28.5 h1:Za41twdCXbuyyWv9LndXxZZv3QhTG1DinqlFsSuvtI0=
+github.com/aws/aws-sdk-go-v2/config v1.28.5/go.mod h1:4VsPbHP8JdcdUDmbTVgNL/8w9SqOkM5jyY8ljIxLO3o=
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internal/credential/attributes.go

@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2021, 2026
 // SPDX-License-Identifier: MPL-2.0
 
 package credential
@@ -6,8 +6,8 @@ package credential
 import (
 	"fmt"
 
-	"github.com/hashicorp/boundary-plugin-aws/internal/errors"
-	"github.com/hashicorp/boundary-plugin-aws/internal/values"
+	"repo.anhonesthost.net/CyberCoveLLC/threshold-plugin-aws/internal/errors"
+	"repo.anhonesthost.net/CyberCoveLLC/threshold-plugin-aws/internal/values"
 	"github.com/hashicorp/go-secure-stdlib/awsutil/v2"
 	"google.golang.org/protobuf/types/known/structpb"
 )
@@ -186,3 +186,63 @@ func GetCredentialAttributes(in *structpb.Struct) (*CredentialAttributes, error)
 		RoleTags:                  roleTags,
 	}, nil
 }
+
+// GetTargetCredentialAttributes parses values out of a protobuf struct input and returns a CredentialAttributes used
+// for configuring a second AWS session. target_role_arn is required when parsing target credentials.
+// A status error is returned with an InvalidArgument code when target account attributes are missing
+// required values or have invalid value types.
+func GetTargetCredentialAttributes(in *structpb.Struct) (*CredentialAttributes, error) {
+	badFields := make(map[string]string)
+
+	// Parse the role ARN of the target account to AssumeRole into.
+	targetRoleArn, err := values.GetStringValue(in, ConstTargetRoleArn, true)
+	if err != nil {
+		badFields[fmt.Sprintf("attributes.%s", ConstTargetRoleArn)] = err.Error()
+	}
+
+	// try parsing target_region, fallback to region, adds target_region to bad fields only when malformed since not required
+	targetRegion, err := values.GetStringValue(in, ConstTargetRegion, false)
+	if err != nil {
+		badFields[fmt.Sprintf("attributes.%s", ConstTargetRegion)] = err.Error()
+	}
+	if targetRegion == "" {
+		targetRegion, err = values.GetStringValue(in, ConstRegion, true) // region is required for processing
+		if err != nil {
+			badFields[fmt.Sprintf("attributes.%s", ConstRegion)] = err.Error()
+		}
+	}
+
+	// the remaining fields are optional and only raise errors when malformed
+	disableCredentialRotation, err := values.GetBoolValue(in, ConstDisableCredentialRotation, false)
+	if err != nil {
+		badFields[fmt.Sprintf("attributes.%s", ConstDisableCredentialRotation)] = err.Error()
+	}
+
+	targetRoleExternalId, err := values.GetStringValue(in, ConstTargetRoleExternalId, false)
+	if err != nil {
+		badFields[fmt.Sprintf("attributes.%s", ConstTargetRoleExternalId)] = err.Error()
+	}
+
+	targetRoleSessionName, err := values.GetStringValue(in, ConstTargetRoleSessionName, false)
+	if err != nil {
+		badFields[fmt.Sprintf("attributes.%s", ConstTargetRoleSessionName)] = err.Error()
+	}
+
+	targetRoleTags, err := values.GetMapStringString(in, ConstTargetRoleTags, false)
+	if err != nil {
+		badFields[fmt.Sprintf("attributes.%s", ConstTargetRoleTags)] = err.Error()
+	}
+
+	if len(badFields) > 0 {
+		return nil, errors.InvalidArgumentError("Error in the attributes provided", badFields)
+	}
+
+	return &CredentialAttributes{
+		Region:                    targetRegion,
+		DisableCredentialRotation: disableCredentialRotation,
+		RoleArn:                   targetRoleArn,
+		RoleExternalId:            targetRoleExternalId,
+		RoleSessionName:           targetRoleSessionName,
+		RoleTags:                  targetRoleTags,
+	}, nil
+}

internal/credential/attributes_test.go

@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2021, 2026
 // SPDX-License-Identifier: MPL-2.0
 
 package credential
@@ -101,6 +101,232 @@ func TestGetCredentialAttributes(t *testing.T) {
 	}
 }
 
+func TestGetTargetCredentialAttributes(t *testing.T) {
+	const targetRoleArn = "arn:aws:iam::222222222222:role/Target"
+
+	cases := []struct {
+		name                string
+		in                  map[string]any
+		expected            *CredentialAttributes
+		expectedErrContains string
+	}{
+		{
+			name: "missing target_role_arn",
+			in: map[string]any{
+				ConstRegion: "us-west-2",
+			},
+			expectedErrContains: "attributes.target_role_arn: missing required value \"target_role_arn\"",
+		},
+		{
+			name:                "missing target_role_arn and region",
+			in:                  map[string]any{},
+			expectedErrContains: "attributes.target_role_arn: missing required value \"target_role_arn\"",
+		},
+		{
+			name: "empty target_role_arn",
+			in: map[string]any{
+				ConstRegion:        "us-west-2",
+				ConstTargetRoleArn: "",
+			},
+			expectedErrContains: "attributes.target_role_arn: value \"target_role_arn\" cannot be empty",
+		},
+		{
+			name: "wrong type target_role_arn",
+			in: map[string]any{
+				ConstRegion:        "us-west-2",
+				ConstTargetRoleArn: true,
+			},
+			expectedErrContains: "attributes.target_role_arn: unexpected type for value \"target_role_arn\": want string, got bool",
+		},
+		{
+			name: "target_region without target_role_arn",
+			in: map[string]any{
+				ConstRegion:       "us-west-2",
+				ConstTargetRegion: "eu-west-1",
+			},
+			expectedErrContains: "attributes.target_role_arn: missing required value \"target_role_arn\"",
+		},
+		{
+			name: "other target fields without target_role_arn",
+			in: map[string]any{
+				ConstRegion:                "us-west-2",
+				ConstTargetRoleExternalId:  "ext",
+				ConstTargetRoleSessionName: "sess",
+				ConstTargetRoleTags:        map[string]any{"k": "v"},
+			},
+			expectedErrContains: "attributes.target_role_arn: missing required value \"target_role_arn\"",
+		},
+		{
+			name: "target_role_arn uses region when target_region omitted",
+			in: map[string]any{
+				ConstRegion:        "us-west-2",
+				ConstTargetRoleArn: targetRoleArn,
+			},
+			expected: &CredentialAttributes{
+				Region:  "us-west-2",
+				RoleArn: targetRoleArn,
+			},
+		},
+		{
+			name: "target_role_arn without target_region or region",
+			in: map[string]any{
+				ConstTargetRoleArn: targetRoleArn,
+			},
+			expectedErrContains: "missing required value \"region\"",
+		},
+		{
+			name: "target_region overrides region",
+			in: map[string]any{
+				ConstRegion:        "us-west-2",
+				ConstTargetRegion:  "eu-west-1",
+				ConstTargetRoleArn: targetRoleArn,
+			},
+			expected: &CredentialAttributes{
+				Region:  "eu-west-1",
+				RoleArn: targetRoleArn,
+			},
+		},
+		{
+			name: "empty target_region falls back to region",
+			in: map[string]any{
+				ConstRegion:        "us-west-2",
+				ConstTargetRegion:  "",
+				ConstTargetRoleArn: targetRoleArn,
+			},
+			expected: &CredentialAttributes{
+				Region:  "us-west-2",
+				RoleArn: targetRoleArn,
+			},
+		},
+		{
+			name: "all optional target fields",
+			in: map[string]any{
+				ConstRegion:                    "us-west-2",
+				ConstDisableCredentialRotation: true,
+				ConstTargetRoleArn:             targetRoleArn,
+				ConstTargetRegion:              "eu-west-1",
+				ConstTargetRoleExternalId:      "target-ext",
+				ConstTargetRoleSessionName:     "target-sess",
+				ConstTargetRoleTags:            map[string]any{"env": "target"},
+			},
+			expected: &CredentialAttributes{
+				Region:                    "eu-west-1",
+				DisableCredentialRotation: true,
+				RoleArn:                   targetRoleArn,
+				RoleExternalId:            "target-ext",
+				RoleSessionName:           "target-sess",
+				RoleTags:                  map[string]string{"env": "target"},
+			},
+		},
+		{
+			name: "optional target fields omitted do not copy principal role fields",
+			in: map[string]any{
+				ConstRegion:          "us-west-2",
+				ConstRoleArn:         "arn:aws:iam::111111111111:role/Principal",
+				ConstRoleExternalId:  "principal-ext",
+				ConstRoleSessionName: "principal-sess",
+				ConstRoleTags:        map[string]any{"env": "principal"},
+				ConstTargetRoleArn:   targetRoleArn,
+			},
+			expected: &CredentialAttributes{
+				Region:  "us-west-2",
+				RoleArn: targetRoleArn,
+			},
+		},
+		{
+			name: "disable_credential_rotation false is copied",
+			in: map[string]any{
+				ConstRegion:                    "us-west-2",
+				ConstDisableCredentialRotation: false,
+				ConstTargetRoleArn:             targetRoleArn,
+			},
+			expected: &CredentialAttributes{
+				Region:                    "us-west-2",
+				DisableCredentialRotation: false,
+				RoleArn:                   targetRoleArn,
+			},
+		},
+		{
+			name: "wrong type target_region",
+			in: map[string]any{
+				ConstRegion:        "us-west-2",
+				ConstTargetRoleArn: targetRoleArn,
+				ConstTargetRegion:  true,
+			},
+			expectedErrContains: "attributes.target_region: unexpected type for value \"target_region\": want string, got bool",
+		},
+		{
+			name: "wrong type target_role_external_id",
+			in: map[string]any{
+				ConstRegion:               "us-west-2",
+				ConstTargetRoleArn:        targetRoleArn,
+				ConstTargetRoleExternalId: true,
+			},
+			expectedErrContains: "attributes.target_role_external_id: unexpected type for value \"target_role_external_id\": want string, got bool",
+		},
+		{
+			name: "wrong type target_role_session_name",
+			in: map[string]any{
+				ConstRegion:                "us-west-2",
+				ConstTargetRoleArn:         targetRoleArn,
+				ConstTargetRoleSessionName: true,
+			},
+			expectedErrContains: "attributes.target_role_session_name: unexpected type for value \"target_role_session_name\": want string, got bool",
+		},
+		{
+			name: "wrong type target_role_tags",
+			in: map[string]any{
+				ConstRegion:         "us-west-2",
+				ConstTargetRoleArn:  targetRoleArn,
+				ConstTargetRoleTags: true,
+			},
+			expectedErrContains: "attributes.target_role_tags: unexpected type for value \"target_role_tags\": want map[string]string, got bool",
+		},
+		{
+			name: "wrong type target_role_tag value",
+			in: map[string]any{
+				ConstRegion:        "us-west-2",
+				ConstTargetRoleArn: targetRoleArn,
+				ConstTargetRoleTags: map[string]any{
+					"env": true,
+				},
+			},
+			expectedErrContains: `unexpected type for value in map["env"]: want string, got bool`,
+		},
+		{
+			name: "wrong type disable_credential_rotation",
+			in: map[string]any{
+				ConstRegion:                    "us-west-2",
+				ConstTargetRoleArn:             targetRoleArn,
+				ConstDisableCredentialRotation: "sure",
+			},
+			expectedErrContains: "attributes.disable_credential_rotation: unexpected type for value \"disable_credential_rotation\": want bool, got string",
+		},
+	}
+
+	for _, tc := range cases {
+		tc := tc
+		t.Run(tc.name, func(t *testing.T) {
+			require := require.New(t)
+
+			input, err := structpb.NewStruct(tc.in)
+			require.NoError(err)
+
+			actual, err := GetTargetCredentialAttributes(input)
+			if tc.expectedErrContains != "" {
+				require.Error(err)
+				require.Nil(actual)
+				require.Contains(err.Error(), tc.expectedErrContains)
+				require.Equal(codes.InvalidArgument, status.Code(err))
+				return
+			}
+
+			require.NoError(err)
+			require.Equal(tc.expected, actual)
+		})
+	}
+}
+
 func TestGetCredentialsConfig(t *testing.T) {
 	cases := []struct {
 		name                string

internal/credential/const.go

@@ -1,13 +1,13 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2021, 2026
 // SPDX-License-Identifier: MPL-2.0
 
 package credential
 
 const (
-	// ConstAccessKey is the key for the region in the aws credentials.
+	// ConstRegion is the key for the region in the aws credentials.
 	ConstRegion = "region"
 
-	// ConstAccessKey is the key for the access key id in the aws credentials.
+	// ConstAccessKeyId is the key for the access key id in the aws credentials.
 	ConstAccessKeyId = "access_key_id"
 
 	// ConstSecretAccessKey is the key for the secret access key in the aws credentials.
@@ -30,4 +30,19 @@ const (
 
 	// ConstRoleTags is the key for the tags used for assuming a IAM role.
 	ConstRoleTags = "role_tags"
+
+	// ConstTargetRegion is the key for the region of the target account in the aws credentials.
+	ConstTargetRegion = "target_region"
+
+	// ConstTargetRoleArn is the key for assuming a IAM role for the target account.
+	ConstTargetRoleArn = "target_role_arn"
+
+	// ConstTargetRoleExternalId is the key for the external id used for assuming a IAM role for the target account.
+	ConstTargetRoleExternalId = "target_role_external_id"
+
+	// ConstTargetRoleSessionName is the key for the session name used for assuming a IAM role of the target account.
+	ConstTargetRoleSessionName = "target_role_session_name"
+
+	// ConstTargetRoleTags is the key for the tags used for assuming a IAM role of the target account.
+	ConstTargetRoleTags = "target_role_tags"
 )

internal/credential/state.go

@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2021, 2026
 // SPDX-License-Identifier: MPL-2.0
 
 package credential
@@ -15,8 +15,8 @@ import (
 	iamTypes "github.com/aws/aws-sdk-go-v2/service/iam/types"
 	"github.com/aws/aws-sdk-go-v2/service/sts"
 	smithyEndpoints "github.com/aws/smithy-go/endpoints"
-	"github.com/hashicorp/boundary-plugin-aws/internal/errors"
-	"github.com/hashicorp/boundary-plugin-aws/internal/values"
+	"repo.anhonesthost.net/CyberCoveLLC/threshold-plugin-aws/internal/errors"
+	"repo.anhonesthost.net/CyberCoveLLC/threshold-plugin-aws/internal/values"
 	"github.com/hashicorp/go-secure-stdlib/awsutil/v2"
 	"google.golang.org/protobuf/types/known/structpb"
 )
@@ -112,10 +112,35 @@ func NewAwsCredentialPersistedState(opts ...AwsCredentialPersistedStateOption) (
 // and runs sts.GetCallerIdentity for the current credentials, which is done
 // to check that the credentials are valid. This method returns a status error
 // with PluginError details.
+//
+// When RoleARN is set and no static key is present (ambient role path),
+// credentials are eagerly retrieved before calling GetCallerIdentity. This
+// forces sts:AssumeRole to be called immediately so that any role errors
+// (e.g. no such role, access denied) surface here rather than being deferred
+// to the first real AWS API call.
 func (s *AwsCredentialPersistedState) ValidateCreds(ctx context.Context) error {
 	if s.CredentialsConfig == nil {
 		return errors.BadRequestStatus("missing credentials config")
 	}
+
+	// For the ambient role path (RoleARN set, no static key), eagerly resolve
+	// the credential chain so that sts:AssumeRole is called now. Without this,
+	// the AssumeRoleProvider inside the chain is lazy and GetCallerIdentity
+	// would succeed even with an invalid role ARN (it uses the mock/ambient
+	// identity directly rather than the assumed one).
+	cc := s.CredentialsConfig
+	if cc.RoleARN != "" && cc.AccessKey == "" {
+		cfg, err := s.GenerateCredentialChain(ctx)
+		if err != nil {
+			st, _ := errors.ParseAWSError("validating credentials", err)
+			return st.Err()
+		}
+		if _, err := cfg.Credentials.Retrieve(ctx); err != nil {
+			st, _ := errors.ParseAWSError("validating credentials", err)
+			return st.Err()
+		}
+	}
+
 	if _, err := s.CredentialsConfig.GetCallerIdentity(ctx, s.testOpts...); err != nil {
 		st, _ := errors.ParseAWSError("validating credentials", err)
 		return st.Err()
@@ -206,13 +231,7 @@ func (s *AwsCredentialPersistedState) DeleteCreds(ctx context.Context) error {
 
 // GenerateCredentialChain returns a AWS configuration for the credentials in the state.
 func (s *AwsCredentialPersistedState) GenerateCredentialChain(ctx context.Context) (*aws.Config, error) {
-	// Default `WithSharedCredentials` is `true` - This disables the ability to
-	// read credentials from environment variables because we set the default
-	// profile options, so we need to set it to false (see
-	// awsutil@v2.(*CredentialsConfig).generateAwsConfigOptions) for extra
-	// details.
-	opts := append(s.testOpts, awsutil.WithSharedCredentials(false))
-	return s.CredentialsConfig.GenerateCredentialChain(ctx, opts...)
+	return s.CredentialsConfig.GenerateCredentialChain(ctx, s.testOpts...)
 }
 
 // ToMap returns a map of the credentials stored in the persisted state.

internal/credential/state_test.go

@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2021, 2026
 // SPDX-License-Identifier: MPL-2.0
 
 package credential

internal/credential/testing.go

@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2021, 2026
 // SPDX-License-Identifier: MPL-2.0
 
 package credential

internal/errors/error.go

@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2021, 2026
 // SPDX-License-Identifier: MPL-2.0
 
 package errors
@@ -16,8 +16,9 @@ import (
 
 	"github.com/aws/aws-sdk-go-v2/aws/retry"
 	awshttp "github.com/aws/aws-sdk-go-v2/aws/transport/http"
+	"github.com/aws/aws-sdk-go-v2/service/s3/types"
 	"github.com/aws/smithy-go"
-	pb "github.com/hashicorp/boundary/sdk/pbs/plugin"
+	pb "repo.anhonesthost.net/CyberCoveLLC/threshold/sdk/pbs/plugin"
 	"google.golang.org/protobuf/types/known/timestamppb"
 )
 
@@ -28,6 +29,11 @@ const (
 	// the owner. This error cannot be resolved by retrying the request.
 	awsErrorAccessDenied = "AccessDenied"
 
+	// awsErrorUnauthorizedOperation is returned by EC2 when the caller is not
+	// authorized to perform the operation. This includes DryRun permission
+	// checks that fail (the counterpart to DryRunOperation success).
+	awsErrorUnauthorizedOperation = "UnauthorizedOperation"
+
 	// awsErrorInvalidAccessKeyId is returned when the credential does
 	// not exist. This error will persist until the credentials attached
 	// to the storage bucket is updated. This error can occur when the
@@ -52,6 +58,10 @@ const (
 	// whose key does not exist
 	awsErrorNoSuchKey = "NoSuchKey"
 
+	// NotFound is returned when attempting to interact with an S3 object
+	// whose key does not exist
+	awsErrorNotFound = "NotFound"
+
 	// The InvalidObjectState error is returned when trying to
 	// access an object that was moved into cold storage.
 	awsErrorInvalidObjectState = "InvalidObjectState"
@@ -61,8 +71,26 @@ const (
 
 	// RequestTimeoutException is returned when an http request takes longer than allowed
 	awsErrorRequestTimeoutException = "RequestTimeoutException"
+
+	// dryRunOperationErrorCode is returned by AWS when a DryRun request would have
+	// succeeded. It is a success signal disguised as an API error (typically HTTP 412).
+	dryRunOperationErrorCode = "DryRunOperation"
 )
 
+// IsDryRunSuccess reports whether err is the AWS DryRunOperation success signal.
+// A true result means the dry-run validated credentials, permissions, and parameters;
+// it must not be treated as a failure.
+func IsDryRunSuccess(err error) bool {
+	if err == nil {
+		return false
+	}
+	var apiErr smithy.APIError
+	if !errors.As(err, &apiErr) {
+		return false
+	}
+	return apiErr.ErrorCode() == dryRunOperationErrorCode
+}
+
 // InvalidArgumentError returns an grpc invalid argument status error.
 func InvalidArgumentError(msg string, f map[string]string) error {
 	var fieldMsgs []string
@@ -118,12 +146,57 @@ func ParseAWSError(op string, err error) (st *status.Status, permission *pb.Perm
 		return status.New(codes.Unavailable, statusMsg), nil
 	}
 
-	// parse some specific aws error codes that we have special cred states for
+	// match error type against NotFound
+	var notFoundErr *types.NotFound
+	if errors.As(err, &notFoundErr) {
+		statusMsg := fmt.Sprintf("aws service %s: %s", serviceName, msg)
+		return status.New(codes.NotFound, statusMsg), nil
+	}
+
+	// match error type against NoSuchkey
+	var noSuchKeyErr *types.NoSuchKey
+	if errors.As(err, &noSuchKeyErr) {
+		statusMsg := fmt.Sprintf("aws service %s: %s", serviceName, msg)
+		return status.New(codes.NotFound, statusMsg), nil
+	}
+
+	// match error type against InvalidObjectState
+	var invalidObjectStateErr *types.InvalidObjectState
+	if errors.As(err, &invalidObjectStateErr) {
+		statusMsg := fmt.Sprintf("aws service %s: %s", serviceName, msg)
+		return status.New(codes.NotFound, statusMsg), nil
+	}
+
+	// match error type against NoSuchBucket
+	var noSuchBucketErr *types.NoSuchBucket
+	if errors.As(err, &noSuchBucketErr) {
+		statusMsg := fmt.Sprintf("aws service %s: %s", serviceName, msg)
+		return status.New(codes.NotFound, statusMsg), &pb.Permission{
+			State:        pb.StateType_STATE_TYPE_ERROR,
+			ErrorDetails: noSuchBucketErr.ErrorMessage(),
+			CheckedAt:    timestamppb.Now(),
+		}
+	}
+
+	// match error type against AccessDenied
+	var accessDeniedErr *types.AccessDenied
+	if errors.As(err, &accessDeniedErr) {
+		statusMsg := fmt.Sprintf("aws service %s: invalid credentials: %s", serviceName, msg)
+		return status.New(codes.PermissionDenied, statusMsg), &pb.Permission{
+			State:        pb.StateType_STATE_TYPE_ERROR,
+			ErrorDetails: accessDeniedErr.ErrorMessage(),
+			CheckedAt:    timestamppb.Now(),
+		}
+	}
+
+	// fallback to evaluating the smithy APIError code
 	var apiErr smithy.APIError
 	if errors.As(err, &apiErr) {
 		switch apiErr.ErrorCode() {
 		case awsErrorAccessDenied:
 			fallthrough
+		case awsErrorUnauthorizedOperation:
+			fallthrough
 		case awsErrorInvalidAccessKeyId:
 			fallthrough
 		case awsErrorExpiredToken:
@@ -145,6 +218,8 @@ func ParseAWSError(op string, err error) (st *status.Status, permission *pb.Perm
 			return status.New(codes.Aborted, statusMsg), nil
 		case awsErrorNoSuchKey:
 			fallthrough
+		case awsErrorNotFound:
+			fallthrough
 		case awsErrorInvalidObjectState:
 			statusMsg := fmt.Sprintf("aws service %s: %s", serviceName, msg)
 			return status.New(codes.NotFound, statusMsg), nil
@@ -156,8 +231,9 @@ func ParseAWSError(op string, err error) (st *status.Status, permission *pb.Perm
 		}
 	}
 
-	// default to evaluating the http status code
-	if httpErr, ok := err.(*awshttp.ResponseError); ok {
+	// fallback to evaluating the http status code
+	var httpErr *awshttp.ResponseError
+	if errors.As(err, &httpErr) {
 		buf := new(bytes.Buffer)
 		_, err = buf.ReadFrom(httpErr.Response.Body)
 		if err != nil {
@@ -206,14 +282,26 @@ func ParseAWSError(op string, err error) (st *status.Status, permission *pb.Perm
 	return st, nil
 }
 
-// BadRequestStatus returns a status error with an invalid
-// argument code
-func BadRequestStatus(format string, args ...any) error {
+// BadRequestStatusf returns a status error with an invalid
+// argument code and a formatted error message.
+func BadRequestStatusf(format string, args ...any) error {
 	return status.New(codes.InvalidArgument, fmt.Sprintf(format, args...)).Err()
 }
 
-// UnknownStatus returns a status error with an internal
-// error code
-func UnknownStatus(format string, args ...any) error {
+// BadRequestStatus returns a status error with an invalid
+// argument code and the provided message.
+func BadRequestStatus(msg string) error {
+	return status.New(codes.InvalidArgument, msg).Err()
+}
+
+// UnknownStatusf returns a status error with an internal
+// error code and a formatted error message.
+func UnknownStatusf(format string, args ...any) error {
 	return status.New(codes.Internal, fmt.Sprintf(format, args...)).Err()
 }
+
+// UnknownStatus returns a status error with an internal
+// error code and the provided message.
+func UnknownStatus(msg string) error {
+	return status.New(codes.Internal, msg).Err()
+}

internal/errors/error_test.go

@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2021, 2026
 // SPDX-License-Identifier: MPL-2.0
 
 package errors
@@ -9,7 +9,7 @@ import (
 
 	"net/http"
 
-	pb "github.com/hashicorp/boundary/sdk/pbs/plugin"
+	pb "repo.anhonesthost.net/CyberCoveLLC/threshold/sdk/pbs/plugin"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
 	"google.golang.org/grpc/codes"
@@ -134,6 +134,17 @@ func Test_ParseAWSError(t *testing.T) {
 				State: pb.StateType_STATE_TYPE_UNKNOWN,
 			},
 		},
+		{
+			name:               "wrapped-http-status-code-forbidden",
+			err:                fmt.Errorf("wrap: %w", TestAwsHttpResponseError(http.StatusForbidden, "forbidden request")),
+			expectedStatusCode: codes.PermissionDenied,
+			expectedStatusMsg:  "aws service unknown: invalid credentials: test",
+			expectedPermission: &pb.Permission{
+				State:        pb.StateType_STATE_TYPE_ERROR,
+				ErrorDetails: "forbidden request",
+				CheckedAt:    timestamppb.Now(),
+			},
+		},
 		{
 			name:               "aws-throttling",
 			err:                TestAwsError("Throttling", "throttling error"),
@@ -289,6 +300,17 @@ func Test_ParseAWSError(t *testing.T) {
 				CheckedAt:    timestamppb.Now(),
 			},
 		},
+		{
+			name:               "aws-request-unauthorized-operation",
+			err:                TestAwsError(awsErrorUnauthorizedOperation, "You are not authorized to perform this operation."),
+			expectedStatusCode: codes.PermissionDenied,
+			expectedStatusMsg:  "aws service unknown: invalid credentials: test",
+			expectedPermission: &pb.Permission{
+				State:        pb.StateType_STATE_TYPE_ERROR,
+				ErrorDetails: "You are not authorized to perform this operation.",
+				CheckedAt:    timestamppb.Now(),
+			},
+		},
 		{
 			name:               "aws-request-invalid-access-key-id",
 			err:                TestAwsError(awsErrorInvalidAccessKeyId, "The AWS Access Key Id you provided does not exist in our records."),
@@ -311,6 +333,55 @@ func Test_ParseAWSError(t *testing.T) {
 				CheckedAt:    timestamppb.Now(),
 			},
 		},
+		{
+			name:               "aws-s3-typed-not-found",
+			err:                TestAwsS3NotFoundError("object was not found"),
+			expectedStatusCode: codes.NotFound,
+			expectedStatusMsg:  "aws service unknown: test",
+			expectedPermission: &pb.Permission{
+				State: pb.StateType_STATE_TYPE_UNKNOWN,
+			},
+		},
+		{
+			name:               "aws-s3-typed-no-such-key",
+			err:                TestAwsS3NoSuchKeyError("key does not exist"),
+			expectedStatusCode: codes.NotFound,
+			expectedStatusMsg:  "aws service unknown: test",
+			expectedPermission: &pb.Permission{
+				State: pb.StateType_STATE_TYPE_UNKNOWN,
+			},
+		},
+		{
+			name:               "aws-s3-typed-invalid-object-state",
+			err:                TestAwsS3InvalidObjectStateError("object is archived"),
+			expectedStatusCode: codes.NotFound,
+			expectedStatusMsg:  "aws service unknown: test",
+			expectedPermission: &pb.Permission{
+				State: pb.StateType_STATE_TYPE_UNKNOWN,
+			},
+		},
+		{
+			name:               "aws-s3-typed-no-such-bucket",
+			err:                TestAwsS3NoSuchBucketError("bucket does not exist"),
+			expectedStatusCode: codes.NotFound,
+			expectedStatusMsg:  "aws service unknown: test",
+			expectedPermission: &pb.Permission{
+				State:        pb.StateType_STATE_TYPE_ERROR,
+				ErrorDetails: "bucket does not exist",
+				CheckedAt:    timestamppb.Now(),
+			},
+		},
+		{
+			name:               "aws-s3-typed-access-denied",
+			err:                TestAwsS3AccessDeniedError("access denied"),
+			expectedStatusCode: codes.PermissionDenied,
+			expectedStatusMsg:  "aws service unknown: invalid credentials: test",
+			expectedPermission: &pb.Permission{
+				State:        pb.StateType_STATE_TYPE_ERROR,
+				ErrorDetails: "access denied",
+				CheckedAt:    timestamppb.Now(),
+			},
+		},
 	}
 	for _, tt := range cases {
 		t.Run(tt.name, func(t *testing.T) {
@@ -330,18 +401,76 @@ func Test_ParseAWSError(t *testing.T) {
 	}
 }
 
-func Test_BadRequestStatus(t *testing.T) {
+func Test_IsDryRunSuccess(t *testing.T) {
+	t.Parallel()
+
+	cases := []struct {
+		name string
+		err  error
+		want bool
+	}{
+		{
+			name: "nil",
+			want: false,
+		},
+		{
+			name: "plain error",
+			err:  fmt.Errorf("not an aws error"),
+			want: false,
+		},
+		{
+			name: "other api error",
+			err:  TestAwsError(awsErrorAccessDenied, "not authorized"),
+			want: false,
+		},
+		{
+			name: "dry run operation",
+			err:  TestAwsError(dryRunOperationErrorCode, "Request would have succeeded, but DryRun flag is set"),
+			want: true,
+		},
+		{
+			name: "wrapped dry run operation",
+			err:  fmt.Errorf("describe instances: %w", TestAwsError(dryRunOperationErrorCode, "Request would have succeeded, but DryRun flag is set")),
+			want: true,
+		},
+	}
+	for _, tt := range cases {
+		t.Run(tt.name, func(t *testing.T) {
+			assert.Equal(t, tt.want, IsDryRunSuccess(tt.err))
+		})
+	}
+}
+
+func Test_BadRequestStatusf(t *testing.T) {
 	require, assert := require.New(t), assert.New(t)
-	err := BadRequestStatus("test: %s", "hello world")
+	err := BadRequestStatusf("test: %s", "hello world")
 	assert.ErrorContains(err, "test: hello world")
 	assert.Equal(status.Code(err), codes.InvalidArgument)
 	_, ok := status.FromError(err)
 	require.True(ok)
 }
 
-func Test_UnknownStatus(t *testing.T) {
+func Test_BadRequestStatus(t *testing.T) {
 	require, assert := require.New(t), assert.New(t)
-	err := UnknownStatus("test: %s", "hello world")
+	err := BadRequestStatus("test: hello world")
+	assert.ErrorContains(err, "test: hello world")
+	assert.Equal(status.Code(err), codes.InvalidArgument)
+	_, ok := status.FromError(err)
+	require.True(ok)
+}
+
+func Test_UnknownStatusf(t *testing.T) {
+	require, assert := require.New(t), assert.New(t)
+	err := UnknownStatusf("test: %s", "hello world")
+	assert.ErrorContains(err, "test: hello world")
+	assert.Equal(status.Code(err), codes.Internal)
+	_, ok := status.FromError(err)
+	require.True(ok)
+}
+
+func Test_UnknownStatus(t *testing.T) {
+	require, assert := require.New(t), assert.New(t)
+	err := UnknownStatusf("test: hello world")
 	assert.ErrorContains(err, "test: hello world")
 	assert.Equal(status.Code(err), codes.Internal)
 	_, ok := status.FromError(err)

internal/errors/testing.go

@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2021, 2026
 // SPDX-License-Identifier: MPL-2.0
 
 package errors
@@ -9,9 +9,10 @@ import (
 	"strings"
 
 	awshttp "github.com/aws/aws-sdk-go-v2/aws/transport/http"
+	"github.com/aws/aws-sdk-go-v2/service/s3/types"
 	"github.com/aws/smithy-go"
 	smithyhttp "github.com/aws/smithy-go/transport/http"
-	pb "github.com/hashicorp/boundary/sdk/pbs/plugin"
+	pb "repo.anhonesthost.net/CyberCoveLLC/threshold/sdk/pbs/plugin"
 	"github.com/stretchr/testify/assert"
 	"google.golang.org/protobuf/types/known/timestamppb"
 )
@@ -39,6 +40,31 @@ func TestAwsError(code, msg string) error {
 	}
 }
 
+// TestAwsS3NotFoundError returns an S3 NotFound error.
+func TestAwsS3NotFoundError(msg string) error {
+	return &types.NotFound{Message: &msg}
+}
+
+// TestAwsS3NoSuchKeyError returns an S3 NoSuchKey error.
+func TestAwsS3NoSuchKeyError(msg string) error {
+	return &types.NoSuchKey{Message: &msg}
+}
+
+// TestAwsS3InvalidObjectStateError returns an S3 InvalidObjectState error.
+func TestAwsS3InvalidObjectStateError(msg string) error {
+	return &types.InvalidObjectState{Message: &msg}
+}
+
+// TestAwsS3NoSuchBucketError returns an S3 NoSuchBucket error.
+func TestAwsS3NoSuchBucketError(msg string) error {
+	return &types.NoSuchBucket{Message: &msg}
+}
+
+// TestAwsS3AccessDeniedError returns an S3 AccessDenied error.
+func TestAwsS3AccessDeniedError(msg string) error {
+	return &types.AccessDenied{Message: &msg}
+}
+
 func CheckSimilarPermission(assert *assert.Assertions, expected, actual *pb.Permission, substituteNilWithDefaultOk bool) {
 	if expected == nil && substituteNilWithDefaultOk {
 		expected = &pb.Permission{

internal/values/proto.go

@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2021, 2026
 // SPDX-License-Identifier: MPL-2.0
 
 package values

internal/values/proto_test.go

@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2021, 2026
 // SPDX-License-Identifier: MPL-2.0
 
 package values

plugin/plugin.go

@@ -1,12 +1,12 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2021, 2026
 // SPDX-License-Identifier: MPL-2.0
 
 package plugin
 
 import (
-	"github.com/hashicorp/boundary-plugin-aws/plugin/service/host"
-	"github.com/hashicorp/boundary-plugin-aws/plugin/service/storage"
-	pb "github.com/hashicorp/boundary/sdk/pbs/plugin"
+	"repo.anhonesthost.net/CyberCoveLLC/threshold-plugin-aws/plugin/service/host"
+	"repo.anhonesthost.net/CyberCoveLLC/threshold-plugin-aws/plugin/service/storage"
+	pb "repo.anhonesthost.net/CyberCoveLLC/threshold/sdk/pbs/plugin"
 )
 
 // Ensure that AWSPlugin implementings the following services:
@@ -32,6 +32,6 @@ type AwsPlugin struct {
 func NewAwsPlugin() *AwsPlugin {
 	return &AwsPlugin{
 		HostPlugin:    &host.HostPlugin{},
-		StoragePlugin: &storage.StoragePlugin{},
+		StoragePlugin: storage.New(),
 	}
 }

plugin/service/host/README.md

@@ -109,13 +109,23 @@ The following `attributes` are valid on an AWS host catalog resource:
 - `region` (string): The region to configure the host catalog for. All host sets
   in this catalog will be configured for this region.
 - `role_arn` (string): The AWS Role ARN used for `AssumeRole` authentication. If
-  provided, `disable_credential_rotation` must be also set to `true.
-- `role_external_id` (string):  The external id configured for the `AssumeRole`
+  provided, `disable_credential_rotation` must be also set to `true`.
+- `role_external_id` (string): The external ID configured for the principal `AssumeRole`
   provider.
-- `role_session_name` (string): The session name configured for the `AssumeRole`
+- `role_session_name` (string): The session name configured for the principal `AssumeRole`
   provider.
-- `role_tags` (object): The key-value pair tags configured for the `AssumeRole`
+- `role_tags` (object): The key-value pair tags configured for the principal `AssumeRole`
   provider.
+- `target_role_arn` (string): The AWS role ARN of the target IAM role to assume for
+  cross-account discovery. Required if any other `target_*` attributes are configured.
+- `target_region` (string): The region where the target hosts reside. Defaults to the
+  principal account `region` if omitted.
+- `target_role_external_id` (string): The external ID configured for the target
+  `AssumeRole` provider.
+- `target_role_session_name` (string): The session name configured for the target
+  `AssumeRole` provider.
+- `target_role_tags` (object): The key-value pair tags configured for the target
+  `AssumeRole` provider.
 
 The following `secrets` are required on an AWS host catalog resource:
 

plugin/service/host/attributes.go

@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2021, 2026
 // SPDX-License-Identifier: MPL-2.0
 
 package host
@@ -6,9 +6,9 @@ package host
 import (
 	"fmt"
 
-	cred "github.com/hashicorp/boundary-plugin-aws/internal/credential"
-	"github.com/hashicorp/boundary-plugin-aws/internal/errors"
-	"github.com/hashicorp/boundary-plugin-aws/internal/values"
+	cred "repo.anhonesthost.net/CyberCoveLLC/threshold-plugin-aws/internal/credential"
+	"repo.anhonesthost.net/CyberCoveLLC/threshold-plugin-aws/internal/errors"
+	"repo.anhonesthost.net/CyberCoveLLC/threshold-plugin-aws/internal/values"
 	"github.com/mitchellh/mapstructure"
 	"google.golang.org/grpc/codes"
 	"google.golang.org/grpc/status"
@@ -20,8 +20,16 @@ import (
 type CatalogAttributes struct {
 	*cred.CredentialAttributes
 
+	// TargetAccount optionally holds the credentials used to AssumeRole into a second, affiliated account when provided.
+	TargetAccount *cred.CredentialAttributes
+
 	// DualStack is used for configuring how the aws client will resolve requests.
 	DualStack bool
+
+	// InstanceAddressesOnly specifies whether only the instance addresses (private IPv4/DNS,
+	// public IPv4/DNS, and IPv6) are synced, or all addresses, including those from
+	// secondary ENIs, are synced.
+	InstanceAddressesOnly bool
 }
 
 func getCatalogAttributes(in *structpb.Struct) (*CatalogAttributes, error) {
@@ -34,12 +42,26 @@ func getCatalogAttributes(in *structpb.Struct) (*CatalogAttributes, error) {
 		return nil, err
 	}
 
+	var targetCredAttributes *cred.CredentialAttributes
+	if hasTargetAccountAttributes(in) {
+		targetCredAttributes, err = cred.GetTargetCredentialAttributes(in)
+		if err != nil {
+			return nil, err
+		}
+	}
+
 	dualStack, err := values.GetBoolValue(in, ConstAwsDualStack, false)
 	if err != nil {
 		badFields[fmt.Sprintf("attributes.%s", ConstAwsDualStack)] = err.Error()
 	}
 	delete(unknownFields, ConstAwsDualStack)
 
+	instanceAddressesOnly, err := values.GetBoolValue(in, ConstInstanceAddressesOnly, false)
+	if err != nil {
+		badFields[fmt.Sprintf("attributes.%s", ConstInstanceAddressesOnly)] = err.Error()
+	}
+	delete(unknownFields, ConstInstanceAddressesOnly)
+
 	for s := range unknownFields {
 		switch s {
 		// Ignore knownFields from CredentialAttributes
@@ -55,6 +77,16 @@ func getCatalogAttributes(in *structpb.Struct) (*CatalogAttributes, error) {
 			continue
 		case cred.ConstRoleTags:
 			continue
+		case cred.ConstTargetRegion:
+			continue
+		case cred.ConstTargetRoleArn:
+			continue
+		case cred.ConstTargetRoleExternalId:
+			continue
+		case cred.ConstTargetRoleSessionName:
+			continue
+		case cred.ConstTargetRoleTags:
+			continue
 		default:
 			badFields[fmt.Sprintf("attributes.%s", s)] = "unrecognized field"
 		}
@@ -66,7 +98,9 @@ func getCatalogAttributes(in *structpb.Struct) (*CatalogAttributes, error) {
 
 	return &CatalogAttributes{
 		CredentialAttributes:  credAttributes,
+		TargetAccount:         targetCredAttributes,
 		DualStack:             dualStack,
+		InstanceAddressesOnly: instanceAddressesOnly,
 	}, nil
 }
 
@@ -109,3 +143,19 @@ func getSetAttributes(in *structpb.Struct) (*SetAttributes, error) {
 
 	return &setAttrs, nil
 }
+
+func hasTargetAccountAttributes(in *structpb.Struct) bool {
+	fields := in.GetFields()
+
+	_, hasTargetRegion := fields[cred.ConstTargetRegion]
+	_, hasTargetRoleArn := fields[cred.ConstTargetRoleArn]
+	_, hasTargetRoleExternalID := fields[cred.ConstTargetRoleExternalId]
+	_, hasTargetRoleSessionName := fields[cred.ConstTargetRoleSessionName]
+	_, hasTargetRoleTags := fields[cred.ConstTargetRoleTags]
+
+	return hasTargetRegion ||
+		hasTargetRoleArn ||
+		hasTargetRoleExternalID ||
+		hasTargetRoleSessionName ||
+		hasTargetRoleTags
+}

plugin/service/host/attributes_test.go

@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2021, 2026
 // SPDX-License-Identifier: MPL-2.0
 
 package host
@@ -8,9 +8,9 @@ import (
 	"testing"
 
 	"github.com/google/go-cmp/cmp"
-	"github.com/hashicorp/boundary-plugin-aws/internal/credential"
-	cred "github.com/hashicorp/boundary-plugin-aws/internal/credential"
-	"github.com/hashicorp/boundary/sdk/pbs/plugin"
+	"repo.anhonesthost.net/CyberCoveLLC/threshold-plugin-aws/internal/credential"
+	cred "repo.anhonesthost.net/CyberCoveLLC/threshold-plugin-aws/internal/credential"
+	"repo.anhonesthost.net/CyberCoveLLC/threshold/sdk/pbs/plugin"
 	"github.com/stretchr/testify/require"
 	"google.golang.org/grpc/codes"
 	"google.golang.org/grpc/status"
@@ -59,6 +59,22 @@ func TestGetCatalogAttributes(t *testing.T) {
 				DualStack: true,
 			},
 		},
+		{
+			name: "withInstanceAddressesOnly",
+			in: &structpb.Struct{
+				Fields: map[string]*structpb.Value{
+					"region":                  structpb.NewStringValue("us-west-2"),
+					"instance_addresses_only": structpb.NewBoolValue(true),
+				},
+			},
+			expected: &CatalogAttributes{
+				CredentialAttributes: &credential.CredentialAttributes{
+					Region:                    "us-west-2",
+					DisableCredentialRotation: false,
+				},
+				InstanceAddressesOnly: true,
+			},
+		},
 		{
 			name: "default",
 			in: &structpb.Struct{
@@ -102,6 +118,170 @@ func TestGetCatalogAttributes(t *testing.T) {
 				},
 			},
 		},
+		{
+			name: "target_region without target_role_arn",
+			in: &structpb.Struct{
+				Fields: map[string]*structpb.Value{
+					"region":        structpb.NewStringValue("us-west-2"),
+					"target_region": structpb.NewStringValue("eu-west-1"),
+				},
+			},
+			expectedErrContains: "attributes.target_role_arn: missing required value \"target_role_arn\"",
+		},
+		{
+			name: "target role field without target_role_arn",
+			in: &structpb.Struct{
+				Fields: map[string]*structpb.Value{
+					"region":                  structpb.NewStringValue("us-west-2"),
+					"target_role_external_id": structpb.NewStringValue("target-ext"),
+				},
+			},
+			expectedErrContains: "attributes.target_role_arn: missing required value \"target_role_arn\"",
+		},
+		{
+			name: "other target role fields without target_role_arn",
+			in: &structpb.Struct{
+				Fields: map[string]*structpb.Value{
+					"region":                   structpb.NewStringValue("us-west-2"),
+					"target_role_session_name": structpb.NewStringValue("target-session"),
+					"target_role_tags": structpb.NewStructValue(&structpb.Struct{
+						Fields: map[string]*structpb.Value{
+							"env": structpb.NewStringValue("target"),
+						},
+					}),
+				},
+			},
+			expectedErrContains: "attributes.target_role_arn: missing required value \"target_role_arn\"",
+		},
+		{
+			name: "empty target_role_arn with target_region",
+			in: &structpb.Struct{
+				Fields: map[string]*structpb.Value{
+					"region":          structpb.NewStringValue("us-west-2"),
+					"target_role_arn": structpb.NewStringValue(""),
+					"target_region":   structpb.NewStringValue("eu-west-1"),
+				},
+			},
+			expectedErrContains: "attributes.target_role_arn: value \"target_role_arn\" cannot be empty",
+		},
+		{
+			name: "target_role_arn without target_region uses region; principal sts fields are not copied",
+			in: &structpb.Struct{
+				Fields: map[string]*structpb.Value{
+					"region":                      structpb.NewStringValue("us-west-2"),
+					"disable_credential_rotation": structpb.NewBoolValue(true),
+					"role_arn":                    structpb.NewStringValue("arn:aws:iam::111111111111:role/Principal"),
+					"role_external_id":            structpb.NewStringValue("principal-ext"),
+					"role_session_name":           structpb.NewStringValue("principal-sess"),
+					"role_tags": structpb.NewStructValue(&structpb.Struct{
+						Fields: map[string]*structpb.Value{
+							"env": structpb.NewStringValue("principal"),
+						},
+					}),
+					"target_role_arn": structpb.NewStringValue("arn:aws:iam::222222222222:role/Target"),
+				},
+			},
+			expected: &CatalogAttributes{
+				CredentialAttributes: &cred.CredentialAttributes{
+					Region:                    "us-west-2",
+					DisableCredentialRotation: true,
+					RoleArn:                   "arn:aws:iam::111111111111:role/Principal",
+					RoleExternalId:            "principal-ext",
+					RoleSessionName:           "principal-sess",
+					RoleTags: map[string]string{
+						"env": "principal",
+					},
+				},
+				TargetAccount: &cred.CredentialAttributes{
+					Region:                    "us-west-2",
+					DisableCredentialRotation: true,
+					RoleArn:                   "arn:aws:iam::222222222222:role/Target",
+				},
+			},
+		},
+		{
+			name: "target attributes are independent of principal",
+			in: &structpb.Struct{
+				Fields: map[string]*structpb.Value{
+					"region":                      structpb.NewStringValue("us-west-2"),
+					"disable_credential_rotation": structpb.NewBoolValue(true),
+					"role_arn":                    structpb.NewStringValue("arn:aws:iam::111111111111:role/Principal"),
+					"role_external_id":            structpb.NewStringValue("principal-ext"),
+					"role_session_name":           structpb.NewStringValue("principal-sess"),
+					"role_tags": structpb.NewStructValue(&structpb.Struct{
+						Fields: map[string]*structpb.Value{
+							"env": structpb.NewStringValue("principal"),
+						},
+					}),
+					"target_role_arn":          structpb.NewStringValue("arn:aws:iam::222222222222:role/Target"),
+					"target_region":            structpb.NewStringValue("eu-west-1"),
+					"target_role_external_id":  structpb.NewStringValue("target-ext"),
+					"target_role_session_name": structpb.NewStringValue("target-sess"),
+					"target_role_tags": structpb.NewStructValue(&structpb.Struct{
+						Fields: map[string]*structpb.Value{
+							"env": structpb.NewStringValue("target"),
+						},
+					}),
+				},
+			},
+			expected: &CatalogAttributes{
+				CredentialAttributes: &cred.CredentialAttributes{
+					Region:                    "us-west-2",
+					DisableCredentialRotation: true,
+					RoleArn:                   "arn:aws:iam::111111111111:role/Principal",
+					RoleExternalId:            "principal-ext",
+					RoleSessionName:           "principal-sess",
+					RoleTags: map[string]string{
+						"env": "principal",
+					},
+				},
+				TargetAccount: &cred.CredentialAttributes{
+					Region:                    "eu-west-1",
+					DisableCredentialRotation: true,
+					RoleArn:                   "arn:aws:iam::222222222222:role/Target",
+					RoleExternalId:            "target-ext",
+					RoleSessionName:           "target-sess",
+					RoleTags: map[string]string{
+						"env": "target",
+					},
+				},
+			},
+		},
+		{
+			name: "catalog dual_stack and instance_addresses_only with target",
+			in: &structpb.Struct{
+				Fields: map[string]*structpb.Value{
+					"region":                  structpb.NewStringValue("us-west-2"),
+					"dual_stack":              structpb.NewBoolValue(true),
+					"instance_addresses_only": structpb.NewBoolValue(true),
+					"target_role_arn":         structpb.NewStringValue("arn:aws:iam::222222222222:role/Target"),
+				},
+			},
+			expected: &CatalogAttributes{
+				CredentialAttributes: &credential.CredentialAttributes{
+					Region:                    "us-west-2",
+					DisableCredentialRotation: false,
+				},
+				TargetAccount: &cred.CredentialAttributes{
+					Region:                    "us-west-2",
+					DisableCredentialRotation: false,
+					RoleArn:                   "arn:aws:iam::222222222222:role/Target",
+				},
+				DualStack:             true,
+				InstanceAddressesOnly: true,
+			},
+		},
+		{
+			name: "unknown field with target_role_arn",
+			in: &structpb.Struct{
+				Fields: map[string]*structpb.Value{
+					"region":          structpb.NewStringValue("us-west-2"),
+					"target_role_arn": structpb.NewStringValue("arn:aws:iam::222222222222:role/Target"),
+					"foo":             structpb.NewBoolValue(true),
+				},
+			},
+			expectedErrContains: "attributes.foo: unrecognized field",
+		},
 	}
 
 	for _, tc := range cases {

plugin/service/host/const.go

@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2021, 2026
 // SPDX-License-Identifier: MPL-2.0
 
 package host
@@ -13,4 +13,9 @@ const (
 
 	// ConstAwsDualStack is the key for the dualstack flag in the aws s3 client.
 	ConstAwsDualStack = "dual_stack"
+
+	// ConstInstanceAddressesOnly is the key (instance_addresses_only) that specifies whether
+	// only the instance addresses (private IPv4/DNS, public IPv4/DNS, and IPv6) are synced,
+	// or all addresses, including those from secondary ENIs, are synced.
+	ConstInstanceAddressesOnly = "instance_addresses_only"
 )

plugin/service/host/plugin.go

@@ -1,6 +1,6 @@
 package host
 
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2021, 2026
 // SPDX-License-Identifier: MPL-2.0
 
 import (
@@ -9,11 +9,14 @@ import (
 	"strings"
 
 	"github.com/aws/aws-sdk-go-v2/aws"
+	"github.com/aws/aws-sdk-go-v2/credentials/stscreds"
 	"github.com/aws/aws-sdk-go-v2/service/ec2"
 	"github.com/aws/aws-sdk-go-v2/service/ec2/types"
-	"github.com/hashicorp/boundary-plugin-aws/internal/credential"
-	"github.com/hashicorp/boundary-plugin-aws/internal/errors"
-	pb "github.com/hashicorp/boundary/sdk/pbs/plugin"
+	"github.com/aws/aws-sdk-go-v2/service/sts"
+	stsTypes "github.com/aws/aws-sdk-go-v2/service/sts/types"
+	"repo.anhonesthost.net/CyberCoveLLC/threshold-plugin-aws/internal/credential"
+	"repo.anhonesthost.net/CyberCoveLLC/threshold-plugin-aws/internal/errors"
+	pb "repo.anhonesthost.net/CyberCoveLLC/threshold/sdk/pbs/plugin"
 	"google.golang.org/grpc/codes"
 	"google.golang.org/grpc/status"
 	"google.golang.org/protobuf/proto"
@@ -32,6 +35,16 @@ type HostPlugin struct {
 	testCatalogStateOpts []awsCatalogPersistedStateOption
 }
 
+type hostSetQuery struct {
+	Id          string
+	Input       *ec2.DescribeInstancesInput
+	Output      *ec2.DescribeInstancesOutput
+	OutputHosts []*pb.ListHostsResponseHost
+}
+
+const errBuildDescribeInstancesInput = "error building DescribeInstances input: %s"
+const errDryRunFailed = "error performing DescribeInstances dry run: %s"
+
 // Ensure that we are implementing HostPluginServiceServer
 var _ pb.HostPluginServiceServer = (*HostPlugin)(nil)
 
@@ -63,7 +76,7 @@ func (p *HostPlugin) OnCreateCatalog(ctx context.Context, req *pb.OnCreateCatalo
 		}, p.testCredStateOpts...)...,
 	)
 	if err != nil {
-		return nil, errors.BadRequestStatus("error setting up persisted state: %s", err)
+		return nil, errors.BadRequestStatusf("error setting up persisted state: %s", err)
 	}
 
 	// Try to rotate AWS static credentials
@@ -73,27 +86,44 @@ func (p *HostPlugin) OnCreateCatalog(ctx context.Context, req *pb.OnCreateCatalo
 		}
 	}
 
+	// Validate assumed-role credentials at catalog-creation time so that an
+	// invalid role_arn is rejected immediately rather than silently falling
+	// back to ambient credentials.
+	if credential.GetCredentialType(credState.CredentialsConfig) == credential.DynamicAWS {
+		if err := credState.ValidateCreds(ctx); err != nil {
+			return nil, err
+		}
+	}
+
 	catalogState, err := newAwsCatalogPersistedState(
 		append([]awsCatalogPersistedStateOption{
 			withCredentials(credState),
 		}, p.testCatalogStateOpts...)...,
 	)
 	if err != nil {
-		return nil, errors.BadRequestStatus("error setting up persisted state: %s", err)
+		return nil, errors.BadRequestStatusf("error setting up persisted state: %s", err)
 	}
 
-	// perform dry run to ensure we can interact with AWS as expected.
 	opts := []ec2Option{}
 	if catalogAttributes.DualStack {
 		opts = append(opts, WithDualStack(catalogAttributes.DualStack))
 	}
-	if st := dryRunValidation(ctx, catalogState, opts); st != nil {
-		return nil, st.Err()
+	input, err := buildDescribeInstancesInput(&SetAttributes{}, true)
+	if err != nil {
+		return nil, status.Errorf(codes.Unknown, errBuildDescribeInstancesInput, err)
+	}
+	// Run a DescribeInstances request with DryRun set to true to ensure
+	// we can interact with AWS resources as expected.
+	if _, err := checkHosts(ctx, catalogState, input, opts, catalogAttributes.TargetAccount); err != nil {
+		if _, ok := status.FromError(err); ok {
+			return nil, err
+		}
+		return nil, fmt.Errorf(errDryRunFailed, err)
 	}
 
 	persistedProto, err := catalogState.toProto()
 	if err != nil {
-		return nil, errors.BadRequestStatus(err.Error())
+		return nil, errors.BadRequestStatusf("error converting persisted state to proto: %s", err)
 	}
 
 	return &pb.OnCreateCatalogResponse{
@@ -138,7 +168,7 @@ func (p *HostPlugin) OnUpdateCatalog(ctx context.Context, req *pb.OnUpdateCatalo
 		oldCatalogAttributes.DualStack,
 		p.testCredStateOpts...)
 	if err != nil {
-		return nil, errors.BadRequestStatus("error loading persisted state: %s", err)
+		return nil, errors.BadRequestStatusf("error loading persisted state: %s", err)
 	}
 
 	// Verify the incoming credentials are valid and return any errors to the
@@ -161,22 +191,41 @@ func (p *HostPlugin) OnUpdateCatalog(ctx context.Context, req *pb.OnUpdateCatalo
 			}, p.testCredStateOpts...)...,
 		)
 		if err != nil {
-			return nil, errors.BadRequestStatus("error setting up new credential persisted state: %s", err)
+			return nil, errors.BadRequestStatusf("error setting up new credential persisted state: %s", err)
 		}
+
+		// Validate assumed-role credentials when the role_arn changes so that
+		// an invalid ARN is caught before replacing the existing credential state.
+		if credential.GetCredentialType(newCredState.CredentialsConfig) == credential.DynamicAWS {
+			if err := newCredState.ValidateCreds(ctx); err != nil {
+				return nil, err
+			}
+		}
+
 		newCatalogState, err := newAwsCatalogPersistedState(
 			append([]awsCatalogPersistedStateOption{
 				withCredentials(newCredState),
 			}, p.testCatalogStateOpts...)...,
 		)
 		if err != nil {
-			return nil, errors.BadRequestStatus("error loading persisted state: %s", err)
+			return nil, errors.BadRequestStatusf("error loading persisted state: %s", err)
 		}
+
 		opts := []ec2Option{}
 		if newCatalogAttributes.DualStack {
 			opts = append(opts, WithDualStack(newCatalogAttributes.DualStack))
 		}
-		if st := dryRunValidation(ctx, newCatalogState, opts); st != nil {
-			return nil, st.Err()
+		input, err := buildDescribeInstancesInput(&SetAttributes{}, true)
+		if err != nil {
+			return nil, status.Errorf(codes.Unknown, errBuildDescribeInstancesInput, err)
+		}
+		// Run a DescribeInstances request with DryRun set to true to ensure
+		// we can interact with AWS resources as expected.
+		if _, err := checkHosts(ctx, newCatalogState, input, opts, newCatalogAttributes.TargetAccount); err != nil {
+			if _, ok := status.FromError(err); ok {
+				return nil, err
+			}
+			return nil, fmt.Errorf(errDryRunFailed, err)
 		}
 
 		// Replace the existing credential state.
@@ -213,21 +262,29 @@ func (p *HostPlugin) OnUpdateCatalog(ctx context.Context, req *pb.OnUpdateCatalo
 		}, p.testCatalogStateOpts...)...,
 	)
 	if err != nil {
-		return nil, errors.BadRequestStatus("error loading persisted state: %s", err)
+		return nil, errors.BadRequestStatusf("error loading persisted state: %s", err)
 	}
 
-	// perform dry run to ensure we can interact with AWS as expected.
 	opts := []ec2Option{}
 	if newCatalogAttributes.DualStack {
 		opts = append(opts, WithDualStack(newCatalogAttributes.DualStack))
 	}
-	if st := dryRunValidation(ctx, catalogState, opts); st != nil {
-		return nil, st.Err()
+	input, err := buildDescribeInstancesInput(&SetAttributes{}, true)
+	if err != nil {
+		return nil, status.Errorf(codes.Unknown, errBuildDescribeInstancesInput, err)
+	}
+	// Run a DescribeInstances request with DryRun set to true to ensure
+	// we can interact with AWS resources as expected.
+	if _, err := checkHosts(ctx, catalogState, input, opts, newCatalogAttributes.TargetAccount); err != nil {
+		if _, ok := status.FromError(err); ok {
+			return nil, err
+		}
+		return nil, fmt.Errorf(errDryRunFailed, err)
 	}
 
 	persistedProto, err := catalogState.toProto()
 	if err != nil {
-		return nil, errors.BadRequestStatus(err.Error())
+		return nil, errors.BadRequestStatusf("error converting persisted state to proto: %s", err)
 	}
 
 	return &pb.OnUpdateCatalogResponse{
@@ -264,7 +321,7 @@ func (p *HostPlugin) OnDeleteCatalog(ctx context.Context, req *pb.OnDeleteCatalo
 		catalogAttributes.DualStack,
 		p.testCredStateOpts...)
 	if err != nil {
-		return nil, errors.BadRequestStatus("error loading persisted state: %s", err)
+		return nil, errors.BadRequestStatusf("error loading persisted state: %s", err)
 	}
 
 	_, err = newAwsCatalogPersistedState(
@@ -273,7 +330,7 @@ func (p *HostPlugin) OnDeleteCatalog(ctx context.Context, req *pb.OnDeleteCatalo
 		}, p.testCatalogStateOpts...)...,
 	)
 	if err != nil {
-		return nil, errors.BadRequestStatus("error loading persisted state: %s", err)
+		return nil, errors.BadRequestStatusf("error loading persisted state: %s", err)
 	}
 
 	// try to delete static credentials
@@ -341,7 +398,7 @@ func (p *HostPlugin) OnCreateSet(ctx context.Context, req *pb.OnCreateSetRequest
 		catalogAttributes.DualStack,
 		p.testCredStateOpts...)
 	if err != nil {
-		return nil, errors.BadRequestStatus("error loading persisted state: %s", err)
+		return nil, errors.BadRequestStatusf("error loading persisted state: %s", err)
 	}
 
 	catalogState, err := newAwsCatalogPersistedState(
@@ -350,7 +407,7 @@ func (p *HostPlugin) OnCreateSet(ctx context.Context, req *pb.OnCreateSetRequest
 		}, p.testCatalogStateOpts...)...,
 	)
 	if err != nil {
-		return nil, errors.BadRequestStatus("error loading persisted state: %s", err)
+		return nil, errors.BadRequestStatusf("error loading persisted state: %s", err)
 	}
 
 	set := req.GetSet()
@@ -366,18 +423,23 @@ func (p *HostPlugin) OnCreateSet(ctx context.Context, req *pb.OnCreateSetRequest
 		return nil, err
 	}
 
-	describeInstanceFilters, err := buildFilters(setAttrs)
-	if err != nil {
-		return nil, errors.BadRequestStatus("error building set filters: %s", err)
-	}
-
 	opts := []ec2Option{}
 	if catalogAttributes.DualStack {
 		opts = append(opts, WithDualStack(catalogAttributes.DualStack))
 	}
-	if st := dryRunValidation(ctx, catalogState, opts, describeInstanceFilters...); st != nil {
-		return nil, st.Err()
+	input, err := buildDescribeInstancesInput(setAttrs, true)
+	if err != nil {
+		return nil, status.Errorf(codes.Unknown, errBuildDescribeInstancesInput, err)
 	}
+	// Run a DescribeInstances request with DryRun set to true to ensure
+	// we can interact with AWS resources as expected.
+	if _, err := checkHosts(ctx, catalogState, input, opts, catalogAttributes.TargetAccount); err != nil {
+		if _, ok := status.FromError(err); ok {
+			return nil, err
+		}
+		return nil, fmt.Errorf(errDryRunFailed, err)
+	}
+
 	return &pb.OnCreateSetResponse{}, nil
 }
 
@@ -404,7 +466,7 @@ func (p *HostPlugin) OnUpdateSet(ctx context.Context, req *pb.OnUpdateSetRequest
 		catalogAttributes.DualStack,
 		p.testCredStateOpts...)
 	if err != nil {
-		return nil, errors.BadRequestStatus("error loading persisted state: %s", err)
+		return nil, errors.BadRequestStatusf("error loading persisted state: %s", err)
 	}
 
 	catalogState, err := newAwsCatalogPersistedState(
@@ -413,7 +475,7 @@ func (p *HostPlugin) OnUpdateSet(ctx context.Context, req *pb.OnUpdateSetRequest
 		}, p.testCatalogStateOpts...)...,
 	)
 	if err != nil {
-		return nil, errors.BadRequestStatus("error loading persisted state: %s", err)
+		return nil, errors.BadRequestStatusf("error loading persisted state: %s", err)
 	}
 
 	// As with catalog, we don't need to really look at the old host
@@ -431,17 +493,21 @@ func (p *HostPlugin) OnUpdateSet(ctx context.Context, req *pb.OnUpdateSetRequest
 		return nil, err
 	}
 
-	describeInstanceFilters, err := buildFilters(setAttrs)
-	if err != nil {
-		return nil, errors.BadRequestStatus("error building set filters: %s", err)
-	}
-
 	opts := []ec2Option{}
 	if catalogAttributes.DualStack {
 		opts = append(opts, WithDualStack(catalogAttributes.DualStack))
 	}
-	if st := dryRunValidation(ctx, catalogState, opts, describeInstanceFilters...); st != nil {
-		return nil, st.Err()
+	input, err := buildDescribeInstancesInput(setAttrs, true)
+	if err != nil {
+		return nil, status.Errorf(codes.Unknown, errBuildDescribeInstancesInput, err)
+	}
+	// Run a DescribeInstances request with DryRun set to true to ensure
+	// we can interact with AWS resources as expected.
+	if _, err := checkHosts(ctx, catalogState, input, opts, catalogAttributes.TargetAccount); err != nil {
+		if _, ok := status.FromError(err); ok {
+			return nil, err
+		}
+		return nil, fmt.Errorf(errDryRunFailed, err)
 	}
 
 	return &pb.OnUpdateSetResponse{}, nil
@@ -477,7 +543,7 @@ func (p *HostPlugin) ListHosts(ctx context.Context, req *pb.ListHostsRequest) (*
 		catalogAttributes.DualStack,
 		p.testCredStateOpts...)
 	if err != nil {
-		return nil, errors.BadRequestStatus("error loading persisted state: %s", err)
+		return nil, errors.BadRequestStatusf("error loading persisted state: %s", err)
 	}
 
 	catalogState, err := newAwsCatalogPersistedState(
@@ -486,7 +552,7 @@ func (p *HostPlugin) ListHosts(ctx context.Context, req *pb.ListHostsRequest) (*
 		}, p.testCatalogStateOpts...)...,
 	)
 	if err != nil {
-		return nil, errors.BadRequestStatus("error loading persisted state: %s", err)
+		return nil, errors.BadRequestStatusf("error loading persisted state: %s", err)
 	}
 
 	sets := req.GetSets()
@@ -495,13 +561,6 @@ func (p *HostPlugin) ListHosts(ctx context.Context, req *pb.ListHostsRequest) (*
 	}
 
 	// Build all the queries in advance.
-	type hostSetQuery struct {
-		Id          string
-		Input       *ec2.DescribeInstancesInput
-		Output      *ec2.DescribeInstancesOutput
-		OutputHosts []*pb.ListHostsResponseHost
-	}
-
 	queries := make([]hostSetQuery, len(sets))
 	for i, set := range sets {
 		// Validate Id since we use it in output
@@ -510,7 +569,7 @@ func (p *HostPlugin) ListHosts(ctx context.Context, req *pb.ListHostsRequest) (*
 		}
 
 		if set.GetAttributes() == nil {
-			return nil, errors.BadRequestStatus("set %s attributes are required", set.GetId())
+			return nil, errors.BadRequestStatusf("set %s attributes are required", set.GetId())
 		}
 		setAttrs, err := getSetAttributes(set.GetAttributes())
 		if err != nil {
@@ -519,7 +578,7 @@ func (p *HostPlugin) ListHosts(ctx context.Context, req *pb.ListHostsRequest) (*
 
 		input, err := buildDescribeInstancesInput(setAttrs, false)
 		if err != nil {
-			return nil, errors.BadRequestStatus("error building DescribeInstances parameters for host set id %q: %s", set.GetId(), err)
+			return nil, errors.BadRequestStatusf("error building DescribeInstances parameters for host set id %q: %s", set.GetId(), err)
 		}
 		queries[i] = hostSetQuery{
 			Id:    set.GetId(),
@@ -531,28 +590,34 @@ func (p *HostPlugin) ListHosts(ctx context.Context, req *pb.ListHostsRequest) (*
 	if catalogAttributes.DualStack {
 		opts = append(opts, WithDualStack(catalogAttributes.DualStack))
 	}
-	ec2Client, err := catalogState.EC2Client(ctx, opts...)
-	if err != nil {
-		return nil, errors.BadRequestStatus("error getting EC2 client: %s", err)
-	}
 
 	// Run all queries now and assemble output.
 	var maxLen int
 	for i, query := range queries {
-		output, err := ec2Client.DescribeInstances(ctx, query.Input)
+		output, err := checkHosts(ctx, catalogState, query.Input, opts, catalogAttributes.TargetAccount)
 		if err != nil {
-			return nil, errors.BadRequestStatus("error running DescribeInstances for host set id %q: %s", query.Id, err)
+			// Mapped AWS failures are already gRPC statuses from checkHosts.
+			if _, ok := status.FromError(err); ok {
+				return nil, err
+			}
+			if catalogAttributes.TargetAccount != nil {
+				return nil, status.Errorf(codes.Unknown, "unable to list hosts for host set %q: %v", query.Id, err)
+			}
+			return nil, status.Errorf(codes.Unknown, "error retrieving host results for host set id %q: %v", query.Id, err)
 		}
 
 		queries[i].Output = output
+		if output == nil {
+			continue
+		}
 
 		// Process the output here, we will normalize this into a single
 		// set of hosts afterwards (possibly removing duplicates).
 		for _, reservation := range output.Reservations {
 			for _, instance := range reservation.Instances {
-				host, err := awsInstanceToHost(instance)
+				host, err := awsInstanceToHost(instance, catalogAttributes)
 				if err != nil {
-					return nil, errors.BadRequestStatus("error processing host results for host set id %q: %s", query.Id, err)
+					return nil, status.Errorf(codes.Unknown, "error processing host results for host set id %q: %v", query.Id, err)
 				}
 
 				queries[i].OutputHosts = append(queries[i].OutputHosts, host)
@@ -601,11 +666,11 @@ func buildFilters(attrs *SetAttributes) ([]types.Filter, error) {
 		splitFilter := strings.Split(filterAttr, "=")
 		switch {
 		case len(splitFilter) != 2:
-			return nil, fmt.Errorf("expected filter %q to contain a single equal sign", filterAttr)
+			return nil, errors.BadRequestStatusf("expected filter %q to contain a single equal sign", filterAttr)
 		case len(splitFilter[0]) == 0:
-			return nil, fmt.Errorf("filter %q contains an empty filter key", filterAttr)
+			return nil, errors.BadRequestStatusf("filter %q contains an empty filter key", filterAttr)
 		case len(splitFilter[1]) == 0:
-			return nil, fmt.Errorf("filter %q contains an empty value", filterAttr)
+			return nil, errors.BadRequestStatusf("filter %q contains an empty value", filterAttr)
 		}
 
 		filterKey, filterValue := splitFilter[0], splitFilter[1]
@@ -634,9 +699,13 @@ func buildFilters(attrs *SetAttributes) ([]types.Filter, error) {
 }
 
 func buildDescribeInstancesInput(attrs *SetAttributes, dryRun bool) (*ec2.DescribeInstancesInput, error) {
+	if attrs == nil {
+		attrs = &SetAttributes{}
+	}
+
 	filters, err := buildFilters(attrs)
 	if err != nil {
-		return nil, fmt.Errorf("error building filters: %w", err)
+		return nil, err
 	}
 
 	return &ec2.DescribeInstancesInput{
@@ -648,10 +717,13 @@ func buildDescribeInstancesInput(attrs *SetAttributes, dryRun bool) (*ec2.Descri
 // awsInstanceToHost processes data from an ec2.Instance and returns
 // a ListHostsResponseHost with the ID and network addresses
 // populated.
-func awsInstanceToHost(instance types.Instance) (*pb.ListHostsResponseHost, error) {
+func awsInstanceToHost(instance types.Instance, catalogAttributes *CatalogAttributes) (*pb.ListHostsResponseHost, error) {
 	if aws.ToString(instance.InstanceId) == "" {
 		return nil, fmt.Errorf("response integrity error: missing instance id")
 	}
+	if catalogAttributes == nil {
+		return nil, fmt.Errorf("response integrity error: missing catalog attributes")
+	}
 
 	result := new(pb.ListHostsResponseHost)
 
@@ -666,10 +738,16 @@ func awsInstanceToHost(instance types.Instance) (*pb.ListHostsResponseHost, erro
 		}
 	}
 
-	result.IpAddresses = appendDistinct(result.IpAddresses, instance.PrivateIpAddress, instance.PublicIpAddress)
+	// First let's get the instance's Private IPv4/DNS, Public IPv4/DNS, and IPv6 addresses
+	result.IpAddresses = appendDistinct(result.IpAddresses, instance.PrivateIpAddress, instance.PublicIpAddress, instance.Ipv6Address)
 	result.DnsNames = appendDistinct(result.DnsNames, instance.PrivateDnsName, instance.PublicDnsName)
 
-	// Now go through all of the interfaces and log the IP address of
+	if catalogAttributes.InstanceAddressesOnly {
+		// return early as we already have the instance addresses
+		return result, nil
+	}
+
+	// Now go through all of the interfaces and sync the IP address of
 	// every interface.
 	for _, iface := range instance.NetworkInterfaces {
 		// Populate default IP addresses/DNS name similar to how we do
@@ -698,26 +776,121 @@ func awsInstanceToHost(instance types.Instance) (*pb.ListHostsResponseHost, erro
 	return result, nil
 }
 
-// dryRunValidation performs an AWS DescribeInstances call to verify the state's
-// credentials, the host listing functionality as well as the filters, if any
-// are passed in. This function can therefore be used for both host catalog and
-// host set validation.
-func dryRunValidation(ctx context.Context, state *awsCatalogPersistedState, ec2Opts []ec2Option, filters ...types.Filter) *status.Status {
-	if state == nil {
-		return status.New(codes.InvalidArgument, "persisted state is required")
+func checkHosts(ctx context.Context,
+	principalCatalogState *awsCatalogPersistedState,
+	input *ec2.DescribeInstancesInput,
+	opts []ec2Option,
+	target *credential.CredentialAttributes,
+) (*ec2.DescribeInstancesOutput, error) {
+	if principalCatalogState == nil {
+		return nil, fmt.Errorf("unable to create EC2 client from catalog state")
 	}
 
-	ec2Client, err := state.EC2Client(ctx, ec2Opts...)
+	var ec2Client EC2API
+	var err error
+	if target == nil {
+		// use the principal account to execute the DescribeInstances command
+		ec2Client, err = principalCatalogState.EC2Client(ctx, opts...)
 		if err != nil {
-		return status.New(codes.InvalidArgument, fmt.Sprintf("error getting EC2 client: %s", err))
+			if st, _ := errors.ParseAWSError("EC2 client setup", err); st.Code() != codes.Unknown {
+				return nil, st.Err()
 			}
-
-	_, err = ec2Client.DescribeInstances(ctx, &ec2.DescribeInstancesInput{Filters: filters})
+			return nil, err
+		}
+	} else {
+		// use the target account to execute the DescribeInstances command
+		ec2Client, err = ec2ClientForTarget(ctx, principalCatalogState, target, opts)
 		if err != nil {
-		return status.New(codes.FailedPrecondition, fmt.Sprintf("aws describe instances failed: %s", err))
+			if _, ok := status.FromError(err); ok {
+				return nil, err
+			}
+			return nil, fmt.Errorf("EC2 client setup failed for target account: %w", err)
+		}
 	}
 
-	return nil
+	output, err := ec2Client.DescribeInstances(ctx, input)
+	if err != nil {
+		if errors.IsDryRunSuccess(err) {
+			// DryRunOperation: request would have succeeded; not a failure.
+			return nil, nil
+		}
+		if st, _ := errors.ParseAWSError("DescribeInstances", err); st.Code() != codes.Unknown {
+			return nil, st.Err()
+		}
+		if target != nil {
+			return nil, fmt.Errorf("EC2 DescribeInstances failed for target account: %w", err)
+		}
+		return nil, err
+	}
+
+	return output, nil
+}
+
+// ec2ClientForTarget builds an EC2 client to query the target account.
+// The hop is a continuation of the principal session: STS AssumeRole is called
+// as the principal to get to the target, then EC2 uses the resulting temporary credentials.
+// This is not a second worker-level credential chain on the target attributes.
+func ec2ClientForTarget(
+	ctx context.Context,
+	principalCatalogState *awsCatalogPersistedState,
+	target *credential.CredentialAttributes,
+	opts []ec2Option) (EC2API, error) {
+	// Reuse the principal SDK config (HTTP client, retries, logger, and the
+	// principal identity).
+	principalCfg, err := principalCatalogState.GenerateCredentialChain(ctx)
+	if err != nil {
+		if st, _ := errors.ParseAWSError("EC2 client setup for target account", err); st.Code() != codes.Unknown {
+			return nil, st.Err()
+		}
+		return nil, fmt.Errorf("principal AWS configuration could not be loaded: %w", err)
+	}
+	if principalCfg == nil {
+		return nil, fmt.Errorf("nil principal AWS configuration while configuring EC2 client for target account")
+	}
+
+	// STS must run as the principal so the target role's trust policy sees that
+	// identity, not the worker's. Session name, external ID, and tags are
+	// forwarded from attrs when set so the AssumeRole matches the target role's configuration.
+	stsClient := sts.NewFromConfig(*principalCfg)
+	provider := stscreds.NewAssumeRoleProvider(stsClient, target.RoleArn, func(o *stscreds.AssumeRoleOptions) {
+		if target.RoleSessionName != "" {
+			o.RoleSessionName = target.RoleSessionName
+		}
+		if target.RoleExternalId != "" {
+			o.ExternalID = &target.RoleExternalId
+		}
+		for k, v := range target.RoleTags {
+			o.Tags = append(o.Tags, stsTypes.Tag{
+				Key:   aws.String(k),
+				Value: aws.String(v),
+			})
+		}
+	})
+
+	// Same worker SDK environment as the principal; only identity and region change.
+	targetCfg := principalCfg.Copy()
+	targetCfg.Credentials = aws.NewCredentialsCache(provider)
+	if target.Region != "" {
+		targetCfg.Region = target.Region
+	}
+
+	parsed, err := getOpts(opts...)
+	if err != nil {
+		return nil, fmt.Errorf("EC2 client options are invalid: %w", err)
+	}
+	// Dual-stack is the worker's path to AWS endpoints, not per-account. Apply
+	// it on the hopped client the same way EC2Client does for the principal.
+	var ec2Opts []func(*ec2.Options)
+	if parsed.withDualStack {
+		ec2Opts = append(ec2Opts, ec2.WithEndpointResolverV2(&endpointResolver{
+			dualStack: parsed.withDualStack,
+		}))
+	}
+
+	if principalCatalogState.testEC2APIFunc != nil {
+		return principalCatalogState.testEC2APIFunc(targetCfg)
+	}
+	return ec2.NewFromConfig(targetCfg, ec2Opts...), nil
 }
 
 // appendDistinct will append the elements to the slice

plugin/service/host/state.go

@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2021, 2026
 // SPDX-License-Identifier: MPL-2.0
 
 package host
@@ -11,8 +11,8 @@ import (
 	"github.com/aws/aws-sdk-go-v2/aws"
 	"github.com/aws/aws-sdk-go-v2/service/ec2"
 	smithyEndpoints "github.com/aws/smithy-go/endpoints"
-	"github.com/hashicorp/boundary-plugin-aws/internal/credential"
-	pb "github.com/hashicorp/boundary/sdk/pbs/plugin"
+	"repo.anhonesthost.net/CyberCoveLLC/threshold-plugin-aws/internal/credential"
+	pb "repo.anhonesthost.net/CyberCoveLLC/threshold/sdk/pbs/plugin"
 	"google.golang.org/protobuf/types/known/structpb"
 )
 

plugin/service/host/state_test.go

@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2021, 2026
 // SPDX-License-Identifier: MPL-2.0
 
 package host
@@ -7,7 +7,7 @@ import (
 	"context"
 	"testing"
 
-	"github.com/hashicorp/boundary-plugin-aws/internal/credential"
+	"repo.anhonesthost.net/CyberCoveLLC/threshold-plugin-aws/internal/credential"
 	"github.com/hashicorp/go-secure-stdlib/awsutil/v2"
 	"github.com/stretchr/testify/require"
 )

plugin/service/host/testing.go

@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2021, 2026
 // SPDX-License-Identifier: MPL-2.0
 
 package host
@@ -22,11 +22,17 @@ const (
 type testMockEC2State struct {
 	DescribeInstancesCalled      bool
 	DescribeInstancesInputParams *ec2.DescribeInstancesInput
+	DescribeInstancesCallCount   int
+	DescribeInstancesInputs      []*ec2.DescribeInstancesInput
+	ClientRegions                []string
 }
 
 func (s *testMockEC2State) Reset() {
 	s.DescribeInstancesCalled = false
 	s.DescribeInstancesInputParams = nil
+	s.DescribeInstancesCallCount = 0
+	s.DescribeInstancesInputs = nil
+	s.ClientRegions = nil
 }
 
 type testMockEC2 struct {
@@ -72,7 +78,10 @@ func newTestMockEC2(state *testMockEC2State, opts ...testMockEC2Option) ec2APIFu
 			if cfg.Region != "" {
 				m.Region = cfg.Region
 			}
+		}
 
+		if state != nil {
+			state.ClientRegions = append(state.ClientRegions, m.Region)
 		}
 
 		return m, nil
@@ -83,6 +92,8 @@ func (m *testMockEC2) DescribeInstances(ctx context.Context, input *ec2.Describe
 	if m.State != nil {
 		m.State.DescribeInstancesCalled = true
 		m.State.DescribeInstancesInputParams = input
+		m.State.DescribeInstancesCallCount++
+		m.State.DescribeInstancesInputs = append(m.State.DescribeInstancesInputs, input)
 	}
 
 	if m.DescribeInstancesError != nil {

plugin/service/storage/attributes.go

@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2021, 2026
 // SPDX-License-Identifier: MPL-2.0
 
 package storage
@@ -6,9 +6,9 @@ package storage
 import (
 	"fmt"
 
-	cred "github.com/hashicorp/boundary-plugin-aws/internal/credential"
-	"github.com/hashicorp/boundary-plugin-aws/internal/errors"
-	"github.com/hashicorp/boundary-plugin-aws/internal/values"
+	cred "repo.anhonesthost.net/CyberCoveLLC/threshold-plugin-aws/internal/credential"
+	"repo.anhonesthost.net/CyberCoveLLC/threshold-plugin-aws/internal/errors"
+	"repo.anhonesthost.net/CyberCoveLLC/threshold-plugin-aws/internal/values"
 	"google.golang.org/protobuf/types/known/structpb"
 )
 

plugin/service/storage/attributes_test.go

@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2021, 2026
 // SPDX-License-Identifier: MPL-2.0
 
 package storage
@@ -6,8 +6,8 @@ package storage
 import (
 	"testing"
 
-	cred "github.com/hashicorp/boundary-plugin-aws/internal/credential"
-	pb "github.com/hashicorp/boundary/sdk/pbs/plugin"
+	cred "repo.anhonesthost.net/CyberCoveLLC/threshold-plugin-aws/internal/credential"
+	pb "repo.anhonesthost.net/CyberCoveLLC/threshold/sdk/pbs/plugin"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
 	"google.golang.org/grpc/codes"

plugin/service/storage/const.go

@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2021, 2026
 // SPDX-License-Identifier: MPL-2.0
 
 package storage
@@ -11,5 +11,5 @@ const (
 	ConstAwsDualStack = "dual_stack"
 
 	// defaultStreamChunkSize is the recommened chunk size for sending data through a stream
-	defaultStreamChunkSize = 65536 // 64 KiB
+	defaultStreamChunkSize = 1 << 20 // 1 MiB
 )

plugin/service/storage/error.go

@@ -1,11 +1,11 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2021, 2026
 // SPDX-License-Identifier: MPL-2.0
 
 package storage
 
 import (
-	"github.com/hashicorp/boundary-plugin-aws/internal/errors"
-	pb "github.com/hashicorp/boundary/sdk/pbs/plugin"
+	"repo.anhonesthost.net/CyberCoveLLC/threshold-plugin-aws/internal/errors"
+	pb "repo.anhonesthost.net/CyberCoveLLC/threshold/sdk/pbs/plugin"
 	"google.golang.org/grpc/codes"
 	"google.golang.org/grpc/status"
 )
@@ -40,6 +40,10 @@ func setStatePermission(req any, permission *pb.Permission) *pb.StorageBucketCre
 		state.State.Delete = permission
 	case *pb.DeleteObjectsRequest:
 		state.State.Delete = permission
+	case pb.ListObjectsRequest:
+		state.State.Read = permission
+	case *pb.ListObjectsRequest:
+		state.State.Read = permission
 	}
 	return state
 }

plugin/service/storage/error_test.go

@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2021, 2026
 // SPDX-License-Identifier: MPL-2.0
 
 package storage
@@ -6,8 +6,8 @@ package storage
 import (
 	"testing"
 
-	"github.com/hashicorp/boundary-plugin-aws/internal/errors"
-	pb "github.com/hashicorp/boundary/sdk/pbs/plugin"
+	"repo.anhonesthost.net/CyberCoveLLC/threshold-plugin-aws/internal/errors"
+	pb "repo.anhonesthost.net/CyberCoveLLC/threshold/sdk/pbs/plugin"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
 	"google.golang.org/grpc/codes"

plugin/service/storage/plugin.go

@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2021, 2026
 // SPDX-License-Identifier: MPL-2.0
 
 package storage
@@ -9,29 +9,41 @@ import (
 	"context"
 	"crypto/sha256"
 	"encoding/base64"
+	stderr "errors"
 	"fmt"
 	"io"
 	"os"
 	"path"
 	"strings"
+	"sync"
 
 	"github.com/aws/aws-sdk-go-v2/aws"
 	"github.com/aws/aws-sdk-go-v2/service/s3"
 	"github.com/aws/aws-sdk-go-v2/service/s3/types"
 	"github.com/google/uuid"
-	cred "github.com/hashicorp/boundary-plugin-aws/internal/credential"
-	"github.com/hashicorp/boundary-plugin-aws/internal/errors"
-	"github.com/hashicorp/boundary/sdk/pbs/controller/api/resources/storagebuckets"
-	pb "github.com/hashicorp/boundary/sdk/pbs/plugin"
+	cred "repo.anhonesthost.net/CyberCoveLLC/threshold-plugin-aws/internal/credential"
+	"repo.anhonesthost.net/CyberCoveLLC/threshold-plugin-aws/internal/errors"
+	"repo.anhonesthost.net/CyberCoveLLC/threshold/sdk/pbs/controller/api/resources/storagebuckets"
+	pb "repo.anhonesthost.net/CyberCoveLLC/threshold/sdk/pbs/plugin"
 	"github.com/hashicorp/go-multierror"
+	"github.com/hashicorp/go-secure-stdlib/parseutil"
 	"google.golang.org/grpc/codes"
 	"google.golang.org/grpc/status"
+	"google.golang.org/protobuf/types/known/structpb"
 	"google.golang.org/protobuf/types/known/timestamppb"
 )
 
 // Ensure that we are implementing StoragePluginServiceServer
 var _ pb.StoragePluginServiceServer = (*StoragePlugin)(nil)
 
+// clientCache caches previously initialized S3API clients created with a RoleARN attribute.
+type clientCache struct {
+	// cache is a map of cached s3 clients. The key of the map
+	// is the public id of the storage bucket
+	cache map[string]S3API
+	sync.RWMutex
+}
+
 // StoragePlugin implements the StoragePluginServiceServer interface for the
 // AWS storage service plugin.
 type StoragePlugin struct {
@@ -42,6 +54,137 @@ type StoragePlugin struct {
 
 	// testStorageStateOpts are passed in to the stored state to control test behavior
 	testStorageStateOpts []awsStoragePersistedStateOption
+
+	clients *clientCache
+}
+
+// New creates a new StoragePlugin
+func New() *StoragePlugin {
+	c := &clientCache{
+		cache: make(map[string]S3API),
+	}
+	return &StoragePlugin{
+		clients: c,
+	}
+}
+
+// getClient returns an S3API client for the given storage bucket id.
+func (p *StoragePlugin) getClient(ctx context.Context,
+	storageBucketId string,
+	storageState *awsStoragePersistedState,
+	opt ...s3Option) (S3API, error) {
+	if storageBucketId == "" {
+		// No storage bucket ID to key cache on, create new client and return
+		client, err := storageState.s3Client(ctx, opt...)
+		if err != nil {
+			return nil, errors.BadRequestStatusf("error creating S3 client: %s", err)
+		}
+		return client, nil
+	}
+
+	opts, err := getOpts(opt...)
+	if err != nil {
+		return nil, fmt.Errorf("error parsing options in cache: %w", err)
+	}
+
+	if opts.withCacheRefresh {
+		// Forced cache refresh
+		p.clients.Lock()
+		defer p.clients.Unlock()
+		client, err := storageState.s3Client(ctx, opt...)
+		if err != nil {
+			return nil, errors.BadRequestStatusf("error creating S3 client: %s", err)
+		}
+		p.clients.cache[storageBucketId] = client
+		return client, nil
+	}
+
+	p.clients.RLock()
+	client, ok := p.clients.cache[storageBucketId]
+	p.clients.RUnlock()
+
+	if !ok || client.Credentials().Expired() {
+		// We got a cache miss or the credentials has expired, time to refresh
+		p.clients.Lock()
+		defer p.clients.Unlock()
+
+		// Check cache again in case another caller updated it since we got the lock
+		client, ok = p.clients.cache[storageBucketId]
+		if ok && !client.Credentials().Expired() {
+			// Got a cache hit with valid credentials, return cached client
+			return client, nil
+		}
+
+		// Create new client and cache it
+		var err error
+		client, err = storageState.s3Client(ctx, opt...)
+		if err != nil {
+			return nil, errors.BadRequestStatusf("error creating S3 client: %s", err)
+		}
+		p.clients.cache[storageBucketId] = client
+	}
+	return client, nil
+}
+
+type s3Caller func(client S3API) (any, error)
+
+// call gets the s3client and passes it to the s3caller function, if a permission error is returned
+// it forces a cache refresh and tries again.
+func (p *StoragePlugin) call(
+	ctx context.Context,
+	fn s3Caller,
+	storageBucketId string,
+	storageState *awsStoragePersistedState,
+	opts ...s3Option) (any, error) {
+
+	s3Client, err := p.getClient(ctx, storageBucketId, storageState, opts...)
+	if err != nil {
+		return nil, errors.BadRequestStatusf("error getting S3 client: %s", err)
+	}
+	firstAttempt := true
+	for {
+		resp, err := fn(s3Client)
+		if err != nil {
+			st, _ := errors.ParseAWSError("", err)
+			if st.Code() == codes.PermissionDenied && firstAttempt {
+				// We got a permission error, this is the first time so refresh cache and try again
+				firstAttempt = false
+				opts = append(opts, WithCacheRefresh(true))
+				s3Client, err = p.getClient(ctx, storageBucketId, storageState, opts...)
+				if err != nil {
+					return nil, errors.BadRequestStatusf("error refreshing S3 client: %s", err)
+				}
+				continue
+			}
+			return nil, err
+		}
+		return resp, nil
+	}
+}
+
+// NormalizeStorageBucketData is called by boundary before calling OnCreate or OnUpdate
+//
+// aws storage supports a total of 8 attributes, 6 as part of credential.CredentialAttributes
+// and 2 more from storage.StorageAttributes. of these, only endpoint_url is normalized.
+func (sp *StoragePlugin) NormalizeStorageBucketData(ctx context.Context, req *pb.NormalizeStorageBucketDataRequest) (*pb.NormalizeStorageBucketDataResponse, error) {
+	sa, err := getStorageAttributes(req.GetAttributes())
+	if err != nil {
+		return nil, err
+	}
+
+	fields := req.GetAttributes().GetFields()
+	if _, ok := fields[ConstAwsEndpointUrl]; ok {
+		if sa.EndpointUrl, err = parseutil.NormalizeAddr(sa.EndpointUrl); err != nil {
+			return nil, status.New(codes.InvalidArgument, fmt.Sprintf("failed to normalize provided %s: %s", ConstAwsEndpointUrl, err.Error())).Err()
+		}
+		fields[ConstAwsEndpointUrl] = structpb.NewStringValue(sa.EndpointUrl)
+	}
+
+	return &pb.NormalizeStorageBucketDataResponse{
+		Attributes: &structpb.Struct{
+			Fields: fields,
+		},
+	}, nil
 }
 
 // OnCreateStorageBucket is called when a storage bucket is created.
@@ -76,7 +219,7 @@ func (p *StoragePlugin) OnCreateStorageBucket(ctx context.Context, req *pb.OnCre
 		}, p.testCredStateOpts...)...,
 	)
 	if err != nil {
-		return nil, errors.BadRequestStatus("error setting up persisted state: %s", err)
+		return nil, errors.BadRequestStatusf("error setting up persisted state: %s", err)
 	}
 
 	// Try to rotate AWS static credentials
@@ -92,7 +235,7 @@ func (p *StoragePlugin) OnCreateStorageBucket(ctx context.Context, req *pb.OnCre
 		}, p.testStorageStateOpts...)...,
 	)
 	if err != nil {
-		return nil, errors.BadRequestStatus("error setting up persisted state: %s", err)
+		return nil, errors.BadRequestStatusf("error setting up persisted state: %s", err)
 	}
 
 	// perform dry run to ensure we can interact with the bucket as expected.
@@ -150,7 +293,7 @@ func (p *StoragePlugin) OnUpdateStorageBucket(ctx context.Context, req *pb.OnUpd
 		oldStorageAttributes.DualStack,
 		p.testCredStateOpts...)
 	if err != nil {
-		return nil, errors.BadRequestStatus("error loading persisted state: %s", err)
+		return nil, errors.BadRequestStatusf("error loading persisted state: %s", err)
 	}
 
 	// Verify the incoming credentials are valid and return any errors to the
@@ -173,7 +316,7 @@ func (p *StoragePlugin) OnUpdateStorageBucket(ctx context.Context, req *pb.OnUpd
 			}, p.testCredStateOpts...)...,
 		)
 		if err != nil {
-			return nil, errors.BadRequestStatus("error setting up new credential persisted state: %s", err)
+			return nil, errors.BadRequestStatusf("error setting up new credential persisted state: %s", err)
 		}
 		newStorageState, err := newAwsStoragePersistedState(
 			append([]awsStoragePersistedStateOption{
@@ -181,7 +324,7 @@ func (p *StoragePlugin) OnUpdateStorageBucket(ctx context.Context, req *pb.OnUpd
 			}, p.testStorageStateOpts...)...,
 		)
 		if err != nil {
-			return nil, errors.BadRequestStatus("error loading persisted state: %s", err)
+			return nil, errors.BadRequestStatusf("error loading persisted state: %s", err)
 		}
 		if st := dryRunValidation(ctx, newStorageState, newStorageAttributes, newBucket); st != nil {
 			return nil, st.Err()
@@ -221,7 +364,7 @@ func (p *StoragePlugin) OnUpdateStorageBucket(ctx context.Context, req *pb.OnUpd
 		}, p.testStorageStateOpts...)...,
 	)
 	if err != nil {
-		return nil, errors.BadRequestStatus("error loading persisted state: %s", err)
+		return nil, errors.BadRequestStatusf("error loading persisted state: %s", err)
 	}
 
 	// perform dry run to ensure we can interact with the bucket as expected.
@@ -268,7 +411,7 @@ func (p *StoragePlugin) OnDeleteStorageBucket(ctx context.Context, req *pb.OnDel
 		storageAttributes.DualStack,
 		p.testCredStateOpts...)
 	if err != nil {
-		return nil, errors.BadRequestStatus("error loading persisted state: %s", err)
+		return nil, errors.BadRequestStatusf("error loading persisted state: %s", err)
 	}
 
 	_, err = newAwsStoragePersistedState(
@@ -277,7 +420,7 @@ func (p *StoragePlugin) OnDeleteStorageBucket(ctx context.Context, req *pb.OnDel
 		}, p.testStorageStateOpts...)...,
 	)
 	if err != nil {
-		return nil, errors.BadRequestStatus("error loading persisted state: %s", err)
+		return nil, errors.BadRequestStatusf("error loading persisted state: %s", err)
 	}
 
 	// try to delete static credentials
@@ -332,7 +475,7 @@ func (p *StoragePlugin) HeadObject(ctx context.Context, req *pb.HeadObjectReques
 		}, p.testCredStateOpts...)...,
 	)
 	if err != nil {
-		return nil, errors.BadRequestStatus("error setting up persisted state: %s", err)
+		return nil, errors.BadRequestStatusf("error setting up persisted state: %s", err)
 	}
 
 	storageState, err := newAwsStoragePersistedState(
@@ -341,7 +484,7 @@ func (p *StoragePlugin) HeadObject(ctx context.Context, req *pb.HeadObjectReques
 		}, p.testStorageStateOpts...)...,
 	)
 	if err != nil {
-		return nil, errors.BadRequestStatus("error setting up persisted state: %s", err)
+		return nil, errors.BadRequestStatusf("error setting up persisted state: %s", err)
 	}
 
 	opts := []s3Option{}
@@ -351,19 +494,20 @@ func (p *StoragePlugin) HeadObject(ctx context.Context, req *pb.HeadObjectReques
 	if storageAttributes.DualStack {
 		opts = append(opts, WithDualStack(storageAttributes.DualStack))
 	}
-	s3Client, err := storageState.S3Client(ctx, opts...)
-	if err != nil {
-		return nil, errors.BadRequestStatus("error getting S3 client: %s", err)
-	}
 
 	objectKey := path.Join(bucket.GetBucketPrefix(), req.GetKey())
-	resp, err := s3Client.HeadObject(ctx, &s3.HeadObjectInput{
+	headCall := func(s3Client S3API) (any, error) {
+		return s3Client.HeadObject(ctx, &s3.HeadObjectInput{
 			Bucket: aws.String(bucket.GetBucketName()),
 			Key:    aws.String(objectKey),
 		})
+	}
+	headResp, err := p.call(ctx, headCall, bucket.GetId(), storageState, opts...)
 	if err != nil {
 		return nil, parseS3Error("head object", err, req).Err()
 	}
+	resp := headResp.(*s3.HeadObjectOutput)
+
 	return &pb.HeadObjectResponse{
 		ContentLength: aws.ToInt64(resp.ContentLength),
 		LastModified:  timestamppb.New(*resp.LastModified),
@@ -403,7 +547,7 @@ func (p *StoragePlugin) ValidatePermissions(ctx context.Context, req *pb.Validat
 		}, p.testCredStateOpts...)...,
 	)
 	if err != nil {
-		return nil, errors.BadRequestStatus("error setting up persisted state: %s", err)
+		return nil, errors.BadRequestStatusf("error setting up persisted state: %s", err)
 	}
 
 	storageState, err := newAwsStoragePersistedState(
@@ -412,7 +556,7 @@ func (p *StoragePlugin) ValidatePermissions(ctx context.Context, req *pb.Validat
 		}, p.testStorageStateOpts...)...,
 	)
 	if err != nil {
-		return nil, errors.BadRequestStatus("error setting up persisted state: %s", err)
+		return nil, errors.BadRequestStatusf("error setting up persisted state: %s", err)
 	}
 
 	// perform dry run to ensure we can interact with the bucket as expected.
@@ -461,7 +605,7 @@ func (p *StoragePlugin) GetObject(req *pb.GetObjectRequest, stream pb.StoragePlu
 		}, p.testCredStateOpts...)...,
 	)
 	if err != nil {
-		return errors.BadRequestStatus("error setting up persisted state: %s", err)
+		return errors.BadRequestStatusf("error setting up persisted state: %s", err)
 	}
 
 	storageState, err := newAwsStoragePersistedState(
@@ -470,7 +614,7 @@ func (p *StoragePlugin) GetObject(req *pb.GetObjectRequest, stream pb.StoragePlu
 		}, p.testStorageStateOpts...)...,
 	)
 	if err != nil {
-		return errors.BadRequestStatus("error setting up persisted state: %s", err)
+		return errors.BadRequestStatusf("error setting up persisted state: %s", err)
 	}
 
 	opts := []s3Option{}
@@ -480,19 +624,19 @@ func (p *StoragePlugin) GetObject(req *pb.GetObjectRequest, stream pb.StoragePlu
 	if storageAttributes.DualStack {
 		opts = append(opts, WithDualStack(storageAttributes.DualStack))
 	}
-	s3Client, err := storageState.S3Client(stream.Context(), opts...)
-	if err != nil {
-		return errors.BadRequestStatus("error getting S3 client: %s", err)
-	}
 
 	objectKey := path.Join(bucket.GetBucketPrefix(), req.GetKey())
-	resp, err := s3Client.GetObject(stream.Context(), &s3.GetObjectInput{
+	getCall := func(s3Client S3API) (any, error) {
+		return s3Client.GetObject(stream.Context(), &s3.GetObjectInput{
 			Bucket: aws.String(bucket.GetBucketName()),
 			Key:    aws.String(objectKey),
 		})
+	}
+	getResp, err := p.call(stream.Context(), getCall, bucket.GetId(), storageState, opts...)
 	if err != nil {
 		return parseS3Error("get object", err, req).Err()
 	}
+	resp := getResp.(*s3.GetObjectOutput)
 
 	defer resp.Body.Close()
 	reader := bufio.NewReader(resp.Body)
@@ -504,13 +648,13 @@ func (p *StoragePlugin) GetObject(req *pb.GetObjectRequest, stream pb.StoragePlu
 		buffer := make([]byte, chunkSize)
 		n, err := reader.Read(buffer)
 		if err != nil && err != io.EOF {
-			return errors.UnknownStatus("error reading chunk from s3: %s", err)
+			return errors.UnknownStatusf("error reading chunk from s3: %s", err)
 		}
 		if n > 0 {
 			if err := stream.Send(&pb.GetObjectResponse{
 				FileChunk: buffer[:n],
 			}); err != nil {
-				return errors.UnknownStatus("error sending chunk to client: %s", err)
+				return errors.UnknownStatusf("error sending chunk to client: %s", err)
 			}
 		}
 		if err == io.EOF {
@@ -521,6 +665,23 @@ func (p *StoragePlugin) GetObject(req *pb.GetObjectRequest, stream pb.StoragePlu
 	return nil
 }
 
+const (
+	// multipartThreshold is the file size, in bytes, above which PutObject
+	// uploads an object using a multipart upload instead of a single PutObject
+	// request. 8 MiB matches the AWS CLI and boto3 defaults.
+	multipartThreshold = 8 * 1024 * 1024 // 8 MiB
+
+	// defaultMultipartPartSize is the default size, in bytes, of each part
+	// uploaded during a multipart upload. It is kept equal to
+	// multipartThreshold so a multipart upload always has at least two parts
+	// (S3 requires every part except the last to be at least 5 MiB).
+	defaultMultipartPartSize = 8 * 1024 * 1024 // 8 MiB
+
+	// maxMultipartParts is the maximum number of parts S3 permits for a single
+	// multipart upload.
+	maxMultipartParts = 10000
+)
+
 // PutObject is called when putting objects into an s3 bucket.
 func (p *StoragePlugin) PutObject(ctx context.Context, req *pb.PutObjectRequest) (*pb.PutObjectResponse, error) {
 	if req == nil {
@@ -575,7 +736,7 @@ func (p *StoragePlugin) PutObject(ctx context.Context, req *pb.PutObjectRequest)
 		}, p.testCredStateOpts...)...,
 	)
 	if err != nil {
-		return nil, errors.BadRequestStatus("error setting up persisted state: %s", err)
+		return nil, errors.BadRequestStatusf("error setting up persisted state: %s", err)
 	}
 
 	storageState, err := newAwsStoragePersistedState(
@@ -584,7 +745,7 @@ func (p *StoragePlugin) PutObject(ctx context.Context, req *pb.PutObjectRequest)
 		}, p.testStorageStateOpts...)...,
 	)
 	if err != nil {
-		return nil, errors.BadRequestStatus("error setting up persisted state: %s", err)
+		return nil, errors.BadRequestStatusf("error setting up persisted state: %s", err)
 	}
 
 	opts := []s3Option{}
@@ -594,10 +755,6 @@ func (p *StoragePlugin) PutObject(ctx context.Context, req *pb.PutObjectRequest)
 	if storageAttributes.DualStack {
 		opts = append(opts, WithDualStack(storageAttributes.DualStack))
 	}
-	s3Client, err := storageState.S3Client(ctx, opts...)
-	if err != nil {
-		return nil, errors.BadRequestStatus("error getting S3 client: %s", err)
-	}
 
 	hash := sha256.New()
 	if _, err := io.Copy(hash, file); err != nil {
@@ -609,33 +766,175 @@ func (p *StoragePlugin) PutObject(ctx context.Context, req *pb.PutObjectRequest)
 	if err != nil {
 		return nil, errors.UnknownStatus("failed to rewind file pointer")
 	}
-
 	objectKey := path.Join(bucket.GetBucketPrefix(), req.GetKey())
-	resp, err := s3Client.PutObject(ctx, &s3.PutObjectInput{
+
+	// decodedChecksum is the raw SHA-256 digest of the entire object. Boundary
+	// compares this byte-for-byte against the hash it computed locally before
+	// the upload, so it must always be the whole-object checksum regardless of
+	// whether a single PutObject or a multipart upload is used.
+	decodedChecksum, err := base64.StdEncoding.DecodeString(checksum)
+	if err != nil {
+		return nil, errors.UnknownStatus("failed to decode checksum value")
+	}
+
+	// for larger files, use a multipart upload instead of a single PutObject
+	// request.
+	if info.Size() > multipartThreshold {
+		partSize := int64(defaultMultipartPartSize)
+		// S3 allows at most maxMultipartParts parts per upload, so grow the
+		// part size for very large objects to stay within that limit.
+		if sz := info.Size(); sz/partSize >= maxMultipartParts {
+			partSize = (sz + maxMultipartParts - 1) / maxMultipartParts
+		}
+		if err := p.putObjectMultipart(ctx, req, storageState, bucket.GetBucketName(), objectKey, file, partSize, opts...); err != nil {
+			return nil, err
+		}
+		return &pb.PutObjectResponse{
+			ChecksumSha_256: decodedChecksum,
+		}, nil
+	}
+
+	putCall := func(s3Client S3API) (any, error) {
+		return s3Client.PutObject(ctx, &s3.PutObjectInput{
 			Bucket:            aws.String(bucket.GetBucketName()),
 			Key:               aws.String(objectKey),
 			Body:              file,
 			ChecksumAlgorithm: types.ChecksumAlgorithmSha256,
 			ChecksumSHA256:    aws.String(checksum),
 		})
+	}
+	putResp, err := p.call(ctx, putCall, bucket.GetId(), storageState, opts...)
 	if err != nil {
 		return nil, parseS3Error("put object", err, req).Err()
 	}
+	resp := putResp.(*s3.PutObjectOutput)
+
 	if resp.ChecksumSHA256 == nil {
 		return nil, errors.UnknownStatus("missing checksum response from aws")
 	}
 	if checksum != *resp.ChecksumSHA256 {
 		return nil, checksumMistmatchStatus()
 	}
-	decodedChecksum, err := base64.StdEncoding.DecodeString(*resp.ChecksumSHA256)
-	if err != nil {
-		return nil, errors.UnknownStatus("failed to decode checksum value from aws")
-	}
 	return &pb.PutObjectResponse{
 		ChecksumSha_256: decodedChecksum,
 	}, nil
 }
 
+// putObjectMultipart uploads file to the given bucket and key using an S3
+// multipart upload. The file is split into parts of partSize bytes (the final
+// part may be smaller) and each part is uploaded with its own SHA-256 checksum
+// so S3 can verify part integrity on the wire.
+//
+// If any step fails the upload is aborted on a best-effort basis to avoid
+// leaving orphaned parts behind, which would otherwise continue to accrue
+// storage charges.
+func (p *StoragePlugin) putObjectMultipart(
+	ctx context.Context,
+	req *pb.PutObjectRequest,
+	storageState *awsStoragePersistedState,
+	bucketName, objectKey string,
+	file *os.File,
+	partSize int64,
+	opts ...s3Option,
+) error {
+	bucketId := req.GetBucket().GetId()
+
+	createCall := func(s3Client S3API) (any, error) {
+		return s3Client.CreateMultipartUpload(ctx, &s3.CreateMultipartUploadInput{
+			Bucket:            aws.String(bucketName),
+			Key:               aws.String(objectKey),
+			ChecksumAlgorithm: types.ChecksumAlgorithmSha256,
+		})
+	}
+	createResp, err := p.call(ctx, createCall, bucketId, storageState, opts...)
+	if err != nil {
+		return parseS3Error("create multipart upload", err, req).Err()
+	}
+	uploadId := createResp.(*s3.CreateMultipartUploadOutput).UploadId
+
+	// once the upload has been created, any subsequent failure must abort it so
+	// uploaded parts are not orphaned.
+	abort := func() {
+		abortCall := func(s3Client S3API) (any, error) {
+			return s3Client.AbortMultipartUpload(ctx, &s3.AbortMultipartUploadInput{
+				Bucket:   aws.String(bucketName),
+				Key:      aws.String(objectKey),
+				UploadId: uploadId,
+			})
+		}
+		// best effort: the failure that triggered the abort is more useful to
+		// the caller than an error from the abort itself.
+		_, _ = p.call(ctx, abortCall, bucketId, storageState, opts...)
+	}
+
+	var completedParts []types.CompletedPart
+	buf := make([]byte, partSize)
+	var partNumber int32 = 1
+	for {
+		n, readErr := io.ReadFull(file, buf)
+		if readErr == io.EOF {
+			// previous iteration consumed the final bytes of the file
+			break
+		}
+		if readErr != nil && readErr != io.ErrUnexpectedEOF {
+			abort()
+			return errors.UnknownStatusf("failed to read file: %s", readErr)
+		}
+
+		partData := buf[:n]
+		sum := sha256.Sum256(partData)
+		partChecksum := base64.StdEncoding.EncodeToString(sum[:])
+
+		pn := partNumber
+		uploadCall := func(s3Client S3API) (any, error) {
+			return s3Client.UploadPart(ctx, &s3.UploadPartInput{
+				Bucket:            aws.String(bucketName),
+				Key:               aws.String(objectKey),
+				UploadId:          uploadId,
+				PartNumber:        aws.Int32(pn),
+				Body:              bytes.NewReader(partData),
+				ContentLength:     aws.Int64(int64(n)),
+				ChecksumAlgorithm: types.ChecksumAlgorithmSha256,
+				ChecksumSHA256:    aws.String(partChecksum),
+			})
+		}
+		uploadResp, err := p.call(ctx, uploadCall, bucketId, storageState, opts...)
+		if err != nil {
+			abort()
+			return parseS3Error("upload part", err, req).Err()
+		}
+		part := uploadResp.(*s3.UploadPartOutput)
+		completedParts = append(completedParts, types.CompletedPart{
+			ETag:           part.ETag,
+			ChecksumSHA256: part.ChecksumSHA256,
+			PartNumber:     aws.Int32(pn),
+		})
+
+		partNumber++
+		if readErr == io.ErrUnexpectedEOF {
+			// the final, short part
+			break
+		}
+	}
+
+	completeCall := func(s3Client S3API) (any, error) {
+		return s3Client.CompleteMultipartUpload(ctx, &s3.CompleteMultipartUploadInput{
+			Bucket:   aws.String(bucketName),
+			Key:      aws.String(objectKey),
+			UploadId: uploadId,
+			MultipartUpload: &types.CompletedMultipartUpload{
+				Parts: completedParts,
+			},
+		})
+	}
+	if _, err := p.call(ctx, completeCall, bucketId, storageState, opts...); err != nil {
+		abort()
+		return parseS3Error("complete multipart upload", err, req).Err()
+	}
+
+	return nil
+}
+
 // DeleteObjects is used to delete one or many objects from an s3 bucket.
 func (p *StoragePlugin) DeleteObjects(ctx context.Context, req *pb.DeleteObjectsRequest) (*pb.DeleteObjectsResponse, error) {
 	if req.GetKeyPrefix() == "" {
@@ -673,7 +972,7 @@ func (p *StoragePlugin) DeleteObjects(ctx context.Context, req *pb.DeleteObjects
 		}, p.testCredStateOpts...)...,
 	)
 	if err != nil {
-		return nil, errors.BadRequestStatus("error setting up persisted state: %s", err)
+		return nil, errors.BadRequestStatusf("error setting up persisted state: %s", err)
 	}
 
 	storageState, err := newAwsStoragePersistedState(
@@ -682,17 +981,13 @@ func (p *StoragePlugin) DeleteObjects(ctx context.Context, req *pb.DeleteObjects
 		}, p.testStorageStateOpts...)...,
 	)
 	if err != nil {
-		return nil, errors.BadRequestStatus("error setting up persisted state: %s", err)
+		return nil, errors.BadRequestStatusf("error setting up persisted state: %s", err)
 	}
 
 	opts := []s3Option{}
 	if storageAttributes.EndpointUrl != "" {
 		opts = append(opts, WithEndpoint(storageAttributes.EndpointUrl))
 	}
-	client, err := storageState.S3Client(ctx, opts...)
-	if err != nil {
-		return nil, errors.BadRequestStatus("error getting S3 client: %s", err)
-	}
 
 	prefix := path.Join(bucket.GetBucketPrefix(), req.GetKeyPrefix())
 	if strings.HasSuffix(req.GetKeyPrefix(), "/") {
@@ -702,10 +997,13 @@ func (p *StoragePlugin) DeleteObjects(ctx context.Context, req *pb.DeleteObjects
 	}
 
 	if !req.Recursive {
-		_, err := client.DeleteObject(ctx, &s3.DeleteObjectInput{
+		deleteCall := func(s3Client S3API) (any, error) {
+			return s3Client.DeleteObject(ctx, &s3.DeleteObjectInput{
 				Bucket: aws.String(bucket.GetBucketName()),
 				Key:    aws.String(prefix),
 			})
+		}
+		_, err := p.call(ctx, deleteCall, bucket.GetId(), storageState, opts...)
 		if err != nil {
 			return nil, parseS3Error("delete object", err, req).Err()
 		}
@@ -715,10 +1013,13 @@ func (p *StoragePlugin) DeleteObjects(ctx context.Context, req *pb.DeleteObjects
 	}
 
 	const maxkeys = 1000
-
 	objects := []types.ObjectIdentifier{}
+	client, err := p.getClient(ctx, bucket.GetId(), storageState, opts...)
+	if err != nil {
+		return nil, errors.BadRequestStatusf("error getting S3 client: %s", err)
+	}
 	var conToken *string
-	truncated := true
+	truncated, firstAttempt := true, true
 	for truncated {
 		res, err := client.ListObjectsV2(ctx, &s3.ListObjectsV2Input{
 			Bucket:            aws.String(bucket.GetBucketName()),
@@ -727,6 +1028,18 @@ func (p *StoragePlugin) DeleteObjects(ctx context.Context, req *pb.DeleteObjects
 			ContinuationToken: conToken,
 		})
 		if err != nil {
+			st, _ := errors.ParseAWSError("", err)
+			if st.Code() == codes.PermissionDenied && firstAttempt {
+				// This is first attempt and we get a permission error, refresh cache and try again
+				firstAttempt = false
+				opts = append(opts, WithCacheRefresh(true))
+				client, err = p.getClient(ctx, bucket.GetId(), storageState, opts...)
+				if err != nil {
+					return nil, errors.BadRequestStatusf("error refreshing S3 client: %s", err)
+				}
+				continue
+			}
+
 			return nil, parseS3Error("list objects", err, req).Err()
 		}
 		truncated = aws.ToBool(res.IsTruncated)
@@ -759,6 +1072,191 @@ func (p *StoragePlugin) DeleteObjects(ctx context.Context, req *pb.DeleteObjects
 	}, nil
 }
 
+// ListObjects retrieves files and directories from an S3 bucket under a given prefix.
+// If the "recursive" flag in the request is false (default), it returns only the top-level objects directly under the prefix.
+// If the "recursive" is true, it returns all objects under the prefix recursively.
+func (p *StoragePlugin) ListObjects(ctx context.Context, req *pb.ListObjectsRequest) (*pb.ListObjectsResponse, error) {
+	bucket := req.GetBucket()
+	if bucket == nil {
+		return nil, errors.BadRequestStatus("bucket is required")
+	}
+
+	if bucket.BucketName == "" {
+		return nil, errors.BadRequestStatus("bucketName is required")
+	}
+
+	attrs := bucket.GetAttributes()
+	if attrs == nil {
+		return nil, errors.BadRequestStatus("attributes is required")
+	}
+
+	storageAttributes, err := getStorageAttributes(attrs)
+	if err != nil {
+		return nil, err
+	}
+
+	credConfig, err := cred.GetCredentialsConfig(bucket.GetSecrets(), storageAttributes.CredentialAttributes, false)
+	if err != nil {
+		return nil, err
+	}
+
+	// Set up the creds in our persisted state.
+	credState, err := cred.NewAwsCredentialPersistedState(
+		append([]cred.AwsCredentialPersistedStateOption{
+			cred.WithCredentialsConfig(credConfig),
+		}, p.testCredStateOpts...)...,
+	)
+	if err != nil {
+		return nil, errors.BadRequestStatusf("error setting up persisted state: %s", err)
+	}
+
+	storageState, err := newAwsStoragePersistedState(
+		append([]awsStoragePersistedStateOption{
+			withCredentials(credState),
+		}, p.testStorageStateOpts...)...,
+	)
+	if err != nil {
+		return nil, errors.BadRequestStatusf("error setting up persisted state: %s", err)
+	}
+
+	var opts []s3Option
+	if storageAttributes.EndpointUrl != "" {
+		opts = append(opts, WithEndpoint(storageAttributes.EndpointUrl))
+	}
+	s3Client, err := storageState.s3Client(ctx, opts...)
+	if err != nil {
+		return nil, errors.BadRequestStatusf("error getting S3 client: %s", err)
+	}
+
+	prefix := path.Join(bucket.GetBucketPrefix(), req.GetKeyPrefix())
+	if strings.HasSuffix(req.GetKeyPrefix(), "/") {
+		// path.Join ends by "cleaning" the path, including removing a trailing slash, if
+		// it exists. given that a slash is used to denote a folder, it is required here.
+		prefix += "/"
+	}
+	var objects []*pb.Object
+
+	if req.GetRecursive() {
+		objects, err = listObjectsRecursive(ctx, s3Client, bucket.GetBucketName(), prefix, req)
+	} else {
+		objects, err = listObjectsTopLevel(ctx, s3Client, bucket.GetBucketName(), prefix, req)
+	}
+	if err != nil {
+		return nil, err
+	}
+
+	return &pb.ListObjectsResponse{
+		Objects: objects,
+	}, nil
+}
+
+// listObjectsTopLevel lists only the objects that exist directly under the specified prefix (This does not traverse subdirectories)
+// It uses the S3 "Delimiter" option to group results so that subdirectories appear as CommonPrefixes.
+func listObjectsTopLevel(ctx context.Context, s3Client S3API, bucketName, prefix string, req *pb.ListObjectsRequest) ([]*pb.Object, error) {
+	var objects []*pb.Object
+	paginator := s3.NewListObjectsV2Paginator(s3Client, &s3.ListObjectsV2Input{
+		Bucket:    aws.String(bucketName),
+		Prefix:    aws.String(prefix),
+		Delimiter: aws.String("/"),
+	})
+
+	for paginator.HasMorePages() {
+		if err := ctx.Err(); err != nil {
+			switch {
+			case stderr.Is(err, context.Canceled):
+				return nil, status.Error(codes.Canceled, "request canceled")
+			case stderr.Is(err, context.DeadlineExceeded):
+				return nil, status.Error(codes.DeadlineExceeded, "request deadline exceeded")
+			default:
+				return nil, status.Error(codes.Internal, "unknown context error")
+			}
+		}
+		page, err := paginator.NextPage(ctx)
+		if err != nil {
+			return nil, parseS3Error("failed to list objects", err, req).Err()
+		}
+
+		for _, c := range page.Contents {
+			if c.Key != nil {
+				objects = append(objects, &pb.Object{Key: *c.Key, IsDir: false})
+			}
+		}
+		for _, cp := range page.CommonPrefixes {
+			if cp.Prefix != nil {
+				objects = append(objects, &pb.Object{Key: *cp.Prefix, IsDir: true})
+			}
+		}
+	}
+	return objects, nil
+}
+
+// listObjectsRecursive lists all objects under the specified prefix, traversing all subdirectories.
+// It does not use the S3 "Delimiter" option, so every object key that matches the prefix is returned.
+// This mode is useful for fully scanning all objects in a folder tree.
+func listObjectsRecursive(ctx context.Context, s3Client S3API, bucketName, prefix string, req *pb.ListObjectsRequest) ([]*pb.Object, error) {
+	var objects []*pb.Object
+	folderSet := make(map[string]struct{})
+	paginator := s3.NewListObjectsV2Paginator(s3Client, &s3.ListObjectsV2Input{
+		Bucket: aws.String(bucketName),
+		Prefix: aws.String(prefix),
+	})
+
+	for paginator.HasMorePages() {
+		if err := ctx.Err(); err != nil {
+			switch {
+			case stderr.Is(err, context.Canceled):
+				return nil, status.Error(codes.Canceled, "request canceled")
+			case stderr.Is(err, context.DeadlineExceeded):
+				return nil, status.Error(codes.DeadlineExceeded, "request deadline exceeded")
+			default:
+				return nil, status.Error(codes.Internal, "unknown context error")
+			}
+		}
+		page, err := paginator.NextPage(ctx)
+		if err != nil {
+			return nil, parseS3Error("failed to list objects", err, req).Err()
+		}
+
+		for _, c := range page.Contents {
+			// We intentionally ignore "empty objects" that simulate folders.
+			// S3 is not a traditional file system and does not have real directories.
+			// Folders are an abstraction; they are represented by zero-byte objects
+			// whose keys end with a slash (e.g., "myfolder/"). These objects exist
+			// solely as placeholders to give the appearance of directories in S3 tools.
+			// Here, we only include actual objects with content (non-zero length).
+			if c.Key != nil && !strings.HasSuffix(*c.Key, "/") {
+				objects = append(objects, &pb.Object{Key: *c.Key, IsDir: false})
+			}
+
+			// Extract all parent folder paths from the object key.
+			// We walk up the directory hierarchy using path.Dir,
+			// adding each parent folder to folderSet until we reach
+			// the root ("/" or ".") or leave the current prefix subtree.
+			// This ensures all intermediate "folders" appear in the result even if
+			// no explicit zero-byte object exists for them.
+			dir := path.Dir(*c.Key)
+			for dir != "." && dir != "/" {
+				folder := dir + "/"
+				if !strings.HasPrefix(folder, prefix) {
+					break // left the subtree, stop climbing up
+				}
+				if folder != prefix {
+					folderSet[folder] = struct{}{}
+				}
+				dir = path.Dir(dir)
+			}
+		}
+	}
+	// Add folders
+	for folder := range folderSet {
+		objects = append(objects, &pb.Object{
+			Key:   folder,
+			IsDir: true,
+		})
+	}
+	return objects, nil
+}
+
 // dryRunValidation validates that the IAM role policy attached to the given secrets of the
 // storage bucket has the minimum required permissions needed for this plugin to function
 // as expected. This function will create an object in the s3 bucket to validate it has
@@ -784,7 +1282,7 @@ func dryRunValidation(ctx context.Context, state *awsStoragePersistedState, attr
 		opts = append(opts, WithDualStack(attrs.DualStack))
 	}
 
-	client, err := state.S3Client(ctx, opts...)
+	client, err := state.s3Client(ctx, opts...)
 	if err != nil {
 		return status.New(codes.InvalidArgument, fmt.Sprintf("error getting S3 client: %s", err))
 	}

plugin/service/storage/plugin_test.go

@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2021, 2026
 // SPDX-License-Identifier: MPL-2.0
 
 package storage
@@ -23,10 +23,11 @@ import (
 	s3types "github.com/aws/aws-sdk-go-v2/service/s3/types"
 	"github.com/aws/aws-sdk-go-v2/service/sts"
 	"github.com/aws/aws-sdk-go-v2/service/sts/types"
-	"github.com/hashicorp/boundary-plugin-aws/internal/credential"
-	internal "github.com/hashicorp/boundary-plugin-aws/internal/errors"
-	"github.com/hashicorp/boundary/sdk/pbs/controller/api/resources/storagebuckets"
-	pb "github.com/hashicorp/boundary/sdk/pbs/plugin"
+	"repo.anhonesthost.net/CyberCoveLLC/threshold-plugin-aws/internal/credential"
+	internal "repo.anhonesthost.net/CyberCoveLLC/threshold-plugin-aws/internal/errors"
+	"repo.anhonesthost.net/CyberCoveLLC/threshold/sdk/pbs/controller/api/resources/storagebuckets"
+	"repo.anhonesthost.net/CyberCoveLLC/threshold/sdk/pbs/plugin"
+	pb "repo.anhonesthost.net/CyberCoveLLC/threshold/sdk/pbs/plugin"
 	"github.com/hashicorp/go-secure-stdlib/awsutil/v2"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
@@ -36,6 +37,204 @@ import (
 	"google.golang.org/protobuf/types/known/timestamppb"
 )
 
+func TestStoragePlugin_NormalizeStorageBucketData(t *testing.T) {
+	ctx := context.Background()
+
+	tests := []struct {
+		name     string
+		req      *plugin.NormalizeStorageBucketDataRequest
+		expected *plugin.NormalizeStorageBucketDataResponse
+		err      string
+	}{
+		{
+			name: "missing attributes",
+			req:  &plugin.NormalizeStorageBucketDataRequest{},
+			err:  "attributes.region: missing required value \"region\"",
+		},
+		{
+			name: "empty attributes",
+			req: &plugin.NormalizeStorageBucketDataRequest{
+				Attributes: &structpb.Struct{},
+			},
+			err: "attributes.region: missing required value \"region\"",
+		},
+		{
+			name: "missing required field",
+			req: &plugin.NormalizeStorageBucketDataRequest{
+				Attributes: &structpb.Struct{
+					Fields: map[string]*structpb.Value{
+						ConstAwsEndpointUrl: structpb.NewStringValue("http://127.0.0.1:9000"),
+					},
+				},
+			},
+			err: "attributes.region: missing required value \"region\"",
+		},
+		{
+			name: "missing endpoint_url",
+			req: &plugin.NormalizeStorageBucketDataRequest{
+				Attributes: &structpb.Struct{
+					Fields: map[string]*structpb.Value{
+						credential.ConstRegion: structpb.NewStringValue("somewhere"),
+					},
+				},
+			},
+			expected: &plugin.NormalizeStorageBucketDataResponse{
+				Attributes: &structpb.Struct{
+					Fields: map[string]*structpb.Value{
+						credential.ConstRegion: structpb.NewStringValue("somewhere"),
+					},
+				},
+			},
+		},
+		{
+			name: "valid endpoint_url returned unchanged",
+			req: &plugin.NormalizeStorageBucketDataRequest{
+				Attributes: &structpb.Struct{
+					Fields: map[string]*structpb.Value{
+						ConstAwsEndpointUrl:    structpb.NewStringValue("http://127.0.0.1:9000"),
+						credential.ConstRegion: structpb.NewStringValue("somewhere"),
+					},
+				},
+			},
+			expected: &plugin.NormalizeStorageBucketDataResponse{
+				Attributes: &structpb.Struct{
+					Fields: map[string]*structpb.Value{
+						ConstAwsEndpointUrl:    structpb.NewStringValue("http://127.0.0.1:9000"),
+						credential.ConstRegion: structpb.NewStringValue("somewhere"),
+					},
+				},
+			},
+		},
+		{
+			name: "valid ipv6 endpoint_url returned normalized",
+			req: &plugin.NormalizeStorageBucketDataRequest{
+				Attributes: &structpb.Struct{
+					Fields: map[string]*structpb.Value{
+						ConstAwsEndpointUrl:    structpb.NewStringValue("https://[2001:BEEF:0:0:0:1:0:0001]"),
+						credential.ConstRegion: structpb.NewStringValue("somewhere"),
+					},
+				},
+			},
+			expected: &plugin.NormalizeStorageBucketDataResponse{
+				Attributes: &structpb.Struct{
+					Fields: map[string]*structpb.Value{
+						ConstAwsEndpointUrl:    structpb.NewStringValue("https://[2001:beef::1:0:1]"),
+						credential.ConstRegion: structpb.NewStringValue("somewhere"),
+					},
+				},
+			},
+		},
+		{
+			name: "valid ipv6 endpoint_url with port returned normalized",
+			req: &plugin.NormalizeStorageBucketDataRequest{
+				Attributes: &structpb.Struct{
+					Fields: map[string]*structpb.Value{
+						ConstAwsEndpointUrl:    structpb.NewStringValue("https://[2001:BEEF:0:0:0:1:0:0001]:9000"),
+						credential.ConstRegion: structpb.NewStringValue("somewhere"),
+					},
+				},
+			},
+			expected: &plugin.NormalizeStorageBucketDataResponse{
+				Attributes: &structpb.Struct{
+					Fields: map[string]*structpb.Value{
+						ConstAwsEndpointUrl:    structpb.NewStringValue("https://[2001:beef::1:0:1]:9000"),
+						credential.ConstRegion: structpb.NewStringValue("somewhere"),
+					},
+				},
+			},
+		},
+		{
+			name: "invalid ipv6 endpoint_url returns normalization error",
+			req: &plugin.NormalizeStorageBucketDataRequest{
+				Attributes: &structpb.Struct{
+					Fields: map[string]*structpb.Value{
+						ConstAwsEndpointUrl:    structpb.NewStringValue("https://[2001:BEEF:0:0:0:1:0:0001"),
+						credential.ConstRegion: structpb.NewStringValue("somewhere"),
+					},
+				},
+			},
+			err: "failed to normalize provided endpoint_url: failed to parse address",
+		},
+		{
+			name: "invalid ipv6 endpoint_url returns normalization error 2",
+			req: &plugin.NormalizeStorageBucketDataRequest{
+				Attributes: &structpb.Struct{
+					Fields: map[string]*structpb.Value{
+						ConstAwsEndpointUrl:    structpb.NewStringValue("https://[2001:BEEF:0:0:0:1:0:0001]:"),
+						credential.ConstRegion: structpb.NewStringValue("somewhere"),
+					},
+				},
+			},
+			err: "failed to normalize provided endpoint_url: url has malformed host: missing port value after colon",
+		},
+		{
+			name: "valid all fields returns normalized",
+			req: &plugin.NormalizeStorageBucketDataRequest{
+				Attributes: &structpb.Struct{
+					Fields: map[string]*structpb.Value{
+						ConstAwsEndpointUrl:                       structpb.NewStringValue("http://[2001:BEEF:0:0:0:1:0:0001]:9000/test/path"),
+						credential.ConstRegion:                    structpb.NewStringValue("somewhere ❤"),
+						credential.ConstDisableCredentialRotation: structpb.NewBoolValue(false),
+						credential.ConstRoleArn:                   structpb.NewStringValue("an arn"),
+						credential.ConstRoleExternalId:            structpb.NewStringValue("id"),
+						credential.ConstRoleSessionName:           structpb.NewStringValue("sesh"),
+						ConstAwsDualStack:                         structpb.NewBoolValue(false),
+						credential.ConstRoleTags: structpb.NewStructValue(&structpb.Struct{
+							Fields: map[string]*structpb.Value{
+								"foo": structpb.NewStringValue("bar"),
+							},
+						}),
+					},
+				},
+			},
+			expected: &plugin.NormalizeStorageBucketDataResponse{
+				Attributes: &structpb.Struct{
+					Fields: map[string]*structpb.Value{
+						ConstAwsEndpointUrl:                       structpb.NewStringValue("http://[2001:beef::1:0:1]:9000/test/path"),
+						credential.ConstRegion:                    structpb.NewStringValue("somewhere ❤"),
+						credential.ConstDisableCredentialRotation: structpb.NewBoolValue(false),
+						credential.ConstRoleArn:                   structpb.NewStringValue("an arn"),
+						credential.ConstRoleExternalId:            structpb.NewStringValue("id"),
+						credential.ConstRoleSessionName:           structpb.NewStringValue("sesh"),
+						ConstAwsDualStack:                         structpb.NewBoolValue(false),
+						credential.ConstRoleTags: structpb.NewStructValue(&structpb.Struct{
+							Fields: map[string]*structpb.Value{
+								"foo": structpb.NewStringValue("bar"),
+							},
+						}),
+					},
+				},
+			},
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			assert := assert.New(t)
+			require := require.New(t)
+			sp := new(StoragePlugin)
+			res, err := sp.NormalizeStorageBucketData(ctx, tt.req)
+
+			if tt.err != "" {
+				require.ErrorContains(err, tt.err)
+				return
+			}
+			if err != nil {
+				if st, ok := status.FromError(err); ok {
+					require.Nil(err, st.Message())
+				}
+			}
+			require.Nil(err)
+			for key, val := range tt.expected.GetAttributes().GetFields() {
+				v, ok := res.GetAttributes().GetFields()[key]
+				assert.True(ok, "missing expected value: %q", key)
+				if ok {
+					assert.Equal(val, v, "expected[%q]: %v, but got: %v", key, val, v)
+				}
+			}
+		})
+	}
+}
+
 func TestStoragePlugin_OnCreateStorageBucket(t *testing.T) {
 	validRequest := func() *pb.OnCreateStorageBucketRequest {
 		return &pb.OnCreateStorageBucketRequest{
@@ -3516,6 +3715,195 @@ func TestStoragePlugin_PutObject(t *testing.T) {
 	}
 }
 
+func TestStoragePlugin_PutObjectMultipart(t *testing.T) {
+	td := t.TempDir()
+
+	// genFile writes size bytes of deterministic content to a temp file and
+	// returns its path along with the raw SHA-256 digest of the whole file.
+	genFile := func(t *testing.T, name string, size int) (string, []byte) {
+		t.Helper()
+		data := make([]byte, size)
+		for i := range data {
+			data[i] = byte(i % 251)
+		}
+		fp := path.Join(td, name)
+		require.NoError(t, os.WriteFile(fp, data, 0o600))
+		sum := sha256.Sum256(data)
+		return fp, sum[:]
+	}
+
+	validRequest := func(p string) *pb.PutObjectRequest {
+		return &pb.PutObjectRequest{
+			Bucket: &storagebuckets.StorageBucket{
+				BucketName:   "external-obj-store",
+				BucketPrefix: "prefix",
+				Secrets:      credential.MockStaticCredentialSecrets(),
+				Attributes: &structpb.Struct{
+					Fields: map[string]*structpb.Value{
+						credential.ConstRegion: structpb.NewStringValue("us-west-2"),
+					},
+				},
+			},
+			Key:  "mock-object",
+			Path: p,
+		}
+	}
+
+	t.Run("multipart success spanning multiple parts", func(t *testing.T) {
+		require, assert := require.New(t), assert.New(t)
+		// 20 MiB with 8 MiB parts -> 3 parts (8, 8, 4 MiB).
+		fp, wholeChecksum := genFile(t, "large-file", 20*1024*1024)
+
+		state := &testMockS3State{}
+		p := &StoragePlugin{
+			testCredStateOpts: validSTSMock(),
+			testStorageStateOpts: []awsStoragePersistedStateOption{
+				withTestS3APIFunc(newTestMockS3(state)),
+			},
+		}
+
+		resp, err := p.PutObject(context.Background(), validRequest(fp))
+		require.NoError(err)
+		require.NotNil(resp)
+
+		// Boundary must receive the whole-object SHA-256, not the multipart
+		// composite checksum.
+		assert.True(bytes.Equal(wholeChecksum, resp.GetChecksumSha_256()))
+
+		// The single-shot PutObject path must not have been used.
+		assert.False(state.PutObjectCalled)
+		assert.True(state.CreateMultipartUploadCalled)
+		assert.Equal(3, state.UploadPartCallCount)
+		assert.True(state.CompleteMultipartUploadCalled)
+		assert.False(state.AbortMultipartUploadCalled)
+
+		// The reassembled part bodies must equal the original file content.
+		orig, err := os.ReadFile(fp)
+		require.NoError(err)
+		assert.True(bytes.Equal(orig, state.UploadPartBody))
+
+		// The object key must include the configured bucket prefix.
+		require.NotNil(state.CreateMultipartUploadInputParams)
+		assert.Equal("prefix/mock-object", aws.ToString(state.CreateMultipartUploadInputParams.Key))
+	})
+
+	t.Run("file just above threshold uses two parts", func(t *testing.T) {
+		require, assert := require.New(t), assert.New(t)
+		// 8 MiB + 1 byte -> 2 parts (8 MiB, 1 byte).
+		fp, wholeChecksum := genFile(t, "just-over", 8*1024*1024+1)
+
+		state := &testMockS3State{}
+		p := &StoragePlugin{
+			testCredStateOpts: validSTSMock(),
+			testStorageStateOpts: []awsStoragePersistedStateOption{
+				withTestS3APIFunc(newTestMockS3(state)),
+			},
+		}
+
+		resp, err := p.PutObject(context.Background(), validRequest(fp))
+		require.NoError(err)
+		assert.True(bytes.Equal(wholeChecksum, resp.GetChecksumSha_256()))
+		assert.Equal(2, state.UploadPartCallCount)
+		assert.True(state.CompleteMultipartUploadCalled)
+	})
+
+	t.Run("file at threshold uses single PutObject", func(t *testing.T) {
+		require, assert := require.New(t), assert.New(t)
+		// Exactly 8 MiB is not above the threshold, so the single-shot path is used.
+		fp, wholeChecksum := genFile(t, "at-threshold", 8*1024*1024)
+		checksum := base64.StdEncoding.EncodeToString(wholeChecksum)
+
+		state := &testMockS3State{}
+		p := &StoragePlugin{
+			testCredStateOpts: validSTSMock(),
+			testStorageStateOpts: []awsStoragePersistedStateOption{
+				withTestS3APIFunc(newTestMockS3(
+					state,
+					testMockS3WithPutObjectOutput(&s3.PutObjectOutput{
+						ChecksumSHA256: aws.String(checksum),
+					}),
+				)),
+			},
+		}
+
+		resp, err := p.PutObject(context.Background(), validRequest(fp))
+		require.NoError(err)
+		assert.True(bytes.Equal(wholeChecksum, resp.GetChecksumSha_256()))
+		assert.True(state.PutObjectCalled)
+		assert.False(state.CreateMultipartUploadCalled)
+	})
+
+	t.Run("create multipart upload error", func(t *testing.T) {
+		require, assert := require.New(t), assert.New(t)
+		fp, _ := genFile(t, "create-err", 20*1024*1024)
+
+		state := &testMockS3State{}
+		p := &StoragePlugin{
+			testCredStateOpts: validSTSMock(),
+			testStorageStateOpts: []awsStoragePersistedStateOption{
+				withTestS3APIFunc(newTestMockS3(
+					state,
+					testMockS3WithCreateMultipartUploadError(TestAwsS3Error("AccessDenied", "CreateMultipartUpload", "not authorized")),
+				)),
+			},
+		}
+
+		resp, err := p.PutObject(context.Background(), validRequest(fp))
+		require.Error(err)
+		assert.Nil(resp)
+		assert.Equal(codes.PermissionDenied, status.Code(err))
+		// Nothing was created, so nothing should be aborted.
+		assert.False(state.AbortMultipartUploadCalled)
+	})
+
+	t.Run("upload part error aborts upload", func(t *testing.T) {
+		require, assert := require.New(t), assert.New(t)
+		fp, _ := genFile(t, "upload-err", 20*1024*1024)
+
+		state := &testMockS3State{}
+		p := &StoragePlugin{
+			testCredStateOpts: validSTSMock(),
+			testStorageStateOpts: []awsStoragePersistedStateOption{
+				withTestS3APIFunc(newTestMockS3(
+					state,
+					testMockS3WithUploadPartErrorOnPart(2, TestAwsS3Error("AccessDenied", "UploadPart", "not authorized")),
+				)),
+			},
+		}
+
+		resp, err := p.PutObject(context.Background(), validRequest(fp))
+		require.Error(err)
+		assert.Nil(resp)
+		assert.Equal(codes.PermissionDenied, status.Code(err))
+		assert.True(state.CreateMultipartUploadCalled)
+		assert.False(state.CompleteMultipartUploadCalled)
+		// The failed upload must be aborted to avoid orphaned parts.
+		assert.True(state.AbortMultipartUploadCalled)
+	})
+
+	t.Run("complete multipart upload error aborts upload", func(t *testing.T) {
+		require, assert := require.New(t), assert.New(t)
+		fp, _ := genFile(t, "complete-err", 20*1024*1024)
+
+		state := &testMockS3State{}
+		p := &StoragePlugin{
+			testCredStateOpts: validSTSMock(),
+			testStorageStateOpts: []awsStoragePersistedStateOption{
+				withTestS3APIFunc(newTestMockS3(
+					state,
+					testMockS3WithCompleteMultipartUploadError(TestAwsS3Error("InternalError", "CompleteMultipartUpload", "boom")),
+				)),
+			},
+		}
+
+		resp, err := p.PutObject(context.Background(), validRequest(fp))
+		require.Error(err)
+		assert.Nil(resp)
+		assert.Equal(3, state.UploadPartCallCount)
+		assert.True(state.AbortMultipartUploadCalled)
+	})
+}
+
 func TestStoragePlugin_DeleteObjects(t *testing.T) {
 	validRequest := func() *pb.DeleteObjectsRequest {
 		return &pb.DeleteObjectsRequest{
@@ -3917,3 +4305,477 @@ func TestStoragePlugin_DeleteObjects(t *testing.T) {
 		})
 	}
 }
+
+func TestS3ClientCache(t *testing.T) {
+	ctx := context.Background()
+	assert, require := assert.New(t), require.New(t)
+
+	cred1, err := awsutil.NewCredentialsConfig(
+		awsutil.WithRegion("us-east-1"),
+		awsutil.WithAccessKey("cred1"),
+		awsutil.WithSecretKey("secret1"),
+	)
+	require.NoError(err)
+	cred2, err := awsutil.NewCredentialsConfig(
+		awsutil.WithRegion("us-east-1"),
+		awsutil.WithAccessKey("cred2"),
+		awsutil.WithSecretKey("secret2"),
+	)
+	require.NoError(err)
+	cred3, err := awsutil.NewCredentialsConfig(
+		awsutil.WithRegion("us-east-1"),
+		awsutil.WithAccessKey("cred3"),
+		awsutil.WithSecretKey("secret3"),
+	)
+	require.NoError(err)
+
+	p := New()
+	cred, err := credential.NewAwsCredentialPersistedState(
+		credential.WithCredentialsConfig(cred1),
+	)
+	require.NoError(err)
+
+	state, err := newAwsStoragePersistedState(withCredentials(cred))
+	require.NoError(err)
+
+	// Cache should be empty before first call
+	assert.Empty(p.clients.cache)
+
+	client, err := p.getClient(ctx, "id", state)
+	require.NoError(err)
+	require.NotNil(client)
+	assert.Equal(cred1.AccessKey, client.Credentials().AccessKeyID)
+	assert.Equal(cred1.SecretKey, client.Credentials().SecretAccessKey)
+
+	// Update state with new credentials
+	cred, err = credential.NewAwsCredentialPersistedState(
+		credential.WithCredentialsConfig(cred2),
+	)
+	require.NoError(err)
+	state, err = newAwsStoragePersistedState(withCredentials(cred))
+	require.NoError(err)
+
+	// Client is cached and creds valid so it should still grab initial client
+	client, err = p.getClient(ctx, "id", state)
+	require.NoError(err)
+	require.NotNil(client)
+	assert.Equal(cred1.AccessKey, client.Credentials().AccessKeyID)
+	assert.Equal(cred1.SecretKey, client.Credentials().SecretAccessKey)
+
+	// Force credentials to expire
+	c := client.(*s3Client)
+	c.creds.CanExpire = true
+	p.clients.Lock()
+	p.clients.cache["id"] = c
+	p.clients.Unlock()
+
+	// Getting client should now create new client on cred2 since the credentials have expired
+	client, err = p.getClient(ctx, "id", state)
+	require.NoError(err)
+	require.NotNil(client)
+	assert.Equal(cred2.AccessKey, client.Credentials().AccessKeyID)
+	assert.Equal(cred2.SecretKey, client.Credentials().SecretAccessKey)
+
+	// Update state with new credentials again
+	cred, err = credential.NewAwsCredentialPersistedState(
+		credential.WithCredentialsConfig(cred3),
+	)
+	require.NoError(err)
+	state, err = newAwsStoragePersistedState(withCredentials(cred))
+	require.NoError(err)
+
+	// Getting client and force cache refresh should return cred3 based client
+	client, err = p.getClient(ctx, "id", state, WithCacheRefresh(true))
+	require.NoError(err)
+	require.NotNil(client)
+	assert.Equal(cred3.AccessKey, client.Credentials().AccessKeyID)
+	assert.Equal(cred3.SecretKey, client.Credentials().SecretAccessKey)
+}
+
+func TestStoragePlugin_ListObjects(t *testing.T) {
+	validRequest := func() *pb.ListObjectsRequest {
+		return &pb.ListObjectsRequest{
+			KeyPrefix: "foo/bar/",
+			Bucket: &storagebuckets.StorageBucket{
+				BucketName: "foo",
+				Secrets:    credential.MockStaticCredentialSecrets(),
+				Attributes: &structpb.Struct{
+					Fields: map[string]*structpb.Value{
+						credential.ConstRegion: structpb.NewStringValue("us-west-2"),
+					},
+				},
+			},
+		}
+	}
+
+	cases := []struct {
+		name                string
+		req                 *pb.ListObjectsRequest
+		credOpts            []credential.AwsCredentialPersistedStateOption
+		storageOpts         []awsStoragePersistedStateOption
+		ctx                 context.Context
+		expectedObjects     []*pb.Object
+		expectedErrContains string
+		expectedErrCode     codes.Code
+		expectedDetails     *pb.StorageBucketCredentialState
+	}{
+		{
+			name:                "nil bucket",
+			req:                 &pb.ListObjectsRequest{KeyPrefix: "foo/bar"},
+			expectedErrContains: "bucket is required",
+			expectedErrCode:     codes.InvalidArgument,
+		},
+		{
+			name: "empty bucket name",
+			req: &pb.ListObjectsRequest{
+				KeyPrefix: "foo/bar",
+				Bucket:    &storagebuckets.StorageBucket{},
+			},
+			expectedErrContains: "bucketName is required",
+			expectedErrCode:     codes.InvalidArgument,
+		},
+		{
+			name: "nil attributes",
+			req: &pb.ListObjectsRequest{
+				KeyPrefix: "foo/bar",
+				Bucket: &storagebuckets.StorageBucket{
+					BucketName: "foo",
+				},
+			},
+			expectedErrContains: "attributes is required",
+			expectedErrCode:     codes.InvalidArgument,
+		},
+		{
+			name: "error reading attributes",
+			req: &pb.ListObjectsRequest{
+				KeyPrefix: "foo/bar",
+				Bucket: &storagebuckets.StorageBucket{
+					BucketName: "foo",
+					Attributes: new(structpb.Struct),
+				},
+			},
+			expectedErrContains: "missing required value \"region\"",
+			expectedErrCode:     codes.InvalidArgument,
+		},
+		{
+			name: "credential persisted state setup error",
+			req:  validRequest(),
+			credOpts: []credential.AwsCredentialPersistedStateOption{
+				func(s *credential.AwsCredentialPersistedState) error {
+					return errors.New(testOptionErr)
+				},
+			},
+			expectedErrContains: fmt.Sprintf("error setting up persisted state: %s", testOptionErr),
+			expectedErrCode:     codes.InvalidArgument,
+		},
+		{
+			name: "storage persisted state setup error",
+			req:  validRequest(),
+			storageOpts: []awsStoragePersistedStateOption{
+				func(s *awsStoragePersistedState) error {
+					return errors.New(testOptionErr)
+				},
+			},
+			expectedErrContains: fmt.Sprintf("error setting up persisted state: %s", testOptionErr),
+			expectedErrCode:     codes.InvalidArgument,
+		},
+		{
+			name:     "listObjectsV2 access denied error",
+			req:      validRequest(),
+			credOpts: validSTSMock(),
+			storageOpts: []awsStoragePersistedStateOption{
+				withTestS3APIFunc(
+					newTestMockS3(
+						nil,
+						testMockS3WithListObjectsV2Error(TestAwsS3Error("AccessDenied", "ListObjectsV2", "not authorized")),
+					),
+				),
+			},
+			expectedErrContains: "aws service s3: invalid credentials: failed to list objects",
+			expectedErrCode:     codes.PermissionDenied,
+			expectedDetails: &pb.StorageBucketCredentialState{
+				State: &pb.Permissions{
+					Read: &pb.Permission{
+						State:        pb.StateType_STATE_TYPE_ERROR,
+						ErrorDetails: "not authorized",
+						CheckedAt:    timestamppb.Now(),
+					},
+				},
+			},
+		},
+		{
+			name:     "listObjectsV2 throttling error",
+			req:      validRequest(),
+			credOpts: validSTSMock(),
+			storageOpts: []awsStoragePersistedStateOption{
+				withTestS3APIFunc(
+					newTestMockS3(
+						nil,
+						testMockS3WithListObjectsV2Error(TestAwsS3Error("ThrottlingException", "ListObjectsV2", "throttling exception")),
+					),
+				),
+			},
+			expectedErrContains: "aws service s3: throttling: failed to list objects",
+			expectedErrCode:     codes.Unavailable,
+			expectedDetails: &pb.StorageBucketCredentialState{
+				State: &pb.Permissions{
+					Read: &pb.Permission{
+						State:     pb.StateType_STATE_TYPE_UNKNOWN,
+						CheckedAt: timestamppb.Now(),
+					},
+				},
+			},
+		},
+		{
+			name: "context canceled - non recursive",
+			req:  validRequest(),
+			ctx: func() context.Context {
+				c, cancel := context.WithCancel(context.Background())
+				cancel()
+				return c
+			}(),
+			credOpts: validSTSMock(),
+			storageOpts: []awsStoragePersistedStateOption{
+				withTestS3APIFunc(
+					newTestMockS3(
+						nil,
+						// Return an error that simulates context cancellation being detected at the AWS level
+						testMockS3WithListObjectsV2Error(context.Canceled),
+					),
+				),
+			},
+			expectedErrContains: "request canceled",
+			expectedErrCode:     codes.Canceled,
+		},
+		{
+			name: "context deadline exceeded - non recursive",
+			req:  validRequest(),
+			ctx: func() context.Context {
+				c, cancel := context.WithTimeout(context.Background(), 1*time.Nanosecond)
+				time.Sleep(2 * time.Nanosecond) // Ensure deadline is exceeded
+				cancel()
+				return c
+			}(),
+			credOpts: validSTSMock(),
+			storageOpts: []awsStoragePersistedStateOption{
+				withTestS3APIFunc(
+					newTestMockS3(
+						nil,
+						// Return an error that simulates deadline exceeded being detected at the AWS level
+						testMockS3WithListObjectsV2Error(context.DeadlineExceeded),
+					),
+				),
+			},
+			expectedErrContains: "request deadline exceeded",
+			expectedErrCode:     codes.DeadlineExceeded,
+		},
+		{
+			name: "context canceled - recursive",
+			req: func() *pb.ListObjectsRequest {
+				r := validRequest()
+				r.Recursive = true
+				return r
+			}(),
+			ctx: func() context.Context {
+				c, cancel := context.WithCancel(context.Background())
+				cancel() // Cancel immediately
+				return c
+			}(),
+			credOpts: validSTSMock(),
+			storageOpts: []awsStoragePersistedStateOption{
+				withTestS3APIFunc(
+					newTestMockS3(
+						nil,
+						// Return an error that simulates context cancellation being detected at the AWS level
+						testMockS3WithListObjectsV2Error(context.Canceled),
+					),
+				),
+			},
+			expectedErrContains: "request canceled",
+			expectedErrCode:     codes.Canceled,
+		},
+		{
+			name: "context deadline exceeded - recursive",
+			req: func() *pb.ListObjectsRequest {
+				r := validRequest()
+				r.Recursive = true
+				return r
+			}(),
+			ctx: func() context.Context {
+				c, cancel := context.WithTimeout(context.Background(), 1*time.Nanosecond)
+				// Ensure the deadline is exceeded
+				time.Sleep(2 * time.Nanosecond)
+				cancel()
+				return c
+			}(),
+			credOpts: validSTSMock(),
+			storageOpts: []awsStoragePersistedStateOption{
+				withTestS3APIFunc(
+					newTestMockS3(
+						nil,
+						// Return an error that simulates deadline exceeded being detected at the AWS level
+						testMockS3WithListObjectsV2Error(context.DeadlineExceeded),
+					),
+				),
+			},
+			expectedErrContains: "request deadline exceeded",
+			expectedErrCode:     codes.DeadlineExceeded,
+		},
+		{
+			name:     "success - single page top-level",
+			req:      validRequest(),
+			credOpts: validSTSMock(),
+			storageOpts: []awsStoragePersistedStateOption{
+				withTestS3APIFunc(
+					newTestMockS3(
+						nil,
+						testMockS3WithListObjectsV2Output(&s3.ListObjectsV2Output{
+							CommonPrefixes: []s3types.CommonPrefix{
+								{Prefix: aws.String("foo/bar/key/")},
+							},
+							Contents: []s3types.Object{
+								{Key: aws.String("foo/bar/file1.bsr")},
+								{Key: aws.String("foo/bar/file2.bsr")},
+							},
+						}),
+					),
+				),
+			},
+			expectedObjects: []*pb.Object{
+				{Key: "foo/bar/key/", IsDir: true},
+				{Key: "foo/bar/file1.bsr", IsDir: false},
+				{Key: "foo/bar/file2.bsr", IsDir: false},
+			},
+		},
+		{
+			name: "success - recursive listing with nested dirs",
+			req: func() *pb.ListObjectsRequest {
+				r := validRequest()
+				r.Recursive = true
+				return r
+			}(),
+			credOpts: validSTSMock(),
+			storageOpts: []awsStoragePersistedStateOption{
+				withTestS3APIFunc(
+					newTestMockS3(
+						nil,
+						testMockS3WithListObjectsV2Output(&s3.ListObjectsV2Output{
+							Contents: []s3types.Object{
+								{Key: aws.String("foo/bar/file1.bsr")},
+								{Key: aws.String("foo/bar/nested/file2.bsr")},
+								{Key: aws.String("foo/bar/nested/deeper/file3.bsr")},
+							},
+						}),
+					),
+				),
+			},
+			expectedObjects: []*pb.Object{
+				{Key: "foo/bar/file1.bsr", IsDir: false},
+				{Key: "foo/bar/nested/", IsDir: true},
+				{Key: "foo/bar/nested/file2.bsr", IsDir: false},
+				{Key: "foo/bar/nested/deeper/", IsDir: true},
+				{Key: "foo/bar/nested/deeper/file3.bsr", IsDir: false},
+			},
+		},
+		{
+			name: "success - recursive multi-page",
+			req: func() *pb.ListObjectsRequest {
+				r := validRequest()
+				r.Recursive = true
+				return r
+			}(),
+			credOpts: validSTSMock(),
+			storageOpts: []awsStoragePersistedStateOption{
+				withTestS3APIFunc(
+					newTestMockS3(
+						nil,
+						testMockS3WithListObjectsV2OutputFunc(func(input *s3.ListObjectsV2Input) *s3.ListObjectsV2Output {
+							if input.ContinuationToken == nil {
+								return &s3.ListObjectsV2Output{
+									Contents: []s3types.Object{
+										{Key: aws.String("foo/bar/page1/file1.bsr")},
+									},
+									NextContinuationToken: aws.String("token123"),
+									IsTruncated:           aws.Bool(true),
+								}
+							}
+							if aws.ToString(input.ContinuationToken) == "token123" {
+								return &s3.ListObjectsV2Output{
+									Contents: []s3types.Object{
+										{Key: aws.String("foo/bar/page2/file2.bsr")},
+									},
+								}
+							}
+							return &s3.ListObjectsV2Output{}
+						}),
+					),
+				),
+			},
+			expectedObjects: []*pb.Object{
+				{Key: "foo/bar/page1/", IsDir: true},
+				{Key: "foo/bar/page1/file1.bsr", IsDir: false},
+				{Key: "foo/bar/page2/", IsDir: true},
+				{Key: "foo/bar/page2/file2.bsr", IsDir: false},
+			},
+		},
+		{
+			name: "success - recursive empty",
+			req: func() *pb.ListObjectsRequest {
+				r := validRequest()
+				r.Recursive = true
+				return r
+			}(),
+			credOpts: validSTSMock(),
+			storageOpts: []awsStoragePersistedStateOption{
+				withTestS3APIFunc(
+					newTestMockS3(nil, testMockS3WithListObjectsV2Output(&s3.ListObjectsV2Output{})),
+				),
+			},
+			expectedObjects: []*pb.Object(nil),
+		},
+	}
+
+	for _, tc := range cases {
+		t.Run(tc.name, func(t *testing.T) {
+			require, assert := require.New(t), assert.New(t)
+			p := &StoragePlugin{
+				testCredStateOpts:    tc.credOpts,
+				testStorageStateOpts: tc.storageOpts,
+			}
+			ctx := tc.ctx
+			if ctx == nil {
+				ctx = context.Background()
+			}
+			resp, err := p.ListObjects(ctx, tc.req)
+
+			if tc.expectedErrContains != "" {
+				require.Error(err)
+				assert.Contains(err.Error(), tc.expectedErrContains)
+				assert.Equal(tc.expectedErrCode, status.Code(err))
+
+				st, ok := status.FromError(err)
+				require.True(ok)
+				if tc.expectedDetails != nil {
+					var state *pb.StorageBucketCredentialState
+					for _, detail := range st.Details() {
+						if errDetail, ok := detail.(*pb.StorageBucketCredentialState); ok {
+							state = errDetail
+							break
+						}
+					}
+					require.NotNil(state)
+					internal.CheckSimilarPermission(assert, tc.expectedDetails.State.Read, state.State.Read, false)
+					internal.CheckSimilarPermission(assert, tc.expectedDetails.State.Write, state.State.Write, false)
+					internal.CheckSimilarPermission(assert, tc.expectedDetails.State.Delete, state.State.Delete, false)
+				} else {
+					assert.Len(st.Details(), 0)
+				}
+				return
+			}
+
+			require.NoError(err)
+			require.NotNil(resp)
+			require.ElementsMatch(resp.Objects, tc.expectedObjects)
+		})
+	}
+}

plugin/service/storage/state.go

@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2021, 2026
 // SPDX-License-Identifier: MPL-2.0
 
 package storage
@@ -7,13 +7,17 @@ import (
 	"context"
 	"errors"
 	"fmt"
+	"net/http"
 	"net/url"
+	"time"
 
 	"github.com/aws/aws-sdk-go-v2/aws"
+	"github.com/aws/aws-sdk-go-v2/aws/retry"
+	awshttp "github.com/aws/aws-sdk-go-v2/aws/transport/http"
 	"github.com/aws/aws-sdk-go-v2/service/s3"
 	smithyEndpoints "github.com/aws/smithy-go/endpoints"
-	"github.com/hashicorp/boundary-plugin-aws/internal/credential"
-	"github.com/hashicorp/boundary/sdk/pbs/controller/api/resources/storagebuckets"
+	"repo.anhonesthost.net/CyberCoveLLC/threshold-plugin-aws/internal/credential"
+	"repo.anhonesthost.net/CyberCoveLLC/threshold/sdk/pbs/controller/api/resources/storagebuckets"
 	"google.golang.org/protobuf/types/known/structpb"
 )
 
@@ -22,8 +26,22 @@ type S3API interface {
 	GetObject(ctx context.Context, params *s3.GetObjectInput, optFns ...func(*s3.Options)) (*s3.GetObjectOutput, error)
 	HeadObject(ctx context.Context, params *s3.HeadObjectInput, optFns ...func(*s3.Options)) (*s3.HeadObjectOutput, error)
 	PutObject(ctx context.Context, params *s3.PutObjectInput, optFns ...func(*s3.Options)) (*s3.PutObjectOutput, error)
+	CreateMultipartUpload(ctx context.Context, params *s3.CreateMultipartUploadInput, optFns ...func(*s3.Options)) (*s3.CreateMultipartUploadOutput, error)
+	UploadPart(ctx context.Context, params *s3.UploadPartInput, optFns ...func(*s3.Options)) (*s3.UploadPartOutput, error)
+	CompleteMultipartUpload(ctx context.Context, params *s3.CompleteMultipartUploadInput, optFns ...func(*s3.Options)) (*s3.CompleteMultipartUploadOutput, error)
+	AbortMultipartUpload(ctx context.Context, params *s3.AbortMultipartUploadInput, optFns ...func(*s3.Options)) (*s3.AbortMultipartUploadOutput, error)
 	DeleteObjects(ctx context.Context, params *s3.DeleteObjectsInput, optFns ...func(*s3.Options)) (*s3.DeleteObjectsOutput, error)
 	ListObjectsV2(ctx context.Context, params *s3.ListObjectsV2Input, optFns ...func(*s3.Options)) (*s3.ListObjectsV2Output, error)
+	Credentials() aws.Credentials
+}
+
+type s3Client struct {
+	*s3.Client
+	creds aws.Credentials
+}
+
+func (c *s3Client) Credentials() aws.Credentials {
+	return c.creds
 }
 
 type awsStoragePersistedState struct {
@@ -77,9 +95,9 @@ func (s *awsStoragePersistedState) toProto() (*storagebuckets.StorageBucketPersi
 	return &storagebuckets.StorageBucketPersisted{Data: data}, nil
 }
 
-// S3Client returns a configured S3 client based on the session
+// s3Client returns a configured S3 client based on the session
 // information stored in the state.
-func (s *awsStoragePersistedState) S3Client(ctx context.Context, opt ...s3Option) (S3API, error) {
+func (s *awsStoragePersistedState) s3Client(ctx context.Context, opt ...s3Option) (S3API, error) {
 	opts, err := getOpts(opt...)
 	if err != nil {
 		return nil, fmt.Errorf("error parsing options when fetching S3 client: %w", err)
@@ -101,7 +119,19 @@ func (s *awsStoragePersistedState) S3Client(ctx context.Context, opt ...s3Option
 	if s.testS3APIFunc != nil {
 		return s.testS3APIFunc(*awsCfg)
 	}
-	return s3.NewFromConfig(*awsCfg, s3Opts...), nil
+
+	// Retrieve the credentials provider from the client
+	credsProvider := awsCfg.Credentials
+	creds, err := credsProvider.Retrieve(ctx)
+	if err != nil {
+		return nil, fmt.Errorf("failed to retrieve credentials: %v\n", err)
+	}
+	err = newTransport(awsCfg)
+	if err != nil {
+		return nil, fmt.Errorf("failed to configure new http transport: %v", err)
+	}
+	c := s3.NewFromConfig(*awsCfg, s3Opts...)
+	return &s3Client{Client: c, creds: creds}, nil
 }
 
 // getOpts iterates the inbound s3Options and returns a struct
@@ -125,12 +155,21 @@ type s3Option func(*s3Options) error
 type s3Options struct {
 	withEndpoint     string
 	withDualStack    bool
+	withCacheRefresh bool
 }
 
 func getDefaultS3Options() s3Options {
 	return s3Options{}
 }
 
+// WithCacheRefresh controls if the cache should be forced to refresh
+func WithCacheRefresh(refresh bool) s3Option {
+	return func(o *s3Options) error {
+		o.withCacheRefresh = refresh
+		return nil
+	}
+}
+
 // WithEndpoint contains the endpoint to use
 func WithEndpoint(with string) s3Option {
 	return func(o *s3Options) error {
@@ -174,3 +213,30 @@ func (e *endpointResolver) ResolveEndpoint(ctx context.Context, params s3.Endpoi
 	}
 	return
 }
+
+// newTransport returns an http Transport object. The http transport object utilizes the
+// default transport created by minio. The following transport fields are updated to provide
+// more reliable connectivity when handling larger objects:
+// MaxResponseHeaderBytes is set to 1MiB to prevent header reads from stalling.
+// WriteBufferSize is set to 1MiB, matching the default buffer size used in Boundary storage.
+// ReadBufferSize is set to 1MiB, matching the default buffer size used in Boundary storage.
+// ForceAttemptHTTP2 is set to true, supporting more resilient multiplexing and avoids HOL blocking on retries.
+// IdleConnTimeout is set to 2 minutes.
+func newTransport(cfg *aws.Config) error {
+	if cfg == nil {
+		return fmt.Errorf("missing aws configuration")
+	}
+	cfg.HTTPClient = awshttp.NewBuildableClient().WithTransportOptions(func(transport *http.Transport) {
+		transport.MaxResponseHeaderBytes = 1 << 20  // 1 MiB prevents header read from stalling
+		transport.WriteBufferSize = 1 << 20         // 1 MiB write buffer (default is 4 KiB)
+		transport.ReadBufferSize = 1 << 20          // 1 MiB read buffer (default is 4 KiB)
+		transport.ForceAttemptHTTP2 = true          // enables HTTP/2 where supported more resilient multiplexing, avoids HOL blocking on retries
+		transport.IdleConnTimeout = 2 * time.Minute // double the idle connection timeout, default is 1 minute
+	})
+	cfg.Retryer = func() aws.Retryer {
+		return retry.NewStandard(func(o *retry.StandardOptions) {
+			o.MaxAttempts = 20
+		})
+	}
+	return nil
+}

plugin/service/storage/state_test.go

@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2021, 2026
 // SPDX-License-Identifier: MPL-2.0
 
 package storage
@@ -7,7 +7,7 @@ import (
 	"context"
 	"testing"
 
-	"github.com/hashicorp/boundary-plugin-aws/internal/credential"
+	"repo.anhonesthost.net/CyberCoveLLC/threshold-plugin-aws/internal/credential"
 	"github.com/hashicorp/go-secure-stdlib/awsutil/v2"
 	"github.com/stretchr/testify/require"
 )
@@ -64,7 +64,7 @@ func TestAwsStoragePersistedStateS3Client(t *testing.T) {
 			)
 			require.NoError(err)
 
-			clientRaw, err := state.S3Client(context.Background(), tc.s3Opts...)
+			clientRaw, err := state.s3Client(context.Background(), tc.s3Opts...)
 			require.NoError(err)
 			require.NotNil(clientRaw)
 			client, ok := clientRaw.(*testMockS3)

plugin/service/storage/testing.go

@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2021, 2026
 // SPDX-License-Identifier: MPL-2.0
 
 package storage
@@ -6,6 +6,8 @@ package storage
 import (
 	"bytes"
 	"context"
+	"crypto/sha256"
+	"encoding/base64"
 	"fmt"
 	"io"
 	"testing"
@@ -15,9 +17,9 @@ import (
 	"github.com/aws/aws-sdk-go-v2/service/s3"
 	"github.com/aws/aws-sdk-go-v2/service/sts"
 	"github.com/aws/smithy-go"
-	"github.com/hashicorp/boundary-plugin-aws/internal/credential"
-	"github.com/hashicorp/boundary/sdk/pbs/controller/api/resources/storagebuckets"
-	pb "github.com/hashicorp/boundary/sdk/pbs/plugin"
+	"repo.anhonesthost.net/CyberCoveLLC/threshold-plugin-aws/internal/credential"
+	"repo.anhonesthost.net/CyberCoveLLC/threshold/sdk/pbs/controller/api/resources/storagebuckets"
+	pb "repo.anhonesthost.net/CyberCoveLLC/threshold/sdk/pbs/plugin"
 	"github.com/hashicorp/go-secure-stdlib/awsutil/v2"
 	"github.com/stretchr/testify/require"
 	"google.golang.org/grpc"
@@ -39,6 +41,23 @@ type testMockS3State struct {
 	PutObjectInputParams *s3.PutObjectInput
 	PutObjectBody        []byte
 
+	CreateMultipartUploadCalled      bool
+	CreateMultipartUploadInputParams *s3.CreateMultipartUploadInput
+
+	UploadPartCalled      bool
+	UploadPartCallCount   int
+	UploadPartInputParams []*s3.UploadPartInput
+	// UploadPartBody is the concatenation, in part-number order, of every
+	// part body received by UploadPart. It can be compared against the full
+	// object that was expected to be uploaded.
+	UploadPartBody []byte
+
+	CompleteMultipartUploadCalled      bool
+	CompleteMultipartUploadInputParams *s3.CompleteMultipartUploadInput
+
+	AbortMultipartUploadCalled      bool
+	AbortMultipartUploadInputParams *s3.AbortMultipartUploadInput
+
 	HeadObjectCalled      bool
 	HeadObjectInputParams *s3.HeadObjectInput
 
@@ -57,6 +76,16 @@ func (s *testMockS3State) Reset() {
 	s.PutObjectCalled = false
 	s.PutObjectInputParams = nil
 	s.PutObjectBody = nil
+	s.CreateMultipartUploadCalled = false
+	s.CreateMultipartUploadInputParams = nil
+	s.UploadPartCalled = false
+	s.UploadPartCallCount = 0
+	s.UploadPartInputParams = nil
+	s.UploadPartBody = nil
+	s.CompleteMultipartUploadCalled = false
+	s.CompleteMultipartUploadInputParams = nil
+	s.AbortMultipartUploadCalled = false
+	s.AbortMultipartUploadInputParams = nil
 	s.HeadObjectCalled = false
 	s.HeadObjectInputParams = nil
 	s.ListObjectsV2Called = false
@@ -81,6 +110,19 @@ type testMockS3 struct {
 	PutObjectOutput *s3.PutObjectOutput
 	PutObjectErr    error
 
+	// mocked responses for the multipart upload calls
+	CreateMultipartUploadOutput *s3.CreateMultipartUploadOutput
+	CreateMultipartUploadErr    error
+	UploadPartOutput            *s3.UploadPartOutput
+	UploadPartErr               error
+	// UploadPartErrOnPart, when greater than zero, causes UploadPart to return
+	// UploadPartErr (or a generic error) only for the matching part number.
+	UploadPartErrOnPart           int32
+	CompleteMultipartUploadOutput *s3.CompleteMultipartUploadOutput
+	CompleteMultipartUploadErr    error
+	AbortMultipartUploadOutput    *s3.AbortMultipartUploadOutput
+	AbortMultipartUploadErr       error
+
 	// mocked responses for headObject
 	HeadObjectOutput *s3.HeadObjectOutput
 	HeadObjectErr    error
@@ -114,6 +156,63 @@ func testMockS3WithPutObjectError(e error) testMockS3Option {
 	}
 }
 
+func testMockS3WithCreateMultipartUploadOutput(o *s3.CreateMultipartUploadOutput) testMockS3Option {
+	return func(m *testMockS3) error {
+		m.CreateMultipartUploadOutput = o
+		return nil
+	}
+}
+
+func testMockS3WithCreateMultipartUploadError(e error) testMockS3Option {
+	return func(m *testMockS3) error {
+		m.CreateMultipartUploadErr = e
+		return nil
+	}
+}
+
+func testMockS3WithUploadPartOutput(o *s3.UploadPartOutput) testMockS3Option {
+	return func(m *testMockS3) error {
+		m.UploadPartOutput = o
+		return nil
+	}
+}
+
+func testMockS3WithUploadPartError(e error) testMockS3Option {
+	return func(m *testMockS3) error {
+		m.UploadPartErr = e
+		return nil
+	}
+}
+
+func testMockS3WithUploadPartErrorOnPart(partNumber int32, e error) testMockS3Option {
+	return func(m *testMockS3) error {
+		m.UploadPartErr = e
+		m.UploadPartErrOnPart = partNumber
+		return nil
+	}
+}
+
+func testMockS3WithCompleteMultipartUploadOutput(o *s3.CompleteMultipartUploadOutput) testMockS3Option {
+	return func(m *testMockS3) error {
+		m.CompleteMultipartUploadOutput = o
+		return nil
+	}
+}
+
+func testMockS3WithCompleteMultipartUploadError(e error) testMockS3Option {
+	return func(m *testMockS3) error {
+		m.CompleteMultipartUploadErr = e
+		return nil
+	}
+}
+
+func testMockS3WithAbortMultipartUploadError(e error) testMockS3Option {
+	return func(m *testMockS3) error {
+		m.AbortMultipartUploadErr = e
+		return nil
+	}
+}
+
 func testMockS3WithGetObjectOutput(o *s3.GetObjectOutput) testMockS3Option {
 	return func(m *testMockS3) error {
 		m.GetObjectOutput = o
@@ -255,6 +354,95 @@ func (m *testMockS3) PutObject(ctx context.Context, params *s3.PutObjectInput, o
 	return m.PutObjectOutput, nil
 }
 
+func (m *testMockS3) CreateMultipartUpload(ctx context.Context, params *s3.CreateMultipartUploadInput, optFns ...func(*s3.Options)) (*s3.CreateMultipartUploadOutput, error) {
+	if m.State != nil {
+		m.State.CreateMultipartUploadCalled = true
+		m.State.CreateMultipartUploadInputParams = params
+	}
+
+	if m.CreateMultipartUploadErr != nil {
+		return nil, m.CreateMultipartUploadErr
+	}
+
+	if m.CreateMultipartUploadOutput != nil {
+		return m.CreateMultipartUploadOutput, nil
+	}
+	return &s3.CreateMultipartUploadOutput{
+		UploadId: aws.String("test-upload-id"),
+	}, nil
+}
+
+func (m *testMockS3) UploadPart(ctx context.Context, params *s3.UploadPartInput, optFns ...func(*s3.Options)) (*s3.UploadPartOutput, error) {
+	if m.State != nil {
+		m.State.UploadPartCalled = true
+		m.State.UploadPartCallCount++
+		m.State.UploadPartInputParams = append(m.State.UploadPartInputParams, params)
+	}
+
+	// always drain the body so the part data can be asserted on and so the
+	// reader is not left dangling.
+	var data []byte
+	if params.Body != nil {
+		var err error
+		data, err = io.ReadAll(params.Body)
+		if err != nil {
+			return nil, err
+		}
+		if m.State != nil {
+			m.State.UploadPartBody = append(m.State.UploadPartBody, data...)
+		}
+	}
+
+	if m.UploadPartErr != nil {
+		if m.UploadPartErrOnPart == 0 || (params.PartNumber != nil && *params.PartNumber == m.UploadPartErrOnPart) {
+			return nil, m.UploadPartErr
+		}
+	}
+
+	if m.UploadPartOutput != nil {
+		return m.UploadPartOutput, nil
+	}
+	// echo the supplied part checksum so CompleteMultipartUpload can be built
+	// the way the real service would allow.
+	sum := sha256.Sum256(data)
+	return &s3.UploadPartOutput{
+		ETag:           aws.String(fmt.Sprintf("etag-%d", aws.ToInt32(params.PartNumber))),
+		ChecksumSHA256: aws.String(base64.StdEncoding.EncodeToString(sum[:])),
+	}, nil
+}
+
+func (m *testMockS3) CompleteMultipartUpload(ctx context.Context, params *s3.CompleteMultipartUploadInput, optFns ...func(*s3.Options)) (*s3.CompleteMultipartUploadOutput, error) {
+	if m.State != nil {
+		m.State.CompleteMultipartUploadCalled = true
+		m.State.CompleteMultipartUploadInputParams = params
+	}
+
+	if m.CompleteMultipartUploadErr != nil {
+		return nil, m.CompleteMultipartUploadErr
+	}
+
+	if m.CompleteMultipartUploadOutput != nil {
+		return m.CompleteMultipartUploadOutput, nil
+	}
+	return &s3.CompleteMultipartUploadOutput{}, nil
+}
+
+func (m *testMockS3) AbortMultipartUpload(ctx context.Context, params *s3.AbortMultipartUploadInput, optFns ...func(*s3.Options)) (*s3.AbortMultipartUploadOutput, error) {
+	if m.State != nil {
+		m.State.AbortMultipartUploadCalled = true
+		m.State.AbortMultipartUploadInputParams = params
+	}
+
+	if m.AbortMultipartUploadErr != nil {
+		return nil, m.AbortMultipartUploadErr
+	}
+
+	if m.AbortMultipartUploadOutput != nil {
+		return m.AbortMultipartUploadOutput, nil
+	}
+	return &s3.AbortMultipartUploadOutput{}, nil
+}
+
 func (m *testMockS3) ListObjectsV2(ctx context.Context, params *s3.ListObjectsV2Input, optFns ...func(*s3.Options)) (*s3.ListObjectsV2Output, error) {
 	if m.State != nil {
 		m.State.ListObjectsV2Called = true

testing/e2e_host_assumerole_test.go

@@ -0,0 +1,304 @@
+// Copyright IBM Corp. 2021, 2026
+// SPDX-License-Identifier: MPL-2.0
+
+package testing
+
+// This file contains table-driven test infrastructure for AssumeRole and
+// cross-role (two-hop) Dynamic Host Catalog scenarios. Each plugin operation
+// has a corresponding case type and runner function. The orchestrator in
+// e2e_host_test.go populates the case tables using the Terraform outputs.
+
+import (
+	"context"
+	"fmt"
+	"strings"
+	"testing"
+
+	"repo.anhonesthost.net/CyberCoveLLC/threshold-plugin-aws/internal/credential"
+	"repo.anhonesthost.net/CyberCoveLLC/threshold-plugin-aws/plugin/service/host"
+	"repo.anhonesthost.net/CyberCoveLLC/threshold/sdk/pbs/controller/api/resources/hostcatalogs"
+	"repo.anhonesthost.net/CyberCoveLLC/threshold/sdk/pbs/controller/api/resources/hostsets"
+	pb "repo.anhonesthost.net/CyberCoveLLC/threshold/sdk/pbs/plugin"
+	"github.com/stretchr/testify/require"
+	"google.golang.org/grpc/status"
+	"google.golang.org/protobuf/types/known/structpb"
+)
+
+// ---------------------------------------------------------------------------
+// Attr builders
+// ---------------------------------------------------------------------------
+
+// roleArnAttrs builds catalog attributes for a single-hop AssumeRole catalog.
+func roleArnAttrs(region, roleArn string) map[string]any {
+	return map[string]any{
+		credential.ConstRegion:                    region,
+		credential.ConstDisableCredentialRotation: true,
+		credential.ConstRoleArn:                   roleArn,
+	}
+}
+
+// crossRoleAttrs builds catalog attributes for a two-hop cross-role catalog.
+func crossRoleAttrs(region, principalRoleArn, targetRoleArn string) map[string]any {
+	return map[string]any{
+		credential.ConstRegion:                    region,
+		credential.ConstDisableCredentialRotation: true,
+		credential.ConstRoleArn:                   principalRoleArn,
+		credential.ConstTargetRoleArn:             targetRoleArn,
+	}
+}
+
+// tagFilterSetAttrs builds set attributes with a single tag-key filter.
+func tagFilterSetAttrs(tags []string) map[string]any {
+	return map[string]any{
+		host.ConstDescribeInstancesFilters: []any{fmt.Sprintf("tag-key=%s", strings.Join(tags, ","))},
+	}
+}
+
+// requireTagInstancesMatchProvisioned asserts that every instance ID in tagInstancesMap
+// is present in provisionedIds (the raw []any slice from a Terraform output).
+func requireTagInstancesMatchProvisioned(t *testing.T, provisionedIds []any, tagInstancesMap map[string][]string) {
+	t.Helper()
+	idSet := make(map[string]struct{}, len(provisionedIds))
+	for _, id := range provisionedIds {
+		idSet[id.(string)] = struct{}{}
+	}
+	for tag, ids := range tagInstancesMap {
+		for _, id := range ids {
+			require.Contains(t, idSet, id, "instance ID %s in tag bucket %q was not provisioned by Terraform", id, tag)
+		}
+	}
+}
+
+// buildExpectedTagInstancesMap builds a map of tag key to instance IDs from a Terraform instance_tags output map.
+func buildExpectedTagInstancesMap(rawTags map[string]any, expectedTags []string) map[string][]string {
+	tagMap := make(map[string][]string)
+	for instanceId, instanceTags := range rawTags {
+		for tagKey := range instanceTags.(map[string]any) {
+			for _, expectedTag := range expectedTags {
+				if tagKey == expectedTag {
+					tagMap[tagKey] = append(tagMap[tagKey], instanceId)
+				}
+			}
+		}
+	}
+	return tagMap
+}
+
+// ---------------------------------------------------------------------------
+// Table-driven runners
+// ---------------------------------------------------------------------------
+
+type onCreateCatalogCase struct {
+	name         string
+	catalogAttrs map[string]any
+	wantErr      string // empty = expect success with empty persisted secrets
+}
+
+func testOnCreateCatalogCases(ctx context.Context, t *testing.T, p *host.HostPlugin, cases []onCreateCatalogCase) {
+	t.Helper()
+	for _, tc := range cases {
+		t.Run(tc.name, func(t *testing.T) {
+			t.Helper()
+			require := require.New(t)
+			attrs, err := structpb.NewStruct(tc.catalogAttrs)
+			require.NoError(err)
+			resp, err := p.OnCreateCatalog(ctx, &pb.OnCreateCatalogRequest{
+				Catalog: &hostcatalogs.HostCatalog{
+					Attrs: &hostcatalogs.HostCatalog_Attributes{Attributes: attrs},
+				},
+			})
+			if tc.wantErr != "" {
+				require.Error(err)
+				st, ok := status.FromError(err)
+				require.True(ok)
+				require.Contains(st.Message(), tc.wantErr)
+				return
+			}
+			require.NoError(err)
+			require.NotNil(resp)
+			// Dynamic credentials are never stored — persisted secrets should be empty.
+			require.Empty(resp.GetPersisted().GetSecrets().GetFields())
+		})
+	}
+}
+
+type onUpdateCatalogCase struct {
+	name         string
+	catalogAttrs map[string]any // used for both current and new when currentAttrs/newAttrs are nil
+	currentAttrs map[string]any // optional: override current catalog attrs
+	newAttrs     map[string]any // optional: override new catalog attrs
+	wantErr      string
+}
+
+func testOnUpdateCatalogCases(ctx context.Context, t *testing.T, p *host.HostPlugin, cases []onUpdateCatalogCase) {
+	t.Helper()
+	for _, tc := range cases {
+		t.Run(tc.name, func(t *testing.T) {
+			t.Helper()
+			require := require.New(t)
+			currentRaw := tc.catalogAttrs
+			if tc.currentAttrs != nil {
+				currentRaw = tc.currentAttrs
+			}
+			newRaw := tc.catalogAttrs
+			if tc.newAttrs != nil {
+				newRaw = tc.newAttrs
+			}
+			currentAttrs, err := structpb.NewStruct(currentRaw)
+			require.NoError(err)
+			newAttrs, err := structpb.NewStruct(newRaw)
+			require.NoError(err)
+			resp, err := p.OnUpdateCatalog(ctx, &pb.OnUpdateCatalogRequest{
+				CurrentCatalog: &hostcatalogs.HostCatalog{
+					Attrs: &hostcatalogs.HostCatalog_Attributes{Attributes: currentAttrs},
+				},
+				NewCatalog: &hostcatalogs.HostCatalog{
+					Attrs: &hostcatalogs.HostCatalog_Attributes{Attributes: newAttrs},
+				},
+				Persisted: &pb.HostCatalogPersisted{},
+			})
+			if tc.wantErr != "" {
+				require.Error(err)
+				st, ok := status.FromError(err)
+				require.True(ok)
+				require.Contains(st.Message(), tc.wantErr)
+				return
+			}
+			require.NoError(err)
+			require.NotNil(resp)
+			// Dynamic credentials are never stored — persisted secrets should be empty.
+			require.Empty(resp.GetPersisted().GetSecrets().GetFields())
+		})
+	}
+}
+
+type onSetCase struct {
+	name         string
+	catalogAttrs map[string]any
+	tags         []string // nil = no filter (empty set attrs)
+	wantErr      string
+}
+
+func testOnCreateSetCases(ctx context.Context, t *testing.T, p *host.HostPlugin, cases []onSetCase) {
+	t.Helper()
+	for _, tc := range cases {
+		t.Run(tc.name, func(t *testing.T) {
+			t.Helper()
+			require := require.New(t)
+			catalogAttrs, err := structpb.NewStruct(tc.catalogAttrs)
+			require.NoError(err)
+			setRaw := map[string]any{host.ConstDescribeInstancesFilters: []any{}}
+			if len(tc.tags) > 0 {
+				setRaw = tagFilterSetAttrs(tc.tags)
+			}
+			setAttrs, err := structpb.NewStruct(setRaw)
+			require.NoError(err)
+			resp, err := p.OnCreateSet(ctx, &pb.OnCreateSetRequest{
+				Catalog:   &hostcatalogs.HostCatalog{Attrs: &hostcatalogs.HostCatalog_Attributes{Attributes: catalogAttrs}},
+				Set:       &hostsets.HostSet{Attrs: &hostsets.HostSet_Attributes{Attributes: setAttrs}},
+				Persisted: &pb.HostCatalogPersisted{},
+			})
+			if tc.wantErr != "" {
+				require.Error(err)
+				st, ok := status.FromError(err)
+				require.True(ok)
+				require.Contains(st.Message(), tc.wantErr)
+				return
+			}
+			require.NoError(err)
+			require.NotNil(resp)
+		})
+	}
+}
+
+func testOnUpdateSetCases(ctx context.Context, t *testing.T, p *host.HostPlugin, cases []onSetCase) {
+	t.Helper()
+	for _, tc := range cases {
+		t.Run(tc.name, func(t *testing.T) {
+			t.Helper()
+			require := require.New(t)
+			catalogAttrs, err := structpb.NewStruct(tc.catalogAttrs)
+			require.NoError(err)
+			setRaw := map[string]any{host.ConstDescribeInstancesFilters: []any{}}
+			if len(tc.tags) > 0 {
+				setRaw = tagFilterSetAttrs(tc.tags)
+			}
+			setAttrs, err := structpb.NewStruct(setRaw)
+			require.NoError(err)
+			set := &hostsets.HostSet{Attrs: &hostsets.HostSet_Attributes{Attributes: setAttrs}}
+			resp, err := p.OnUpdateSet(ctx, &pb.OnUpdateSetRequest{
+				Catalog:    &hostcatalogs.HostCatalog{Attrs: &hostcatalogs.HostCatalog_Attributes{Attributes: catalogAttrs}},
+				CurrentSet: set,
+				NewSet:     set,
+				Persisted:  &pb.HostCatalogPersisted{},
+			})
+			if tc.wantErr != "" {
+				require.Error(err)
+				st, ok := status.FromError(err)
+				require.True(ok)
+				require.Contains(st.Message(), tc.wantErr)
+				return
+			}
+			require.NoError(err)
+			require.NotNil(resp)
+		})
+	}
+}
+
+type listHostsCase struct {
+	name         string
+	catalogAttrs map[string]any
+	tags         []string
+	expected     map[string][]string // nil = don't assert instances (error cases)
+	wantErr      string
+}
+
+func testListHostsCases(ctx context.Context, t *testing.T, p *host.HostPlugin, cases []listHostsCase) {
+	t.Helper()
+	for _, tc := range cases {
+		t.Run(tc.name, func(t *testing.T) {
+			t.Helper()
+			require := require.New(t)
+			catalogAttrs, err := structpb.NewStruct(tc.catalogAttrs)
+			require.NoError(err)
+			sets := make([]*hostsets.HostSet, len(tc.tags))
+			for i, tag := range tc.tags {
+				setAttrs, err := structpb.NewStruct(map[string]any{
+					host.ConstDescribeInstancesFilters: []any{fmt.Sprintf("tag-key=%s", tag)},
+				})
+				require.NoError(err)
+				sets[i] = &hostsets.HostSet{
+					Id:    fmt.Sprintf("hostset-%d", i),
+					Attrs: &hostsets.HostSet_Attributes{Attributes: setAttrs},
+				}
+			}
+			resp, err := p.ListHosts(ctx, &pb.ListHostsRequest{
+				Catalog:   &hostcatalogs.HostCatalog{Attrs: &hostcatalogs.HostCatalog_Attributes{Attributes: catalogAttrs}},
+				Sets:      sets,
+				Persisted: &pb.HostCatalogPersisted{},
+			})
+			if tc.wantErr != "" {
+				require.Error(err)
+				st, ok := status.FromError(err)
+				require.True(ok)
+				require.Contains(st.Message(), tc.wantErr)
+				return
+			}
+			require.NoError(err)
+			require.NotNil(resp)
+			expectedInstances := make(map[string][]string)
+			for i, tag := range tc.tags {
+				for _, instanceId := range tc.expected[tag] {
+					expectedInstances[instanceId] = append(expectedInstances[instanceId], fmt.Sprintf("hostset-%d", i))
+				}
+			}
+			actualInstances := make(map[string][]string)
+			for _, h := range resp.GetHosts() {
+				actualInstances[h.ExternalId] = h.SetIds
+			}
+			require.Equal(expectedInstances, actualInstances)
+			t.Logf("success: %d hosts matched", len(actualInstances))
+		})
+	}
+}
+

testing/e2e_host_static_test.go

@@ -0,0 +1,396 @@
+// Copyright IBM Corp. 2021, 2026
+// SPDX-License-Identifier: MPL-2.0
+
+package testing
+
+// This file contains helper functions for the static-credential (access key /
+// secret access key) test paths exercised by TestHostPlugin in e2e_host_test.go.
+
+import (
+	"context"
+	"fmt"
+	"strings"
+	"testing"
+	"time"
+
+	"repo.anhonesthost.net/CyberCoveLLC/threshold-plugin-aws/internal/credential"
+	"repo.anhonesthost.net/CyberCoveLLC/threshold-plugin-aws/plugin/service/host"
+	"repo.anhonesthost.net/CyberCoveLLC/threshold/sdk/pbs/controller/api/resources/hostcatalogs"
+	"repo.anhonesthost.net/CyberCoveLLC/threshold/sdk/pbs/controller/api/resources/hostsets"
+	pb "repo.anhonesthost.net/CyberCoveLLC/threshold/sdk/pbs/plugin"
+	"github.com/stretchr/testify/require"
+	"google.golang.org/protobuf/types/known/structpb"
+)
+
+func testPluginOnCreateCatalog(ctx context.Context, t *testing.T, p *host.HostPlugin, region, accessKeyId, secretAccessKey string, rotate bool) (string, string) {
+	t.Helper()
+	t.Logf("testing OnCreateCatalog (region=%s, rotate=%t)", region, rotate)
+	require := require.New(t)
+
+	reqAttrs, err := structpb.NewStruct(map[string]any{
+		credential.ConstRegion:                    region,
+		credential.ConstDisableCredentialRotation: !rotate,
+	})
+	require.NoError(err)
+	reqSecrets, err := structpb.NewStruct(map[string]any{
+		credential.ConstAccessKeyId:     accessKeyId,
+		credential.ConstSecretAccessKey: secretAccessKey,
+	})
+	require.NoError(err)
+	request := &pb.OnCreateCatalogRequest{
+		Catalog: &hostcatalogs.HostCatalog{
+			Attrs: &hostcatalogs.HostCatalog_Attributes{
+				Attributes: reqAttrs,
+			},
+			Secrets: reqSecrets,
+		},
+	}
+	response, err := p.OnCreateCatalog(ctx, request)
+	require.NoError(err)
+	require.NotNil(response)
+	persisted := response.GetPersisted()
+	require.NotNil(persisted)
+	return validatePersistedSecrets(t, persisted.GetSecrets(), accessKeyId, secretAccessKey, rotate)
+}
+
+func testPluginOnUpdateCatalog(
+	ctx context.Context, t *testing.T, p *host.HostPlugin,
+	region, currentAccessKeyId, currentSecretAccessKey, newAccessKeyId, newSecretAccessKey string,
+	rotated, rotate bool,
+) (string, string) {
+	t.Helper()
+	t.Logf("testing OnUpdateCatalog (region=%s, newcreds=%t, rotated=%t, rotate=%t)", region, newAccessKeyId != "" && newSecretAccessKey != "", rotated, rotate)
+	require := require.New(t)
+
+	// Take a timestamp of the current time to get a point in time to
+	// reference, ensuring that we are updating credential rotation
+	// timestamps.
+	currentCredsLastRotatedTime := time.Now()
+
+	reqCurrentAttrs, err := structpb.NewStruct(map[string]any{
+		credential.ConstRegion:                    region,
+		credential.ConstDisableCredentialRotation: !rotated,
+	})
+	require.NoError(err)
+	reqNewAttrs, err := structpb.NewStruct(map[string]any{
+		credential.ConstRegion:                    region,
+		credential.ConstDisableCredentialRotation: !rotate,
+	})
+	require.NoError(err)
+	var reqSecrets *structpb.Struct
+	if newAccessKeyId != "" && newSecretAccessKey != "" {
+		reqSecrets, err = structpb.NewStruct(map[string]any{
+			credential.ConstAccessKeyId:     newAccessKeyId,
+			credential.ConstSecretAccessKey: newSecretAccessKey,
+		})
+		require.NoError(err)
+	}
+	reqPersistedSecrets, err := structpb.NewStruct(map[string]any{
+		credential.ConstAccessKeyId:     currentAccessKeyId,
+		credential.ConstSecretAccessKey: currentSecretAccessKey,
+		credential.ConstCredsLastRotatedTime: func() string {
+			if rotated {
+				return currentCredsLastRotatedTime.Format(time.RFC3339Nano)
+			}
+
+			return (time.Time{}).Format(time.RFC3339Nano)
+		}(),
+	})
+	require.NoError(err)
+	require.NotNil(reqPersistedSecrets)
+	request := &pb.OnUpdateCatalogRequest{
+		CurrentCatalog: &hostcatalogs.HostCatalog{
+			Attrs: &hostcatalogs.HostCatalog_Attributes{
+				Attributes: reqCurrentAttrs,
+			},
+		},
+		NewCatalog: &hostcatalogs.HostCatalog{
+			Attrs: &hostcatalogs.HostCatalog_Attributes{
+				Attributes: reqNewAttrs,
+			},
+			Secrets: reqSecrets,
+		},
+		Persisted: &pb.HostCatalogPersisted{
+			Secrets: reqPersistedSecrets,
+		},
+	}
+	response, err := p.OnUpdateCatalog(ctx, request)
+	require.NoError(err)
+	require.NotNil(response)
+	persisted := response.GetPersisted()
+	require.NotNil(persisted)
+	return validateUpdateSecrets(t, persisted.GetSecrets(), currentCredsLastRotatedTime, currentAccessKeyId, currentSecretAccessKey, newAccessKeyId, newSecretAccessKey, rotated, rotate)
+}
+
+func testPluginOnDeleteCatalog(ctx context.Context, t *testing.T, p *host.HostPlugin, region, accessKeyId, secretAccessKey string, rotated bool) {
+	t.Helper()
+	t.Logf("testing OnDeleteCatalog (region=%s, rotated=%t)", region, rotated)
+	require := require.New(t)
+
+	reqAttrs, err := structpb.NewStruct(map[string]any{
+		credential.ConstRegion:                    region,
+		credential.ConstDisableCredentialRotation: !rotated,
+	})
+	require.NoError(err)
+	reqSecrets, err := structpb.NewStruct(map[string]any{
+		credential.ConstAccessKeyId:     accessKeyId,
+		credential.ConstSecretAccessKey: secretAccessKey,
+	})
+	require.NoError(err)
+	reqPersistedSecrets, err := structpb.NewStruct(map[string]any{
+		credential.ConstAccessKeyId:     accessKeyId,
+		credential.ConstSecretAccessKey: secretAccessKey,
+		credential.ConstCredsLastRotatedTime: func() string {
+			if rotated {
+				return time.Now().Format(time.RFC3339Nano)
+			}
+
+			return (time.Time{}).Format(time.RFC3339Nano)
+		}(),
+	})
+	require.NoError(err)
+	request := &pb.OnDeleteCatalogRequest{
+		Catalog: &hostcatalogs.HostCatalog{
+			Attrs: &hostcatalogs.HostCatalog_Attributes{
+				Attributes: reqAttrs,
+			},
+			Secrets: reqSecrets,
+		},
+		Persisted: &pb.HostCatalogPersisted{
+			Secrets: reqPersistedSecrets,
+		},
+	}
+	response, err := p.OnDeleteCatalog(ctx, request)
+	require.NoError(err)
+	require.NotNil(response)
+
+	// We want to test the validity of the credentials post-deletion.
+	if rotated {
+		// The credentials should no longer be valid.
+		requireCredentialsInvalid(t, accessKeyId, secretAccessKey)
+	} else {
+		// The credentials should still be valid. Sleep 10s first just to
+		// be sure, since we're not rotating.
+		time.Sleep(time.Second * 10)
+		requireCredentialsValid(t, accessKeyId, secretAccessKey)
+	}
+}
+
+func testPluginOnCreateUpdateSet(ctx context.Context, t *testing.T, p *host.HostPlugin, region, accessKeyId, secretAccessKey string, tags []string) {
+	t.Helper()
+	t.Logf("testing OnCreateSet (region=%s, tags=%v)", region, tags)
+	require := require.New(t)
+	catalogAttrs, err := structpb.NewStruct(map[string]any{
+		credential.ConstRegion:                    region,
+		credential.ConstDisableCredentialRotation: true, // Note that this does nothing in sets, but just noting for tests
+	})
+	require.NoError(err)
+	setAttrs, err := structpb.NewStruct(map[string]any{
+		host.ConstDescribeInstancesFilters: []any{fmt.Sprintf("tag-key=%s", strings.Join(tags, ","))},
+	})
+	require.NoError(err)
+	reqPersistedSecrets, err := structpb.NewStruct(map[string]any{
+		credential.ConstAccessKeyId:          accessKeyId,
+		credential.ConstSecretAccessKey:      secretAccessKey,
+		credential.ConstCredsLastRotatedTime: (time.Time{}).Format(time.RFC3339Nano),
+	})
+	require.NoError(err)
+	createRequest := &pb.OnCreateSetRequest{
+		Catalog: &hostcatalogs.HostCatalog{
+			Attrs: &hostcatalogs.HostCatalog_Attributes{
+				Attributes: catalogAttrs,
+			},
+		},
+		Set: &hostsets.HostSet{
+			Attrs: &hostsets.HostSet_Attributes{
+				Attributes: setAttrs,
+			},
+		},
+		Persisted: &pb.HostCatalogPersisted{
+			Secrets: reqPersistedSecrets,
+		},
+	}
+	createResponse, err := p.OnCreateSet(ctx, createRequest)
+	require.NoError(err)
+	require.NotNil(createResponse)
+
+	// Do an update test in the same function, as it's pretty much the
+	// same function right now.
+	t.Logf("testing OnUpdateSet (region=%s, tags=%v)", region, tags)
+	updateRequest := &pb.OnUpdateSetRequest{
+		Catalog: &hostcatalogs.HostCatalog{
+			Attrs: &hostcatalogs.HostCatalog_Attributes{
+				Attributes: catalogAttrs,
+			},
+		},
+		CurrentSet: &hostsets.HostSet{
+			Attrs: &hostsets.HostSet_Attributes{
+				Attributes: setAttrs,
+			},
+		},
+		NewSet: &hostsets.HostSet{
+			Attrs: &hostsets.HostSet_Attributes{
+				Attributes: setAttrs,
+			},
+		},
+		Persisted: &pb.HostCatalogPersisted{
+			Secrets: reqPersistedSecrets,
+		},
+	}
+	updateResponse, err := p.OnUpdateSet(ctx, updateRequest)
+	require.NoError(err)
+	require.NotNil(updateResponse)
+}
+
+func testPluginListHosts(ctx context.Context, t *testing.T, p *host.HostPlugin, region, accessKeyId, secretAccessKey string, tags []string, expected map[string][]string) {
+	t.Helper()
+	t.Logf("testing ListHosts (region=%s, tags=%v)", region, tags)
+	require := require.New(t)
+	catalogAttrs, err := structpb.NewStruct(map[string]any{
+		credential.ConstRegion:                    region,
+		credential.ConstDisableCredentialRotation: true, // Note that this does nothing in sets, but just noting for tests
+	})
+	require.NoError(err)
+	sets := make([]*hostsets.HostSet, len(tags))
+	for i, tag := range tags {
+		setAttrs, err := structpb.NewStruct(map[string]any{
+			host.ConstDescribeInstancesFilters: []any{fmt.Sprintf("tag-key=%s", tag)},
+		})
+		require.NoError(err)
+		sets[i] = &hostsets.HostSet{
+			Id: fmt.Sprintf("hostset-%d", i),
+			Attrs: &hostsets.HostSet_Attributes{
+				Attributes: setAttrs,
+			},
+		}
+	}
+	reqPersistedSecrets, err := structpb.NewStruct(map[string]any{
+		credential.ConstAccessKeyId:          accessKeyId,
+		credential.ConstSecretAccessKey:      secretAccessKey,
+		credential.ConstCredsLastRotatedTime: (time.Time{}).Format(time.RFC3339Nano),
+	})
+	require.NoError(err)
+	request := &pb.ListHostsRequest{
+		Catalog: &hostcatalogs.HostCatalog{
+			Attrs: &hostcatalogs.HostCatalog_Attributes{
+				Attributes: catalogAttrs,
+			},
+		},
+		Sets: sets,
+		Persisted: &pb.HostCatalogPersisted{
+			Secrets: reqPersistedSecrets,
+		},
+	}
+	response, err := p.ListHosts(ctx, request)
+	require.NoError(err)
+	require.NotNil(response)
+
+	// Validate the returned instances by ID. Assemble the instance
+	// details from the expected set.
+	expectedInstances := make(map[string][]string)
+	for i, tag := range tags {
+		for _, instanceId := range expected[tag] {
+			expectedInstances[instanceId] = append(expectedInstances[instanceId], fmt.Sprintf("hostset-%d", i))
+		}
+	}
+
+	// Take the returned hosts by ID and create the same kind of map.
+	actualInstances := make(map[string][]string)
+	for _, host := range response.GetHosts() {
+		actualInstances[host.ExternalId] = host.SetIds
+	}
+
+	// Compare
+	require.Equal(expectedInstances, actualInstances)
+	// Success
+	t.Logf("testing ListHosts: success (region=%s, tags=%v, expected/actual=(len=%d, ids=%s))", region, tags, len(actualInstances), actualInstances)
+}
+
+func testInstanceAddressesOnlyListHosts(ctx context.Context, t *testing.T, p *host.HostPlugin, tf *TestTerraformer, region, accessKeyId, secretAccessKey string) {
+	t.Helper()
+	t.Logf("testing testInstanceAddressesOnlyListHosts")
+
+	// Get the instance details from tf output
+	instanceID, err := tf.GetOutputString("multi_address_instance_id")
+	require.NoError(t, err)
+	primaryAddresses, err := tf.GetOutputMap("multi_address_primary_addresses")
+	require.NoError(t, err)
+	secondaryAddresses, err := tf.GetOutputMap("multi_address_secondary_addresses")
+	require.NoError(t, err)
+
+	var primary, allAddresses []string
+	for _, addr := range primaryAddresses {
+		primary = append(primary, addr.(string))
+	}
+	allAddresses = append(allAddresses, primary...)
+	for _, addr := range secondaryAddresses {
+		allAddresses = append(allAddresses, addr.(string))
+	}
+
+	cases := []struct {
+		name                  string
+		instanceAddressesOnly bool
+		expectedIPs           []string
+	}{
+		{
+			name:        "all addresses",
+			expectedIPs: allAddresses,
+		},
+		{
+			name:                  "instance addresses only",
+			instanceAddressesOnly: true,
+			expectedIPs:           primary,
+		},
+	}
+
+	for _, tc := range cases {
+		tc := tc
+		t.Run(tc.name, func(t *testing.T) {
+			require := require.New(t)
+
+			catalogAttrMap := map[string]any{
+				credential.ConstRegion:                    region,
+				credential.ConstDisableCredentialRotation: true,
+			}
+			if tc.instanceAddressesOnly {
+				catalogAttrMap[host.ConstInstanceAddressesOnly] = true
+			}
+
+			catalogAttrs, err := structpb.NewStruct(catalogAttrMap)
+			require.NoError(err)
+			setAttrs, err := structpb.NewStruct(map[string]any{
+				host.ConstDescribeInstancesFilters: []any{fmt.Sprintf("instance-id=%s", instanceID)},
+			})
+			require.NoError(err)
+
+			reqPersistedSecrets, err := structpb.NewStruct(map[string]any{
+				credential.ConstAccessKeyId:          accessKeyId,
+				credential.ConstSecretAccessKey:      secretAccessKey,
+				credential.ConstCredsLastRotatedTime: (time.Time{}).Format(time.RFC3339Nano),
+			})
+			require.NoError(err)
+			request := &pb.ListHostsRequest{
+				Catalog: &hostcatalogs.HostCatalog{
+					Attrs: &hostcatalogs.HostCatalog_Attributes{
+						Attributes: catalogAttrs,
+					},
+				},
+				Sets: []*hostsets.HostSet{{
+					Id:    "hostset-0",
+					Attrs: &hostsets.HostSet_Attributes{Attributes: setAttrs},
+				}},
+				Persisted: &pb.HostCatalogPersisted{
+					Secrets: reqPersistedSecrets,
+				},
+			}
+
+			response, err := p.ListHosts(ctx, request)
+			require.NoError(err)
+			require.Len(response.GetHosts(), 1)
+			hostResp := response.GetHosts()[0]
+
+			require.Equal(instanceID, hostResp.ExternalId)
+			require.ElementsMatch(hostResp.IpAddresses, tc.expectedIPs)
+		})
+	}
+}

testing/e2e_host_test.go

@@ -1,29 +1,30 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2021, 2026
 // SPDX-License-Identifier: MPL-2.0
 
 package testing
 
+// This file contains the TestHostPlugin orchestrator. It deploys the Terraform
+// workspace, collects outputs, and calls the per-credential-type helper
+// functions defined in e2e_host_static_test.go and e2e_host_assumerole_test.go.
+
 import (
 	"context"
-	"fmt"
 	"os"
-	"strings"
 	"testing"
-	"time"
 
-	"github.com/hashicorp/boundary-plugin-aws/internal/credential"
-	"github.com/hashicorp/boundary-plugin-aws/plugin/service/host"
-	"github.com/hashicorp/boundary/sdk/pbs/controller/api/resources/hostcatalogs"
-	"github.com/hashicorp/boundary/sdk/pbs/controller/api/resources/hostsets"
-	pb "github.com/hashicorp/boundary/sdk/pbs/plugin"
+	"repo.anhonesthost.net/CyberCoveLLC/threshold-plugin-aws/plugin/service/host"
 	"github.com/stretchr/testify/require"
-	"google.golang.org/protobuf/types/known/structpb"
+)
+
+const (
+	envTargetAccessKeyId     = "TARGET_AWS_ACCESS_KEY_ID"
+	envTargetSecretAccessKey = "TARGET_AWS_SECRET_ACCESS_KEY"
+	envTargetSessionToken    = "TARGET_AWS_SESSION_TOKEN"
+	envTargetRegion          = "TARGET_AWS_REGION"
 )
 
 const expectedEc2InstanceCount = 5
 
-var expectedTags = []string{"foo", "bar", "baz"}
-
 func TestHostPlugin(t *testing.T) {
 	region := os.Getenv("AWS_REGION")
 	if region == "" {
@@ -37,7 +38,29 @@ func TestHostPlugin(t *testing.T) {
 	}
 
 	require := require.New(t)
-	tf, err := NewTestTerraformer("testdata/host")
+
+	// Collect cross-account credentials up front so they can be passed as
+	// Terraform variables. The cross-account section is skipped (not failed)
+	// when these are absent, but we need the values available before Deploy.
+	targetAccessKeyId := os.Getenv(envTargetAccessKeyId)
+	targetSecretAccessKey := os.Getenv(envTargetSecretAccessKey)
+	targetSessionToken := os.Getenv(envTargetSessionToken)
+	targetRegion := os.Getenv(envTargetRegion)
+	if targetRegion == "" {
+		targetRegion = region
+	}
+
+	tfVars := map[string]string{}
+	if targetAccessKeyId != "" && targetSecretAccessKey != "" {
+		tfVars["target_access_key_id"] = targetAccessKeyId
+		tfVars["target_secret_access_key"] = targetSecretAccessKey
+		tfVars["target_region"] = targetRegion
+		if targetSessionToken != "" {
+			tfVars["target_session_token"] = targetSessionToken
+		}
+	}
+
+	tf, err := NewTestTerraformer("testdata/host", tfVars)
 	require.NoError(err)
 	require.NotNil(tf)
 
@@ -80,6 +103,14 @@ func TestHostPlugin(t *testing.T) {
 	require.NoError(err)
 	require.Len(ec2InstanceTags, expectedEc2InstanceCount)
 
+	rawExpectedTags, err := tf.GetOutputSlice("instance_tag_keys")
+	require.NoError(err)
+	require.Len(rawExpectedTags, 3)
+	expectedTags := make([]string, 0, len(rawExpectedTags))
+	for _, rawExpectedTag := range rawExpectedTags {
+		expectedTags = append(expectedTags, rawExpectedTag.(string))
+	}
+
 	// Start the workflow now. Set up the host catalog. Note that this
 	// will cause the state to go out of drift above in the sense that
 	// the access key ID/secret access key will no longer be valid. We
@@ -131,25 +162,18 @@ func TestHostPlugin(t *testing.T) {
 	// Reassign the keyid and secret first.
 	keyid, secret = iamAccessKeyIds[5].(string), iamSecretAccessKeys[5].(string)
 	// Process the collection of instances and index by expected tag names.
-	expectedTagInstancesMap := make(map[string][]string)
-	for instanceId, instanceTags := range ec2InstanceTags {
-		for tagKey := range instanceTags.(map[string]any) {
-			for _, expectedTag := range expectedTags {
-				if tagKey == expectedTag {
-					expectedTagInstancesMap[tagKey] = append(expectedTagInstancesMap[tagKey], instanceId)
-				}
-			}
-		}
-	}
+	expectedTagInstancesMap := buildExpectedTagInstancesMap(ec2InstanceTags, expectedTags)
+
+	requireTagInstancesMatchProvisioned(t, ec2InstanceIds, expectedTagInstancesMap)
 
 	cases := [][]string{
-		{"foo"},
-		{"bar"},
-		{"baz"},
-		{"foo", "bar"},
-		{"foo", "baz"},
-		{"bar", "baz"},
-		{"foo", "bar", "baz"},
+		{expectedTags[0]},
+		{expectedTags[1]},
+		{expectedTags[2]},
+		{expectedTags[0], expectedTags[1]},
+		{expectedTags[0], expectedTags[2]},
+		{expectedTags[1], expectedTags[2]},
+		{expectedTags[0], expectedTags[1], expectedTags[2]},
 	}
 
 	for _, tc := range cases {
@@ -159,288 +183,165 @@ func TestHostPlugin(t *testing.T) {
 		testPluginListHosts(ctx, t, p, region, keyid, secret, tc, expectedTagInstancesMap)
 		// TODO: add OnDeleteSet if it needs to be implemented
 	}
-}
 
-func testPluginOnCreateCatalog(ctx context.Context, t *testing.T, p *host.HostPlugin, region, accessKeyId, secretAccessKey string, rotate bool) (string, string) {
-	t.Helper()
-	t.Logf("testing OnCreateCatalog (region=%s, rotate=%t)", region, rotate)
-	require := require.New(t)
+	// finally lets test instance_addresses_only catalog attribute correctly syncs only instance addresses
+	testInstanceAddressesOnlyListHosts(ctx, t, p, tf, region, keyid, secret)
 
-	reqAttrs, err := structpb.NewStruct(map[string]any{
-		credential.ConstRegion:                    region,
-		credential.ConstDisableCredentialRotation: !rotate,
+	// ********************
+	// * AssumeRole - Happy Path & Error Cases
+	// ********************
+	assumeRoleArn, err := tf.GetOutputString("assume_role_arn")
+	require.NoError(err)
+
+	noTrustRoleArn, err := tf.GetOutputString("assume_role_no_trust_arn")
+	require.NoError(err)
+
+	missingPermRoleArn, err := tf.GetOutputString("assume_role_no_ec2_permission_arn")
+	require.NoError(err)
+
+	testOnCreateCatalogCases(ctx, t, p, []onCreateCatalogCase{
+		{name: "assume role happy path", catalogAttrs: roleArnAttrs(region, assumeRoleArn)},
+		{name: "assume role no trust", catalogAttrs: roleArnAttrs(region, noTrustRoleArn), wantErr: "AccessDenied"},
+		{name: "assume role missing ec2 permission", catalogAttrs: roleArnAttrs(region, missingPermRoleArn), wantErr: "UnauthorizedOperation"},
 	})
-	require.NoError(err)
-	reqSecrets, err := structpb.NewStruct(map[string]any{
-		credential.ConstAccessKeyId:     accessKeyId,
-		credential.ConstSecretAccessKey: secretAccessKey,
+	testOnUpdateCatalogCases(ctx, t, p, []onUpdateCatalogCase{
+		{name: "assume role happy path", catalogAttrs: roleArnAttrs(region, assumeRoleArn)},
+		{name: "assume role no trust", catalogAttrs: roleArnAttrs(region, noTrustRoleArn), wantErr: "AccessDenied"},
+		{name: "assume role missing ec2 permission", currentAttrs: roleArnAttrs(region, assumeRoleArn), newAttrs: roleArnAttrs(region, missingPermRoleArn), wantErr: "UnauthorizedOperation"},
 	})
-	require.NoError(err)
-	request := &pb.OnCreateCatalogRequest{
-		Catalog: &hostcatalogs.HostCatalog{
-			Attrs: &hostcatalogs.HostCatalog_Attributes{
-				Attributes: reqAttrs,
-			},
-			Secrets: reqSecrets,
-		},
-	}
-	response, err := p.OnCreateCatalog(ctx, request)
-	require.NoError(err)
-	require.NotNil(response)
-	persisted := response.GetPersisted()
-	require.NotNil(persisted)
-	return validatePersistedSecrets(t, persisted.GetSecrets(), accessKeyId, secretAccessKey, rotate)
-}
-
-func testPluginOnUpdateCatalog(
-	ctx context.Context, t *testing.T, p *host.HostPlugin,
-	region, currentAccessKeyId, currentSecretAccessKey, newAccessKeyId, newSecretAccessKey string,
-	rotated, rotate bool,
-) (string, string) {
-	t.Helper()
-	t.Logf("testing OnUpdateCatalog (region=%s, newcreds=%t, rotated=%t, rotate=%t)", region, newAccessKeyId != "" && newSecretAccessKey != "", rotated, rotate)
-	require := require.New(t)
-
-	// Take a timestamp of the current time to get a point in time to
-	// reference, ensuring that we are updating credential rotation
-	// timestamps.
-	currentCredsLastRotatedTime := time.Now()
-
-	reqCurrentAttrs, err := structpb.NewStruct(map[string]any{
-		credential.ConstRegion:                    region,
-		credential.ConstDisableCredentialRotation: !rotated,
+	testOnCreateSetCases(ctx, t, p, []onSetCase{
+		{name: "assume role happy path", catalogAttrs: roleArnAttrs(region, assumeRoleArn), tags: cases[0]},
+		{name: "assume role no trust", catalogAttrs: roleArnAttrs(region, noTrustRoleArn), wantErr: "AccessDenied"},
+		{name: "assume role missing ec2 permission", catalogAttrs: roleArnAttrs(region, missingPermRoleArn), wantErr: "UnauthorizedOperation"},
 	})
-	require.NoError(err)
-	reqNewAttrs, err := structpb.NewStruct(map[string]any{
-		credential.ConstRegion:                    region,
-		credential.ConstDisableCredentialRotation: !rotate,
+	testOnUpdateSetCases(ctx, t, p, []onSetCase{
+		{name: "assume role happy path", catalogAttrs: roleArnAttrs(region, assumeRoleArn), tags: cases[0]},
+		{name: "assume role no trust", catalogAttrs: roleArnAttrs(region, noTrustRoleArn), wantErr: "AccessDenied"},
+		{name: "assume role missing ec2 permission", catalogAttrs: roleArnAttrs(region, missingPermRoleArn), wantErr: "UnauthorizedOperation"},
 	})
-	require.NoError(err)
-	var reqSecrets *structpb.Struct
-	if newAccessKeyId != "" && newSecretAccessKey != "" {
-		reqSecrets, err = structpb.NewStruct(map[string]any{
-			credential.ConstAccessKeyId:     newAccessKeyId,
-			credential.ConstSecretAccessKey: newSecretAccessKey,
+	testListHostsCases(ctx, t, p, []listHostsCase{
+		{name: "assume role happy path", catalogAttrs: roleArnAttrs(region, assumeRoleArn), tags: cases[0], expected: expectedTagInstancesMap},
+		{name: "assume role no trust", catalogAttrs: roleArnAttrs(region, noTrustRoleArn), tags: cases[0], wantErr: "AccessDenied"},
+		{name: "assume role missing ec2 permission", catalogAttrs: roleArnAttrs(region, missingPermRoleArn), tags: cases[0], wantErr: "UnauthorizedOperation"},
 	})
-		require.NoError(err)
-	}
-	reqPersistedSecrets, err := structpb.NewStruct(map[string]any{
-		credential.ConstAccessKeyId:     currentAccessKeyId,
-		credential.ConstSecretAccessKey: currentSecretAccessKey,
-		credential.ConstCredsLastRotatedTime: func() string {
-			if rotated {
-				return currentCredsLastRotatedTime.Format(time.RFC3339Nano)
-			}
 
-			return (time.Time{}).Format(time.RFC3339Nano)
-		}(),
-	})
+	// ********************
+	// * Cross-Role AssumeRole - Happy Path & Error Cases
+	// ********************
+	// These tests exercise the two-hop role chain within a single AWS account.
+	// The principal role has no ec2:DescribeInstances; the target role
+	// (assume_role) does. The plugin must assume the principal first, then use
+	// those credentials to assume the target role before calling DescribeInstances.
+	// This validates the plugin's chained credential logic without requiring a
+	// second AWS account.
+	crossRolePrincipalArn, err := tf.GetOutputString("cross_role_principal_arn")
 	require.NoError(err)
-	require.NotNil(reqPersistedSecrets)
-	request := &pb.OnUpdateCatalogRequest{
-		CurrentCatalog: &hostcatalogs.HostCatalog{
-			Attrs: &hostcatalogs.HostCatalog_Attributes{
-				Attributes: reqCurrentAttrs,
-			},
-		},
-		NewCatalog: &hostcatalogs.HostCatalog{
-			Attrs: &hostcatalogs.HostCatalog_Attributes{
-				Attributes: reqNewAttrs,
-			},
-			Secrets: reqSecrets,
-		},
-		Persisted: &pb.HostCatalogPersisted{
-			Secrets: reqPersistedSecrets,
-		},
-	}
-	response, err := p.OnUpdateCatalog(ctx, request)
-	require.NoError(err)
-	require.NotNil(response)
-	persisted := response.GetPersisted()
-	require.NotNil(persisted)
-	return validateUpdateSecrets(t, persisted.GetSecrets(), currentCredsLastRotatedTime, currentAccessKeyId, currentSecretAccessKey, newAccessKeyId, newSecretAccessKey, rotated, rotate)
-}
 
-func testPluginOnDeleteCatalog(ctx context.Context, t *testing.T, p *host.HostPlugin, region, accessKeyId, secretAccessKey string, rotated bool) {
-	t.Helper()
-	t.Logf("testing OnDeleteCatalog (region=%s, rotated=%t)", region, rotated)
-	require := require.New(t)
+	crossRolePrincipalNoTrustArn, err := tf.GetOutputString("cross_role_principal_no_trust_arn")
+	require.NoError(err)
 
-	reqAttrs, err := structpb.NewStruct(map[string]any{
-		credential.ConstRegion:                    region,
-		credential.ConstDisableCredentialRotation: !rotated,
-	})
+	crossRoleTargetNoTrustArn, err := tf.GetOutputString("cross_role_target_no_trust_arn")
 	require.NoError(err)
-	reqSecrets, err := structpb.NewStruct(map[string]any{
-		credential.ConstAccessKeyId:     accessKeyId,
-		credential.ConstSecretAccessKey: secretAccessKey,
-	})
-	require.NoError(err)
-	reqPersistedSecrets, err := structpb.NewStruct(map[string]any{
-		credential.ConstAccessKeyId:     accessKeyId,
-		credential.ConstSecretAccessKey: secretAccessKey,
-		credential.ConstCredsLastRotatedTime: func() string {
-			if rotated {
-				return time.Now().Format(time.RFC3339Nano)
-			}
 
-			return (time.Time{}).Format(time.RFC3339Nano)
-		}(),
-	})
+	crossRoleTargetNoEc2PermissionArn, err := tf.GetOutputString("cross_role_target_no_ec2_permission_arn")
 	require.NoError(err)
-	request := &pb.OnDeleteCatalogRequest{
-		Catalog: &hostcatalogs.HostCatalog{
-			Attrs: &hostcatalogs.HostCatalog_Attributes{
-				Attributes: reqAttrs,
-			},
-			Secrets: reqSecrets,
-		},
-		Persisted: &pb.HostCatalogPersisted{
-			Secrets: reqPersistedSecrets,
-		},
-	}
-	response, err := p.OnDeleteCatalog(ctx, request)
-	require.NoError(err)
-	require.NotNil(response)
 
-	// We want to test the validity of the credentials post-deletion.
-	if rotated {
-		// The credentials should no longer be valid.
-		requireCredentialsInvalid(t, accessKeyId, secretAccessKey)
+	// assume_role_arn is reused as the cross-role target — it has ec2:DescribeInstances
+	// and its trust policy allows the cross-role principal to assume it.
+	testOnCreateCatalogCases(ctx, t, p, []onCreateCatalogCase{
+		{name: "cross-role happy path", catalogAttrs: crossRoleAttrs(region, crossRolePrincipalArn, assumeRoleArn)},
+		{name: "cross-role principal no trust", catalogAttrs: crossRoleAttrs(region, crossRolePrincipalNoTrustArn, assumeRoleArn), wantErr: "AccessDenied"},
+		{name: "cross-role target no trust", catalogAttrs: crossRoleAttrs(region, crossRolePrincipalArn, crossRoleTargetNoTrustArn), wantErr: "AccessDenied"},
+		{name: "cross-role target missing ec2 permission", catalogAttrs: crossRoleAttrs(region, crossRolePrincipalArn, crossRoleTargetNoEc2PermissionArn), wantErr: "UnauthorizedOperation"},
+	})
+	testOnUpdateCatalogCases(ctx, t, p, []onUpdateCatalogCase{
+		{name: "cross-role happy path", catalogAttrs: crossRoleAttrs(region, crossRolePrincipalArn, assumeRoleArn)},
+		{name: "cross-role principal no trust", catalogAttrs: crossRoleAttrs(region, crossRolePrincipalNoTrustArn, assumeRoleArn), wantErr: "AccessDenied"},
+		{name: "cross-role target no trust", catalogAttrs: crossRoleAttrs(region, crossRolePrincipalArn, crossRoleTargetNoTrustArn), wantErr: "AccessDenied"},
+		{name: "cross-role target missing ec2 permission", catalogAttrs: crossRoleAttrs(region, crossRolePrincipalArn, crossRoleTargetNoEc2PermissionArn), wantErr: "UnauthorizedOperation"},
+	})
+	testOnCreateSetCases(ctx, t, p, []onSetCase{
+		{name: "cross-role happy path", catalogAttrs: crossRoleAttrs(region, crossRolePrincipalArn, assumeRoleArn), tags: cases[0]},
+		{name: "cross-role principal no trust", catalogAttrs: crossRoleAttrs(region, crossRolePrincipalNoTrustArn, assumeRoleArn), wantErr: "AccessDenied"},
+		{name: "cross-role target no trust", catalogAttrs: crossRoleAttrs(region, crossRolePrincipalArn, crossRoleTargetNoTrustArn), wantErr: "AccessDenied"},
+		{name: "cross-role target missing ec2 permission", catalogAttrs: crossRoleAttrs(region, crossRolePrincipalArn, crossRoleTargetNoEc2PermissionArn), wantErr: "UnauthorizedOperation"},
+	})
+	testOnUpdateSetCases(ctx, t, p, []onSetCase{
+		{name: "cross-role happy path", catalogAttrs: crossRoleAttrs(region, crossRolePrincipalArn, assumeRoleArn), tags: cases[0]},
+		{name: "cross-role principal no trust", catalogAttrs: crossRoleAttrs(region, crossRolePrincipalNoTrustArn, assumeRoleArn), wantErr: "AccessDenied"},
+		{name: "cross-role target no trust", catalogAttrs: crossRoleAttrs(region, crossRolePrincipalArn, crossRoleTargetNoTrustArn), wantErr: "AccessDenied"},
+		{name: "cross-role target missing ec2 permission", catalogAttrs: crossRoleAttrs(region, crossRolePrincipalArn, crossRoleTargetNoEc2PermissionArn), wantErr: "UnauthorizedOperation"},
+	})
+	testListHostsCases(ctx, t, p, []listHostsCase{
+		{name: "cross-role happy path", catalogAttrs: crossRoleAttrs(region, crossRolePrincipalArn, assumeRoleArn), tags: cases[0], expected: expectedTagInstancesMap},
+		{name: "cross-role principal no trust", catalogAttrs: crossRoleAttrs(region, crossRolePrincipalNoTrustArn, assumeRoleArn), tags: cases[0], wantErr: "AccessDenied"},
+		{name: "cross-role target no trust", catalogAttrs: crossRoleAttrs(region, crossRolePrincipalArn, crossRoleTargetNoTrustArn), tags: cases[0], wantErr: "AccessDenied"},
+		{name: "cross-role target missing ec2 permission", catalogAttrs: crossRoleAttrs(region, crossRolePrincipalArn, crossRoleTargetNoEc2PermissionArn), tags: cases[0], wantErr: "UnauthorizedOperation"},
+	})
+	// ********************
+	// * Cross-Account AssumeRole - Happy Path & Error Cases
+	// ********************
+	// These tests require credentials for a second AWS account supplied via
+	// TARGET_AWS_ACCESS_KEY_ID, TARGET_AWS_SECRET_ACCESS_KEY, and (for
+	// temporary credentials) TARGET_AWS_SESSION_TOKEN. They are skipped
+	// (not failed) when the access key ID or secret access key are absent.
+	if targetAccessKeyId == "" || targetSecretAccessKey == "" {
+		t.Log("skipping cross-account tests: set TARGET_AWS_ACCESS_KEY_ID and TARGET_AWS_SECRET_ACCESS_KEY to enable")
 	} else {
-		// The credentials should still be valid. Sleep 10s first just to
-		// be sure, since we're not rotating.
-		time.Sleep(time.Second * 10)
-		requireCredentialsValid(t, accessKeyId, secretAccessKey)
+		crossAccountPrincipalArn, err := tf.GetOutputString("cross_account_principal_arn")
+		require.NoError(err)
+
+		crossAccountPrincipalNoTrustArn, err := tf.GetOutputString("cross_account_principal_no_trust_arn")
+		require.NoError(err)
+
+		crossAccountTargetArn, err := tf.GetOutputString("cross_account_target_arn")
+		require.NoError(err)
+
+		crossAccountTargetNoTrustArn, err := tf.GetOutputString("cross_account_target_no_trust_arn")
+		require.NoError(err)
+
+		crossAccountTargetNoEc2PermissionArn, err := tf.GetOutputString("cross_account_target_no_ec2_permission_arn")
+		require.NoError(err)
+
+		targetEc2InstanceIds, err := tf.GetOutputSlice("target_instance_ids")
+		require.NoError(err)
+		require.Len(targetEc2InstanceIds, expectedEc2InstanceCount)
+
+		targetEc2InstanceTags, err := tf.GetOutputMap("target_instance_tags")
+		require.NoError(err)
+		expectedTargetTagInstancesMap := buildExpectedTagInstancesMap(targetEc2InstanceTags, expectedTags)
+
+		requireTagInstancesMatchProvisioned(t, targetEc2InstanceIds, expectedTargetTagInstancesMap)
+
+		testOnCreateCatalogCases(ctx, t, p, []onCreateCatalogCase{
+			{name: "cross-account happy path", catalogAttrs: crossRoleAttrs(targetRegion, crossAccountPrincipalArn, crossAccountTargetArn)},
+			{name: "cross-account principal no trust", catalogAttrs: crossRoleAttrs(targetRegion, crossAccountPrincipalNoTrustArn, crossAccountTargetArn), wantErr: "AccessDenied"},
+			{name: "cross-account target no trust", catalogAttrs: crossRoleAttrs(targetRegion, crossAccountPrincipalArn, crossAccountTargetNoTrustArn), wantErr: "AccessDenied"},
+			{name: "cross-account target missing ec2 permission", catalogAttrs: crossRoleAttrs(targetRegion, crossAccountPrincipalArn, crossAccountTargetNoEc2PermissionArn), wantErr: "UnauthorizedOperation"},
+		})
+		testOnUpdateCatalogCases(ctx, t, p, []onUpdateCatalogCase{
+			{name: "cross-account happy path", catalogAttrs: crossRoleAttrs(targetRegion, crossAccountPrincipalArn, crossAccountTargetArn)},
+			{name: "cross-account principal no trust", catalogAttrs: crossRoleAttrs(targetRegion, crossAccountPrincipalNoTrustArn, crossAccountTargetArn), wantErr: "AccessDenied"},
+			{name: "cross-account target no trust", catalogAttrs: crossRoleAttrs(targetRegion, crossAccountPrincipalArn, crossAccountTargetNoTrustArn), wantErr: "AccessDenied"},
+			{name: "cross-account target missing ec2 permission", catalogAttrs: crossRoleAttrs(targetRegion, crossAccountPrincipalArn, crossAccountTargetNoEc2PermissionArn), wantErr: "UnauthorizedOperation"},
+		})
+		testOnCreateSetCases(ctx, t, p, []onSetCase{
+			{name: "cross-account happy path", catalogAttrs: crossRoleAttrs(targetRegion, crossAccountPrincipalArn, crossAccountTargetArn), tags: cases[0]},
+			{name: "cross-account principal no trust", catalogAttrs: crossRoleAttrs(targetRegion, crossAccountPrincipalNoTrustArn, crossAccountTargetArn), wantErr: "AccessDenied"},
+			{name: "cross-account target no trust", catalogAttrs: crossRoleAttrs(targetRegion, crossAccountPrincipalArn, crossAccountTargetNoTrustArn), wantErr: "AccessDenied"},
+			{name: "cross-account target missing ec2 permission", catalogAttrs: crossRoleAttrs(targetRegion, crossAccountPrincipalArn, crossAccountTargetNoEc2PermissionArn), wantErr: "UnauthorizedOperation"},
+		})
+		testOnUpdateSetCases(ctx, t, p, []onSetCase{
+			{name: "cross-account happy path", catalogAttrs: crossRoleAttrs(targetRegion, crossAccountPrincipalArn, crossAccountTargetArn), tags: cases[0]},
+			{name: "cross-account principal no trust", catalogAttrs: crossRoleAttrs(targetRegion, crossAccountPrincipalNoTrustArn, crossAccountTargetArn), wantErr: "AccessDenied"},
+			{name: "cross-account target no trust", catalogAttrs: crossRoleAttrs(targetRegion, crossAccountPrincipalArn, crossAccountTargetNoTrustArn), wantErr: "AccessDenied"},
+			{name: "cross-account target missing ec2 permission", catalogAttrs: crossRoleAttrs(targetRegion, crossAccountPrincipalArn, crossAccountTargetNoEc2PermissionArn), wantErr: "UnauthorizedOperation"},
+		})
+		testListHostsCases(ctx, t, p, []listHostsCase{
+			{name: "cross-account happy path", catalogAttrs: crossRoleAttrs(targetRegion, crossAccountPrincipalArn, crossAccountTargetArn), tags: cases[0], expected: expectedTargetTagInstancesMap},
+			{name: "cross-account principal no trust", catalogAttrs: crossRoleAttrs(targetRegion, crossAccountPrincipalNoTrustArn, crossAccountTargetArn), tags: cases[0], wantErr: "AccessDenied"},
+			{name: "cross-account target no trust", catalogAttrs: crossRoleAttrs(targetRegion, crossAccountPrincipalArn, crossAccountTargetNoTrustArn), tags: cases[0], wantErr: "AccessDenied"},
+			{name: "cross-account target missing ec2 permission", catalogAttrs: crossRoleAttrs(targetRegion, crossAccountPrincipalArn, crossAccountTargetNoEc2PermissionArn), tags: cases[0], wantErr: "UnauthorizedOperation"},
+		})
 	}
 }
-
-func testPluginOnCreateUpdateSet(ctx context.Context, t *testing.T, p *host.HostPlugin, region, accessKeyId, secretAccessKey string, tags []string) {
-	t.Helper()
-	t.Logf("testing OnCreateSet (region=%s, tags=%v)", region, tags)
-	require := require.New(t)
-	catalogAttrs, err := structpb.NewStruct(map[string]any{
-		credential.ConstRegion:                    region,
-		credential.ConstDisableCredentialRotation: true, // Note that this does nothing in sets, but just noting for tests
-	})
-	require.NoError(err)
-	setAttrs, err := structpb.NewStruct(map[string]any{
-		host.ConstDescribeInstancesFilters: []any{fmt.Sprintf("tag-key=%s", strings.Join(tags, ","))},
-	})
-	require.NoError(err)
-	reqPersistedSecrets, err := structpb.NewStruct(map[string]any{
-		credential.ConstAccessKeyId:          accessKeyId,
-		credential.ConstSecretAccessKey:      secretAccessKey,
-		credential.ConstCredsLastRotatedTime: (time.Time{}).Format(time.RFC3339Nano),
-	})
-	require.NoError(err)
-	createRequest := &pb.OnCreateSetRequest{
-		Catalog: &hostcatalogs.HostCatalog{
-			Attrs: &hostcatalogs.HostCatalog_Attributes{
-				Attributes: catalogAttrs,
-			},
-		},
-		Set: &hostsets.HostSet{
-			Attrs: &hostsets.HostSet_Attributes{
-				Attributes: setAttrs,
-			},
-		},
-		Persisted: &pb.HostCatalogPersisted{
-			Secrets: reqPersistedSecrets,
-		},
-	}
-	createResponse, err := p.OnCreateSet(ctx, createRequest)
-	require.NoError(err)
-	require.NotNil(createResponse)
-
-	// Do an update test in the same function, as it's pretty much the
-	// same function right now.
-	t.Logf("testing OnUpdateSet (region=%s, tags=%v)", region, tags)
-	updateRequest := &pb.OnUpdateSetRequest{
-		Catalog: &hostcatalogs.HostCatalog{
-			Attrs: &hostcatalogs.HostCatalog_Attributes{
-				Attributes: catalogAttrs,
-			},
-		},
-		CurrentSet: &hostsets.HostSet{
-			Attrs: &hostsets.HostSet_Attributes{
-				Attributes: setAttrs,
-			},
-		},
-		NewSet: &hostsets.HostSet{
-			Attrs: &hostsets.HostSet_Attributes{
-				Attributes: setAttrs,
-			},
-		},
-		Persisted: &pb.HostCatalogPersisted{
-			Secrets: reqPersistedSecrets,
-		},
-	}
-	updateResponse, err := p.OnUpdateSet(ctx, updateRequest)
-	require.NoError(err)
-	require.NotNil(updateResponse)
-}
-
-func testPluginListHosts(ctx context.Context, t *testing.T, p *host.HostPlugin, region, accessKeyId, secretAccessKey string, tags []string, expected map[string][]string) {
-	t.Helper()
-	t.Logf("testing ListHosts (region=%s, tags=%v)", region, tags)
-	require := require.New(t)
-	catalogAttrs, err := structpb.NewStruct(map[string]any{
-		credential.ConstRegion:                    region,
-		credential.ConstDisableCredentialRotation: true, // Note that this does nothing in sets, but just noting for tests
-	})
-	require.NoError(err)
-	sets := make([]*hostsets.HostSet, len(tags))
-	for i, tag := range tags {
-		setAttrs, err := structpb.NewStruct(map[string]any{
-			host.ConstDescribeInstancesFilters: []any{fmt.Sprintf("tag-key=%s", tag)},
-		})
-		require.NoError(err)
-		sets[i] = &hostsets.HostSet{
-			Id: fmt.Sprintf("hostset-%d", i),
-			Attrs: &hostsets.HostSet_Attributes{
-				Attributes: setAttrs,
-			},
-		}
-	}
-	reqPersistedSecrets, err := structpb.NewStruct(map[string]any{
-		credential.ConstAccessKeyId:          accessKeyId,
-		credential.ConstSecretAccessKey:      secretAccessKey,
-		credential.ConstCredsLastRotatedTime: (time.Time{}).Format(time.RFC3339Nano),
-	})
-	require.NoError(err)
-	request := &pb.ListHostsRequest{
-		Catalog: &hostcatalogs.HostCatalog{
-			Attrs: &hostcatalogs.HostCatalog_Attributes{
-				Attributes: catalogAttrs,
-			},
-		},
-		Sets: sets,
-		Persisted: &pb.HostCatalogPersisted{
-			Secrets: reqPersistedSecrets,
-		},
-	}
-	response, err := p.ListHosts(ctx, request)
-	require.NoError(err)
-	require.NotNil(response)
-
-	// Validate the returned instances by ID. Assemble the instance
-	// details from the expected set.
-	expectedInstances := make(map[string][]string)
-	for i, tag := range tags {
-		for _, instanceId := range expected[tag] {
-			expectedInstances[instanceId] = append(expectedInstances[instanceId], fmt.Sprintf("hostset-%d", i))
-		}
-	}
-
-	// Take the returned hosts by ID and create the same kind of map.
-	actualInstances := make(map[string][]string)
-	for _, host := range response.GetHosts() {
-		actualInstances[host.ExternalId] = host.SetIds
-	}
-
-	// Compare
-	require.Equal(expectedInstances, actualInstances)
-	// Success
-	t.Logf("testing ListHosts: success (region=%s, tags=%v, expected/actual=(len=%d, ids=%s))", region, tags, len(actualInstances), actualInstances)
-}

testing/e2e_storage_test.go

@@ -1,10 +1,11 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2021, 2026
 // SPDX-License-Identifier: MPL-2.0
 
 package testing
 
 import (
 	"context"
+	"fmt"
 	"io"
 	"net"
 	"os"
@@ -13,10 +14,10 @@ import (
 	"time"
 
 	"github.com/google/uuid"
-	"github.com/hashicorp/boundary-plugin-aws/internal/credential"
-	"github.com/hashicorp/boundary-plugin-aws/plugin/service/storage"
-	"github.com/hashicorp/boundary/sdk/pbs/controller/api/resources/storagebuckets"
-	pb "github.com/hashicorp/boundary/sdk/pbs/plugin"
+	"repo.anhonesthost.net/CyberCoveLLC/threshold-plugin-aws/internal/credential"
+	"repo.anhonesthost.net/CyberCoveLLC/threshold-plugin-aws/plugin/service/storage"
+	"repo.anhonesthost.net/CyberCoveLLC/threshold/sdk/pbs/controller/api/resources/storagebuckets"
+	pb "repo.anhonesthost.net/CyberCoveLLC/threshold/sdk/pbs/plugin"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
 	"google.golang.org/grpc"
@@ -85,6 +86,12 @@ func TestStoragePlugin(t *testing.T) {
 	iamSecretAccessKeyMissingDeleteObject, err := tf.GetOutputString("iam_secret_access_key_missing_delete_obj")
 	require.NoError(err)
 
+	s3PaginationTestObjectCount, err := tf.GetOutput("s3_pagination_test_object_count")
+	require.NoError(err)
+	objectCountFloat, ok := s3PaginationTestObjectCount.(float64)
+	require.True(ok)
+	objectCount := int(objectCountFloat)
+
 	// Start the workflow now. Set up the storage bucket. Note that this
 	// will cause the state to go out of drift above in the sense that
 	// the access key ID/secret access key will no longer be valid. We
@@ -138,6 +145,11 @@ func TestStoragePlugin(t *testing.T) {
 	keyid, secret = iamAccessKeyIds[5].(string), iamSecretAccessKeys[5].(string)
 	testPluginObjectMethods(ctx, t, p, bucketName, region, keyid, secret)
 
+	// ********************
+	// * ListObjects
+	// ********************
+	testListObjects(ctx, t, p, objectCount, bucketName, region, keyid, secret)
+
 	// ********************
 	// * Validate Permissions
 	// ********************
@@ -514,3 +526,198 @@ func testPluginObjectMethods(ctx context.Context, t *testing.T, p *storage.Stora
 	require.NoError(conn.Close())
 	grpcServer.Stop()
 }
+
+// testListObjects verifies top-level and recursive listing by matching the exact keys and types of returned objects.
+func testListObjects(ctx context.Context, t *testing.T, p *storage.StoragePlugin, objectCount int, bucketName, region, accessKeyId, secretAccessKey string) {
+	t.Helper()
+	t.Logf("testing ListObjects (bucket=%s, region=%s, expectedObjects=%d, creds=%t)",
+		bucketName,
+		region,
+		objectCount,
+		accessKeyId != "" && secretAccessKey != "",
+	)
+	r := require.New(t)
+
+	reqAttrs, err := structpb.NewStruct(map[string]any{
+		credential.ConstRegion:                    region,
+		credential.ConstDisableCredentialRotation: true,
+	})
+	r.NoError(err)
+	reqSecrets, err := structpb.NewStruct(map[string]any{
+		credential.ConstAccessKeyId:     accessKeyId,
+		credential.ConstSecretAccessKey: secretAccessKey,
+	})
+	r.NoError(err)
+
+	bucket := &storagebuckets.StorageBucket{
+		BucketName: bucketName,
+		Attributes: reqAttrs,
+		Secrets:    reqSecrets,
+	}
+
+	// Test Scenario 1: Non-Paginated Listing
+	t.Run("NonPaginatedListing", func(t *testing.T) {
+
+		// Subtest for the non-recursive (top-level) option
+		t.Run("TopLevel", func(t *testing.T) {
+			r := require.New(t)
+			t.Logf("testing ListObjects for a small set with recursive=false")
+			req := &pb.ListObjectsRequest{
+				Bucket:    bucket,
+				KeyPrefix: "list-objects/",
+				Recursive: false,
+			}
+			resp, err := p.ListObjects(ctx, req)
+			r.NoError(err)
+			r.NotNil(resp)
+
+			expectedObjects := []*pb.Object{
+				{Key: "list-objects/file1.txt", IsDir: false},
+				{Key: "list-objects/data.json", IsDir: false},
+				{Key: "list-objects/nested-dir/", IsDir: true},
+				{Key: "list-objects/empty-nested-dir/", IsDir: true},
+			}
+			r.ElementsMatch(resp.Objects, expectedObjects)
+		})
+
+		// Subtest for the recursive option
+		t.Run("Recursive", func(t *testing.T) {
+			r := require.New(t)
+			t.Logf("testing ListObjects for a small set with recursive=true")
+			req := &pb.ListObjectsRequest{
+				Bucket:    bucket,
+				KeyPrefix: "list-objects/",
+				Recursive: true,
+			}
+			resp, err := p.ListObjects(ctx, req)
+			r.NoError(err)
+			r.NotNil(resp)
+
+			expectedObjects := []*pb.Object{
+				{Key: "list-objects/file1.txt", IsDir: false},
+				{Key: "list-objects/data.json", IsDir: false},
+				{Key: "list-objects/nested-dir/file2.txt", IsDir: false},
+				{Key: "list-objects/nested-dir/", IsDir: true},
+				{Key: "list-objects/empty-nested-dir/", IsDir: true},
+			}
+
+			r.ElementsMatch(resp.Objects, expectedObjects)
+		})
+	})
+
+	// Test Scenario 2: Paginated Top-Level Listing
+	t.Run("TopLevelListing", func(t *testing.T) {
+		// Subtest for the root prefix
+		t.Run("AtRoot", func(t *testing.T) {
+			r := require.New(t)
+			t.Logf("testing ListObjects with recursive=false at root prefix")
+			req := &pb.ListObjectsRequest{
+				Bucket:    bucket,
+				KeyPrefix: "list-objects-paginated/",
+				Recursive: false,
+			}
+			resp, err := p.ListObjects(ctx, req)
+			r.NoError(err)
+			r.NotNil(resp)
+
+			var expectedObjects []*pb.Object
+			for i := 0; i < objectCount; i++ {
+				key := fmt.Sprintf("list-objects-paginated/root-file-%d.txt", i)
+				expectedObjects = append(expectedObjects, &pb.Object{Key: key, IsDir: false})
+			}
+			for i := 0; i < objectCount; i++ {
+				keyEmpty := fmt.Sprintf("list-objects-paginated/empty-dir-%d/", i)
+				expectedObjects = append(expectedObjects, &pb.Object{Key: keyEmpty, IsDir: true})
+				keyNested := fmt.Sprintf("list-objects-paginated/nested-dir-%d/", i)
+				expectedObjects = append(expectedObjects, &pb.Object{Key: keyNested, IsDir: true})
+			}
+
+			r.ElementsMatch(resp.Objects, expectedObjects)
+		})
+
+		// Subtest for a nested prefix
+		t.Run("AtNestedPrefix", func(t *testing.T) {
+			r := require.New(t)
+			t.Logf("testing ListObjects with recursive=false at a nested prefix")
+			req := &pb.ListObjectsRequest{
+				Bucket:    bucket,
+				KeyPrefix: "list-objects-paginated/nested-dir-7/",
+				Recursive: false,
+			}
+			resp, err := p.ListObjects(ctx, req)
+			r.NoError(err)
+			r.NotNil(resp)
+
+			expectedObjects := []*pb.Object{
+				{Key: "list-objects-paginated/nested-dir-7/data-file-7.json", IsDir: false},
+			}
+
+			r.ElementsMatch(resp.Objects, expectedObjects)
+		})
+	})
+
+	// Test Scenario 3: Paginated Recursive Listing
+	t.Run("RecursiveListing", func(t *testing.T) {
+		r := require.New(t)
+		t.Logf("testing ListObjects with recursive=true")
+		req := &pb.ListObjectsRequest{
+			Bucket:    bucket,
+			KeyPrefix: "list-objects-paginated/",
+			Recursive: true,
+		}
+		resp, err := p.ListObjects(ctx, req)
+		r.NoError(err)
+		r.NotNil(resp)
+
+		var expectedObjects []*pb.Object
+		for i := 0; i < objectCount; i++ {
+			keyFile := fmt.Sprintf("list-objects-paginated/root-file-%d.txt", i)
+			expectedObjects = append(expectedObjects, &pb.Object{Key: keyFile, IsDir: false})
+			keyNestedFile := fmt.Sprintf("list-objects-paginated/nested-dir-%d/data-file-%d.json", i, i)
+			expectedObjects = append(expectedObjects, &pb.Object{Key: keyNestedFile, IsDir: false})
+		}
+		for i := 0; i < objectCount; i++ {
+			keyNestedDir := fmt.Sprintf("list-objects-paginated/nested-dir-%d/", i)
+			expectedObjects = append(expectedObjects, &pb.Object{Key: keyNestedDir, IsDir: true})
+			keyEmptyDir := fmt.Sprintf("list-objects-paginated/empty-dir-%d/", i)
+			expectedObjects = append(expectedObjects, &pb.Object{Key: keyEmptyDir, IsDir: true})
+			keyNestedEmptyDir := fmt.Sprintf("list-objects-paginated/empty-dir-%d/dir-%d/", i, i)
+			expectedObjects = append(expectedObjects, &pb.Object{Key: keyNestedEmptyDir, IsDir: true})
+		}
+
+		r.ElementsMatch(resp.Objects, expectedObjects)
+	})
+
+	// Test Scenario 4: Edge cases
+	t.Run("EdgeCases", func(t *testing.T) {
+		// Subtest for a prefix that doesn't exist
+		t.Run("NonExistentPrefix", func(t *testing.T) {
+			r := require.New(t)
+			t.Logf("testing ListObjects for a non-existent prefix")
+			req := &pb.ListObjectsRequest{
+				Bucket:    bucket,
+				KeyPrefix: "this/prefix/does/not/exist/",
+				Recursive: false,
+			}
+			resp, err := p.ListObjects(ctx, req)
+			r.NoError(err)
+			r.NotNil(resp)
+			r.Empty(resp.Objects)
+		})
+
+		// Subtest for listing inside a known empty directory
+		t.Run("InsideEmptyDirectory", func(t *testing.T) {
+			r := require.New(t)
+			t.Logf("testing ListObjects inside an empty directory")
+			req := &pb.ListObjectsRequest{
+				Bucket:    bucket,
+				KeyPrefix: "list-objects-paginated/empty-dirs/dir-10/",
+				Recursive: false,
+			}
+			resp, err := p.ListObjects(ctx, req)
+			r.NoError(err)
+			r.NotNil(resp)
+			r.Empty(resp.Objects)
+		})
+	})
+}

testing/testdata/host/iam.tf

@@ -1,17 +1,9 @@
-# Copyright (c) HashiCorp, Inc.
+# Copyright IBM Corp. 2021, 2026
 # SPDX-License-Identifier: MPL-2.0
 
-variable "iam_user_prefix" {
-  default = "boundary-plugin-host-aws-test-iam-user"
-}
-
-variable "iam_user_count" {
-  default = 6
-}
-
 resource "random_id" "aws_iam_user_name" {
   count       = var.iam_user_count
-  prefix      = "${var.iam_user_prefix}-${count.index}"
+  prefix      = "demo-${local.hashicorp_email}-boundary-iam-user"
   byte_length = 4
 }
 
@@ -19,6 +11,10 @@ resource "aws_iam_user" "user" {
   count                = var.iam_user_count
   name                 = random_id.aws_iam_user_name[count.index].dec
   force_destroy        = true
+  permissions_boundary = "arn:aws:iam::${data.aws_caller_identity.current.account_id}:policy/DemoUser"
+  tags = {
+    "boundary-demo" = local.hashicorp_email
+  }
 }
 
 resource "aws_iam_access_key" "user_initial_key" {
@@ -26,8 +22,13 @@ resource "aws_iam_access_key" "user_initial_key" {
   user  = aws_iam_user.user[count.index].name
 }
 
+resource "random_id" "aws_ec2_policy_name" {
+  prefix      = "BoundaryPluginHost"
+  byte_length = 4
+}
+
 resource "aws_iam_policy" "ec2_describeinstances" {
-  name = "BoundaryPluginHostAwsTestDescribeInstancesPolicy"
+  name = random_id.aws_ec2_policy_name.dec
 
   policy = <<EOF
 {
@@ -51,9 +52,15 @@ resource "aws_iam_user_policy_attachment" "user_ec2_describeinstances_attachment
   policy_arn = aws_iam_policy.ec2_describeinstances.arn
 }
 
+resource "random_id" "aws_iam_policy_name" {
+  count       = var.iam_user_count
+  prefix      = "BoundaryPluginCredentials"
+  byte_length = 4
+}
+
 resource "aws_iam_policy" "user_self_manage_policy" {
   count = var.iam_user_count
-  name  = "BoundaryPluginHostAwsTestUserSelfManagePolicy-${count.index}"
+  name  = random_id.aws_iam_policy_name[count.index].dec
 
   policy = <<EOF
 {

testing/testdata/host/iam_assume_role.tf

@@ -0,0 +1,206 @@
+# Copyright IBM Corp. 2021, 2026
+# SPDX-License-Identifier: MPL-2.0
+
+resource "random_id" "assume_role_name" {
+  prefix      = "BoundaryPluginAssumeRole"
+  byte_length = 4
+}
+
+resource "aws_iam_role" "assume_role" {
+  name = random_id.assume_role_name.dec
+
+  assume_role_policy = jsonencode({
+    Version = "2012-10-17"
+    Statement = [
+      {
+        Action = ["sts:AssumeRole", "sts:SetSourceIdentity"]
+        Effect = "Allow"
+        Principal = {
+          AWS = data.aws_caller_identity.current.arn
+        }
+      },
+      # Also trusted by the cross-role principal role so it can be used
+      # as the target in two-hop AssumeRole tests.
+      {
+        Action = ["sts:AssumeRole", "sts:SetSourceIdentity"]
+        Effect = "Allow"
+        Principal = {
+          AWS = aws_iam_role.cross_role_principal.arn
+        }
+      },
+    ]
+  })
+
+  tags = {
+    "boundary-demo" = local.hashicorp_email
+  }
+}
+
+resource "aws_iam_role_policy_attachment" "assume_role_ec2_describeinstances" {
+  role       = aws_iam_role.assume_role.name
+  policy_arn = aws_iam_policy.ec2_describeinstances.arn
+}
+
+output "assume_role_arn" {
+  value = aws_iam_role.assume_role.arn
+}
+
+# Error case: role exists with ec2:DescribeInstances but trust policy
+# does not allow the caller to assume it.
+resource "random_id" "assume_role_no_trust_name" {
+  prefix      = "BoundaryPluginNoTrust"
+  byte_length = 4
+}
+
+resource "aws_iam_role" "assume_role_no_trust" {
+  name = random_id.assume_role_no_trust_name.dec
+
+  assume_role_policy = jsonencode({
+    Version = "2012-10-17"
+    Statement = [
+      {
+        Action = ["sts:AssumeRole", "sts:SetSourceIdentity"]
+        Effect = "Deny"
+        Principal = {
+          AWS = data.aws_caller_identity.current.arn
+        }
+      },
+    ]
+  })
+
+  tags = {
+    "boundary-demo" = local.hashicorp_email
+  }
+}
+
+output "assume_role_no_trust_arn" {
+  value = aws_iam_role.assume_role_no_trust.arn
+}
+
+# Error case: role exists and the caller can assume it, but has no
+# ec2:DescribeInstances permission.
+# Also trusted by cross_role_principal so this same role can be reused as the
+# no-EC2-permission target in two-hop (cross-role) error case tests.
+resource "random_id" "assume_role_no_ec2_permission_name" {
+  prefix      = "BoundaryPluginNoEC2Perm"
+  byte_length = 4
+}
+
+resource "aws_iam_role" "assume_role_no_ec2_permission" {
+  name = random_id.assume_role_no_ec2_permission_name.dec
+
+  assume_role_policy = jsonencode({
+    Version = "2012-10-17"
+    Statement = [
+      {
+        Action = ["sts:AssumeRole", "sts:SetSourceIdentity"]
+        Effect = "Allow"
+        Principal = {
+          AWS = data.aws_caller_identity.current.arn
+        }
+      },
+      # Also trusted by the cross-role principal so it can serve as the
+      # no-EC2-permission target in two-hop error case tests.
+      {
+        Action = ["sts:AssumeRole", "sts:SetSourceIdentity"]
+        Effect = "Allow"
+        Principal = {
+          AWS = aws_iam_role.cross_role_principal.arn
+        }
+      },
+    ]
+  })
+
+  tags = {
+    "boundary-demo" = local.hashicorp_email
+  }
+}
+
+output "assume_role_no_ec2_permission_arn" {
+  value = aws_iam_role.assume_role_no_ec2_permission.arn
+}
+
+# Cross-role (two-hop) principal role.
+# The test runner can assume this role. It has permission to AssumeRole into
+# aws_iam_role.assume_role (the target role) but has no ec2:DescribeInstances
+# of its own. This simulates the principal side of a two-hop role chain: the
+# plugin must assume the principal first, then use those credentials to assume
+# the target role before calling DescribeInstances.
+# Note: both roles are in the same AWS account. This tests the plugin's
+# two-hop credential chain logic without requiring a second account.
+resource "random_id" "cross_role_principal_name" {
+  prefix      = "BoundaryPluginCRPrincipal"
+  byte_length = 4
+}
+
+resource "aws_iam_role" "cross_role_principal" {
+  name = random_id.cross_role_principal_name.dec
+
+  assume_role_policy = jsonencode({
+    Version = "2012-10-17"
+    Statement = [
+      {
+        Action = ["sts:AssumeRole", "sts:SetSourceIdentity"]
+        Effect = "Allow"
+        Principal = {
+          AWS = data.aws_caller_identity.current.arn
+        }
+      },
+    ]
+  })
+
+  tags = {
+    "boundary-demo" = local.hashicorp_email
+  }
+}
+
+# Single policy granting cross_role_principal permission to assume all target
+# roles it needs for both happy path and error case tests.
+resource "aws_iam_policy" "cross_role_principal_assume_targets" {
+  name = "${random_id.cross_role_principal_name.dec}-assume-targets"
+
+  policy = jsonencode({
+    Version = "2012-10-17"
+    Statement = [
+      {
+        Action = ["sts:AssumeRole", "sts:SetSourceIdentity"]
+        Effect = "Allow"
+        Resource = [
+          aws_iam_role.assume_role.arn,
+          aws_iam_role.assume_role_no_ec2_permission.arn,
+        ]
+      },
+    ]
+  })
+}
+
+resource "aws_iam_role_policy_attachment" "cross_role_principal_assume_targets" {
+  role       = aws_iam_role.cross_role_principal.name
+  policy_arn = aws_iam_policy.cross_role_principal_assume_targets.arn
+}
+
+output "cross_role_principal_arn" {
+  value = aws_iam_role.cross_role_principal.arn
+}
+
+# Error case: caller cannot assume the principal role (first hop denied).
+# Reuses assume_role_no_trust — it already has a Deny trust policy for the
+# caller, so it also serves as an unassumable principal in two-hop tests.
+output "cross_role_principal_no_trust_arn" {
+  value = aws_iam_role.assume_role_no_trust.arn
+}
+
+# Error case: principal can be assumed, but the target role's trust policy
+# does not allow the principal to assume it (second hop denied).
+# Reuses assume_role_no_trust as the target — its Deny trust policy blocks
+# all callers including cross_role_principal.
+output "cross_role_target_no_trust_arn" {
+  value = aws_iam_role.assume_role_no_trust.arn
+}
+
+# Error case: both hops succeed but the target has no ec2:DescribeInstances.
+# Reuses assume_role_no_ec2_permission — its trust policy allows
+# cross_role_principal (see above), and it has no EC2 permission.
+output "cross_role_target_no_ec2_permission_arn" {
+  value = aws_iam_role.assume_role_no_ec2_permission.arn
+}

testing/testdata/host/iam_cross_account.tf

@@ -0,0 +1,322 @@
+# Copyright IBM Corp. 2021, 2026
+# SPDX-License-Identifier: MPL-2.0
+
+# Cross-account Dynamic Host Catalog test infrastructure.
+#
+# This file provisions the IAM resources needed to test two-hop AssumeRole
+# across two separate AWS accounts:
+#
+#   Account A (principal account) — the default provider
+#     * cross_account_principal: the plugin assumes this role first.
+#       It has sts:AssumeRole permission on the target role in Account B.
+#
+#   Account B (target account) — the "target" provider alias
+#     * cross_account_target: holds ec2:DescribeInstances; its trust policy
+#       allows the Account A principal role to assume it. (happy path)
+#     * cross_account_target_no_ec2_permission: same trust policy but no
+#       ec2:DescribeInstances. (error case)
+#     * cross_account_target_no_trust: exists in Account B but its trust
+#       policy does not allow the Account A principal. (error case)
+#
+# Prerequisites:
+#   TARGET_AWS_ACCESS_KEY_ID, TARGET_AWS_SECRET_ACCESS_KEY, and (for temporary
+#   credentials) TARGET_AWS_SESSION_TOKEN must be set to credentials that have
+#   sufficient IAM permissions in Account B. The test runner skips this
+#   section when the access key ID or secret access key are absent.
+
+# ---------------------------------------------------------------------------
+# Provider for Account B (target account)
+# ---------------------------------------------------------------------------
+
+provider "aws" {
+  alias      = "target"
+  region     = var.target_region
+  access_key = var.target_access_key_id
+  secret_key = var.target_secret_access_key
+  token      = var.target_session_token
+}
+
+data "aws_caller_identity" "target" {
+  provider = aws.target
+}
+
+# ---------------------------------------------------------------------------
+# Variables for Account B credentials and region
+# ---------------------------------------------------------------------------
+
+variable "target_access_key_id" {
+  description = "AWS access key ID for the target account (Account B)."
+  type        = string
+  sensitive   = true
+  default     = ""
+}
+
+variable "target_secret_access_key" {
+  description = "AWS secret access key for the target account (Account B)."
+  type        = string
+  sensitive   = true
+  default     = ""
+}
+
+variable "target_session_token" {
+  description = "AWS session token for the target account (Account B). Required when using temporary (STS) credentials."
+  type        = string
+  sensitive   = true
+  default     = ""
+}
+
+variable "target_region" {
+  description = "AWS region for the target account (Account B). Defaults to the same region as Account A."
+  type        = string
+  default     = ""
+}
+
+# ---------------------------------------------------------------------------
+# Account A: cross_account_principal role
+# ---------------------------------------------------------------------------
+
+resource "random_id" "cross_account_principal_name" {
+  prefix      = "BoundaryPluginCAPrincipal"
+  byte_length = 4
+}
+
+resource "aws_iam_role" "cross_account_principal" {
+  name = random_id.cross_account_principal_name.dec
+
+  assume_role_policy = jsonencode({
+    Version = "2012-10-17"
+    Statement = [
+      {
+        Action    = ["sts:AssumeRole", "sts:SetSourceIdentity"]
+        Effect    = "Allow"
+        Principal = { AWS = data.aws_caller_identity.current.arn }
+      },
+    ]
+  })
+
+  tags = {
+    "boundary-demo" = local.hashicorp_email
+  }
+}
+
+# Allow the principal role to assume the happy-path and no-EC2-permission
+# target roles in Account B.
+resource "aws_iam_policy" "cross_account_principal_assume_targets" {
+  name = "${random_id.cross_account_principal_name.dec}-assume-targets"
+
+  policy = jsonencode({
+    Version = "2012-10-17"
+    Statement = [
+      {
+        Action   = ["sts:AssumeRole", "sts:SetSourceIdentity"]
+        Effect   = "Allow"
+        Resource = [
+          aws_iam_role.cross_account_target.arn,
+          aws_iam_role.cross_account_target_no_ec2_permission.arn,
+        ]
+      },
+    ]
+  })
+}
+
+resource "aws_iam_role_policy_attachment" "cross_account_principal_assume_targets" {
+  role       = aws_iam_role.cross_account_principal.name
+  policy_arn = aws_iam_policy.cross_account_principal_assume_targets.arn
+}
+
+output "cross_account_principal_arn" {
+  value = aws_iam_role.cross_account_principal.arn
+}
+
+# Error case: caller cannot assume the principal role (first hop denied).
+# Reuses assume_role_no_trust from iam_assume_role.tf — its Deny trust policy
+# also blocks the test runner from assuming it as a principal.
+output "cross_account_principal_no_trust_arn" {
+  value = aws_iam_role.assume_role_no_trust.arn
+}
+
+# ---------------------------------------------------------------------------
+# Account B: happy-path target role
+# ---------------------------------------------------------------------------
+
+resource "random_id" "cross_account_target_name" {
+  prefix      = "BoundaryPluginCATarget"
+  byte_length = 4
+}
+
+resource "aws_iam_role" "cross_account_target" {
+  provider = aws.target
+  name     = random_id.cross_account_target_name.dec
+
+  assume_role_policy = jsonencode({
+    Version = "2012-10-17"
+    Statement = [
+      {
+        Action    = ["sts:AssumeRole", "sts:SetSourceIdentity"]
+        Effect    = "Allow"
+        Principal = { AWS = aws_iam_role.cross_account_principal.arn }
+      },
+    ]
+  })
+
+  tags = {
+    "boundary-demo" = local.hashicorp_email
+  }
+}
+
+resource "aws_iam_policy" "cross_account_target_ec2_describeinstances" {
+  provider = aws.target
+  name     = "${random_id.cross_account_target_name.dec}-ec2"
+
+  policy = jsonencode({
+    Version = "2012-10-17"
+    Statement = [
+      {
+        Action   = ["ec2:DescribeInstances"]
+        Effect   = "Allow"
+        Resource = "*"
+      },
+    ]
+  })
+}
+
+resource "aws_iam_role_policy_attachment" "cross_account_target_ec2_describeinstances" {
+  provider   = aws.target
+  role       = aws_iam_role.cross_account_target.name
+  policy_arn = aws_iam_policy.cross_account_target_ec2_describeinstances.arn
+}
+
+output "cross_account_target_arn" {
+  value = aws_iam_role.cross_account_target.arn
+}
+
+# ---------------------------------------------------------------------------
+# Account B: error case — both hops succeed but target has no ec2:DescribeInstances
+# ---------------------------------------------------------------------------
+
+resource "random_id" "cross_account_target_no_ec2_permission_name" {
+  prefix      = "BoundaryPluginCATargetNoEC2"
+  byte_length = 4
+}
+
+resource "aws_iam_role" "cross_account_target_no_ec2_permission" {
+  provider = aws.target
+  name     = random_id.cross_account_target_no_ec2_permission_name.dec
+
+  assume_role_policy = jsonencode({
+    Version = "2012-10-17"
+    Statement = [
+      {
+        Action    = ["sts:AssumeRole", "sts:SetSourceIdentity"]
+        Effect    = "Allow"
+        Principal = { AWS = aws_iam_role.cross_account_principal.arn }
+      },
+    ]
+  })
+
+  tags = {
+    "boundary-demo" = local.hashicorp_email
+  }
+}
+
+output "cross_account_target_no_ec2_permission_arn" {
+  value = aws_iam_role.cross_account_target_no_ec2_permission.arn
+}
+
+# ---------------------------------------------------------------------------
+# Account B: error case — principal cannot assume this target (second hop denied)
+# ---------------------------------------------------------------------------
+
+resource "random_id" "cross_account_target_no_trust_name" {
+  prefix      = "BoundaryPluginCATargetNoTrust"
+  byte_length = 4
+}
+
+resource "aws_iam_role" "cross_account_target_no_trust" {
+  provider = aws.target
+  name     = random_id.cross_account_target_no_trust_name.dec
+
+  assume_role_policy = jsonencode({
+    Version = "2012-10-17"
+    Statement = [
+      {
+        Action    = ["sts:AssumeRole", "sts:SetSourceIdentity"]
+        Effect    = "Deny"
+        Principal = { AWS = aws_iam_role.cross_account_principal.arn }
+      },
+    ]
+  })
+
+  tags = {
+    "boundary-demo" = local.hashicorp_email
+  }
+}
+
+output "cross_account_target_no_trust_arn" {
+  value = aws_iam_role.cross_account_target_no_trust.arn
+}
+
+# ---------------------------------------------------------------------------
+# Account B: EC2 instance for cross-account host discovery validation
+# ---------------------------------------------------------------------------
+
+data "aws_availability_zones" "target_azs" {
+  count    = var.target_access_key_id != "" ? 1 : 0
+  provider = aws.target
+}
+
+data "aws_ami" "target_ubuntu" {
+  count       = var.target_access_key_id != "" ? 1 : 0
+  provider    = aws.target
+  most_recent = true
+
+  filter {
+    name   = "name"
+    values = ["ubuntu/images/hvm-ssd/ubuntu-focal-20.04-amd64-server-*"]
+  }
+
+  filter {
+    name   = "virtualization-type"
+    values = ["hvm"]
+  }
+
+  owners = ["099720109477"] # Canonical
+}
+
+resource "aws_vpc" "target_vpc" {
+  count                            = var.target_access_key_id != "" ? 1 : 0
+  provider                         = aws.target
+  cidr_block                       = "10.1.0.0/16"
+  assign_generated_ipv6_cidr_block = true
+}
+
+resource "aws_subnet" "target_subnet" {
+  count                           = var.target_access_key_id != "" ? 1 : 0
+  provider                        = aws.target
+  vpc_id                          = aws_vpc.target_vpc[0].id
+  cidr_block                      = aws_vpc.target_vpc[0].cidr_block
+  ipv6_cidr_block                 = cidrsubnet(aws_vpc.target_vpc[0].ipv6_cidr_block, 8, 0)
+  availability_zone               = data.aws_availability_zones.target_azs[0].names[0]
+  map_public_ip_on_launch         = true
+  assign_ipv6_address_on_creation = true
+}
+
+resource "aws_instance" "target_instances" {
+  count         = var.target_access_key_id != "" ? length(local.instance_tags) : 0
+  provider      = aws.target
+  ami           = data.aws_ami.target_ubuntu[0].id
+  instance_type = "t3.nano"
+  subnet_id     = aws_subnet.target_subnet[0].id
+
+  tags = local.instance_tags[count.index]
+}
+
+output "target_instance_ids" {
+  value = aws_instance.target_instances.*.id
+}
+
+output "target_instance_tags" {
+  value = {
+    for _, r in aws_instance.target_instances : r.id => r.tags
+  }
+}

testing/testdata/host/main.tf

@@ -1,11 +1,11 @@
-# Copyright (c) HashiCorp, Inc.
+# Copyright IBM Corp. 2021, 2026
 # SPDX-License-Identifier: MPL-2.0
 
 terraform {
   required_providers {
     aws = {
       source  = "hashicorp/aws"
-      version = "~> 3.0"
+      version = "~> 6.0"
     }
   }
 }

testing/testdata/host/variable.tf

@@ -0,0 +1,49 @@
+# Copyright IBM Corp. 2021, 2026
+# SPDX-License-Identifier: MPL-2.0
+
+data "aws_caller_identity" "current" {}
+
+variable "iam_user_count" {
+  default = 6
+}
+
+# We are using a shared account for testing so make sure the stale ec2
+# machine tags don't match for this test run
+resource "random_id" "foo_key" {
+  prefix      = "foo"
+  byte_length = 4
+}
+
+resource "random_id" "bar_key" {
+  prefix      = "bar"
+  byte_length = 4
+}
+
+resource "random_id" "baz_key" {
+  prefix      = "baz"
+  byte_length = 4
+}
+
+locals {
+  hashicorp_email = split(":", data.aws_caller_identity.current.user_id)[1]
+
+  instance_tags = [
+    {
+      "${random_id.foo_key.dec}" = "true"
+    },
+    {
+      "${random_id.foo_key.dec}" = "true"
+      "${random_id.bar_key.dec}" = "true"
+    },
+    {
+      "${random_id.bar_key.dec}" = "true"
+    },
+    {
+      "${random_id.bar_key.dec}" = "true"
+      "${random_id.baz_key.dec}" = "true"
+    },
+    {
+      "${random_id.baz_key.dec}" = "true"
+    },
+  ]
+}

testing/testdata/host/vpc_ec2.tf

@@ -1,28 +1,6 @@
-# Copyright (c) HashiCorp, Inc.
+# Copyright IBM Corp. 2021, 2026
 # SPDX-License-Identifier: MPL-2.0
 
-variable "instance_tags" {
-  default = [
-    {
-      "foo" = "true",
-    },
-    {
-      "foo" = "true",
-      "bar" = "true",
-    },
-    {
-      "bar" = "true",
-    },
-    {
-      "bar" = "true",
-      "baz" = "true",
-    },
-    {
-      "baz" = "true",
-    },
-  ]
-}
-
 data "aws_availability_zones" "azs" {}
 
 data "aws_ami" "ubuntu" {
@@ -43,21 +21,116 @@ data "aws_ami" "ubuntu" {
 
 resource "aws_vpc" "vpc" {
   cidr_block                       = "10.0.0.0/16"
+  assign_generated_ipv6_cidr_block = true
 }
 
 resource "aws_subnet" "subnet" {
   vpc_id                          = aws_vpc.vpc.id
   cidr_block                      = aws_vpc.vpc.cidr_block
+  ipv6_cidr_block                 = cidrsubnet(aws_vpc.vpc.ipv6_cidr_block, 8, 0)
   availability_zone               = data.aws_availability_zones.azs.names[0]
+  map_public_ip_on_launch         = true
+  assign_ipv6_address_on_creation = true
+}
+
+# Need to add a gateway for public IP addr assignments
+resource "aws_internet_gateway" "igw" {
+  vpc_id = aws_vpc.vpc.id
+}
+
+resource "aws_route_table" "public" {
+  vpc_id = aws_vpc.vpc.id
+
+  route {
+    cidr_block = "0.0.0.0/0"
+    gateway_id = aws_internet_gateway.igw.id
+  }
+
+  route {
+    ipv6_cidr_block = "::/0"
+    gateway_id      = aws_internet_gateway.igw.id
+  }
+}
+
+resource "aws_route_table_association" "public" {
+  subnet_id      = aws_subnet.subnet.id
+  route_table_id = aws_route_table.public.id
 }
 
 resource "aws_instance" "instances" {
-  count         = length(var.instance_tags)
+  count         = length(local.instance_tags)
   ami           = data.aws_ami.ubuntu.id
   instance_type = "t3.nano"
   subnet_id     = aws_subnet.subnet.id
 
-  tags = var.instance_tags[count.index]
+  tags = local.instance_tags[count.index]
+}
+
+resource "aws_instance" "multi_address_instance" {
+  ami                         = data.aws_ami.ubuntu.id
+  instance_type               = "t3.nano"
+  subnet_id                   = aws_subnet.subnet.id
+  secondary_private_ips       = ["10.0.10.10"]
+  ipv6_address_count          = 1
+  associate_public_ip_address = true
+
+  tags = {
+    Name            = "boundary-multi-address-instance"
+    "boundary-demo" = local.hashicorp_email
+  }
+}
+
+resource "aws_network_interface" "multi_address_secondary_eni" {
+  subnet_id      = aws_subnet.subnet.id
+  private_ips    = ["10.0.20.10"]
+  ipv6_addresses = [cidrhost(aws_subnet.subnet.ipv6_cidr_block, 32)]
+
+  tags = {
+    Name            = "boundary-multi-address-secondary-eni"
+    "boundary-demo" = local.hashicorp_email
+  }
+}
+
+resource "aws_network_interface_attachment" "multi_address_secondary_eni" {
+  instance_id          = aws_instance.multi_address_instance.id
+  network_interface_id = aws_network_interface.multi_address_secondary_eni.id
+  device_index         = 1
+}
+
+resource "aws_eip" "multi_address_primary" {
+  domain                    = "vpc"
+  network_interface         = aws_instance.multi_address_instance.primary_network_interface_id
+  associate_with_private_ip = aws_instance.multi_address_instance.private_ip
+  depends_on                = [aws_internet_gateway.igw, aws_route_table_association.public]
+
+  tags = {
+    Name            = "boundary-multi-address-primary-eip"
+    "boundary-demo" = local.hashicorp_email
+  }
+}
+
+resource "aws_eip" "multi_address_primary_secondary_private" {
+  domain                    = "vpc"
+  network_interface         = aws_instance.multi_address_instance.primary_network_interface_id
+  associate_with_private_ip = "10.0.10.10"
+  depends_on                = [aws_internet_gateway.igw, aws_route_table_association.public, aws_instance.multi_address_instance]
+
+  tags = {
+    Name            = "boundary-multi-address-primary-secondary-eip"
+    "boundary-demo" = local.hashicorp_email
+  }
+}
+
+resource "aws_eip" "multi_address_secondary_eni" {
+  domain                    = "vpc"
+  network_interface         = aws_network_interface.multi_address_secondary_eni.id
+  associate_with_private_ip = "10.0.20.10"
+  depends_on                = [aws_internet_gateway.igw, aws_route_table_association.public, aws_network_interface_attachment.multi_address_secondary_eni]
+
+  tags = {
+    Name            = "boundary-multi-address-secondary-eni-eip"
+    "boundary-demo" = local.hashicorp_email
+  }
 }
 
 output "instance_ids" {
@@ -75,3 +148,33 @@ output "instance_tags" {
     for _, r in aws_instance.instances : r.id => r.tags
   }
 }
+
+output "instance_tag_keys" {
+  value = [
+    random_id.foo_key.dec,
+    random_id.bar_key.dec,
+    random_id.baz_key.dec,
+  ]
+}
+
+output "multi_address_instance_id" {
+  value = aws_instance.multi_address_instance.id
+}
+
+output "multi_address_primary_addresses" {
+  value = {
+    private_ip = aws_instance.multi_address_instance.private_ip
+    public_ip  = aws_eip.multi_address_primary.public_ip
+    ipv6       = tolist(aws_instance.multi_address_instance.ipv6_addresses)[0]
+  }
+}
+
+output "multi_address_secondary_addresses" {
+  value = {
+    primary_eni_private_ip   = "10.0.10.10"
+    primary_eni_public_ip    = aws_eip.multi_address_primary_secondary_private.public_ip
+    secondary_eni_private_ip = aws_network_interface.multi_address_secondary_eni.private_ip
+    secondary_eni_public_ip  = aws_eip.multi_address_secondary_eni.public_ip
+    secondary_eni_ipv6       = tolist(aws_network_interface.multi_address_secondary_eni.ipv6_addresses)[0]
+  }
+}

testing/testdata/main.tf

@@ -1,4 +1,4 @@
-# Copyright (c) HashiCorp, Inc.
+# Copyright IBM Corp. 2021, 2026
 # SPDX-License-Identifier: MPL-2.0
 
 resource "random_id" "foo" {

testing/testdata/storage/iam.tf

@@ -1,4 +1,4 @@
-# Copyright (c) HashiCorp, Inc.
+# Copyright IBM Corp. 2021, 2026
 # SPDX-License-Identifier: MPL-2.0
 
 resource "aws_iam_role" "valid" {
@@ -34,10 +34,18 @@ resource "aws_iam_policy" "valid" {
         "s3:GetObject",
         "s3:DeleteObject",
         "s3:GetObjectAttributes",
-        "s3:ListBucket"
+        "s3:ListBucket",
+        "s3:DeleteObject"
       ],
       "Effect": "Allow",
       "Resource": "${aws_s3_bucket.test.arn}*"
+    },
+    {
+      "Action": [
+        "s3:ListBucket"
+      ],
+      "Effect": "Allow",
+      "Resource": "${aws_s3_bucket.test.arn}"
     }
   ]
 
@@ -196,7 +204,7 @@ resource "aws_iam_role_policy_attachment" "missing_delete_obj" {
 # Static Credential Testing
 resource "random_id" "user_name" {
   count       = var.iam_user_count
-  prefix      = "demo-${local.hashicorp_email}-boundary-iam-user"
+  prefix      = "demo-${local.hashicorp_email}" # Do Not Remove/Edit. This is a requirement to obtain access in creating a iam user in the dev account.
   byte_length = 4
 }
 
@@ -204,10 +212,8 @@ resource "aws_iam_user" "test" {
   count                = var.iam_user_count
   name                 = random_id.user_name[count.index].dec
   force_destroy        = true
-  permissions_boundary = "arn:aws:iam::${data.aws_caller_identity.current.account_id}:policy/DemoUser"
-  tags = {
-    "boundary-demo" = local.hashicorp_email
-  }
+  permissions_boundary = "arn:aws:iam::${data.aws_caller_identity.current.account_id}:policy/DemoUser" # Do Not Remove/Edit. This is a requirement to obtain access in creating a iam user in the dev account.
+  tags                 = local.tags
 }
 
 resource "aws_iam_access_key" "test" {
@@ -277,17 +283,15 @@ resource "aws_iam_user_policy_attachment" "missing_delete_obj" {
 # Edge case for missing GetObject permission
 
 resource "random_id" "missing_get_obj" {
-  prefix      =  "demo-${local.hashicorp_email}-boundary-iam-user"
+  prefix      = "demo-${local.hashicorp_email}" # Do Not Remove/Edit. This is a requirement to obtain access in creating a iam user in the dev account.
   byte_length = 4
 }
 
 resource "aws_iam_user" "missing_get_obj" {
   name                 = random_id.missing_get_obj.dec
   force_destroy        = true
-  permissions_boundary = "arn:aws:iam::${data.aws_caller_identity.current.account_id}:policy/DemoUser"
-  tags = {
-    "boundary-demo" = local.hashicorp_email
-  }
+  permissions_boundary = "arn:aws:iam::${data.aws_caller_identity.current.account_id}:policy/DemoUser" # Do Not Remove/Edit. This is a requirement to obtain access in creating a iam user in the dev account.
+  tags                 = local.tags
 }
 
 resource "aws_iam_access_key" "missing_get_obj" {
@@ -302,17 +306,15 @@ resource "aws_iam_user_policy_attachment" "missing_get_obj" {
 # Edge case for missing PutObject permission
 
 resource "random_id" "missing_put_obj" {
-  prefix      =  "demo-${local.hashicorp_email}-boundary-iam-user"
+  prefix      = "demo-${local.hashicorp_email}" # Do Not Remove/Edit. This is a requirement to obtain access in creating a iam user in the dev account.
   byte_length = 4
 }
 
 resource "aws_iam_user" "missing_put_obj" {
   name                 = random_id.missing_put_obj.dec
   force_destroy        = true
-  permissions_boundary = "arn:aws:iam::${data.aws_caller_identity.current.account_id}:policy/DemoUser"
-  tags = {
-    "boundary-demo" = local.hashicorp_email
-  }
+  permissions_boundary = "arn:aws:iam::${data.aws_caller_identity.current.account_id}:policy/DemoUser" # Do Not Remove/Edit. This is a requirement to obtain access in creating a iam user in the dev account.
+  tags                 = local.tags
 }
 
 resource "aws_iam_access_key" "missing_put_obj" {

testing/testdata/storage/main.tf

@@ -1,11 +1,11 @@
-# Copyright (c) HashiCorp, Inc.
+# Copyright IBM Corp. 2021, 2026
 # SPDX-License-Identifier: MPL-2.0
 
 terraform {
   required_providers {
     aws = {
       source  = "hashicorp/aws"
-      version = "~> 3.0"
+      version = "~> 6.0"
     }
   }
 }

testing/testdata/storage/output.tf

@@ -1,4 +1,4 @@
-# Copyright (c) HashiCorp, Inc.
+# Copyright IBM Corp. 2021, 2026
 # SPDX-License-Identifier: MPL-2.0
 
 output "bucket_name" {
@@ -68,3 +68,8 @@ output "iam_secret_access_key_missing_delete_obj" {
   value     = aws_iam_access_key.missing_delete_obj.secret
   sensitive = true
 }
+
+output "s3_pagination_test_object_count" {
+  description = "The number of S3 objects created for each pagination test scenario."
+  value       = local.s3_pagination_test_object_count
+}

testing/testdata/storage/s3.tf

@@ -1,4 +1,4 @@
-# Copyright (c) HashiCorp, Inc.
+# Copyright IBM Corp. 2021, 2026
 # SPDX-License-Identifier: MPL-2.0
 
 resource "aws_s3_bucket" "test" {
@@ -15,3 +15,11 @@ resource "aws_s3_bucket_public_access_block" "secure_access" {
   ignore_public_acls      = true
   restrict_public_buckets = true
 }
+resource "aws_s3_object" "s3_files" {
+  for_each = local.s3_files
+
+  bucket  = aws_s3_bucket.test.id
+  key     = each.key
+  content = each.value
+  tags    = local.tags
+}

testing/testdata/storage/variable.tf

@@ -1,4 +1,4 @@
-# Copyright (c) HashiCorp, Inc.
+# Copyright IBM Corp. 2021, 2026
 # SPDX-License-Identifier: MPL-2.0
 
 data "aws_caller_identity" "current" {}
@@ -19,4 +19,44 @@ locals {
     Repo        = "boundary-plugin-aws"
     Environment = "Demo"
   }
+
+  # total number of objects of each type to create
+  s3_pagination_test_object_count = 350
+  # Dynamically build a flat map of S3 objects:
+  # - root-level text files
+  # - nested JSON files
+  # - placeholder "empty directories"
+  # - some static files in list-objects directory
+  # This map is consumed directly by an aws_s3_object resource
+  s3_files = merge(
+    # Root-level text files
+    {
+      for i in range(local.s3_pagination_test_object_count) :
+      "list-objects-paginated/root-file-${i}.txt" => "This is a root-level file #${i}."
+    },
+
+    # Nested JSON files inside sub-directories
+    {
+      for i in range(local.s3_pagination_test_object_count) :
+      "list-objects-paginated/nested-dir-${i}/data-file-${i}.json" =>
+      jsonencode({
+        id      = i,
+        message = "This is a nested JSON file #${i}."
+      })
+    },
+
+    # "Empty" directories (in S3 these are just placeholder objects ending with `/`)
+    {
+      for i in range(local.s3_pagination_test_object_count) :
+      "list-objects-paginated/empty-dir-${i}/dir-${i}/" => "" # zero-length object to mimic directory
+    },
+
+    # Static example files in list-objects directory
+    {
+      "list-objects/file1.txt"            = "This is the content for file 1."
+      "list-objects/data.json"            = jsonencode({ key = "value", items = [1, 2, 3] })
+      "list-objects/nested-dir/file2.txt" = "This is a nested file."
+      "list-objects/empty-nested-dir/"    = ""
+    }
+  )
 }

testing/testing.go

@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2021, 2026
 // SPDX-License-Identifier: MPL-2.0
 
 package testing
@@ -14,8 +14,8 @@ import (
 	"time"
 
 	"github.com/aws/smithy-go"
-	"github.com/hashicorp/boundary-plugin-aws/internal/credential"
-	"github.com/hashicorp/boundary-plugin-aws/internal/values"
+	"repo.anhonesthost.net/CyberCoveLLC/threshold-plugin-aws/internal/credential"
+	"repo.anhonesthost.net/CyberCoveLLC/threshold-plugin-aws/internal/values"
 	"github.com/hashicorp/go-secure-stdlib/awsutil/v2"
 	tfjson "github.com/hashicorp/terraform-json"
 	"github.com/stretchr/testify/require"
@@ -39,6 +39,10 @@ type TestTerraformer struct {
 	// The working directory for Terraform commands.
 	workDir string
 
+	// vars holds optional key/value pairs passed as -var flags to every
+	// Terraform command that accepts them (apply, destroy, plan).
+	vars map[string]string
+
 	// The Terraform state. Use the Output method to look up particular
 	// outputs from the Terraform state.
 	state *tfjson.State
@@ -53,8 +57,9 @@ type TestTerraformer struct {
 
 // NewTestTerraformer initializes a Terraform directory. It just
 // returns an initialized project, it does not perform any actions on
-// it.
-func NewTestTerraformer(workDir string) (*TestTerraformer, error) {
+// it. An optional vars map may be provided; each entry is passed as a
+// -var flag to Terraform commands.
+func NewTestTerraformer(workDir string, vars ...map[string]string) (*TestTerraformer, error) {
 	tfPath, err := exec.LookPath("terraform")
 	if err != nil {
 		return nil, fmt.Errorf("LookPath error: %w", err)
@@ -64,10 +69,24 @@ func NewTestTerraformer(workDir string) (*TestTerraformer, error) {
 		return nil, errors.New("workDir is empty")
 	}
 
-	return &TestTerraformer{
+	tf := &TestTerraformer{
 		tfPath:  tfPath,
 		workDir: workDir,
-	}, nil
+	}
+	if len(vars) > 0 {
+		tf.vars = vars[0]
+	}
+	return tf, nil
+}
+
+// varArgs converts the stored vars map into a slice of -var flags
+// suitable for appending to a Terraform command's argument list.
+func (t *TestTerraformer) varArgs() []string {
+	args := make([]string, 0, len(t.vars)*2)
+	for k, v := range t.vars {
+		args = append(args, "-var", fmt.Sprintf("%s=%s", k, v))
+	}
+	return args
 }
 
 // Deploy runs the following commands, in order: init, apply, plan,
@@ -214,7 +233,8 @@ func (t *TestTerraformer) init() error {
 
 // apply runs "terraform apply" in the project's working directory.
 func (t *TestTerraformer) apply() error {
-	cmd := exec.Command(t.tfPath, "apply", "-input=false", "-auto-approve")
+	args := append([]string{"apply", "-input=false", "-auto-approve"}, t.varArgs()...)
+	cmd := exec.Command(t.tfPath, args...)
 	cmd.Dir = t.workDir
 	stdoutStderr, err := cmd.CombinedOutput()
 	if err != nil {
@@ -226,7 +246,8 @@ func (t *TestTerraformer) apply() error {
 
 // destroy runs "terraform destroy" in the project's working directory.
 func (t *TestTerraformer) destroy() error {
-	cmd := exec.Command(t.tfPath, "destroy", "-input=false", "-auto-approve")
+	args := append([]string{"destroy", "-input=false", "-auto-approve"}, t.varArgs()...)
+	cmd := exec.Command(t.tfPath, args...)
 	cmd.Dir = t.workDir
 	stdoutStderr, err := cmd.CombinedOutput()
 	if err != nil {
@@ -242,7 +263,8 @@ func (t *TestTerraformer) destroy() error {
 // it's run to get the data for for importing the state via
 // terraform-json. The apply method ignores the plan generated here.
 func (t *TestTerraformer) plan() error {
-	cmd := exec.Command(t.tfPath, "plan", "-input=false", "-out=plan.tfplan")
+	args := append([]string{"plan", "-input=false", "-out=plan.tfplan"}, t.varArgs()...)
+	cmd := exec.Command(t.tfPath, args...)
 	cmd.Dir = t.workDir
 	stdoutStderr, err := cmd.CombinedOutput()
 	if err != nil {

testing/testing_test.go

@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2021, 2026
 // SPDX-License-Identifier: MPL-2.0
 
 package testing