Timothy Messier
f983a05a3e
This adds a function for decoding all of the SSH Chunk types and registers the function with the chunk types so that the bsr.ChunkDecode can be used to decode SSH Chunks.
81 lines
2.1 KiB
Go
81 lines
2.1 KiB
Go
// Copyright (c) HashiCorp, Inc.
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// SPDX-License-Identifier: MPL-2.0
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package ssh
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import (
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"context"
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"fmt"
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"github.com/hashicorp/boundary/internal/bsr"
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pssh "github.com/hashicorp/boundary/internal/bsr/gen/ssh/v1"
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"github.com/hashicorp/boundary/internal/bsr/internal/is"
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gssh "golang.org/x/crypto/ssh"
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"google.golang.org/protobuf/proto"
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)
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const EnvRequestType = "env"
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// EnvRequest is a chunk to contain data for an SSH Env request
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type EnvRequest struct {
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*bsr.BaseChunk
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*pssh.EnvRequest
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}
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// MarshalData serializes an EnvRequest chunk
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func (r *EnvRequest) MarshalData(ctx context.Context) ([]byte, error) {
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const op = "ssh.(EnvRequest).MarshalData"
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dataBytes, err := proto.Marshal(r.EnvRequest)
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if err != nil {
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return nil, fmt.Errorf("%s: failed to marshal data: %w", op, err)
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}
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d := make([]byte, 0, len(dataBytes))
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d = append(d, dataBytes...)
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return d, nil
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}
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// NewEnvRequest creates an EnvRequest chunk
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func NewEnvRequest(ctx context.Context, d bsr.Direction, t *bsr.Timestamp, r *gssh.Request) (*EnvRequest, error) {
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const op = "ssh.NewEnvRequest"
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if is.Nil(r) {
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return nil, fmt.Errorf("%s: request cannot be nil: %w", op, bsr.ErrInvalidParameter)
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}
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if r.Type != EnvRequestType {
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return nil, fmt.Errorf("%s: request type must be %q: %w", op, EnvRequestType, bsr.ErrInvalidParameter)
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}
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if !bsr.ValidDirection(d) {
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return nil, fmt.Errorf("%s: invalid direction: %w", op, bsr.ErrInvalidParameter)
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}
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if is.Nil(t) {
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return nil, fmt.Errorf("%s: timestamp cannot be nil: %w", op, bsr.ErrInvalidParameter)
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}
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baseChunk, err := bsr.NewBaseChunk(ctx, Protocol, d, t, EnvReqChunkType)
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if err != nil {
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return nil, fmt.Errorf("%s: unable to create base chunk: %w", op, err)
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}
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var sigval envSigval
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if err := gssh.Unmarshal(r.Payload, &sigval); err != nil {
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return nil, fmt.Errorf("%s: unable to unmarshal payload: %w", op, err)
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}
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reqData := &EnvRequest{
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BaseChunk: baseChunk,
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EnvRequest: &pssh.EnvRequest{
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RequestType: r.Type,
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WantReply: r.WantReply,
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VariableName: sigval.Name,
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VariableValue: sigval.Value,
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},
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}
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return reqData, nil
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}
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type envSigval struct {
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Name string
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Value string
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}
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