79 lines
2.2 KiB
Go
79 lines
2.2 KiB
Go
// Copyright IBM Corp. 2020, 2026
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// SPDX-License-Identifier: BUSL-1.1
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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 SubsystemRequestType = "subsystem"
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// SubsystemRequest is a chunk to contain data for an SSH Subsystem request
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type SubsystemRequest struct {
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*bsr.BaseChunk
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*pssh.SubsystemRequest
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}
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// MarshalData serializes an SubsystemRequest chunk
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func (r *SubsystemRequest) MarshalData(ctx context.Context) ([]byte, error) {
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const op = "ssh.(SubsystemRequest).MarshalData"
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dataBytes, err := proto.Marshal(r.SubsystemRequest)
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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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// NewSubsystemRequest creates an SubsystemRequest chunk
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func NewSubsystemRequest(ctx context.Context, d bsr.Direction, t *bsr.Timestamp, r *gssh.Request) (*SubsystemRequest, error) {
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const op = "ssh.NewSubsystemRequest"
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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 != SubsystemRequestType {
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return nil, fmt.Errorf("%s: request type must be %q: %w", op, SubsystemRequestType, 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, SubsystemReqChunkType)
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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 subsystemSigval
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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 := &SubsystemRequest{
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BaseChunk: baseChunk,
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SubsystemRequest: &pssh.SubsystemRequest{
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RequestType: r.Type,
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WantReply: r.WantReply,
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SubsystemName: sigval.SubsystemName,
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},
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}
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return reqData, nil
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}
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type subsystemSigval struct {
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SubsystemName string
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}
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