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.
85 lines
2.4 KiB
Go
85 lines
2.4 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 ExitSignalRequestType = "exit-signal"
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// ExitSignalRequest is a chunk to contain data for an SSH Exit Signal request
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type ExitSignalRequest struct {
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*bsr.BaseChunk
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*pssh.ExitSignalRequest
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}
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// MarshalData serializes an ExitSignalRequest chunk
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func (r *ExitSignalRequest) MarshalData(ctx context.Context) ([]byte, error) {
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const op = "ssh.(ExitSignalRequest).MarshalData"
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dataBytes, err := proto.Marshal(r.ExitSignalRequest)
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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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// NewExitSignalRequest creates an ExitSignalRequest chunk
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func NewExitSignalRequest(ctx context.Context, d bsr.Direction, t *bsr.Timestamp, r *gssh.Request) (*ExitSignalRequest, error) {
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const op = "ssh.NewExitSignalRequest"
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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 != ExitSignalRequestType {
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return nil, fmt.Errorf("%s: request type must be %q: %w", op, ExitSignalRequestType, 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, ExitSignalReqChunkType)
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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 exitSignalSigval
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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 := &ExitSignalRequest{
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BaseChunk: baseChunk,
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ExitSignalRequest: &pssh.ExitSignalRequest{
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RequestType: r.Type,
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WantReply: r.WantReply,
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SignalName: sigval.SignalName,
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CoreDumped: sigval.CoreDumped,
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ErrorMessage: sigval.ErrorMessage,
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LanguageTag: sigval.LanguageTag,
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},
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}
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return reqData, nil
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}
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type exitSignalSigval struct {
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SignalName string
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CoreDumped bool
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ErrorMessage string
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LanguageTag string
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}
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