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.
70 lines
1.9 KiB
Go
70 lines
1.9 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 ShellRequestType = "shell"
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// ShellRequest is a chunk to contain data for an SSH Shell request
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type ShellRequest struct {
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*bsr.BaseChunk
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*pssh.ShellRequest
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}
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// MarshalData serializes an ShellRequest chunk
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func (r *ShellRequest) MarshalData(ctx context.Context) ([]byte, error) {
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const op = "ssh.(SessionRequest).MarshalData"
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dataBytes, err := proto.Marshal(r.ShellRequest)
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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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// NewShellRequest creates an ShellRequest chunk
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func NewShellRequest(ctx context.Context, d bsr.Direction, t *bsr.Timestamp, r *gssh.Request) (*ShellRequest, error) {
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const op = "ssh.NewShellRequest"
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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 != ShellRequestType {
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return nil, fmt.Errorf("%s: request type must be %q: %w", op, ShellRequestType, 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, ShellReqChunkType)
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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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reqData := &ShellRequest{
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BaseChunk: baseChunk,
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ShellRequest: &pssh.ShellRequest{
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RequestType: r.Type,
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WantReply: r.WantReply,
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},
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}
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return reqData, nil
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}
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