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
2.6 KiB
Go
85 lines
2.6 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 WindowChangeRequestType = "window-change"
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// WindowChangeRequest is a chunk to contain data for an SSH Window Change request
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type WindowChangeRequest struct {
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*bsr.BaseChunk
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*pssh.WindowChangeRequest
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}
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// MarshalData serializes an WindowChangeRequest chunk
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func (r *WindowChangeRequest) MarshalData(ctx context.Context) ([]byte, error) {
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const op = "ssh.(WindowChangeRequest).MarshalData"
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dataBytes, err := proto.Marshal(r.WindowChangeRequest)
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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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// NewWindowChangeRequest creates a WindowChangeRequest chunk
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func NewWindowChangeRequest(ctx context.Context, d bsr.Direction, t *bsr.Timestamp, r *gssh.Request) (*WindowChangeRequest, error) {
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const op = "ssh.NewWindowChangeRequest"
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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 != WindowChangeRequestType {
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return nil, fmt.Errorf("%s: request type must be %q: %w", op, WindowChangeRequestType, 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, WindowChangeReqChunkType)
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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 windowChangeSigval
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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 := &WindowChangeRequest{
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BaseChunk: baseChunk,
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WindowChangeRequest: &pssh.WindowChangeRequest{
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RequestType: r.Type,
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WantReply: r.WantReply,
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TerminalWidthColumns: sigval.TerminalWidthColumns,
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TerminalHeightRows: sigval.TerminalHeightRows,
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TerminalWidthPixels: sigval.TerminalWidthPixels,
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TerminalHeightPixels: sigval.TerminalHeightPixels,
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},
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}
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return reqData, nil
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}
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type windowChangeSigval struct {
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TerminalWidthColumns uint32
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TerminalHeightRows uint32
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TerminalWidthPixels uint32
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TerminalHeightPixels uint32
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}
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