コード例 #1
0
ファイル: client.go プロジェクト: asemt/sectra
func parseKey(in []byte) (out *Key, rest []byte, err error) {
	var record struct {
		Blob    []byte
		Comment string
		Rest    []byte `ssh:"rest"`
	}

	if err := ssh.Unmarshal(in, &record); err != nil {
		return nil, nil, err
	}

	var wk wireKey
	if err := ssh.Unmarshal(record.Blob, &wk); err != nil {
		return nil, nil, err
	}

	return &Key{
		Format:  wk.Format,
		Blob:    record.Blob,
		Comment: record.Comment,
	}, record.Rest, nil
}
コード例 #2
0
ファイル: client.go プロジェクト: asemt/sectra
// unmarshal parses an agent message in packet, returning the parsed
// form and the message type of packet.
func unmarshal(packet []byte) (interface{}, error) {
	if len(packet) < 1 {
		return nil, errors.New("agent: empty packet")
	}
	var msg interface{}
	switch packet[0] {
	case agentFailure:
		return new(failureAgentMsg), nil
	case agentSuccess:
		return new(successAgentMsg), nil
	case agentIdentitiesAnswer:
		msg = new(identitiesAnswerAgentMsg)
	case agentSignResponse:
		msg = new(signResponseAgentMsg)
	default:
		return nil, fmt.Errorf("agent: unknown type tag %d", packet[0])
	}
	if err := ssh.Unmarshal(packet, msg); err != nil {
		return nil, err
	}
	return msg, nil
}
コード例 #3
0
ファイル: client.go プロジェクト: asemt/sectra
// Sign has the agent sign the data using a protocol 2 key as defined
// in [PROTOCOL.agent] section 2.6.2.
func (c *client) Sign(key ssh.PublicKey, data []byte) (*ssh.Signature, error) {
	req := ssh.Marshal(signRequestAgentMsg{
		KeyBlob: key.Marshal(),
		Data:    data,
	})

	msg, err := c.call(req)
	if err != nil {
		return nil, err
	}

	switch msg := msg.(type) {
	case *signResponseAgentMsg:
		var sig ssh.Signature
		if err := ssh.Unmarshal(msg.SigBlob, &sig); err != nil {
			return nil, err
		}

		return &sig, nil
	case *failureAgentMsg:
		return nil, errors.New("agent: failed to sign challenge")
	}
	panic("unreachable")
}