Example #1
0
func NewTunnelledSSHClient(user, tunaddr, tgtaddr string, checker *HostKeyChecker, agentForwarding bool) (*SSHForwardingClient, error) {
	clientConfig, err := sshClientConfig(user, checker)
	if err != nil {
		return nil, err
	}

	tunaddr = maybeAddDefaultPort(tunaddr)
	tgtaddr = maybeAddDefaultPort(tgtaddr)

	var tunnelClient *gossh.Client
	dialFunc := func(echan chan error) {
		var err error
		tunnelClient, err = gossh.Dial("tcp", tunaddr, clientConfig)
		echan <- err
	}
	err = timeoutSSHDial(dialFunc)
	if err != nil {
		return nil, err
	}

	var targetConn net.Conn
	dialFunc = func(echan chan error) {
		tgtTCPAddr, err := net.ResolveTCPAddr("tcp", tgtaddr)
		if err != nil {
			echan <- err
			return
		}
		targetConn, err = tunnelClient.DialTCP("tcp", nil, tgtTCPAddr)
		echan <- err
	}
	err = timeoutSSHDial(dialFunc)
	if err != nil {
		return nil, err
	}

	c, chans, reqs, err := gossh.NewClientConn(targetConn, tgtaddr, clientConfig)
	if err != nil {
		return nil, err
	}
	return newSSHForwardingClient(gossh.NewClient(c, chans, reqs), agentForwarding)
}
Example #2
0
// ForwardToAgent routes authentication requests to the given keyring.
func ForwardToAgent(client *ssh.Client, keyring Agent) error {
	channels := client.HandleChannelOpen(channelType)
	if channels == nil {
		return errors.New("agent: already have handler for " + channelType)
	}

	go func() {
		for ch := range channels {
			channel, reqs, err := ch.Accept()
			if err != nil {
				continue
			}
			go ssh.DiscardRequests(reqs)
			go func() {
				ServeAgent(keyring, channel)
				channel.Close()
			}()
		}
	}()
	return nil
}
Example #3
0
// ForwardToRemote routes authentication requests to the ssh-agent
// process serving on the given unix socket.
func ForwardToRemote(client *ssh.Client, addr string) error {
	channels := client.HandleChannelOpen(channelType)
	if channels == nil {
		return errors.New("agent: already have handler for " + channelType)
	}
	conn, err := net.Dial("unix", addr)
	if err != nil {
		return err
	}
	conn.Close()

	go func() {
		for ch := range channels {
			channel, reqs, err := ch.Accept()
			if err != nil {
				continue
			}
			go ssh.DiscardRequests(reqs)
			go forwardUnixSocket(channel, addr)
		}
	}()
	return nil
}