func ExampleSession_RequestPty() {
// Create client config
config := &ssh.ClientConfig{
User: "******",
Auth: []ssh.AuthMethod{
ssh.Password("password"),
},
}
// Connect to ssh server
conn, err := ssh.Dial("tcp", "localhost:22", config)
if err != nil {
log.Fatalf("unable to connect: %s", err)
}
defer conn.Close()
// Create a session
session, err := conn.NewSession()
if err != nil {
log.Fatalf("unable to create session: %s", err)
}
defer session.Close()
// Set up terminal modes
modes := ssh.TerminalModes{
ssh.ECHO: 0, // disable echoing
ssh.TTY_OP_ISPEED: 14400, // input speed = 14.4kbaud
ssh.TTY_OP_OSPEED: 14400, // output speed = 14.4kbaud
}
// Request pseudo terminal
if err := session.RequestPty("xterm", 80, 40, modes); err != nil {
log.Fatalf("request for pseudo terminal failed: %s", err)
}
// Start remote shell
if err := session.Shell(); err != nil {
log.Fatalf("failed to start shell: %s", err)
}
}
func ExampleDial() {
// An SSH client is represented with a ClientConn. Currently only
// the "password" authentication method is supported.
//
// To authenticate with the remote server you must pass at least one
// implementation of AuthMethod via the Auth field in ClientConfig.
config := &ssh.ClientConfig{
User: "******",
Auth: []ssh.AuthMethod{
ssh.Password("yourpassword"),
},
}
client, err := ssh.Dial("tcp", "yourserver.com:22", config)
if err != nil {
panic("Failed to dial: " + err.Error())
}
// Each ClientConn can support multiple interactive sessions,
// represented by a Session.
session, err := client.NewSession()
if err != nil {
panic("Failed to create session: " + err.Error())
}
defer session.Close()
// Once a Session is created, you can execute a single command on
// the remote side using the Run method.
var b bytes.Buffer
session.Stdout = &b
if err := session.Run("/usr/bin/whoami"); err != nil {
panic("Failed to run: " + err.Error())
}
fmt.Println(b.String())
}
func ExampleClient_Listen() {
config := &ssh.ClientConfig{
User: "******",
Auth: []ssh.AuthMethod{
ssh.Password("password"),
},
}
// Dial your ssh server.
conn, err := ssh.Dial("tcp", "localhost:22", config)
if err != nil {
log.Fatalf("unable to connect: %s", err)
}
defer conn.Close()
// Request the remote side to open port 8080 on all interfaces.
l, err := conn.Listen("tcp", "0.0.0.0:8080")
if err != nil {
log.Fatalf("unable to register tcp forward: %v", err)
}
defer l.Close()
// Serve HTTP with your SSH server acting as a reverse proxy.
http.Serve(l, http.HandlerFunc(func(resp http.ResponseWriter, req *http.Request) {
fmt.Fprintf(resp, "Hello world!\n")
}))
}
func Tunnel(app string, dbEnvVar string, identity string, port int) error {
environ, err := api.VariablesListWithoutAlias(app)
if err != nil {
return errgo.Mask(err)
}
dbUrlStr := dbEnvVarValue(dbEnvVar, environ)
if dbUrlStr == "" {
return errgo.Newf("no such environment variable: %s", dbEnvVar)
}
dbUrl, err := url.Parse(dbUrlStr)
if err != nil {
return errgo.Notef(err, "invalid database 'URL': %s", dbUrlStr)
}
fmt.Printf("Building tunnel to %s\n", dbUrl.Host)
var privateKeys []ssh.Signer
if identity == "ssh-agent" {
var agentConnection io.Closer
privateKeys, agentConnection, err = sshkeys.ReadPrivateKeysFromAgent()
if err != nil {
return errgo.Mask(err)
}
defer agentConnection.Close()
}
if len(privateKeys) == 0 {
identity = sshkeys.DefaultKeyPath
privateKey, err := sshkeys.ReadPrivateKey(identity)
if err != nil {
return errgo.Mask(err)
}
privateKeys = append(privateKeys, privateKey)
}
debug.Println("Identity used:", identity)
var client *ssh.Client
for _, privateKey := range privateKeys {
sshConfig := &ssh.ClientConfig{
User: "******",
Auth: []ssh.AuthMethod{ssh.PublicKeys(privateKey)},
}
client, err = ssh.Dial("tcp", config.C.SshHost, sshConfig)
if err == nil {
break
} else {
config.C.Logger.Println("Fail to connect to the SSH server", err)
}
}
if client == nil {
return errgo.Newf("No authentication method has succeeded, please use the flag '-i /path/to/private/key' to specify your private key")
}
tcpAddr, err := net.ResolveTCPAddr("tcp", fmt.Sprintf("localhost:%d", port))
if err != nil {
return errgo.Mask(err)
}
sock, err := net.ListenTCP("tcp", tcpAddr)
if err != nil {
return errgo.Mask(err)
}
defer sock.Close()
fmt.Printf("You can access your database on '%v'\n", sock.Addr())
go startIDGenerator()
errs := make(chan error)
for {
select {
case err := <-errs:
return errgo.Mask(err)
default:
}
connToTunnel, err := sock.Accept()
if err != nil {
return errgo.Mask(err)
}
go handleConnToTunnel(client, dbUrl, connToTunnel, errs)
}
}
