func newServerShell(ch *serverChan, prompt string) *ServerTerminal {
term := terminal.NewTerminal(ch, prompt)
return &ServerTerminal{
Term: term,
Channel: ch,
}
}
func ExampleListen() {
// An SSH server is represented by a ServerConfig, which holds
// certificate details and handles authentication of ServerConns.
config := &ServerConfig{
PasswordCallback: func(conn *ServerConn, user, pass string) bool {
return user == "testuser" && pass == "tiger"
},
}
privateBytes, err := ioutil.ReadFile("id_rsa")
if err != nil {
panic("Failed to load private key")
}
private, err := ParsePrivateKey(privateBytes)
if err != nil {
panic("Failed to parse private key")
}
config.AddHostKey(private)
// Once a ServerConfig has been configured, connections can be
// accepted.
listener, err := Listen("tcp", "0.0.0.0:2022", config)
if err != nil {
panic("failed to listen for connection")
}
sConn, err := listener.Accept()
if err != nil {
panic("failed to accept incoming connection")
}
if err := sConn.Handshake(); err != nil {
panic("failed to handshake")
}
// A ServerConn multiplexes several channels, which must
// themselves be Accepted.
for {
// Accept reads from the connection, demultiplexes packets
// to their corresponding channels and returns when a new
// channel request is seen. Some goroutine must always be
// calling Accept; otherwise no messages will be forwarded
// to the channels.
channel, err := sConn.Accept()
if err != nil {
panic("error from Accept")
}
// Channels have a type, depending on the application level
// protocol intended. In the case of a shell, the type is
// "session" and ServerShell may be used to present a simple
// terminal interface.
if channel.ChannelType() != "session" {
channel.Reject(UnknownChannelType, "unknown channel type")
continue
}
channel.Accept()
term := terminal.NewTerminal(channel, "> ")
serverTerm := &ServerTerminal{
Term: term,
Channel: channel,
}
go func() {
defer channel.Close()
for {
line, err := serverTerm.ReadLine()
if err != nil {
break
}
fmt.Println(line)
}
}()
}
}