Swift

Get the SSH Server's Authentication Methods

Demonstrates the Chilkat Ssh.GetAuthMethods method, which queries a connected but unauthenticated SSH server for the authentication methods it advertises. It takes no arguments and returns a lowercase, comma-separated list such as publickey,password,keyboard-interactive. Call it after Connect and before authenticating.

Background: Knowing what the server accepts lets a client choose the right authentication path — for example, falling back to keyboard-interactive when password auth is not offered. Note the documented connection side effect: querying methods advances the SSH authentication state, so call it at the correct point in the sequence.

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Swift


func chilkatTest() {
    var success: Bool = false

    //  Demonstrates the Ssh.GetAuthMethods method, which queries a connected but unauthenticated SSH
    //  server for the authentication methods it advertises.  It takes no arguments and returns a
    //  lowercase, comma-separated list such as "publickey,password,keyboard-interactive".

    let ssh = CkoSsh()!

    //  Connect to the SSH server.  Port 22 is the usual SSH port.
    var sshPort: Int = 22
    success = ssh.connect(hostname: "ssh.example.com", port: sshPort)
    if success == false {
        print("\(ssh.lastErrorText!)")
        return
    }

    //  Query the advertised authentication methods.  Call after Connect, before authenticating.
    var methods: String? = ssh.getAuthMethods()
    if ssh.lastMethodSuccess == false {
        print("\(ssh.lastErrorText!)")
        return
    }

    print("Server auth methods: \(methods!)")

    ssh.disconnect()

}