Swift

Start SSH Keyboard-Interactive Authentication

Demonstrates the Chilkat Ssh.StartKeyboardAuth method, which begins keyboard-interactive authentication. The only argument is the login name. It returns XML describing the server's prompts and whether each response should be echoed. Answer the prompts with ContinueKeyboardAuth.

Background: Keyboard-interactive is the flexible, prompt-driven SSH method — the server sends one or more questions (a password, a one-time code, a security question) and the client answers each. It is how SSH supports two-factor and other challenge-response schemes. The returned XML tells you exactly what to ask the user and whether to mask their input.

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Swift


func chilkatTest() {
    var success: Bool = false

    //  Demonstrates the Ssh.StartKeyboardAuth method, which begins keyboard-interactive
    //  authentication.  The only argument is the login name.  It returns XML describing the server's
    //  prompts and whether each response should be echoed.

    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
    }

    //  Begin keyboard-interactive authentication.  The returned XML describes the prompts.
    var infoRequestXml: String? = ssh.startKeyboardAuth(login: "mySshLogin")
    if ssh.lastMethodSuccess == false {
        print("\(ssh.lastErrorText!)")
        return
    }

    print("\(infoRequestXml!)")

    //  Answer the prompt(s) with ContinueKeyboardAuth.

    ssh.disconnect()

}