Swift

Start SFTP Keyboard-Interactive Authentication

Demonstrates the Chilkat SFtp.StartKeyboardAuth method, which begins keyboard-interactive authentication. The only argument is the login name. It returns XML describing the server's prompts, which are answered with ContinueKeyboardAuth.

Background: Keyboard-interactive is the prompt-driven authentication method: rather than assuming a single password, the server sends one or more questions — a password, a one-time code, a security question — and the client answers each. This is how SFTP supports two-factor and other challenge-response schemes. The returned XML tells you exactly what to ask and whether to mask the input.

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Swift


func chilkatTest() {
    var success: Bool = false

    //  Demonstrates the SFtp.StartKeyboardAuth method, which begins keyboard-interactive
    //  authentication.  The only argument is the login name.  It returns XML describing the server's
    //  prompts, which are answered with ContinueKeyboardAuth.

    let sftp = CkoSFtp()!

    //  Step 1: Connect the SSH transport.  Port 22 is the usual port.
    var port: Int = 22
    success = sftp.connect(hostname: "sftp.example.com", port: port)
    if success == false {
        print("\(sftp.lastErrorText!)")
        return
    }

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

    print("\(infoRequestXml!)")

    //  Answer the prompt(s) with ContinueKeyboardAuth, then call InitializeSftp.

    sftp.disconnect()

}