SFTP Authenticate with a SecureString Password and Private Key

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Demonstrates the Chilkat SFtp.AuthenticateSecPwPk method, which authenticates using SecureString login and password objects together with a private key. The third argument is the SshKey private key.

Note: The private-key path is relative to the application's current working directory. Supply the path to your own key file.

func chilkatTest() {
    var success: Bool = false

    //  Demonstrates the SFtp.AuthenticateSecPwPk method, which authenticates using SecureString login
    //  and password objects together with a private key.  The 1st argument is the username, the 2nd
    //  is the password, and the 3rd is an SshKey private key.

    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
    }

    //  Normally you would not hard-code the password in source.  You should instead obtain it
    //  from an interactive prompt, environment variable, or a secrets vault.
    var password: String? = "mySshPassword"

    //  Load the SSH private key.  LoadText reads the file's text, which is then imported.
    let privKey = CkoSshKey()!
    var keyText: String? = privKey.loadText(path: "qa_data/id_rsa")
    if privKey.lastMethodSuccess == false {
        print("\(privKey.lastErrorText!)")
        return
    }

    success = privKey.fromOpenSshPrivateKey(keyStr: keyText)
    if success == false {
        print("\(privKey.lastErrorText!)")
        return
    }

    //  Place the login and password into SecureString objects.
    let secureLogin = CkoSecureString()!
    secureLogin.append(str: "mySshLogin")
    let securePassword = CkoSecureString()!
    securePassword.append(str: password)

    success = sftp.authenticateSecPwPk(username: secureLogin, password: securePassword, privateKey: privKey)
    if success == false {
        print("\(sftp.lastErrorText!)")
        return
    }

    //  Step 3: Open the SFTP subsystem.  This must be done after authentication and before any
    //  file or directory operations.
    success = sftp.initializeSftp()
    if success == false {
        print("\(sftp.lastErrorText!)")
        return
    }

    print("Authenticated.")

    sftp.disconnect()

}