Swift

SSH Tunnel Authenticate with a Password

Demonstrates the Chilkat SshTunnel.AuthenticatePw method, which authenticates the SSH connection with a login name and password. The first argument is the login and the second is the password. Connect first, and call BeginAccepting afterward.

Background: Password authentication is the simplest option, but the password is a secret and should never be a hard-coded literal — obtain it from an interactive prompt, an environment variable, or a secrets vault. Public-key authentication is generally preferred for the unattended, long-running services that tunnels often are.

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Swift


func chilkatTest() {
    var success: Bool = false

    //  Demonstrates the SshTunnel.AuthenticatePw method, which authenticates the SSH connection with
    //  a login name and password.  The 1st argument is the login and the 2nd is the password.

    let tunnel = CkoSshTunnel()!

    //  The tunnel forwards accepted local connections to this destination through the SSH server.
    tunnel.destHostname = "db.internal.example.com"
    tunnel.destPort = 5432

    //  Connect to the SSH server.  This performs the TCP/proxy connection and SSH handshake, but
    //  does not authenticate yet.
    var sshPort: Int = 22
    success = tunnel.connect(hostname: "ssh.example.com", port: sshPort)
    if success == false {
        print("\(tunnel.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"

    success = tunnel.authenticatePw(login: "mySshLogin", password: password)
    if success == false {
        print("\(tunnel.lastErrorText!)")
        return
    }

    print("Authenticated.")

    //  After authenticating, call BeginAccepting to start listening for local connections to forward.

    var waitForThreadExit: Bool = true
    success = tunnel.closeTunnel(waitForThreads: waitForThreadExit)
    if success == false {
        print("\(tunnel.lastErrorText!)")
        return
    }


}