Share an Existing SSH Tunnel (Socket) with IMAP

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Demonstrates the Chilkat Imap.UseSshTunnel method, which uses an existing SSH tunnel, represented by a Socket object, for IMAP connections. The only argument is the Socket. Call it before Connect. This example opens and authenticates the tunnel on a Socket, then routes IMAP through it.

func chilkatTest() {
    var success: Bool = false

    //  Demonstrates the Imap.UseSshTunnel method, which uses an existing SSH tunnel (represented by
    //  a Socket) for IMAP connections.  The only argument is the Socket.  Call it before Connect.

    let imap = CkoImap()!

    //  Open and authenticate an SSH tunnel on a Socket object.  This tunnel can be shared with
    //  other Chilkat objects.
    let sshTunnel = CkoSocket()!
    var sshPort: Int = 22
    success = sshTunnel.sshOpenTunnel(sshHostname: "ssh.example.com", sshPort: sshPort)
    if success == false {
        print("\(sshTunnel.lastErrorText!)")
        return
    }

    //  The SSH password is not hard-coded in source.  Insert code here to obtain it from an
    //  interactive prompt, environment variable, or a secrets vault.
    var sshPassword: String?

    success = sshTunnel.sshAuthenticatePw(sshLogin: "sshUser", sshPassword: sshPassword)
    if success == false {
        print("\(sshTunnel.lastErrorText!)")
        return
    }

    //  Tell the Imap object to use the existing tunnel.
    success = imap.useSshTunnel(tunnel: sshTunnel)
    if success == false {
        print("\(imap.lastErrorText!)")
        return
    }

    //  Now connect and log in to the IMAP server through the tunnel.
    imap.ssl = true
    imap.port = 993
    success = imap.connect(hostname: "imap.example.com")
    if success == false {
        print("\(imap.lastErrorText!)")
        return
    }

    success = imap.login(login: "user@example.com", password: "myPassword")
    if success == false {
        print("\(imap.lastErrorText!)")
        return
    }

    success = imap.disconnect()
    if success == false {
        print("\(imap.lastErrorText!)")
        return
    }


}