(Swift 3,4,5...) SSH Public Key Authentication

Demonstrates how to authenticate with an SSH server using public key authentication.

Chilkat Downloads for the Swift Programming Language MAC OS X (Cocoa) Objective-C/Swift Libs iOS Objective-C/Swift Libs

func chilkatTest() {
    // This example assumes the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    let ssh = CkoSsh()!

    // Set some timeouts, in milliseconds:
    ssh.connectTimeoutMs = 5000
    ssh.idleTimeoutMs = 15000

    // Connect to the SSH server.  
    // The standard SSH port = 22
    // The hostname may be a hostname or IP address.
    var hostname: String? = "sftp.example.com"
    var port: Int = 22
    var success: Bool = ssh.connect(hostname, port: port)
    if success != true {
        print("\(ssh.lastErrorText!)")
        return
    }

    let key = CkoSshKey()!

    // Read the PEM file into a string variable:
    // (This does not load the PEM file into the key.  The LoadText
    // method is a convenience method for loading the full contents of ANY text
    // file into a string variable.)
    var privKey: String? = key.loadText("myPrivateKey.pem")
    if key.lastMethodSuccess != true {
        print("\(key.lastErrorText!)")
        return
    }

    // Load a private key from a PEM string:
    // (Private keys may be loaded from OpenSSH and Putty formats.
    // Both encrypted and unencrypted private key file formats
    // are supported.  This example loads an unencrypted private
    // key in OpenSSH format.  PuTTY keys typically use the .ppk
    // file extension, while OpenSSH keys use the PEM format.
    // (For PuTTY keys, call FromPuttyPrivateKey instead.)
    success = key.fromOpenSshPrivateKey(privKey)
    if success != true {
        print("\(key.lastErrorText!)")
        return
    }

    // Authenticate with the SSH server using the login and
    // private key.  (The corresponding public key should've 
    // been installed on the SSH server beforehand.)
    success = ssh.authenticatePk("myLogin", privateKey: key)
    if success != true {
        print("\(ssh.lastErrorText!)")
        return
    }

    print("\(ssh.lastErrorText!)")
    print("Public-Key Authentication Successful!")

}