(Swift 3,4,5...) Socket TLS Mutual Authentication (Client-Side Certificate)

This example demonstrates how to provide a client-side certificate, also known as "two-way authentication" or "mutual authentication" for servers that require a client certificate.

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 sock = CkoSocket()!

    // Set the certificate to be used for mutual TLS authentication
    // (i.e. sets the client-side certificate for two-way TLS authentication)
    var success: Bool = sock.setSslClientCertPfx("/home/bob/pfxFiles/myClientSideCertWithPrivateKey.pfx", pfxPassword: "pfxPassword")
    if success != true {
        print("\(sock.lastErrorText!)")
        return
    }

    // Note: The certificate used for the client-side of TLS mutual authentication
    // must have the associated private key available. (.pfx/.p12 files typically store both
    // the certificate and associated private key.)

    // Establish the connection using the socket object (with client certificate authentication).
    var bTls: Bool = true
    var port: Int = 443
    var maxWaitMs: Int = 5000
    success = sock.connect("www.example.com", port: port, ssl: bTls, maxWaitMs: maxWaitMs)
    if success != true {
        print("Connect Failure Error Code: \(sock.connectFailReason.intValue)")
        print("\(sock.lastErrorText!)")
        return
    }

    // At this point, the Socket object is connected and authenticated using the client-side cert

    // ...
    // ..

}