(Swift 2) HTTP - Verify Server is a Trusted Root CA

Demonstrates how to only allow connections to an HTTP server having a certificate with a root that is in our list of trusted CA root certificates.

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

func chilkatTest() {
    // Starting in v9.5.0.49, all Chilkat classes can be unlocked at once at the beginning of a program
    // by calling UnlockBundle.  It requires a Bundle unlock code.
    let chilkatGlob = CkoGlobal()
    var success: Bool = chilkatGlob.UnlockBundle("Anything for 30-day trial.")
    if success != true {
        print("\(chilkatGlob.LastErrorText)")
        return
    }

    //  On my particular system, the root CA cert for this URL is not pre-installed.
    //  Note: This may be different for you.
    //  Also, this example was written on 29-May-2015.  This URL was valid at the time,
    //  but may not be valid at a future date.
    var url: String? = "https://animals.nationalgeographic.com/animals/invertebrates/starfish/"

    let http = CkoHttp()

    //  Require that the SSL/TLS server certificate is not expired,
    //  and that the certificate signature is valid.
    //  This does not ensure that it has a chain of authentication to
    //  a trusted root.  To ensure that, the TrustedRoots object (below) is required.
    http.RequireSslCertVerify = true

    //  Do the HTTPS page fetch (through the SSH tunnel)
    var html: String? = http.QuickGetStr(url)
    if http.LastMethodSuccess != true {
        print("\(http.LastErrorText)")
        return
    }

    print("The HTTP GET was successful.")

    //  Now let's require that HTTP requests to SSL/TLS servers that don't have trusted CA roots
    //  should fail.
    let trustedRoots = CkoTrustedRoots()

    //  Indicate that we will trust any pre-installed certificates on this system.
    //  (The meaning of pre-installed certificates depends on the operating system, and in
    //  some environments there is no such thing as pre-installed certificates.  See the reference
    //  documentation for the TrustedRoots class.)
    trustedRoots.TrustSystemCaRoots = true

    //  Activate the trusted roots globally for all Chilkat objects.
    //  This call really shouldn't fail, so we're not checking the return value.
    success = trustedRoots.Activate()

    //  Given that our previous HTTP GET likely kept the connection open,
    //  make sure that all HTTP connections are closed before re-trying.
    //  Otherwise, we'll simply be re-using the pre-existing connection.
    success = http.CloseAllConnections()

    //  Now let's try fetching the URL again.  It should fail this time because
    //  there is a requirement that the SSL/TLS server certificate must have a trusted root,
    //  and the trusted root for this URL is not installed on my system (but may be different for you..)
    html = http.QuickGetStr(url)
    if http.LastMethodSuccess != true {
        print("\(http.LastErrorText)")
        print("Good, the HTTP request failed as expected.")
    }
    else {
        print("\(http.LastErrorText)")
        print("Hmmm... we did not fail as expected?")
    }


}