(Swift 3,4,5...) Encrypt MIME using PEM Certificate

Encrypt MIME using a PEM 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 requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    let mime = CkoMime()!

    // Create a simple MIME message to be encrypted:
    var success: Bool = mime.addHeaderField("Content-Type", value: "text/plain")
    success = mime.addHeaderField("abc", value: "123")
    mime.setBody("This is a test")

    let cert = CkoCert()!
    success = cert.load(fromFile: "qa_data/pem/mf_public_rsa.pem")
    if success == false {
        print("\(cert.lastErrorText!)")
        return
    }

    // Encrypt the MIME.
    success = mime.encrypt(cert)
    if success == false {
        print("\(mime.lastErrorText!)")
        return
    }

    // Display the MIME:
    print("\(mime.getMime()!)")

    // The resulting S/MIME looks like this:

    // Content-Type: application/x-pkcs7-mime; name="smime.p7m"; smime-type="enveloped-data"
    // abc: 123
    // Content-Disposition: attachment; filename="smime.p7m"
    // Content-Transfer-Encoding: base64
    // 
    // MIICMAYJKoZIhvcNAQcDoIICITCCAh0CAQAxggGoMIIBpAIBADCBizB3MQswCQYDVQQGEwJQTDEi
    // MCAGA1UEChMZVW5pemV0byBUZWNobm9sb2dpZXMgUy5BLjEnMCUGA1UECxMeQ2VydHVtIENlcnRp
    // ZmljYXRpb24gQXV0aG9yaXR5MRswGQYDVQQDExJDZXJ0dW0gTGV2ZWwgSVYgQ0ECEDVuXbie8bb5
    // sHeajm5k3ZYwDQYJKoZIhvcNAQEBBQAEggEADNac7gEUOvTWfyqwe0cS+m65Lte7ZmDGRElvqeo7
    // C2+JZJfuxl2Roy+4vTovnn+9U2Yf5Kqc1m2ZPCE5Q8ExvOV4M0cTocLNLK6sfCR7cvo1xgf220qf
    // XYqWF1/ePuP9j1FrkFvBOoS4BREAnXsEa4zvuhvNPsMfjInK8wWnMftbLUiriAZBq391D+dxxX8M
    // kB1EHCWaS3H8WQI/caTnkRS6YdOCOrctJHtotkcU+4gcIxfTcq6yeloceURbesAYAvdRbIGszKCQ
    // FA2sC1x8SkDQCHfNUvmyS/fmkq5waFpmq1ksOspInb4ZM7SOjEUu+22vkAgbTmOS3MUdieuRcTBs
    // BgkqhkiG9w0BBwEwHQYJYIZIAWUDBAECBBClRoHLQZyzdHwoZA6pZjLYgEChuMzbQRXOjNF3RpnI
    // ZjNTKFDuhaUqk0rRTTn3D89F7ZMUBtoCP0bw+bH5UE9zpDaAgCF9s3W3/D5YNgAuw4AZ

}