Swift

S/MIME Encrypt using Certificate in Apple Keychain

See more Apple Keychain Examples

Encrypts MIME to creates S/MIME using a certificate found in the Apple Keychain. Swift

func chilkatTest() {
    var success: Bool = false

    let cert = CkoCert()!

    // Load the certificate by the Subject Common Name
    // On MacOS and iOS, Chilkat will search the Keychain(s) for the matching certificate.
    success = cert.load(byCommonName: "My Cert")
    if success == false {
        print("\(cert.lastErrorText!)")
        return
    }

    // Note: The private key is not needed for encryption.
    // Only the certificate is needed.

    // Create a simple MIME message to encrypt.
    let mime = CkoMime()!
    mime.addHeaderField(name: "Subject", value: "test")
    mime.addHeaderField(name: "SomeHeader", value: "123")
    mime.addHeaderField(name: "Content-Type", value: "text/plain")
    mime.setBody(str: "This is the body.")

    print("\(mime.getMime()!)")
    print("----")

    // Here's the MIME to be encrypted:

    // Subject: test
    // SomeHeader: 123
    // Content-Type: text/plain
    // 
    // This is the body.

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

    // Show the encrypted MIME (S/MIME)
    print("\(mime.getMime()!)")

    // Save the encrypted MIME to a file.
    mime.save(path: "./encrypted.mime")

    // Here's the S/MIME

    // Subject: test
    // SomeHeader: 123
    // Content-Type: application/x-pkcs7-mime; name="smime.p7m"; smime-type="enveloped-data"
    // Content-Disposition: attachment; filename="smime.p7m"
    // Content-Transfer-Encoding: base64
    // 
    // MIICSwYJKoZIhvcNAQcDoIICPDCCAjgCAQAxggGzMIIBrwIBADCBljCBgTELMAkGA1UEBhMCSVQx
    // EDAOBgNVBAgMB0JlcmdhbW8xGTAXBgNVBAcMEFBvbnRlIFNhbiBQaWV0cm8xFzAVBgNVBAoMDkFj
    // dGFsaXMgUy5wLkEuMSwwKgYDVQQDDCNBY3RhbGlzIENsaWVudCBBdXRoZW50aWNhdGlvbiBDQSBH
    // MwIQPCWvkSv8oQ7xRmEHJ6TzEDANBgkqhkiG9w0BAQEFAASCAQB3VZvHRE5EWxug7Sckpcz1ucDZ
    // YiTKiqmyPt75MhzNRQLtKFx/jWwlemUwnPMzeu6yutCkZ74Bdn7MBsfDqV3bUz43wAu+fRBteGvF
    // mTc00MfY8L7o8dkpj4AqAOCj4hKQzbSE99GvSzyXcPE2Gm5NrOPtKxqfFqbBRTCb4fBZP84LaL+x
    // rnYfrM4qXTppixyN8iFYCd4maEbMu/GA5o+j0BkDDnx42pILDoAGV/ERyx55Y3Nc2Mhm/cITBMNn
    // g7uS9KPrlYizNaqVu09Hi9jg4gdZaRiTjUqg05tSOk/YqIQxTgfscwSPY92/ewpI6e1EHtLt8Q33
    // gWCbERptSntUMHwGCSqGSIb3DQEHATAdBglghkgBZQMEAQIEENm1AxeXlEMx7p6McjHIj5CAUEQj
    // 0GuJ5LnTqiqIjOiwmwNidl1N1TRluxX5vAQvwBuYE6bQK4+i04yn2Av3cucW4kvxgP2Nmni+XgQt
    // aPPKlasaVceEeZ15IYjw77/m3YYn

}