Swift

Set Cert and Private Key for S/MIME Decryption

Demonstrates the Chilkat Imap.SetDecryptCert2 method, which specifies a certificate together with a separately supplied private key for decrypting S/MIME messages. The first argument is the Cert and the second is the PrivateKey. This example loads the certificate and key from separate files.

Note: The certificate path is relative to the application's current working directory. Supply the path to your own certificate file.

Background: Sometimes the certificate (the public part) and the private key are stored separately — a .cer alongside a PEM key file, for instance. This method pairs them explicitly, whereas SetDecryptCert expects a single Cert that already provides its private key. After the pairing, subsequently downloaded S/MIME messages are decrypted automatically.

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Swift


func chilkatTest() {
    var success: Bool = false

    //  Demonstrates the Imap.SetDecryptCert2 method, which specifies a certificate together with a
    //  separately supplied private key for decrypting S/MIME messages.  The 1st argument is the
    //  Cert and the 2nd is the PrivateKey.

    let imap = CkoImap()!

    imap.ssl = true
    imap.port = 993

    success = imap.connect(hostname: "imap.example.com")
    if success == false {
        print("\(imap.lastErrorText!)")
        return
    }

    success = imap.login(login: "user@example.com", password: "myPassword")
    if success == false {
        print("\(imap.lastErrorText!)")
        return
    }

    //  Load the certificate and its private key from separate files.
    let cert = CkoCert()!
    success = cert.load(fromFile: "qa_data/smime.cer")
    if success == false {
        print("\(cert.lastErrorText!)")
        return
    }

    let privKey = CkoPrivateKey()!
    success = privKey.loadPemFile(path: "qa_data/smime_privkey.pem")
    if success == false {
        print("\(privKey.lastErrorText!)")
        return
    }

    //  Use the cert and key to automatically decrypt subsequently downloaded S/MIME messages.
    success = imap.setDecryptCert2(cert: cert, key: privKey)
    if success == false {
        print("\(imap.lastErrorText!)")
        return
    }

    success = imap.disconnect()
    if success == false {
        print("\(imap.lastErrorText!)")
        return
    }


}