Set Cert and Private Key for S/MIME Decryption

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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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    success := 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.

    imap := chilkat.NewImap()

    imap.SetSsl(true)
    imap.SetPort(993)

    success = imap.Connect("imap.example.com")
    if success == false {
        fmt.Println(imap.LastErrorText())
        imap.DisposeImap()
        return
    }

    success = imap.Login("user@example.com","myPassword")
    if success == false {
        fmt.Println(imap.LastErrorText())
        imap.DisposeImap()
        return
    }

    //  Load the certificate and its private key from separate files.
    cert := chilkat.NewCert()
    success = cert.LoadFromFile("qa_data/smime.cer")
    if success == false {
        fmt.Println(cert.LastErrorText())
        imap.DisposeImap()
        cert.DisposeCert()
        return
    }

    privKey := chilkat.NewPrivateKey()
    success = privKey.LoadPemFile("qa_data/smime_privkey.pem")
    if success == false {
        fmt.Println(privKey.LastErrorText())
        imap.DisposeImap()
        cert.DisposeCert()
        privKey.DisposePrivateKey()
        return
    }

    //  Use the cert and key to automatically decrypt subsequently downloaded S/MIME messages.
    success = imap.SetDecryptCert2(cert,privKey)
    if success == false {
        fmt.Println(imap.LastErrorText())
        imap.DisposeImap()
        cert.DisposeCert()
        privKey.DisposePrivateKey()
        return
    }

    success = imap.Disconnect()
    if success == false {
        fmt.Println(imap.LastErrorText())
        imap.DisposeImap()
        cert.DisposeCert()
        privKey.DisposePrivateKey()
        return
    }


    imap.DisposeImap()
    cert.DisposeCert()
    privKey.DisposePrivateKey()