JavaScript

Set the Decryption Certificate and Private Key

Demonstrates the Chilkat Email.SetDecryptCert2 method, which explicitly provides a certificate and its corresponding private key as separate objects for decrypting a received encrypted email. Set them before loading the encrypted message. This example loads a .cer certificate and a PEM private key, sets both, then loads an encrypted email.

Background: Sometimes the certificate and its private key are stored separately — a public .cer file plus a PEM (or other format) key file — rather than combined in a PFX. SetDecryptCert2 accepts the two objects individually, which is the natural fit for that arrangement. It is the two-object counterpart to SetDecryptCert, which takes a single certificate that already carries its private key.

Note

This example is intended for running within a Chilkat.Js embedded JavaScript engine. All Chilkat JavaScript examples require Chilkat v11.4.0 or greater.

JavaScript

var success = false;

//  Demonstrates the SetDecryptCert2 method, which explicitly provides a certificate and its
//  corresponding private key (as separate objects) for decrypting a received encrypted
//  email.  Set them before loading the encrypted email.

var email = new CkEmail();

//  Load the certificate (public) and the matching private key from separate files.
var cert = new CkCert();
success = cert.LoadFromFile("qa_data/certs/recipient.cer");
if (success == false) {
    console.log(cert.LastErrorText);
    return true;
}

var privKey = new CkPrivateKey();
success = privKey.LoadPemFile("qa_data/certs/recipient_privkey.pem");
if (success == false) {
    console.log(privKey.LastErrorText);
    return true;
}

//  Provide the certificate and private key to use for decryption.
success = email.SetDecryptCert2(cert,privKey);
if (success == false) {
    console.log(email.LastErrorText);
    return true;
}

//  Load the encrypted email; Chilkat decrypts it using the certificate and key.
success = email.LoadEml("qa_data/eml/encrypted.eml");
if (success == false) {
    console.log(email.LastErrorText);
    return true;
}

console.log("Decrypted = " + email.Decrypted);

//  Note: Paths such as "qa_data/..." are relative local filesystem paths,
//  relative to the current working directory of the running application.