(Node.js) AddDetachedSignaturePk

Demonstrates how to add a detached signature using a certifcate and it's corresponding private key. The easiest way of doing it is when both the certificate and private key are contained together within a PFX (.pfx or .p12) file. This example demonstrates how to use the certificate and its corresponding private key when they are stored in separate files -- a .cer for the certificate, and a .pem for the private key.

Install Chilkat for Node.js and Electron using npm at Chilkat npm packages for Node.js Chilkat npm packages for Electron on Windows, Linux, MacOS

var os = require('os');
if (os.platform() == 'win32') {  
  var chilkat = require('@chilkat/ck-node23-win64'); 
} else if (os.platform() == 'linux') {
    if (os.arch() == 'arm') {
        var chilkat = require('@chilkat/ck-node23-linux-arm');
    } else if (os.arch() == 'arm64') {
        var chilkat = require('@chilkat/ck-node23-linux-arm64');
    } else {
        var chilkat = require('@chilkat/ck-node23-linux-x64');
    }
} else if (os.platform() == 'darwin') {
  var chilkat = require('@chilkat/ck-node23-mac-universal');
}

function chilkatExample() {

    // This example assumes the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    var mime = new chilkat.Mime();

    // Load the certificate from a .cer file.
    var cert = new chilkat.Cert();
    var success = cert.LoadFromFile("aaworkarea/myCert.cer");
    if (success == false) {
        console.log(cert.LastErrorText);
        return;
    }

    // Load the private key from an encrypted PEM file.
    // (A private key can be loaded from other file formats also..)
    var privKey = new chilkat.PrivateKey();
    success = privKey.LoadEncryptedPemFile("aaworkarea/myPrivateKey.pem","myPassword");
    if (success == false) {
        console.log(privKey.LastErrorText);
        return;
    }

    success = mime.SetBodyFromPlainText("This is the plain-text MIME body.");

    // Sign the MIME (adds a PKCS7 detached signature)
    success = mime.AddDetachedSignaturePk(cert,privKey);
    if (success == false) {
        console.log(mime.LastErrorText);
        return;
    }

    // Save the S/MIME to a file.
    success = mime.SaveMime("aaworkarea/signedMime.txt");
    if (success == false) {
        console.log(mime.LastErrorText);
        return;
    }

    console.log("success!");

}

chilkatExample();