(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, MacOSX, and ARM

var os = require('os');
if (os.platform() == 'win32') {  
    if (os.arch() == 'ia32') {
        var chilkat = require('@chilkat/ck-node11-win-ia32');
    } else {
        var chilkat = require('@chilkat/ck-node11-win64'); 
    }
} else if (os.platform() == 'linux') {
    if (os.arch() == 'arm') {
        var chilkat = require('@chilkat/ck-node11-arm');
    } else if (os.arch() == 'x86') {
        var chilkat = require('@chilkat/ck-node11-linux32');
    } else {
        var chilkat = require('@chilkat/ck-node11-linux64');
    }
} else if (os.platform() == 'darwin') {
    var chilkat = require('@chilkat/ck-node11-macosx');
}

function chilkatExample() {

    var mime = new chilkat.Mime();

    var success;
    success = mime.UnlockComponent("Anything for 30-day trial");
    if (success == false) {
        console.log(mime.LastErrorText);
        return;
    }

    // Load the certificate from a .cer file.
    var cert = new chilkat.Cert();
    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();