(Node.js) RSA Sign Using Private Key from .pfx/.p12 to Base64 Signature

See more RSA Examples

Note: This example requires Chilkat v11.0.0 or greater.

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() {

    var success = false;

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

    var rsa = new chilkat.Rsa();

    // Load the .pfx/.p12
    var pfx = new chilkat.Pfx();
    success = pfx.LoadPfxFile("qa_data/pfx/myKey.p12","myPassword");
    if (success == false) {
        console.log(pfx.LastErrorText);
        return;
    }

    // Get the default private key.
    // privKey: PrivateKey
    var privKey = pfx.GetPrivateKey(0);
    if (pfx.LastMethodSuccess == false) {
        console.log(pfx.LastErrorText);
        return;
    }

    // Import the private key into the RSA component:
    success = rsa.UsePrivateKey(privKey);
    if (success !== true) {
        console.log(rsa.LastErrorText);

        return;
    }

    // Get the signature in base64
    rsa.EncodingMode = "base64";

    var strData = "This is the string to be signed.";

    // Sign the string using the sha256 hash algorithm.
    // Other valid choices are "sha384", "sha512", "sha-1", "md2" and "md5".
    var base64Sig = rsa.SignStringENC(strData,"sha256");

    console.log(base64Sig);

    console.log("Success!");

}

chilkatExample();