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

See more RSA Examples

Demonstrates how to RSA sign something using a private key loaded from a .pfx/.p12. The RSA signature is returned in Base64 encoded format.

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-node21-win-ia32');
    } else {
        var chilkat = require('@chilkat/ck-node21-win64'); 
    }
} else if (os.platform() == 'linux') {
    if (os.arch() == 'arm') {
        var chilkat = require('@chilkat/ck-node21-arm');
    } else if (os.arch() == 'x86') {
        var chilkat = require('@chilkat/ck-node21-linux32');
    } else {
        var chilkat = require('@chilkat/ck-node21-linux64');
    }
} else if (os.platform() == 'darwin') {
    if (os.arch() == 'arm64') {
        var chilkat = require('@chilkat/ck-node21-mac-m1');
    } else {
        var chilkat = require('@chilkat/ck-node21-macosx');
    }
}

function chilkatExample() {

    // 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();
    var success = pfx.LoadPfxFile("qa_data/pfx/myKey.p12","myPassword");
    if (success !== true) {
        console.log(pfx.LastErrorText);
        return;
    }

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

    // Import the private key into the RSA component:
    success = rsa.ImportPrivateKeyObj(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();