(Node.js) RSASSA-PSS Algorithm with SHA256 Hashing

RSA encrypt a SHA256 hash with OAEP padding.

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

    var privkey = new chilkat.PrivateKey();

    // Load the private key object from a PEM file.
    // (To load from a PEM string, call LoadPem instead.)
    var success = privkey.LoadPemFile("somePath/myPrivateKey.pem");
    if (success !== true) {
        console.log(privkey.LastErrorText);
        return;
    }

    var rsa = new chilkat.Rsa();
    // Use RSA-PSS by setting OaepPadding = true
    rsa.OaepPadding = true;
    // Use SHA256
    rsa.OaepHash = "SHA-256";

    rsa.ImportPrivateKeyObj(privkey);

    // Generate a base64 signature.
    rsa.EncodingMode = "base64";

    var sigStr = rsa.SignStringENC("String to be signed","SHA-256");
    if (rsa.LastMethodSuccess !== true) {
        console.log(rsa.LastErrorText);
        return;
    }

    console.log("Signature: " + sigStr);

}

chilkatExample();