(Node.js) RSA Encrypt and OpenSSL Decrypt

Demonstrates how to use Chilkat to RSA encrypt, and then use OpenSSL to decrypt.

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

    var rsa = new chilkat.Rsa();

    var privKey = new chilkat.PrivateKey();
    success = rsa.GenKey(2048,privKey);
    success = privKey.SavePkcs8PemFile("qa_output/privKey.pem");

    var pubKey = new chilkat.PublicKey();
    privKey.ToPublicKey(pubKey);

    rsa.EncodingMode = "base64";
    var plainText = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz01234567890";
    var bUsePrivateKey = false;
    rsa.UsePublicKey(pubKey);
    var encryptedStr = rsa.EncryptStringENC(plainText,bUsePrivateKey);

    var bd = new chilkat.BinData();
    bd.AppendEncoded(encryptedStr,"base64");
    success = bd.WriteFile("qa_output/enc.dat");

    // The OpenSSL command to decrypt is:
    // openssl pkeyutl -in enc.dat -inkey privKey.pem -keyform PEM -pkeyopt rsa_padding_mode:pkcs1 -decrypt

    console.log("OK");

}

chilkatExample();