(Node.js) Use Base64 RSA Key to Encrypt

Loads a Base64 RSA key and uses it to encrypt a string, returning the result in base64.

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 pubkey = new chilkat.PublicKey();

    var success = pubkey.LoadBase64("MIICdgIBADA ... A9PXLk+j5A==");
    if (success !== true) {
        console.log(pubkey.LastErrorText);
        return;
    }

    var rsa = new chilkat.Rsa();

    success = rsa.ImportPublicKeyObj(pubkey);
    if (success !== true) {
        console.log(rsa.LastErrorText);
        return;
    }

    rsa.EncodingMode = "base64";

    var encryptedStr = rsa.EncryptStringENC("12345678",false);

    console.log(encryptedStr);

}

chilkatExample();