(Node.js) Load RSA Public Key from Hex Modulus and Exponent

Load an RSA public key from a hex modulus and exponent.

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() {

    var success;

    // Load a 128-byte (1024-bit) modulus + exponent into a Chilkat public key object..
    var modulus = "BF5F4AF9A018B5F324A0C10448C0D3248D9BE78967FDC551A27876AC5789ADCBA8245D3D942AE3799563D895DA801E765D225A54FA15DAB2C4731DD817DCF94A9AD62197074C2349442093A206234BF3747F0E88AA6F538355684CC1FB26FCE029C9050A1DAF9F507C2BABF6EFC9FB16320C8036721BE0279FBB76122C41E429";

    var exponent = "00000003";

    // We'll need to re-encode from hex to base64..
    var bdModulus = new chilkat.BinData();
    bdModulus.AppendEncoded(modulus,"hex");
    var bdExponent = new chilkat.BinData();
    bdExponent.AppendEncoded(exponent,"hex");

    var xml = new chilkat.Xml();
    xml.Tag = "RsaKeyValue";
    xml.NewChild2("Modulus",bdModulus.GetEncoded("base64"));
    xml.NewChild2("Exponent",bdExponent.GetEncoded("base64"));

    // Now load into the pubkey object..
    var pubkey = new chilkat.PublicKey();
    success = pubkey.LoadFromString(xml.GetXml());
    if (success == false) {
        console.log(pubkey.LastErrorText);
        return;
    }

    console.log("Success.");

}

chilkatExample();