(Node.js) Load JWK into PublicKey Object

Demonstrates how to load a Java Web Key (JWK) into a Chilkat public key object.

Note: This example requires Chilkat v9.5.0.66 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, 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() {

    // Imagine we have this JWK:

    // {
    // "kty":"RSA",
    // "kid":"bilbo.baggins@hobbiton.example",
    // "use":"sig",
    // "n":"26381066103266289976070039679240841999340706859156341823971393693544846472963839705790075117105560154606562987481050889935247188300178764426769543782451174831475924241862817098997865881169498995546309260357488285676768114714548754913374731868063116787903918383610614912211576698081222844057810710088656983077876282582286966085572172471849443305250452393766960762340311496052418952315081937000716222751229644449475751932222180738210988190709824209639002026650048655399108647971010890335494074025258268035713167380057822555485524738518699437692145859633592396626258745090144803752145540471688039673495588314804430463791",
    // "e":"65537"
    // }
    // 

    var sbJwk = new chilkat.StringBuilder();
    var success = sbJwk.LoadFile("qa_data/jwk/simple_jwk_rsa.json","utf-8");
    if (success !== true) {
        console.log("Failed to load simple JWK file.");
        return;
    }

    // Loading it into a Chilkat public key object is easy:
    var pubkey = new chilkat.PublicKey();
    success = pubkey.LoadFromString(sbJwk.GetAsString());
    if (success !== true) {
        console.log(pubkey.LastErrorText);
        return;
    }

    console.log("Simple JWK loaded into public key object.");

    // ----------------------------------------------------------------------------------------------------------
    // Demonstrate how to load a JWK that is contained within JSON into a public key object.

    // {
    //   "alg":"RS256",
    //   "jwk":  {
    //           "kty":"RSA",
    //           "kid":"bilbo.baggins@hobbiton.example",
    //           "use":"sig",
    //           "n":"26381066103266289976070039679240841999340706859156341823971393693544846472963839705790075117105560154606562987481050889935247188300178764426769543782451174831475924241862817098997865881169498995546309260357488285676768114714548754913374731868063116787903918383610614912211576698081222844057810710088656983077876282582286966085572172471849443305250452393766960762340311496052418952315081937000716222751229644449475751932222180738210988190709824209639002026650048655399108647971010890335494074025258268035713167380057822555485524738518699437692145859633592396626258745090144803752145540471688039673495588314804430463791",
    //           "e":"65537"
    //           }
    // }

    var sbJwk2 = new chilkat.StringBuilder();
    success = sbJwk2.LoadFile("qa_data/jwk/contained_jwk_rsa.json","utf-8");
    if (success !== true) {
        console.log("Failed to load JWK file.");
        return;
    }

    // Get the "jwk" part of the JSON..
    var json = new chilkat.JsonObject();
    json.Load(sbJwk2.GetAsString());

    // jsonJwk: JsonObject
    var jsonJwk = json.ObjectOf("jwk");
    if (json.LastMethodSuccess !== true) {
        console.log("No jwk member exists.");
        return;
    }

    var pubkey2 = new chilkat.PublicKey();
    success = pubkey2.LoadFromString(jsonJwk.Emit());
    if (success !== true) {
        console.log(pubkey2.LastErrorText);
        return;
    }

    console.log("Contained JWK loaded into public key object.");


}

chilkatExample();