(Node.js) ABN AMRO Create Signed JSON Web Token

Demonstrates how to create a signed JWT to be used for authenticating requests to the ABN AMRO REST API's.

For more information, see https://developer.abnamro.com/get-started#headingFive

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() {

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

    // Create public/private key pair (RSA)
    var rsa = new chilkat.Rsa();

    // Generate a 2048-bit key.
    var success = rsa.GenerateKey(2048);
    if (success !== true) {
        console.log(rsa.LastErrorText);
        return;
    }

    // Export the key to PEM files.
    // Write one PEM file for the private key, and one for the public key.
    // privkey: PrivateKey
    var privkey = rsa.ExportPrivateKeyObj();
    success = privkey.SavePemFile("qa_data/pem/abnAmroPrivateKey.pem");

    // pubkey: PublicKey
    var pubkey = rsa.ExportPublicKeyObj();
    success = pubkey.SavePemFile(true,"qa_data/pem/abnAmroPublicKey.pem");
    // Note: Please share your public key along with your app name and developer email id at api.support@nl.abnamro.com. 
    // Token generation will not work unless public key is associated with your app.

    // Create the JWT.
    var jwt = new chilkat.Jwt();

    // Create the header:
    // {
    //     "typ": "JWT",
    //     "alg": "RS256"
    // }
    var jsonHeader = new chilkat.JsonObject();
    jsonHeader.UpdateString("typ","JWT");
    jsonHeader.UpdateString("alg","RS256");

    // Create the payload:
    // {
    //     "nbf": 1499947668,
    //     "exp": 1499948668,
    //     "iss": "me",
    //     "sub": "anApiKey",
    //     "aud": "https://auth-sandbox.abnamro.com/oauth/token"
    // }
    var jsonPayload = new chilkat.JsonObject();

    var curDateTime = jwt.GenNumericDate(0);

    // Set the "not process before" timestamp to now.
    success = jsonPayload.AddIntAt(-1,"nbf",curDateTime);

    // Set the timestamp defining an expiration time (end time) for the token
    // to be now + 1 hour (3600 seconds)
    success = jsonPayload.AddIntAt(-1,"exp",curDateTime+3600);

    jsonPayload.UpdateString("iss","me");
    jsonPayload.UpdateString("sub","anApiKey");
    jsonPayload.UpdateString("aud","https://auth-sandbox.abnamro.com/oauth/token");

    // Produce the smallest possible JWT:
    jwt.AutoCompact = true;

    var jwtStr = jwt.CreateJwtPk(jsonHeader.Emit(),jsonPayload.Emit(),privkey);
    if (jwt.LastMethodSuccess !== true) {
        console.log(jwt.LastErrorText);
        return;
    }

    // Here is the JWT:
    console.log(jwtStr);

}

chilkatExample();