(JavaScript) 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.

Note: This example requires Chilkat v11.0.0 or greater.

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

Note

This example is intended for running within a Chilkat.Js embedded JavaScript engine. All Chilkat JavaScript examples require Chilkat v11.4.0 or greater.

var success = false;

// 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 CkRsa();

// Generate a 2048-bit key.
var privkey = new CkPrivateKey();
success = rsa.GenKey(2048,privkey);
if (success == false) {
    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.
success = privkey.SavePemFile("qa_data/pem/abnAmroPrivateKey.pem");

var pubkey = new CkPublicKey();
privkey.ToPublicKey(pubkey);
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 CkJwt();

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

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 == false) {
    console.log(jwt.LastErrorText);
    return;
}

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