(PHP Extension) 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

Chilkat PHP Downloads PHP Extension for Windows, Linux, MacOS, Alpine Linux, Solaris

<?php

// The version number (9_5_0) should match version of the Chilkat extension used, omitting the micro-version number.
// For example, if using Chilkat v9.5.0.48, then include as shown here:
include("chilkat_9_5_0.php");

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

// Create public/private key pair (RSA)
$rsa = new CkRsa();

// Generate a 2048-bit key.
$success = $rsa->GenerateKey(2048);
if ($success != true) {
    print $rsa->lastErrorText() . "\n";
    exit;
}

// Export the key to PEM files.
// Write one PEM file for the private key, and one for the public key.
// privkey is a CkPrivateKey
$privkey = $rsa->ExportPrivateKeyObj();
$success = $privkey->SavePemFile('qa_data/pem/abnAmroPrivateKey.pem');

// pubkey is a CkPublicKey
$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.
$jwt = new CkJwt();

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

$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->put_AutoCompact(true);

$jwtStr = $jwt->createJwtPk($jsonHeader->emit(),$jsonPayload->emit(),$privkey);
if ($jwt->get_LastMethodSuccess() != true) {
    print $jwt->lastErrorText() . "\n";
    exit;
}

// Here is the JWT:
print $jwtStr . "\n";

?>