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(PHP Extension) Create JWT using a Brainpool EC Key

See more JSON Web Token (JWT) Examples

Demonstrates how to create a JWT using an EC private key. This is for JOSE headers having an "alg" member with any of the following values:

  • BP160R1
  • BP192R1
  • BP224R1
  • BP256R1
  • BP320R1
  • BP384R1
  • BP512R1

This example also demonstrates how to include time constraints:

  • nbf: Not Before Time
  • exp: Expiration Time
  • iat: Issue At Time

Chilkat PHP Downloads

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

<?php

include("chilkat_9_5_0.php");

// Demonstrates how to create a JWT using a brainpool EC private key.

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

$privKey = new CkPrivateKey();

// Load a brainpool EC key.
$success = $privKey->LoadPemFile('c:/qa_data/pem/ec_brainpool_privKey.pem');
if ($success != true) {
    print $privKey->lastErrorText() . "\n";
    exit;
}

// You can examine the curve name of the key you just loaded by getting the private in XML format:
// <ECCKeyValue curve="CURVE_NAME">...</ECCKeyValue>
print $privKey->getXml() . "\n";

$jwt = new CkJwt();

// Build the JOSE header
$jose = new CkJsonObject();
// Use the brainpool curve name matching the private key you just loaded.
// Use "BP256R1", or "BP384R1", etc.   
$success = $jose->AppendString('alg','BP256R1');
$success = $jose->AppendString('typ','JWT');

// Now build the JWT claims (also known as the payload)
$claims = new CkJsonObject();
$success = $claims->AppendString('iss','http://example.org');
$success = $claims->AppendString('sub','John');
$success = $claims->AppendString('aud','http://example.com');

// Set the timestamp of when the JWT was created to now.
$curDateTime = $jwt->GenNumericDate(0);
$success = $claims->AddIntAt(-1,'iat',$curDateTime);

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

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

// Produce the smallest possible JWT:
$jwt->put_AutoCompact(true);

// Create the JWT token.  This is where the ECC signature is created.
$token = $jwt->createJwtPk($jose->emit(),$claims->emit(),$privKey);

print $token . "\n";

?>

 

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