Sign a JWS with an HMAC Key from BinData

See more JSON Web Signatures (JWS) Examples

Demonstrates Jws.SetMacKeyBd, which sets the symmetric MAC key for a signature from the raw bytes in a BinData.

<?php

use Chilkat2\BinData;
use Chilkat2\JsonObject;
use Chilkat2\Jws;

$jws = new Jws();

// Protected header specifying HMAC-SHA256.
$header = new JsonObject();
$header->UpdateString('alg', 'HS256');
try {
    $jws->SetProtectedHeader(0, $header);

    $bIncludeBom = false;
    $jws->SetPayload('This is the content to sign.', 'utf-8', $bIncludeBom);

    // Set the symmetric MAC key for signature 0 from the raw bytes in a BinData.  In production, obtain
    // the key material from a secure source.
    $bdKey = new BinData();
    $bdKey->AppendEncoded('YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4eXowMTIzNDU=', 'base64');
    $jws->SetMacKeyBd(0, $bdKey);

    $jwsCompact = $jws->CreateJws();
} catch (\Chilkat2\Exception $e) {
    echo $e->getMessage(), "\n";
    exit;
}

echo $jwsCompact, "\n";