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

include("chilkat.php");

$success = false;

$jws = new CkJws();

//  Protected header specifying HMAC-SHA256.
$header = new CkJsonObject();
$header->UpdateString('alg','HS256');
$success = $jws->SetProtectedHeader(0,$header);
if ($success == false) {
    print $jws->lastErrorText() . "\n";
    exit;
}

$bIncludeBom = false;
$success = $jws->SetPayload('This is the content to sign.','utf-8',$bIncludeBom);
if ($success == false) {
    print $jws->lastErrorText() . "\n";
    exit;
}

//  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 CkBinData();
$bdKey->AppendEncoded('YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4eXowMTIzNDU=','base64');
$success = $jws->SetMacKeyBd(0,$bdKey);
if ($success == false) {
    print $jws->lastErrorText() . "\n";
    exit;
}

$jwsCompact = $jws->createJws();
if ($jws->get_LastMethodSuccess() == false) {
    print $jws->lastErrorText() . "\n";
    exit;
}

print $jwsCompact . "\n";

?>