Sign a JWS with a Private Key

See more JSON Web Signatures (JWS) Examples

Demonstrates Jws.SetPrivateKey, which sets the private key used to create a signature. The example uses RS256 (RSASSA-PKCS1-v1_5 with SHA-256).

The file path is relative to the application's current working directory. An absolute path may also be used. Supply the path appropriate to your own environment.

<?php

use Chilkat2\JsonObject;
use Chilkat2\Jws;
use Chilkat2\PrivateKey;

$jws = new Jws();

// Protected header specifying RSASSA-PKCS1-v1_5 with SHA-256 (RS256).
$header = new JsonObject();
$header->UpdateString('alg', 'RS256');
try {
    $jws->SetProtectedHeader(0, $header);

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

    // The file path is relative to the application's current working directory.  An absolute path
    // may also be used.  Supply the path appropriate to your own environment.
    // Load the signer's private key and set it for signature 0.
    $privKey = new PrivateKey();
    $privKey->LoadPemFile('qa_data/signer_privkey.pem');

    $jws->SetPrivateKey(0, $privKey);

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

echo $jwsCompact, "\n";