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<?php
declare(strict_types=1);
/*
* The MIT License (MIT)
*
* Copyright (c) 2014-2018 Spomky-Labs
*
* This software may be modified and distributed under the terms
* of the MIT license. See the LICENSE file for details.
*/
namespace Jose\Component\Signature\Serializer;
use Base64Url\Base64Url;
use Jose\Component\Core\Converter\JsonConverter;
use Jose\Component\Signature\JWS;
final class JSONFlattenedSerializer extends Serializer
{
public const NAME = 'jws_json_flattened';
/**
* @var JsonConverter|\Jose\Component\Core\Util\JsonConverter|null
*/
private $jsonConverter;
/**
* JSONFlattenedSerializer constructor.
*/
public function __construct(?JsonConverter $jsonConverter = null)
{
$this->jsonConverter = $jsonConverter ?? new \Jose\Component\Core\Util\JsonConverter();
}
public function displayName(): string
{
return 'JWS JSON Flattened';
}
public function name(): string
{
return self::NAME;
}
public function serialize(JWS $jws, ?int $signatureIndex = null): string
{
if (null === $signatureIndex) {
$signatureIndex = 0;
}
$signature = $jws->getSignature($signatureIndex);
$data = [];
$values = [
'payload' => $jws->getEncodedPayload(),
'protected' => $signature->getEncodedProtectedHeader(),
'header' => $signature->getHeader(),
];
foreach ($values as $key => $value) {
if (!empty($value)) {
$data[$key] = $value;
}
}
$data['signature'] = Base64Url::encode($signature->getSignature());
return $this->jsonConverter->encode($data);
}
public function unserialize(string $input): JWS
{
$data = $this->jsonConverter->decode($input);
if (!\is_array($data) || !\array_key_exists('signature', $data)) {
throw new \InvalidArgumentException('Unsupported input.');
}
$signature = Base64Url::decode($data['signature']);
if (\array_key_exists('protected', $data)) {
$encodedProtectedHeader = $data['protected'];
$protectedHeader = $this->jsonConverter->decode(Base64Url::decode($data['protected']));
} else {
$encodedProtectedHeader = null;
$protectedHeader = [];
}
if (\array_key_exists('header', $data)) {
if (!\is_array($data['header'])) {
throw new \InvalidArgumentException('Bad header.');
}
$header = $data['header'];
} else {
$header = [];
}
if (\array_key_exists('payload', $data)) {
$encodedPayload = $data['payload'];
$payload = $this->isPayloadEncoded($protectedHeader) ? Base64Url::decode($encodedPayload) : $encodedPayload;
} else {
$payload = null;
$encodedPayload = null;
}
$jws = JWS::create($payload, $encodedPayload, null === $encodedPayload);
$jws = $jws->addSignature($signature, $protectedHeader, $encodedProtectedHeader, $header);
return $jws;
}
}
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