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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 CompactSerializer extends Serializer
{
public const NAME = 'jws_compact';
/**
* @var JsonConverter
*/
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 Compact';
}
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);
if (!empty($signature->getHeader())) {
throw new \LogicException('The signature contains unprotected header parameters and cannot be converted into compact JSON.');
}
if (!$this->isPayloadEncoded($signature->getProtectedHeader()) && !empty($jws->getEncodedPayload())) {
if (1 !== \preg_match('/^[\x{20}-\x{2d}|\x{2f}-\x{7e}]*$/u', $jws->getPayload())) {
throw new \LogicException('Unable to convert the JWS with non-encoded payload.');
}
}
return \sprintf(
'%s.%s.%s',
$signature->getEncodedProtectedHeader(),
$jws->getEncodedPayload(),
Base64Url::encode($signature->getSignature())
);
}
public function unserialize(string $input): JWS
{
$parts = \explode('.', $input);
if (3 !== \count($parts)) {
throw new \InvalidArgumentException('Unsupported input');
}
try {
$encodedProtectedHeader = $parts[0];
$protectedHeader = $this->jsonConverter->decode(Base64Url::decode($parts[0]));
if (empty($parts[1])) {
$payload = null;
$encodedPayload = null;
} else {
$encodedPayload = $parts[1];
$payload = $this->isPayloadEncoded($protectedHeader) ? Base64Url::decode($encodedPayload) : $encodedPayload;
}
$signature = Base64Url::decode($parts[2]);
$jws = JWS::create($payload, $encodedPayload, empty($parts[1]));
$jws = $jws->addSignature($signature, $protectedHeader, $encodedProtectedHeader);
return $jws;
} catch (\Error | \Exception $e) {
throw new \InvalidArgumentException('Unsupported input');
}
}
}
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