laipower/wp-content/plugins/wp-webauthn/wp-webauthn-vendor/web-token/jwt-signature/Serializer/CompactSerializer.php

97 lines
3.1 KiB
PHP

<?php
declare(strict_types=1);
/*
* The MIT License (MIT)
*
* Copyright (c) 2014-2020 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 function count;
use InvalidArgumentException;
use Jose\Component\Core\Util\JsonConverter;
use Jose\Component\Signature\JWS;
use LogicException;
use Throwable;
final class CompactSerializer extends Serializer
{
public const NAME = 'jws_compact';
public function displayName(): string
{
return 'JWS Compact';
}
public function name(): string
{
return self::NAME;
}
/**
* @throws LogicException if the JWS has unprotected header (invalid for compact JSON)
* @throws LogicException if the payload is not encoded but contains unauthorized characters
*/
public function serialize(JWS $jws, ?int $signatureIndex = null): string
{
if (null === $signatureIndex) {
$signatureIndex = 0;
}
$signature = $jws->getSignature($signatureIndex);
if (0 !== count($signature->getHeader())) {
throw new LogicException('The signature contains unprotected header parameters and cannot be converted into compact JSON.');
}
$isEmptyPayload = null === $jws->getEncodedPayload() || '' === $jws->getEncodedPayload();
if (!$this->isPayloadEncoded($signature->getProtectedHeader()) && !$isEmptyPayload) {
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())
);
}
/**
* @throws InvalidArgumentException if the input is invalid
*/
public function unserialize(string $input): JWS
{
$parts = explode('.', $input);
if (3 !== count($parts)) {
throw new InvalidArgumentException('Unsupported input');
}
try {
$encodedProtectedHeader = $parts[0];
$protectedHeader = JsonConverter::decode(Base64Url::decode($parts[0]));
$hasPayload = '' !== $parts[1];
if (!$hasPayload) {
$payload = null;
$encodedPayload = null;
} else {
$encodedPayload = $parts[1];
$payload = $this->isPayloadEncoded($protectedHeader) ? Base64Url::decode($encodedPayload) : $encodedPayload;
}
$signature = Base64Url::decode($parts[2]);
$jws = new JWS($payload, $encodedPayload, !$hasPayload);
return $jws->addSignature($signature, $protectedHeader, $encodedProtectedHeader);
} catch (Throwable $throwable) {
throw new InvalidArgumentException('Unsupported input', $throwable->getCode(), $throwable);
}
}
}