97 lines
3.1 KiB
PHP
97 lines
3.1 KiB
PHP
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<?php
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declare(strict_types=1);
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/*
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* The MIT License (MIT)
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*
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* Copyright (c) 2014-2020 Spomky-Labs
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*
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* This software may be modified and distributed under the terms
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* of the MIT license. See the LICENSE file for details.
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*/
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namespace Jose\Component\Signature\Serializer;
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use Base64Url\Base64Url;
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use function count;
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use InvalidArgumentException;
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use Jose\Component\Core\Util\JsonConverter;
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use Jose\Component\Signature\JWS;
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use LogicException;
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use Throwable;
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final class CompactSerializer extends Serializer
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{
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public const NAME = 'jws_compact';
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public function displayName(): string
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{
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return 'JWS Compact';
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}
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public function name(): string
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{
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return self::NAME;
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}
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/**
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* @throws LogicException if the JWS has unprotected header (invalid for compact JSON)
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* @throws LogicException if the payload is not encoded but contains unauthorized characters
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*/
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public function serialize(JWS $jws, ?int $signatureIndex = null): string
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{
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if (null === $signatureIndex) {
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$signatureIndex = 0;
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}
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$signature = $jws->getSignature($signatureIndex);
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if (0 !== count($signature->getHeader())) {
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throw new LogicException('The signature contains unprotected header parameters and cannot be converted into compact JSON.');
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}
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$isEmptyPayload = null === $jws->getEncodedPayload() || '' === $jws->getEncodedPayload();
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if (!$this->isPayloadEncoded($signature->getProtectedHeader()) && !$isEmptyPayload) {
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if (1 !== preg_match('/^[\x{20}-\x{2d}|\x{2f}-\x{7e}]*$/u', $jws->getPayload())) {
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throw new LogicException('Unable to convert the JWS with non-encoded payload.');
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}
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}
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return sprintf(
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'%s.%s.%s',
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$signature->getEncodedProtectedHeader(),
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$jws->getEncodedPayload(),
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Base64Url::encode($signature->getSignature())
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);
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}
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/**
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* @throws InvalidArgumentException if the input is invalid
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*/
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public function unserialize(string $input): JWS
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{
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$parts = explode('.', $input);
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if (3 !== count($parts)) {
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throw new InvalidArgumentException('Unsupported input');
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}
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try {
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$encodedProtectedHeader = $parts[0];
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$protectedHeader = JsonConverter::decode(Base64Url::decode($parts[0]));
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$hasPayload = '' !== $parts[1];
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if (!$hasPayload) {
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$payload = null;
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$encodedPayload = null;
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} else {
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$encodedPayload = $parts[1];
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$payload = $this->isPayloadEncoded($protectedHeader) ? Base64Url::decode($encodedPayload) : $encodedPayload;
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}
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$signature = Base64Url::decode($parts[2]);
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$jws = new JWS($payload, $encodedPayload, !$hasPayload);
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return $jws->addSignature($signature, $protectedHeader, $encodedProtectedHeader);
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} catch (Throwable $throwable) {
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throw new InvalidArgumentException('Unsupported input', $throwable->getCode(), $throwable);
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}
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}
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}
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