98 lines
3.0 KiB
PHP
98 lines
3.0 KiB
PHP
<?php
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declare(strict_types=1);
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namespace Jose\Component\Signature\Serializer;
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use InvalidArgumentException;
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use Jose\Component\Core\Util\Base64UrlSafe;
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use Jose\Component\Core\Util\JsonConverter;
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use Jose\Component\Signature\JWS;
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use function count;
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use function is_array;
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final class JSONFlattenedSerializer extends Serializer
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{
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public const NAME = 'jws_json_flattened';
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public function displayName(): string
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{
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return 'JWS JSON Flattened';
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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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public function serialize(JWS $jws, ?int $signatureIndex = null): string
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{
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if ($signatureIndex === null) {
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$signatureIndex = 0;
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}
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$signature = $jws->getSignature($signatureIndex);
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$data = [];
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$encodedPayload = $jws->getEncodedPayload();
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if ($encodedPayload !== null && $encodedPayload !== '') {
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$data['payload'] = $encodedPayload;
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}
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$encodedProtectedHeader = $signature->getEncodedProtectedHeader();
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if ($encodedProtectedHeader !== null && $encodedProtectedHeader !== '') {
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$data['protected'] = $encodedProtectedHeader;
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}
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$header = $signature->getHeader();
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if (count($header) !== 0) {
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$data['header'] = $header;
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}
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$data['signature'] = Base64UrlSafe::encodeUnpadded($signature->getSignature());
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return JsonConverter::encode($data);
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}
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public function unserialize(string $input): JWS
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{
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$data = JsonConverter::decode($input);
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if (! is_array($data)) {
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throw new InvalidArgumentException('Unsupported input.');
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}
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if (! isset($data['signature'])) {
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throw new InvalidArgumentException('Unsupported input.');
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}
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$signature = Base64UrlSafe::decodeNoPadding($data['signature']);
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if (isset($data['protected'])) {
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$encodedProtectedHeader = $data['protected'];
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$protectedHeader = JsonConverter::decode(Base64UrlSafe::decodeNoPadding($data['protected']));
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if (! is_array($protectedHeader)) {
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throw new InvalidArgumentException('Bad protected header.');
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}
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} else {
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$encodedProtectedHeader = null;
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$protectedHeader = [];
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}
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if (isset($data['header'])) {
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if (! is_array($data['header'])) {
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throw new InvalidArgumentException('Bad header.');
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}
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$header = $data['header'];
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} else {
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$header = [];
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}
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if (isset($data['payload'])) {
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$encodedPayload = $data['payload'];
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$payload = $this->isPayloadEncoded($protectedHeader) ? Base64UrlSafe::decodeNoPadding(
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$encodedPayload
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) : $encodedPayload;
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} else {
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$payload = null;
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$encodedPayload = null;
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}
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$jws = new JWS($payload, $encodedPayload, $encodedPayload === null);
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return $jws->addSignature($signature, $protectedHeader, $encodedProtectedHeader, $header);
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}
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}
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