primo commit

libraries/vendor/web-token/jwt-library/Signature/Serializer/JSONGeneralSerializer.php

@@ -0,0 +1,160 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Jose\Component\Signature\Serializer;
+
+use InvalidArgumentException;
+use Jose\Component\Core\Util\Base64UrlSafe;
+use Jose\Component\Core\Util\JsonConverter;
+use Jose\Component\Signature\JWS;
+use LogicException;
+use function array_key_exists;
+use function count;
+use function is_array;
+use function is_string;
+
+final class JSONGeneralSerializer extends Serializer
+{
+    public const NAME = 'jws_json_general';
+
+    public function displayName(): string
+    {
+        return 'JWS JSON General';
+    }
+
+    public function name(): string
+    {
+        return self::NAME;
+    }
+
+    public function serialize(JWS $jws, ?int $signatureIndex = null): string
+    {
+        if ($jws->countSignatures() === 0) {
+            throw new LogicException('No signature.');
+        }
+
+        $data = [];
+        $this->checkPayloadEncoding($jws);
+
+        if ($jws->isPayloadDetached() === false) {
+            $data['payload'] = $jws->getEncodedPayload();
+        }
+
+        $data['signatures'] = [];
+        foreach ($jws->getSignatures() as $signature) {
+            $tmp = [
+                'signature' => Base64UrlSafe::encodeUnpadded($signature->getSignature()),
+            ];
+            $values = [
+                'protected' => $signature->getEncodedProtectedHeader(),
+                'header' => $signature->getHeader(),
+            ];
+
+            foreach ($values as $key => $value) {
+                if ((is_string($value) && $value !== '') || (is_array($value) && count($value) !== 0)) {
+                    $tmp[$key] = $value;
+                }
+            }
+            $data['signatures'][] = $tmp;
+        }
+
+        return JsonConverter::encode($data);
+    }
+
+    public function unserialize(string $input): JWS
+    {
+        $data = JsonConverter::decode($input);
+        if (! is_array($data)) {
+            throw new InvalidArgumentException('Unsupported input.');
+        }
+        if (! isset($data['signatures'])) {
+            throw new InvalidArgumentException('Unsupported input.');
+        }
+
+        $isPayloadEncoded = null;
+        $rawPayload = $data['payload'] ?? null;
+        $signatures = [];
+        foreach ($data['signatures'] as $signature) {
+            if (! isset($signature['signature'])) {
+                throw new InvalidArgumentException('Unsupported input.');
+            }
+            [$encodedProtectedHeader, $protectedHeader, $header] = $this->processHeaders($signature);
+            $signatures[] = [
+                'signature' => Base64UrlSafe::decodeNoPadding($signature['signature']),
+                'protected' => $protectedHeader,
+                'encoded_protected' => $encodedProtectedHeader,
+                'header' => $header,
+            ];
+            $isPayloadEncoded = $this->processIsPayloadEncoded($isPayloadEncoded, $protectedHeader);
+        }
+
+        $payload = $this->processPayload($rawPayload, $isPayloadEncoded);
+        $jws = new JWS($payload, $rawPayload);
+        foreach ($signatures as $signature) {
+            $jws = $jws->addSignature(
+                $signature['signature'],
+                $signature['protected'],
+                $signature['encoded_protected'],
+                $signature['header']
+            );
+        }
+
+        return $jws;
+    }
+
+    /**
+     * @param array<string, mixed> $protectedHeader
+     */
+    private function processIsPayloadEncoded(?bool $isPayloadEncoded, array $protectedHeader): bool
+    {
+        if ($isPayloadEncoded === null) {
+            return $this->isPayloadEncoded($protectedHeader);
+        }
+        if ($this->isPayloadEncoded($protectedHeader) !== $isPayloadEncoded) {
+            throw new InvalidArgumentException('Foreign payload encoding detected.');
+        }
+
+        return $isPayloadEncoded;
+    }
+
+    /**
+     * @param array{protected?: string, header?: array<string, mixed>} $signature
+     * @return array<mixed>
+     */
+    private function processHeaders(array $signature): array
+    {
+        $encodedProtectedHeader = $signature['protected'] ?? null;
+        $protectedHeader = $encodedProtectedHeader === null ? [] : JsonConverter::decode(
+            Base64UrlSafe::decodeNoPadding($encodedProtectedHeader)
+        );
+        $header = array_key_exists('header', $signature) ? $signature['header'] : [];
+
+        return [$encodedProtectedHeader, $protectedHeader, $header];
+    }
+
+    private function processPayload(?string $rawPayload, ?bool $isPayloadEncoded): ?string
+    {
+        if ($rawPayload === null) {
+            return null;
+        }
+
+        return $isPayloadEncoded === false ? $rawPayload : Base64UrlSafe::decodeNoPadding($rawPayload);
+    }
+
+    private function checkPayloadEncoding(JWS $jws): void
+    {
+        if ($jws->isPayloadDetached()) {
+            return;
+        }
+        $is_encoded = null;
+        foreach ($jws->getSignatures() as $signature) {
+            if ($is_encoded === null) {
+                $is_encoded = $this->isPayloadEncoded($signature->getProtectedHeader());
+            }
+            if ($is_encoded !== $this->isPayloadEncoded($signature->getProtectedHeader())) {
+                throw new LogicException('Foreign payload encoding detected.');
+            }
+        }
+    }
+}