76 lines
2.0 KiB
PHP
76 lines
2.0 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\Algorithm;
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use function in_array;
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use InvalidArgumentException;
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use Jose\Component\Core\JWK;
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use Jose\Component\Core\Util\RSAKey;
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use RuntimeException;
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abstract class RSAPKCS1 implements SignatureAlgorithm
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{
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public function allowedKeyTypes(): array
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{
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return ['RSA'];
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}
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public function verify(JWK $key, string $input, string $signature): bool
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{
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$this->checkKey($key);
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$pub = RSAKey::createFromJWK($key->toPublic());
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return 1 === openssl_verify($input, $signature, $pub->toPEM(), $this->getAlgorithm());
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}
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/**
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* @throws InvalidArgumentException if the key is not private
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* @throws InvalidArgumentException if the data cannot be signed
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*/
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public function sign(JWK $key, string $input): string
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{
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$this->checkKey($key);
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if (!$key->has('d')) {
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throw new InvalidArgumentException('The key is not a private key.');
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}
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$priv = RSAKey::createFromJWK($key);
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$result = openssl_sign($input, $signature, $priv->toPEM(), $this->getAlgorithm());
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if (true !== $result) {
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throw new RuntimeException('Unable to sign');
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}
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return $signature;
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}
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abstract protected function getAlgorithm(): string;
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/**
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* @throws InvalidArgumentException if the key type is not allowed
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* @throws InvalidArgumentException if the key is not valid
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*/
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private function checkKey(JWK $key): void
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{
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if (!in_array($key->get('kty'), $this->allowedKeyTypes(), true)) {
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throw new InvalidArgumentException('Wrong key type.');
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}
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foreach (['n', 'e'] as $k) {
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if (!$key->has($k)) {
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throw new InvalidArgumentException(sprintf('The key parameter "%s" is missing.', $k));
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}
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}
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}
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}
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