59 lines
1.6 KiB
PHP
59 lines
1.6 KiB
PHP
<?php
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declare(strict_types=1);
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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($key->toPublic());
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return openssl_verify($input, $signature, $pub->toPEM(), $this->getAlgorithm()) === 1;
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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(), $this->getAlgorithm());
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if ($result !== true) {
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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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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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