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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) 2014-2017 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 Jose\Component\Core\JWK; |
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use Jose\Component\Core\Util\ECSignature; |
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use Jose\Component\Core\Util\ECKey; |
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use Jose\Component\Signature\SignatureAlgorithmInterface; |
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/** |
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* Class ECDSA. |
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*/ |
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abstract class ECDSA implements SignatureAlgorithmInterface |
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{ |
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/** |
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* ECDSA constructor. |
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*/ |
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public function __construct() |
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{ |
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if (!defined('OPENSSL_KEYTYPE_EC')) { |
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throw new \RuntimeException('Elliptic Curve key type not supported by your environment.'); |
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} |
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} |
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/** |
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* {@inheritdoc} |
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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 EC key is not private'); |
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} |
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$pem = ECKey::convertPrivateKeyToPEM($key); |
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$result = openssl_sign($input, $signature, $pem, $this->getHashAlgorithm()); |
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if (false === $result) { |
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throw new \RuntimeException('Signature failed.'); |
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} |
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return ECSignature::fromDER($signature, $this->getSignaturePartLength()); |
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} |
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/** |
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* {@inheritdoc} |
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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($key); |
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try { |
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$der = ECSignature::toDER($signature, $this->getSignaturePartLength()); |
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$pem = ECKey::convertPublicKeyToPEM($key); |
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return 1 === openssl_verify($input, $der, $pem, $this->getHashAlgorithm()); |
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} catch (\Exception $e) { |
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return false; |
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} |
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} |
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/** |
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* @return string |
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*/ |
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abstract protected function getHashAlgorithm(): string; |
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/** |
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* @return int |
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*/ |
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abstract protected function getSignaturePartLength(): int; |
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/** |
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* @param JWK $key |
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*/ |
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private function checkKey(JWK $key) |
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{ |
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if ('EC' !== $key->get('kty')) { |
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throw new \InvalidArgumentException('Wrong key type.'); |
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} |
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foreach (['x', 'y', 'crv'] 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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Spomky-Labs /
jose
