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<?php |
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/* |
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* The MIT License (MIT) |
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* |
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* Copyright (c) 2014-2016 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\Algorithm\Signature; |
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use Assert\Assertion; |
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use Jose\Algorithm\SignatureAlgorithmInterface; |
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use Jose\KeyConverter\KeyConverter; |
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use Jose\Object\JWKInterface; |
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use phpseclib\Crypt\RSA as PHPSecLibRSA; |
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/** |
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* Class RSA. |
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*/ |
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abstract class RSA implements SignatureAlgorithmInterface |
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{ |
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/** |
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* @return mixed |
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*/ |
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abstract protected function getAlgorithm(); |
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/** |
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* @return mixed |
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*/ |
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abstract protected function getSignatureMethod(); |
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/** |
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* {@inheritdoc} |
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*/ |
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public function verify(JWKInterface $key, $input, $signature) |
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{ |
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$this->checkKey($key); |
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$values = array_intersect_key($key->getAll(), array_flip(['n', 'e'])); |
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$rsa = KeyConverter::fromArrayToRSACrypt($values); |
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$rsa->setHash($this->getAlgorithm()); |
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if ($this->getSignatureMethod() === PHPSecLibRSA::SIGNATURE_PSS) { |
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$rsa->setMGFHash($this->getAlgorithm()); |
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$rsa->setSaltLength(0); |
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} |
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$rsa->setSignatureMode($this->getSignatureMethod()); |
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return $rsa->verify($input, $signature); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function sign(JWKInterface $key, $input) |
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{ |
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$this->checkKey($key); |
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$values = array_intersect_key($key->getAll(), array_flip(['n', 'e', 'p', 'd', 'q', 'dp', 'dq', 'qi'])); |
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$rsa = KeyConverter::fromArrayToRSACrypt($values); |
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if ($rsa->getPrivateKey() === false) { |
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throw new \InvalidArgumentException('The key is not a private key'); |
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} |
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$rsa->setHash($this->getAlgorithm()); |
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if ($this->getSignatureMethod() === PHPSecLibRSA::SIGNATURE_PSS) { |
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$rsa->setMGFHash($this->getAlgorithm()); |
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$rsa->setSaltLength(0); |
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} |
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$rsa->setSignatureMode($this->getSignatureMethod()); |
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$result = $rsa->sign($input); |
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Assertion::string($result, 'An error occurred during the creation of the signature'); |
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return $result; |
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} |
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/** |
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* @param JWKInterface $key |
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*/ |
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protected function checkKey(JWKInterface $key) |
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{ |
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Assertion::eq($key->get('kty'), 'RSA', 'Wrong key type.'); |
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} |
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} |
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Spomky-Labs /
jose
