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<?php |
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/* |
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* This file is part of the Guarded Authentication package. |
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* |
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* (c) Jafar Jabr <[email protected]> |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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namespace Jafar\Bundle\GuardedAuthenticationBundle\Api\JWTSigner\Signer\OpenSSL; |
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use InvalidArgumentException; |
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use Jafar\Bundle\GuardedAuthenticationBundle\Api\JWTSigner\Signer\SignerInterface; |
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use RuntimeException; |
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/** |
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* Class HS512. |
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* |
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* @author Jafar Jabr <[email protected]> |
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* Class handle sign inputs with the a public key algorithm, after hashing it. |
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*/ |
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abstract class PublicKey implements SignerInterface |
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{ |
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/** |
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* {@inheritdoc} |
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*/ |
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public function sign($input, $key, $password = null) |
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{ |
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$keyResource = $this->getKeyResource($key, $password); |
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if (!$this->supportsKey($keyResource)) { |
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throw new InvalidArgumentException('Invalid key supplied.'); |
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} |
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$signature = null; |
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openssl_sign($input, $signature, $keyResource, $this->getHashingAlgorithm()); |
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return $signature; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function verify($key, $signature, $input) |
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{ |
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$keyResource = $this->getKeyResource($key); |
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if (!$this->supportsKey($keyResource)) { |
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throw new InvalidArgumentException('Invalid key supplied.'); |
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} |
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$result = openssl_verify($input, $signature, $keyResource, $this->getHashingAlgorithm()); |
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if ($result === -1) { |
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throw new RuntimeException('Unknown error during verification.'); |
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} |
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return (bool) $result; |
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} |
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/** |
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* Converts a string representation of a key into an OpenSSL resource. |
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* |
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* @param string|resource $key |
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* @param string $password |
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* |
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* @return resource OpenSSL key resource |
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*/ |
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protected function getKeyResource($key, $password = null) |
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{ |
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if (is_resource($key)) { |
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return $key; |
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} |
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$resource = openssl_pkey_get_public($key) ?: openssl_pkey_get_private($key, $password); |
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if ($resource === false) { |
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throw new RuntimeException('Could not read key resource: ' . openssl_error_string()); |
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} |
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return $resource; |
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} |
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/** |
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* Check if the key is supported by this signer. |
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* |
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* @param resource $key Public or private key |
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* |
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* @return bool |
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*/ |
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protected function supportsKey($key) |
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{ |
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// OpenSSL 0.9.8+ |
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$keyDetails = openssl_pkey_get_details($key); |
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return isset($keyDetails['type']) ? $this->getSupportedPrivateKeyType() === $keyDetails['type'] : false; |
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} |
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/** |
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* Returns the hashing algorithm used in this signer. |
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* |
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* @return string |
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*/ |
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abstract protected function getHashingAlgorithm(); |
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/** |
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* Returns the private key type supported in this signer. |
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* |
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* @return string |
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*/ |
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abstract protected function getSupportedPrivateKeyType(); |
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} |
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jafaronly /
guarded-authentication-bundle
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