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<?php |
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namespace Emarref\Jwt\Algorithm; |
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abstract class RsaSsaPkcs implements AsymmetricInterface |
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{ |
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public function __construct() |
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{ |
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$this->ensureSupport(); |
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} |
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/** |
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* @throws \RuntimeException |
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*/ |
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public function ensureSupport() |
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{ |
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if (!function_exists('openssl_sign')) { |
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throw new \RuntimeException('Openssl is required to use RSA encryption.'); |
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} |
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$supportedAlgorithms = openssl_get_md_methods(true); |
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if (!in_array($this->getAlgorithm(), $supportedAlgorithms)) { |
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throw new \RuntimeException('Algorithm "%s" is not supported on this system.', $this->getAlgorithm()); |
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} |
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} |
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/** |
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* @return array |
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*/ |
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private function getSslErrors() |
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{ |
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$messages = []; |
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while ($msg = openssl_error_string()) { |
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$messages[] = $msg; |
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} |
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return $messages; |
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} |
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/** |
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* @param string $value |
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* @param string|resource $privateKey |
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* @return string |
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*/ |
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View Code Duplication |
public function sign($value, $privateKey) |
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{ |
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$result = openssl_sign($value, $signature, $privateKey, $this->getAlgorithm()); |
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if (false === $result) { |
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throw new \RuntimeException('Failed to encrypt value. ' . implode("\n", $this->getSslErrors())); |
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} |
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return $signature; |
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} |
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/** |
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* @param string $value |
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* @param string $signature |
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* @param string|resource $publicKey |
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* @return boolean |
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*/ |
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View Code Duplication |
public function verify($value, $signature, $publicKey) |
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{ |
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$result = openssl_verify($value, $signature, $publicKey, $this->getAlgorithm()); |
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if ($result === -1) { |
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throw new \RuntimeException('Failed to verify signature. ' . implode("\n", $this->getSslErrors())); |
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} |
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return (boolean)$result; |
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} |
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/** |
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* @return integer |
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*/ |
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abstract protected function getAlgorithm(); |
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} |
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emarref /
jwt
