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<?php |
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/* |
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* This file is part of the Symfony package. |
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* |
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* (c) Fabien Potencier <[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 Symfony\Component\HttpKernel; |
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/** |
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* Signs URIs. |
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* |
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* @author Fabien Potencier <[email protected]> |
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*/ |
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class UriSigner |
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{ |
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private $secret; |
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/** |
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* Constructor. |
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* |
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* @param string $secret A secret |
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*/ |
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public function __construct($secret) |
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{ |
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$this->secret = $secret; |
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} |
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/** |
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* Signs a URI. |
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* |
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* The given URI is signed by adding a _hash query string parameter |
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* which value depends on the URI and the secret. |
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* |
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* @param string $uri A URI to sign |
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* |
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* @return string The signed URI |
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*/ |
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public function sign($uri) |
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{ |
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$url = parse_url($uri); |
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if (isset($url['query'])) { |
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parse_str($url['query'], $params); |
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} else { |
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$params = array(); |
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} |
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$uri = $this->buildUrl($url, $params); |
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return $uri.(false === strpos($uri, '?') ? '?' : '&').'_hash='.$this->computeHash($uri); |
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} |
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/** |
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* Checks that a URI contains the correct hash. |
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* |
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* The _hash query string parameter must be the last one |
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* (as it is generated that way by the sign() method, it should |
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* never be a problem). |
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* |
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* @param string $uri A signed URI |
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* |
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* @return bool True if the URI is signed correctly, false otherwise |
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*/ |
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public function check($uri) |
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{ |
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$url = parse_url($uri); |
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if (isset($url['query'])) { |
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parse_str($url['query'], $params); |
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} else { |
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$params = array(); |
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} |
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if (empty($params['_hash'])) { |
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return false; |
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} |
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$hash = urlencode($params['_hash']); |
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unset($params['_hash']); |
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return $this->computeHash($this->buildUrl($url, $params)) === $hash; |
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} |
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private function computeHash($uri) |
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{ |
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return urlencode(base64_encode(hash_hmac('sha256', $uri, $this->secret, true))); |
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} |
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private function buildUrl(array $url, array $params = array()) |
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{ |
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ksort($params, SORT_STRING); |
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$url['query'] = http_build_query($params, '', '&'); |
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$scheme = isset($url['scheme']) ? $url['scheme'].'://' : ''; |
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$host = isset($url['host']) ? $url['host'] : ''; |
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$port = isset($url['port']) ? ':'.$url['port'] : ''; |
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$user = isset($url['user']) ? $url['user'] : ''; |
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$pass = isset($url['pass']) ? ':'.$url['pass'] : ''; |
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$pass = ($user || $pass) ? "$pass@" : ''; |
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$path = isset($url['path']) ? $url['path'] : ''; |
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$query = isset($url['query']) && $url['query'] ? '?'.$url['query'] : ''; |
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$fragment = isset($url['fragment']) ? '#'.$url['fragment'] : ''; |
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return $scheme.$user.$pass.$host.$port.$path.$query.$fragment; |
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} |
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} |
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itstructure /
yii2-template-simple
