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Edit File : UriSigner.php \| Size : 2.89 KB
<?php /* * This file is part of the Symfony package. * * (c) Fabien Potencier <fabien@symfony.com> * * For the full copyright and license information, please view the LICENSE * file that was distributed with this source code. / namespace Symfony\Component\HttpKernel; /* * Signs URIs. * * @author Fabien Potencier <fabien@symfony.com> / class UriSigner { private $secret; private $parameter; /* * @param string $secret A secret * @param string $parameter Query string parameter to use / public function __construct(string $secret, string $parameter = '_hash') { $this->secret = $secret; $this->parameter = $parameter; } /* * Signs a URI. * * The given URI is signed by adding the query string parameter * which value depends on the URI and the secret. * * @param string $uri A URI to sign * * @return string The signed URI / public function sign($uri) { $url = parse_url($uri); if (isset($url['query'])) { parse_str($url['query'], $params); } else { $params = []; } $uri = $this->buildUrl($url, $params); $params[$this->parameter] = $this->computeHash($uri); return $this->buildUrl($url, $params); } /* * Checks that a URI contains the correct hash. * * @param string $uri A signed URI * * @return bool True if the URI is signed correctly, false otherwise */ public function check($uri) { $url = parse_url($uri); if (isset($url['query'])) { parse_str($url['query'], $params); } else { $params = []; } if (empty($params[$this->parameter])) { return false; } $hash = $params[$this->parameter]; unset($params[$this->parameter]); return hash_equals($this->computeHash($this->buildUrl($url, $params)), $hash); } private function computeHash(string $uri): string { return base64_encode(hash_hmac('sha256', $uri, $this->secret, true)); } private function buildUrl(array $url, array $params = []): string { ksort($params, SORT_STRING); $url['query'] = http_build_query($params, '', '&'); $scheme = isset($url['scheme']) ? $url['scheme'].'://' : ''; $host = isset($url['host']) ? $url['host'] : ''; $port = isset($url['port']) ? ':'.$url['port'] : ''; $user = isset($url['user']) ? $url['user'] : ''; $pass = isset($url['pass']) ? ':'.$url['pass'] : ''; $pass = ($user \|\| $pass) ? "$pass@" : ''; $path = isset($url['path']) ? $url['path'] : ''; $query = isset($url['query']) && $url['query'] ? '?'.$url['query'] : ''; $fragment = isset($url['fragment']) ? '#'.$url['fragment'] : ''; return $scheme.$user.$pass.$host.$port.$path.$query.$fragment; } } Back

Edit File : UriSigner.php | Size : 2.89 KB

<?php

/*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier <fabien@symfony.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Symfony\Component\HttpKernel;

/**
 * Signs URIs.
 *
 * @author Fabien Potencier <fabien@symfony.com>
 */
class UriSigner
{
    private $secret;
    private $parameter;

/**
     * @param string $secret    A secret
     * @param string $parameter Query string parameter to use
     */
    public function __construct(string $secret, string $parameter = '_hash')
    {
        $this->secret = $secret;
        $this->parameter = $parameter;
    }

/**
     * Signs a URI.
     *
     * The given URI is signed by adding the query string parameter
     * which value depends on the URI and the secret.
     *
     * @param string $uri A URI to sign
     *
     * @return string The signed URI
     */
    public function sign($uri)
    {
        $url = parse_url($uri);
        if (isset($url['query'])) {
            parse_str($url['query'], $params);
        } else {
            $params = [];
        }

$uri = $this->buildUrl($url, $params);
        $params[$this->parameter] = $this->computeHash($uri);

return $this->buildUrl($url, $params);
    }

/**
     * Checks that a URI contains the correct hash.
     *
     * @param string $uri A signed URI
     *
     * @return bool True if the URI is signed correctly, false otherwise
     */
    public function check($uri)
    {
        $url = parse_url($uri);
        if (isset($url['query'])) {
            parse_str($url['query'], $params);
        } else {
            $params = [];
        }

if (empty($params[$this->parameter])) {
            return false;
        }

$hash = $params[$this->parameter];
        unset($params[$this->parameter]);

return hash_equals($this->computeHash($this->buildUrl($url, $params)), $hash);
    }

private function computeHash(string $uri): string
    {
        return base64_encode(hash_hmac('sha256', $uri, $this->secret, true));
    }

private function buildUrl(array $url, array $params = []): string
    {
        ksort($params, SORT_STRING);
        $url['query'] = http_build_query($params, '', '&');

$scheme = isset($url['scheme']) ? $url['scheme'].'://' : '';
        $host = isset($url['host']) ? $url['host'] : '';
        $port = isset($url['port']) ? ':'.$url['port'] : '';
        $user = isset($url['user']) ? $url['user'] : '';
        $pass = isset($url['pass']) ? ':'.$url['pass'] : '';
        $pass = ($user || $pass) ? "$pass@" : '';
        $path = isset($url['path']) ? $url['path'] : '';
        $query = isset($url['query']) && $url['query'] ? '?'.$url['query'] : '';
        $fragment = isset($url['fragment']) ? '#'.$url['fragment'] : '';

return $scheme.$user.$pass.$host.$port.$path.$query.$fragment;
    }
}

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