--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/vendor/symfony/src/Symfony/Component/Security/Http/EntryPoint/DigestAuthenticationEntryPoint.php	Sat Sep 24 15:40:41 2011 +0200
@@ -0,0 +1,64 @@
+<?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\Security\Http\EntryPoint;
+
+use Symfony\Component\Security\Core\Exception\AuthenticationException;
+use Symfony\Component\Security\Http\EntryPoint\AuthenticationEntryPointInterface;
+use Symfony\Component\Security\Core\Exception\NonceExpiredException;
+use Symfony\Component\HttpFoundation\Response;
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\HttpKernel\Log\LoggerInterface;
+
+/**
+ * DigestAuthenticationEntryPoint starts an HTTP Digest authentication.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class DigestAuthenticationEntryPoint implements AuthenticationEntryPointInterface
+{
+    private $key;
+    private $realmName;
+    private $nonceValiditySeconds;
+    private $logger;
+
+    public function __construct($realmName, $key, $nonceValiditySeconds = 300, LoggerInterface $logger = null)
+    {
+        $this->realmName = $realmName;
+        $this->key = $key;
+        $this->nonceValiditySeconds = $nonceValiditySeconds;
+        $this->logger = $logger;
+    }
+
+    public function start(Request $request, AuthenticationException $authException = null)
+    {
+        $expiryTime = microtime(true) + $this->nonceValiditySeconds * 1000;
+        $signatureValue = md5($expiryTime.':'.$this->key);
+        $nonceValue = $expiryTime.':'.$signatureValue;
+        $nonceValueBase64 = base64_encode($nonceValue);
+
+        $authenticateHeader = sprintf('Digest realm="%s", qop="auth", nonce="%s"', $this->realmName, $nonceValueBase64);
+
+        if ($authException instanceof NonceExpiredException) {
+            $authenticateHeader = $authenticateHeader.', stale="true"';
+        }
+
+        if (null !== $this->logger) {
+            $this->logger->debug(sprintf('WWW-Authenticate header sent to user agent: "%s"', $authenticateHeader));
+        }
+
+        $response = new Response();
+        $response->headers->set('WWW-Authenticate', $authenticateHeader);
+        $response->setStatusCode(401, $authException ? $authException->getMessage() : null);
+
+        return $response;
+    }
+}