// Digest HTTP Authentication // To enable, add user: "name" => "password". //$users = array(); $users = array(""=>""); // If auth is enabled: if (!empty($users)) { if (empty($_SERVER['PHP_AUTH_DIGEST'])) { header('HTTP/1.1 401 Unauthorized'); header('WWW-Authenticate: Digest realm="' . $realm . '",qop="auth",nonce="' . uniqid() . '",opaque="' . md5($realm) . '"'); die("Bye-bye!\n"); } // Analyze the PHP_AUTH_DIGEST variable if (!($data = httpDigestParse($_SERVER['PHP_AUTH_DIGEST'])) || !isset($users[$data['username']])) { die("Wrong Credentials!\n"); } // Generate the valid response $A1 = md5($data['username'] . ':' . $realm . ':' . $users[$data['username']]); $A2 = md5($_SERVER['REQUEST_METHOD'] . ':' . $data['uri']); $valid_response = md5($A1 . ':' . $data['nonce'] . ':' . $data['nc'] . ':' . $data['cnonce'] . ':' . $data['qop'] . ':' . $A2); if ($data['response'] != $valid_response) { die("Wrong Credentials!\n"); } // ok, valid username & password $httpUsername = $data['username']; } function httpDigestParse($txt) { // protect against missing data $needed_parts = array('nonce' => 1, 'nc' => 1, 'cnonce' => 1, 'qop' => 1, 'username' => 1, 'uri' => 1, 'response' => 1); $data = array(); $keys = implode('|', array_keys($needed_parts)); preg_match_all('@(' . $keys . ')=(?:([\'"])([^\2]+?)\2|([^\s,]+))@', $txt, $matches, PREG_SET_ORDER); foreach ($matches as $m) { $data[$m[1]] = $m[3] ? $m[3] : $m[4]; unset($needed_parts[$m[1]]); } return $needed_parts ? false : $data; }
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