97 lines
3.8 KiB
PHP
97 lines
3.8 KiB
PHP
<?php
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$connection = '';
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if (!$drivers) {
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page_header(lang('No extension'), lang('None of the supported PHP extensions (%s) are available.', implode(", ", $possible_drivers)), null);
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page_footer("auth");
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exit;
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}
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$token = $_SESSION["token"];
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if (!$_SESSION["token"]) {
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$_SESSION["token"] = rand(1, 1e6); // defense against cross-site request forgery
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}
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if (isset($_POST["server"])) {
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session_regenerate_id(); // defense against session fixation
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$_SESSION["passwords"][$_POST["driver"]][$_POST["server"]][$_POST["username"]] = $_POST["password"];
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if ($_POST["permanent"]) {
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cookie("adminer_permanent", //! store separately for each driver, server and username to allow several permanent logins
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base64_encode($_POST["server"])
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. ":" . base64_encode($_POST["username"])
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. ":" . base64_encode(encrypt_string($_POST["password"], $adminer->permanentLogin()))
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. ":" . base64_encode($_POST["driver"])
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);
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}
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if (count($_POST) == ($_POST["permanent"] ? 5 : 4) // 4 - driver, server, username, password
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|| DRIVER != $_POST["driver"]
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|| SERVER != $_POST["server"]
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|| $_GET["username"] !== $_POST["username"] // "0" == "00"
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) {
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redirect(auth_url($_POST["driver"], $_POST["server"], $_POST["username"]));
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}
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} elseif ($_POST["logout"]) {
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if ($token && $_POST["token"] != $token) {
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page_header(lang('Logout'), lang('Invalid CSRF token. Send the form again.'));
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page_footer("db");
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exit;
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} else {
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foreach (array("passwords", "databases", "history") as $key) {
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set_session($key, null);
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}
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cookie("adminer_permanent", "");
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redirect(substr(preg_replace('~(username|db|ns)=[^&]*&~', '', ME), 0, -1), lang('Logout successful.'));
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}
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} elseif ($_COOKIE["adminer_permanent"]) {
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list($server, $username, $cipher, $system) = array_map('base64_decode', explode(":", $_COOKIE["adminer_permanent"])); // $driver is a global variable
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if ($server == SERVER && $username === $_GET["username"] && $system == DRIVER) {
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session_regenerate_id(); // defense against session fixation
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set_session("passwords", decrypt_string($cipher, $adminer->permanentLogin()));
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}
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//! redirect ?select=tab
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}
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function auth_error($exception = null) {
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global $connection, $adminer, $token;
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$session_name = session_name();
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$error = "";
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if (!$_COOKIE[$session_name] && $_GET[$session_name] && ini_bool("session.use_only_cookies")) {
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$error = lang('Session support must be enabled.');
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} elseif (isset($_GET["username"])) {
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if (($_COOKIE[$session_name] || $_GET[$session_name]) && !$token) {
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$error = lang('Session expired, please login again.');
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} else {
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$password = &get_session("passwords");
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if (isset($password)) {
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$error = h($exception ? $exception->getMessage() : (is_string($connection) ? $connection : lang('Invalid credentials.')));
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$password = null;
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}
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}
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}
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page_header(lang('Login'), $error, null);
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echo "<form action='' method='post'>\n";
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$adminer->loginForm();
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echo "<div>";
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hidden_fields($_POST, array("driver", "server", "username", "password", "permanent")); // expired session
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echo "</div>\n";
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echo "</form>\n";
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page_footer("auth");
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}
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if (isset($_GET["username"]) && class_exists("Min_DB")) { // doesn't exists with passing wrong driver
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$connection = connect();
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}
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if (is_string($connection) || !$adminer->login($_GET["username"], get_session("passwords"))) {
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auth_error();
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exit;
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}
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$token = $_SESSION["token"]; ///< @var string CSRF protection
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if (isset($_POST["server"]) && $_POST["token"]) {
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$_POST["token"] = $token; // reset token after explicit login
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}
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$error = ($_POST ///< @var string
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? ($_POST["token"] == $token ? "" : lang('Invalid CSRF token. Send the form again.'))
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: ($_SERVER["REQUEST_METHOD"] != "POST" ? "" : lang('Too big POST data. Reduce the data or increase the %s configuration directive.', '"post_max_size"')) // posted form with no data means that post_max_size exceeded because Adminer always sends token at least
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);
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