| <?php |
| /* |
| * hores |
| * Copyright (c) 2023 Adrià Vilanova Martínez |
| * |
| * This program is free software: you can redistribute it and/or modify |
| * it under the terms of the GNU Affero General Public License as |
| * published by the Free Software Foundation, either version 3 of the |
| * License, or (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU Affero General Public License for more details. |
| * |
| * You should have received a copy of the GNU Affero General Public |
| * License along with this program. |
| * If not, see http://www.gnu.org/licenses/. |
| */ |
| |
| class security { |
| const HYPERADMIN = 0; |
| const ADMIN = 2; |
| /*const SYSTEM_REVIEWER = 5; |
| const LOG_REVIEWER = 7;*/ |
| const WORKER = 10; |
| const UNKNOWN = 1000; |
| |
| const METHOD_UNSPECIFICED = -1; |
| const METHOD_REDIRECT = 0; |
| const METHOD_NOTFOUND = 1; |
| |
| const PARAM_ISSET = 1; |
| const PARAM_NEMPTY = 2; |
| const PARAM_ISEMAIL = 4; |
| const PARAM_ISDATE = 8; |
| const PARAM_ISINT = 16; |
| const PARAM_ISTIME = 32; |
| const PARAM_ISARRAY = 64; |
| const PARAM_ISEMAILOREMPTY = 128; |
| |
| const SIGNIN_STATE_SIGNED_IN = 0; |
| const SIGNIN_STATE_NEEDS_SECOND_FACTOR = 1; |
| const SIGNIN_STATE_SIGNED_OUT = 2; |
| const SIGNIN_STATE_THROTTLED = 3; |
| |
| public static $types = [ |
| 10 => "Trabajador", |
| /*7 => "Revisor de logs", |
| 5 => "Revisor del sistema",*/ |
| 2 => "Administrador", |
| 0 => "Hiperadministrador" |
| ]; |
| |
| public static $automatedChecks = [self::PARAM_ISSET, self::PARAM_NEMPTY, self::PARAM_ISEMAIL, self::PARAM_ISDATE, self::PARAM_ISINT, self::PARAM_ISTIME, self::PARAM_ISARRAY, self::PARAM_ISEMAILOREMPTY]; |
| |
| public static $passwordHelperText = "La contraseña debe tener como mínimo 8 caracteres y una letra mayúscula."; |
| |
| public static function go($page) { |
| global $conf; |
| |
| if ($conf["superdebug"]) { |
| echo "Redirects are not enabled. We would like to redirect you here: <a href='".self::htmlsafe($page)."'>".self::htmlsafe($page)."</a>"; |
| } else { |
| header("Location: ".$page); |
| } |
| |
| exit(); |
| } |
| |
| public static function goHome() { |
| self::go("index.php"); |
| } |
| |
| public static function notFound() { |
| header('HTTP/1.0 404 Not Found'); |
| exit(); |
| } |
| |
| public static function isSignedIn() { |
| global $_SESSION; |
| |
| return isset($_SESSION["id"]); |
| } |
| |
| public static function check() { |
| if (!self::isSignedIn()) { |
| self::goHome(); |
| } |
| } |
| |
| public static function userType() { |
| global $_SESSION, $con; |
| |
| if (!isset($_SESSION["id"])) { |
| return self::UNKNOWN; |
| } |
| |
| $query = mysqli_query($con, "SELECT type FROM people WHERE id = ".(int)$_SESSION["id"]); |
| |
| if (!mysqli_num_rows($query)) { |
| return self::UNKNOWN; |
| } |
| |
| $row = mysqli_fetch_assoc($query); |
| |
| return $row["type"]; |
| } |
| |
| public static function isAllowed($type) { |
| $userType = (self::isSignedIn() ? self::userType() : self::UNKNOWN); |
| |
| return $userType <= $type; |
| } |
| |
| public static function denyUseMethod($method = self::METHOD_REDIRECT) { |
| if ($method === self::METHOD_NOTFOUND) { |
| self::notFound(); |
| } else { // self::METHOD_REDIRECT or anything else |
| self::goHome(); |
| } |
| } |
| |
| public static function checkType($type, $method = self::METHOD_REDIRECT) { |
| if (!self::isAllowed($type)) { |
| self::denyUseMethod($method); |
| } |
| } |
| |
| public static function checkWorkerUIEnabled() { |
| global $conf; |
| |
| if (self::userType() >= self::WORKER && !$conf["enableWorkerUI"]) { |
| self::go("index.php?msg=unsupported"); |
| } |
| } |
| |
| // Code from https://timoh6.github.io/2015/05/07/Rate-limiting-web-application-login-attempts.html |
| private static function getIpAddresses() { |
| $ips = []; |
| $ips["remoteIp"] = inet_pton($_SERVER['REMOTE_ADDR']); // inet_pton can handle both IPv4 and IPv6 addresses, treat IPv6 addresses as /64 or /56 blocks. |
| $ips["remoteIpBlock"] = long2ip(ip2long($_SERVER['REMOTE_ADDR']) & 0xFFFFFF00); // Something like this to turn the last octet of IPv4 address into a 0. |
| return $ips; |
| } |
| |
| public static function recordLoginAttempt($username) { |
| global $con; |
| |
| $susername = db::sanitize($username); |
| |
| $ips = self::getIpAddresses(); |
| $sremoteIp = db::sanitize($ips["remoteIp"]); |
| $sremoteIpBlock = db::sanitize($ips["remoteIpBlock"]); |
| |
| return mysqli_query($con, "INSERT INTO signinattempts (username, remoteip, remoteipblock, signinattempttime) VALUES ('$susername', '$sremoteIp', '$sremoteIpBlock', NOW())"); |
| } |
| |
| public static function getRateLimitingCounts($username) { |
| global $con, $conf; |
| |
| $susername = db::sanitize($username); |
| |
| $ips = self::getIpAddresses(); |
| $sremoteIp = db::sanitize($ips["remoteIp"]); |
| $sremoteIpBlock = db::sanitize($ips["remoteIpBlock"]); |
| |
| $query = mysqli_query($con, "SELECT |
| COUNT(*) AS global_attempt_count, |
| IFNULL(SUM(CASE WHEN remoteip = '$sremoteIp' THEN 1 ELSE 0 END), 0) AS ip_attempt_count, |
| IFNULL(SUM(CASE WHEN (remoteipblock = '$sremoteIpBlock') THEN 1 ELSE 0 END), 0) AS ip_block_attempt_count, |
| (SELECT COUNT(DISTINCT remoteipblock) FROM signinattempts WHERE username = '$susername' AND signinattempttime >= (NOW() - INTERVAL 10 SECOND )) AS ip_blocks_per_username_attempt_count, |
| (SELECT COUNT(*) FROM signinattempts WHERE username = '$susername' AND signinattempttime >= (NOW() - INTERVAL 10 SECOND )) AS username_attempt_count |
| FROM signinattempts |
| WHERE signinattempttime >= (NOW() - INTERVAL 10 second)"); |
| |
| if ($query === false) return false; |
| |
| return mysqli_fetch_assoc($query); |
| } |
| |
| public static function isSignInThrottled($username) { |
| global $conf; |
| |
| $count = self::getRateLimitingCounts($username); |
| |
| if ($count["global_attempt_count"] >= $conf["signinThrottling"]["attemptCountLimit"]["global"] || |
| $count["ip_attempt_count"] >= $conf["signinThrottling"]["attemptCountLimit"]["ip"] || |
| $count["ip_block_attempt_count"] >= $conf["signinThrottling"]["attemptCountLimit"]["ipBlock"] || |
| $count["ip_blocks_per_username_attempt_count"] >= $conf["signinThrottling"]["attemptCountLimit"]["ipBlocksPerUsername"] || |
| $count["username_attempt_count"] >= $conf["signinThrottling"]["attemptCountLimit"]["username"]) { |
| return true; |
| } |
| |
| if (!self::recordLoginAttempt($username)) { |
| echo "There was an unexpected error, so you could not be authenticated. Please contact me@avm99963.com and let them know of the error. (2)"; |
| exit(); |
| } |
| |
| return false; |
| } |
| |
| public static function isUserPassword($username, $password) { |
| global $con, $_SESSION; |
| |
| $susername = db::sanitize($username); |
| $query = mysqli_query($con, "SELECT id, password FROM people WHERE ".($username === false ? "id = ".(int)$_SESSION["id"] : "username = '".$susername."'")); |
| |
| if (!mysqli_num_rows($query)) { |
| return false; |
| } |
| |
| $row = mysqli_fetch_assoc($query); |
| |
| if (!password_verify($password, $row["password"])) { |
| return false; |
| } |
| |
| return $row["id"]; |
| } |
| |
| public static function signIn($username, $password) { |
| global $_SESSION; |
| |
| if (self::isSignInThrottled($username)) return self::SIGNIN_STATE_THROTTLED; |
| |
| $id = self::isUserPassword($username, $password); |
| |
| if ($id !== false) { |
| if (secondFactor::isEnabled($id)) { |
| $_SESSION["firstfactorid"] = $id; |
| return self::SIGNIN_STATE_NEEDS_SECOND_FACTOR; |
| } else { |
| $_SESSION["id"] = $id; |
| return self::SIGNIN_STATE_SIGNED_IN; |
| } |
| } |
| |
| return self::SIGNIN_STATE_SIGNED_OUT; |
| } |
| |
| public static function redirectAfterSignIn() { |
| global $conf; |
| |
| if (self::isAllowed(self::ADMIN)) { |
| self::changeActiveView(visual::VIEW_ADMIN); |
| self::go("home.php"); |
| } else { |
| self::changeActiveView(visual::VIEW_WORKER); |
| self::go(($conf["enableWorkerUI"] ? "workerhome.php" : "index.php?msg=unsupported")); |
| } |
| } |
| |
| public static function logout() { |
| global $_SESSION; |
| |
| session_destroy(); |
| } |
| |
| public static function htmlsafe($string) { |
| if ($string === null) return ''; |
| return htmlspecialchars((string)$string); |
| } |
| |
| private static function failedCheckParams($parameter, $method, $check) { |
| global $conf; |
| |
| if ($conf["superdebug"]) { |
| echo "Failed check ".(int)$check." using parameter '".self::htmlsafe($parameter)."' with method ".self::htmlsafe($method).".<br>"; |
| } |
| } |
| |
| public static function checkParam($param, $check) { |
| if ($check == self::PARAM_NEMPTY && empty($param)) { |
| return false; |
| } |
| |
| if ($check == self::PARAM_ISEMAIL && filter_var($param, FILTER_VALIDATE_EMAIL) === false) { |
| return false; |
| } |
| |
| if ($check == self::PARAM_ISDATE && preg_match("/^[0-9]+-[0-9]+-[0-9]+$/", $param) !== 1) { |
| return false; |
| } |
| |
| if ($check == self::PARAM_ISINT && filter_var($param, FILTER_VALIDATE_INT) === false) { |
| return false; |
| } |
| |
| if ($check == self::PARAM_ISTIME) { |
| if (preg_match("/^[0-9]+:[0-9]+$/", $param) !== 1) return false; |
| |
| $time = explode(":", $param); |
| if ((int)$time[0] >= 24 || (int)$time[1] >= 60) return false; |
| } |
| |
| if ($check == self::PARAM_ISARRAY) { |
| // Check whether the parameter is an array |
| if (is_array($param) === false) return false; |
| |
| // Check that it is not a multidimensional array (we don't want that for any parameter!) |
| foreach ($param as &$el) { |
| if (is_array($el)) return false; |
| } |
| } |
| |
| if ($check == self::PARAM_ISEMAILOREMPTY && $param !== "" && filter_var($param, FILTER_VALIDATE_EMAIL) === false) { |
| return false; |
| } |
| |
| return true; |
| } |
| |
| public static function checkParams($method, $parameters, $forceDisableDebug = false) { |
| global $_POST, $_GET; |
| |
| if (!in_array($method, ["GET", "POST"])) { |
| return false; |
| } |
| |
| foreach ($parameters as $p) { |
| if (!$p[1]) { |
| continue; |
| } |
| |
| if (($method == "POST" && !isset($_POST[$p[0]])) || ($method == "GET" && !isset($_GET[$p[0]]))) { |
| if (!$forceDisableDebug) self::failedCheckParams($p[0], $method, self::PARAM_ISSET); |
| return false; |
| } |
| |
| $value = ($method == "POST" ? $_POST[$p[0]] : $_GET[$p[0]]); |
| |
| foreach (self::$automatedChecks as $check) { |
| if (($p[1] & $check) && !self::checkParam($value, $check)) { |
| if (!$forceDisableDebug) self::failedCheckParams($p[0], $method, $check); |
| return false; |
| } |
| } |
| } |
| |
| return true; |
| } |
| |
| public static function existsType($type) { |
| $types = array_keys(self::$types); |
| |
| return in_array($type, $types); |
| } |
| |
| public static function getActiveView() { |
| global $_SESSION; |
| |
| if (!self::isAllowed(self::ADMIN)) { |
| return visual::VIEW_WORKER; |
| } |
| |
| return (!isset($_SESSION["activeView"]) ? visual::VIEW_ADMIN : $_SESSION["activeView"]); |
| } |
| |
| public static function isAdminView() { |
| return (self::getActiveView() === visual::VIEW_ADMIN); |
| } |
| |
| public static function changeActiveView($view) { |
| $_SESSION["activeView"] = $view; |
| } |
| |
| public static function passwordIsGoodEnough($password) { |
| return (strlen($password) >= 8 && preg_match('/[A-Z]/', $password)); |
| } |
| |
| public static function cleanSignInAttempts($retentionDays = "DEFAULT") { |
| global $con, $conf; |
| |
| if ($retentionDays === "DEFAULT") $retentionDays = $conf["signinThrottling"]["retentionDays"]; |
| |
| $sretentionDays = (int)$retentionDays; |
| if ($retentionDays < 0) return false; |
| |
| return mysqli_query($con, "DELETE FROM signinattempts WHERE signinattempttime < (NOW() - INTERVAL $sretentionDays DAY)"); |
| } |
| } |