Project import generated by Copybara.
GitOrigin-RevId: 63746295f1a5ab5a619056791995793d65529e62
diff --git a/src/inc/security.php b/src/inc/security.php
new file mode 100644
index 0000000..1d3159b
--- /dev/null
+++ b/src/inc/security.php
@@ -0,0 +1,362 @@
+<?php
+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)");
+ }
+}