forked from Business/AccountHub
393 lines
11 KiB
PHP
393 lines
11 KiB
PHP
<?php
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/**
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* This file contains global settings and utility functions.
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*/
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ob_start(); // allow sending headers after content
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// Unicode, solves almost all stupid encoding problems
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header('Content-Type: text/html; charset=utf-8');
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// l33t $ecurity h4x
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header('X-Content-Type-Options: nosniff');
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header('X-XSS-Protection: 1; mode=block');
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header('X-Powered-By: Late-night coding frenzies (plz send caffeine, thx)');
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$session_length = 60 * 60; // 1 hour
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session_set_cookie_params($session_length, "/", null, false, true);
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session_start(); // stick some cookies in it
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//// renew session cookie
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setcookie(session_name(), session_id(), time() + $session_length);
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//
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// Composer
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require __DIR__ . '/vendor/autoload.php';
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// Settings file
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require __DIR__ . '/settings.php';
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// List of alert messages
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require __DIR__ . '/lang/messages.php';
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// text strings (i18n)
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require __DIR__ . '/lang/' . LANGUAGE . ".php";
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function sendError($error) {
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die("<!DOCTYPE html><html><head><title>Error</title></head><body><h1 style='color: red; font-family: sans-serif; font-size:100%;'>" . htmlspecialchars($error) . "</h1></body></html>");
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}
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date_default_timezone_set(TIMEZONE);
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// Database settings
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// Also inits database and stuff
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use Medoo\Medoo;
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$database;
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try {
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$database = new Medoo([
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'database_type' => DB_TYPE,
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'database_name' => DB_NAME,
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'server' => DB_SERVER,
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'username' => DB_USER,
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'password' => DB_PASS,
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'charset' => DB_CHARSET
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]);
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} catch (Exception $ex) {
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//header('HTTP/1.1 500 Internal Server Error');
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sendError("Database error. Try again later. $ex");
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}
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if (!DEBUG) {
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error_reporting(0);
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} else {
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error_reporting(E_ALL);
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ini_set('display_errors', 'On');
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}
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$VARS;
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if ($_SERVER['REQUEST_METHOD'] === 'POST') {
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$VARS = $_POST;
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define("GET", false);
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} else {
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$VARS = $_GET;
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define("GET", true);
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}
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/**
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* Checks if a string or whatever is empty.
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* @param $str The thingy to check
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* @return boolean True if it's empty or whatever.
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*/
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function is_empty($str) {
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return (is_null($str) || !isset($str) || $str == '');
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}
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/**
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* I18N string getter. If the key doesn't exist, outputs the key itself.
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* @param string $key I18N string key
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* @param boolean $echo whether to echo the result or return it (default echo)
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*/
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function lang($key, $echo = true) {
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if (array_key_exists($key, $GLOBALS['STRINGS'])) {
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$str = $GLOBALS['STRINGS'][$key];
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} else {
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$str = $key;
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}
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if ($echo) {
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echo $str;
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} else {
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return $str;
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}
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}
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/**
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* I18N string getter (with builder). If the key doesn't exist, outputs the key itself.
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* @param string $key I18N string key
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* @param array $replace key-value array of replacements.
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* If the string value is "hello {abc}" and you give ["abc" => "123"], the
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* result will be "hello 123".
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* @param boolean $echo whether to echo the result or return it (default echo)
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*/
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function lang2($key, $replace, $echo = true) {
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if (array_key_exists($key, $GLOBALS['STRINGS'])) {
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$str = $GLOBALS['STRINGS'][$key];
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} else {
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$str = $key;
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}
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foreach ($replace as $find => $repl) {
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$str = str_replace("{" . $find . "}", $repl, $str);
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}
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if ($echo) {
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echo $str;
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} else {
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return $str;
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}
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}
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/**
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* Add strings to the i18n global array.
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* @param array $strings ['key' => 'value']
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*/
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function addLangStrings($strings) {
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$GLOBALS['STRINGS'] = array_merge($GLOBALS['STRINGS'], $strings);
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}
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/**
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* Add strings to the i18n global array. Accepts an array of language code
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* keys, with the values a key-value array of strings.
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* @param array $strings ['en_us' => ['key' => 'value']]
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*/
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function addMultiLangStrings($strings) {
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if (!is_empty($strings[LANGUAGE])) {
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$GLOBALS['STRINGS'] = array_merge($GLOBALS['STRINGS'], $strings[LANGUAGE]);
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}
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}
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/**
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* Checks if an email address is valid.
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* @param string $email Email to check
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* @return boolean True if email passes validation, else false.
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*/
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function isValidEmail($email) {
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return filter_var($email, FILTER_VALIDATE_EMAIL);
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}
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/**
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* Hashes the given plaintext password
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* @param String $password
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* @return String the hash, using bcrypt
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*/
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function encryptPassword($password) {
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return password_hash($password, PASSWORD_BCRYPT);
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}
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/**
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* Securely verify a password and its hash
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* @param String $password
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* @param String $hash the hash to compare to
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* @return boolean True if password OK, else false
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*/
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function comparePassword($password, $hash) {
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return password_verify($password, $hash);
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}
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function dieifnotloggedin() {
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if ($_SESSION['loggedin'] != true) {
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sendError("Session expired. Please log out and log in again.");
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}
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}
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/**
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* Check if the previous database action had a problem.
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* @param array $specials int=>string array with special response messages for SQL errors
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*/
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function checkDBError($specials = []) {
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global $database;
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$errors = $database->error();
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if (!is_null($errors[1])) {
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foreach ($specials as $code => $text) {
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if ($errors[1] == $code) {
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sendError($text);
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}
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}
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sendError("A database error occurred:<br /><code>" . $errors[2] . "</code>");
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}
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}
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/*
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* http://stackoverflow.com/a/20075147/2534036
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*/
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if (!function_exists('base_url')) {
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function base_url($atRoot = FALSE, $atCore = FALSE, $parse = FALSE) {
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if (isset($_SERVER['HTTP_HOST'])) {
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$http = isset($_SERVER['HTTPS']) && strtolower($_SERVER['HTTPS']) !== 'off' ? 'https' : 'http';
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$hostname = $_SERVER['HTTP_HOST'];
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$dir = str_replace(basename($_SERVER['SCRIPT_NAME']), '', $_SERVER['SCRIPT_NAME']);
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$core = preg_split('@/@', str_replace($_SERVER['DOCUMENT_ROOT'], '', realpath(dirname(__FILE__))), NULL, PREG_SPLIT_NO_EMPTY);
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$core = $core[0];
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$tmplt = $atRoot ? ($atCore ? "%s://%s/%s/" : "%s://%s/") : ($atCore ? "%s://%s/%s/" : "%s://%s%s");
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$end = $atRoot ? ($atCore ? $core : $hostname) : ($atCore ? $core : $dir);
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$base_url = sprintf($tmplt, $http, $hostname, $end);
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} else
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$base_url = 'http://localhost/';
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if ($parse) {
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$base_url = parse_url($base_url);
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if (isset($base_url['path']))
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if ($base_url['path'] == '/')
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$base_url['path'] = '';
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}
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return $base_url;
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}
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}
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function redirectToPageId($id, $args, $dontdie) {
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header('Location: ' . URL . '?id=' . $id . $args);
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if (is_null($dontdie)) {
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die("Please go to " . URL . '?id=' . $id . $args);
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}
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}
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function redirectIfNotLoggedIn() {
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if ($_SESSION['loggedin'] !== TRUE) {
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header('Location: ' . URL . '/login.php');
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die();
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}
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}
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/**
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* Check if a given ipv4 address is in a given cidr
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* @param string $ip IP to check in IPV4 format eg. 127.0.0.1
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* @param string $range IP/CIDR netmask eg. 127.0.0.0/24, also 127.0.0.1 is accepted and /32 assumed
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* @return boolean true if the ip is in this range / false if not.
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* @author Thorsten Ott <https://gist.github.com/tott/7684443>
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*/
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function ip4_in_cidr($ip, $cidr) {
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if (strpos($cidr, '/') == false) {
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$cidr .= '/32';
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}
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// $range is in IP/CIDR format eg 127.0.0.1/24
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list( $cidr, $netmask ) = explode('/', $cidr, 2);
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$range_decimal = ip2long($cidr);
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$ip_decimal = ip2long($ip);
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$wildcard_decimal = pow(2, ( 32 - $netmask)) - 1;
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$netmask_decimal = ~ $wildcard_decimal;
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return ( ( $ip_decimal & $netmask_decimal ) == ( $range_decimal & $netmask_decimal ) );
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}
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/**
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* Check if a given ipv6 address is in a given cidr
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* @param string $ip IP to check in IPV6 format
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* @param string $cidr CIDR netmask
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* @return boolean true if the IP is in this range, false otherwise.
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* @author MW. <https://stackoverflow.com/a/7952169/2534036>
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*/
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function ip6_in_cidr($ip, $cidr) {
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$address = inet_pton($ip);
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$subnetAddress = inet_pton(explode("/", $cidr)[0]);
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$subnetMask = explode("/", $cidr)[1];
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$addr = str_repeat("f", $subnetMask / 4);
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switch ($subnetMask % 4) {
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case 0:
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break;
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case 1:
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$addr .= "8";
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break;
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case 2:
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$addr .= "c";
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break;
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case 3:
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$addr .= "e";
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break;
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}
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$addr = str_pad($addr, 32, '0');
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$addr = pack("H*", $addr);
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$binMask = $addr;
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return ($address & $binMask) == $subnetAddress;
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}
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/**
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* Check if the REMOTE_ADDR is on Cloudflare's network.
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* @return boolean true if it is, otherwise false
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*/
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function validateCloudflare() {
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if (filter_var($_SERVER["REMOTE_ADDR"], FILTER_VALIDATE_IP, FILTER_FLAG_IPV6)) {
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// Using IPv6
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$cloudflare_ips_v6 = [
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"2400:cb00::/32",
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"2405:8100::/32",
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"2405:b500::/32",
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"2606:4700::/32",
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"2803:f800::/32",
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"2c0f:f248::/32",
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"2a06:98c0::/29"
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];
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$valid = false;
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foreach ($cloudflare_ips_v6 as $cidr) {
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if (ip6_in_cidr($_SERVER["REMOTE_ADDR"], $cidr)) {
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$valid = true;
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break;
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}
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}
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} else {
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// Using IPv4
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$cloudflare_ips_v4 = [
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"103.21.244.0/22",
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"103.22.200.0/22",
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"103.31.4.0/22",
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"104.16.0.0/12",
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"108.162.192.0/18",
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"131.0.72.0/22",
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"141.101.64.0/18",
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"162.158.0.0/15",
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"172.64.0.0/13",
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"173.245.48.0/20",
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"188.114.96.0/20",
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"190.93.240.0/20",
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"197.234.240.0/22",
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"198.41.128.0/17"
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];
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$valid = false;
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foreach ($cloudflare_ips_v4 as $cidr) {
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if (ip4_in_cidr($_SERVER["REMOTE_ADDR"], $cidr)) {
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$valid = true;
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break;
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}
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}
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}
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return $valid;
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}
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/**
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* Makes a good guess at the client's real IP address.
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*
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* @return string Client IP or `0.0.0.0` if we can't find anything
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*/
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function getClientIP() {
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// If CloudFlare is in the mix, we should use it.
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// Check if the request is actually from CloudFlare before trusting it.
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if (isset($_SERVER["HTTP_CF_CONNECTING_IP"])) {
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if (validateCloudflare()) {
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return $_SERVER["HTTP_CF_CONNECTING_IP"];
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}
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}
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if (isset($_SERVER["REMOTE_ADDR"])) {
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return $_SERVER["REMOTE_ADDR"];
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}
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return "0.0.0.0"; // This will not happen unless we aren't a web server
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}
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/**
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* Check if the client's IP has been doing too many brute-force-friendly
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* requests lately.
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* Kills the script with a "friendly" error and response code 429
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* (Too Many Requests) if the last access time in the DB is too near.
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*
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* Also updates the rate_limit table with the latest data and purges old rows.
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* @global type $database
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*/
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function engageRateLimit() {
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global $database;
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$delay = date("Y-m-d H:i:s", strtotime("-2 seconds"));
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$database->delete('rate_limit', ["lastaction[<]" => $delay]);
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if ($database->has('rate_limit', ["AND" => ["ipaddr" => getClientIP()]])) {
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http_response_code(429);
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// JSONify it so API clients don't scream too loud
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die(json_encode(["status" => "ERROR", "msg" => "You're going too fast. Slow down, mkay?"]));
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} else {
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// Add a record for the IP address
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$database->insert('rate_limit', ["ipaddr" => getClientIP(), "lastaction" => date("Y-m-d H:i:s")]);
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}
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}
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