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AccountHub/required.php

393 lines
11 KiB
PHP

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