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. $ex");
}
/**
* 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 == '');
}
/**
* 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:
" . $errors[2] . "");
}
}
/*
* http://stackoverflow.com/a/20075147
*/
if (!function_exists('base_url')) {
function base_url($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;
}
}
/**
* 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 $range IP/CIDR netmask eg. 127.0.0.0/24, also 127.0.0.1 is accepted and /32 assumed
* @return boolean true if the ip is in this range / false if not.
* @author Thorsten Ott
*/
function ip4_in_cidr($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 $cidr CIDR netmask
* @return boolean true if the IP is in this range, false otherwise.
* @author MW.
*/
function ip6_in_cidr($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")]);
}
}