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<?php
class Users {
function __construct($file = "../users.dat") {
$this->userFile = $file;
$this->users = json_decode(file_get_contents($file),true);
}
function hasSession() {
session_start();
if (isset($_SESSION['username'])) {
return $_SESSION['username'];
}
return false;
}
function storeData(User $user) {
$this->users[$user->getUsername()] = $user->getData();
file_put_contents($this->userFile,json_encode($this->users));
}
function loadUser($name) {
if (isset($this->users[$name])) {
return new User($name,$this->users[$name]);
} else {
return false;
}
}
}
class User {
function __construct($user,$data) {
$this->data = $data;
$this->user = $user;
}
function auth($pass) {
if ($this->data['password'] === $pass) {
return true;
}
return false;
}
function startSession() {
$_SESSION['username'] = $this->user;
}
function doLogin() {
session_regenerate_id();
$_SESSION['loggedin'] = true;
$_SESSION['ua'] = $_SERVER['HTTP_USER_AGENT'];
}
function doOTP() {
$_SESSION['OTP'] = true;
}
function isOTP() {
if (isset($_SESSION['OTP']) && $_SESSION['OTP'] == true) {
return true;
}
return false;
}
function isLoggedIn() {
if (isset($_SESSION['loggedin']) && $_SESSION['loggedin'] == true &&
isset($_SESSION['ua']) && $_SESSION['ua'] == $_SERVER['HTTP_USER_AGENT']
) {
return $_SESSION['username'];
}
return false;
}
function getUsername() {
return $this->user;
}
function getSecret() {
if (isset($this->data['secret'])) {
return $this->data['secret'];
}
return false;
}
function generateSecret() {
$g = new GoogleAuthenticator();
$secret = $g->generateSecret();
$this->data['secret'] = $secret;
return $secret;
}
function getData() {
return $this->data;
}
function setOTPCookie() {
$time = floor(time() / (3600 * 24) ); // get day number
//about using the user agent: It's easy to fake it, but it increases the barrier for stealing and reusing cookies nevertheless
// and it doesn't do any harm (except that it's invalid after a browser upgrade, but that may be even intented)
$cookie = $time.":".hash_hmac("sha1",$this->getUsername().":".$time.":". $_SERVER['HTTP_USER_AGENT'],$this->getSecret());
setcookie ( "otp", $cookie, time() + (30 * 24 * 3600), null,null,null,true );
}
function hasValidOTPCookie() {
// 0 = tomorrow it is invalid
$daysUntilInvalid = 0;
$time = (string) floor((time() / (3600 * 24))) ; // get day number
if (isset($_COOKIE['otp'])) {
list( $otpday,$hash) = explode(":",$_COOKIE['otp']);
if ( $otpday >= $time - $daysUntilInvalid && $hash == hash_hmac('sha1',$this->getUsername().":".$otpday .":". $_SERVER['HTTP_USER_AGENT'] , $this->getSecret())
) {
return true;
}
}
return false;
}
}
?>
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