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Auth.php
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<?php
namespace PHPAuth;
use Exception;
use PDO;
use PDOException;
use PHPMailer\PHPMailer\PHPMailer;
use ReCaptcha\ReCaptcha;
use RuntimeException;
use ZxcvbnPhp\Zxcvbn;
/*require_once 'AuthInterface.php';*/
/**
* PHPAuth is a secure PHP Authentication class
* that easily integrates into any site.
*
* @link https://github.com/PHPAuth/PHPAuth
*/
class Auth
{
public const HASH_LENGTH = 40;
public const TOKEN_LENGTH = 20;
/**
* @var PDO $dbh
*/
protected $dbh;
/**
* @var \stdClass Config
*/
public $config;
/**
* Public 'is_logged' field
* @var bool
*/
public $isAuthenticated = false;
/**
* @var null
*/
protected $currentuser = null;
/**
* @var \stdClass $messages_dictionary
*/
protected $messages_dictionary = [];
/**
* @var \stdClass $recaptcha_config
*/
protected $recaptcha_config = [];
/**
* Initiates database connection
*
* @param PDO $dbh
* @param Config $config
*/
public function __construct(PDO $dbh, Config $config)
{
if (version_compare(PHP_VERSION, '7.1.0', '<')) {
exit($this->__lang('php_version_required', '7.1.0'));
}
$this->dbh = $dbh;
$this->config = $config;
$this->recaptcha_config = $this->config->recaptcha;
$this->messages_dictionary = $this->config->dictionary;
date_default_timezone_set($this->config->site_timezone);
$this->isAuthenticated = $this->isLogged();
}
/**
* Logs a user in
* @param string $email
* @param string $password
* @param int $remember
* @param string $captcha_response
*
* @return array $return
*/
//@todo: => loginUser
public function login(string $email, string $password, int $remember = 0, string $captcha_response = ''): array
{
$return = [];
$return['error'] = true;
$return['hash'] = '';
$block_status = $this->isBlocked();
if ($block_status == 'verify') {
if ($this->checkCaptcha($captcha_response) == false) {
$return['message'] = $this->__lang('user_verify_failed');
return $return;
}
}
if ($block_status == 'block') {
$return['message'] = $this->__lang('user_blocked');
return $return;
}
$validateEmail = $this->validateEmail($email);
$validatePassword = $this->validatePassword($password);
if ($validateEmail['error'] == 1) {
$this->addAttempt();
$return['message'] = $validateEmail['message']; // ?? $this->__lang("account_email_invalid");
return $return;
} elseif ($validatePassword['error'] == 1) {
$this->addAttempt();
$return['message'] = $validatePassword['message']; // ?? $this->__lang("account_password_invalid");
return $return;
} elseif ($remember != 0 && $remember != 1) {
$this->addAttempt();
$return['message'] = $this->__lang('remember_me_invalid'); //@todo => login_remember_me_invalid
return $return;
}
$uid = $this->getUID($email);
if (!$uid) {
$this->addAttempt();
$return['message'] = $this->__lang('account_not_found');
return $return;
}
$user = $this->getBaseUser($uid);
if (!$this->password_verify_with_rehash($password, $user['password'], $uid)) {
$this->addAttempt();
$return['message'] = $this->__lang('email_password_incorrect');
return $return;
}
if ($user['isactive'] != 1) {
$this->addAttempt();
$return['message'] = $this->__lang('account_inactive');
return $return;
}
$sessiondata = $this->addSession($user['uid'], $remember);
if ($sessiondata == false) {
$return['message'] = $this->__lang('system_error') . ' #01';
return $return;
}
$return['error'] = false;
$return['message'] = $this->__lang('logged_in');
$return['hash'] = $sessiondata['hash'];
$return['expire'] = $sessiondata['expire'];
$return['cookie_name'] = $this->config->cookie_name;
return $return;
}
/**
* Creates a new user, adds them to database
* @param string $email
* @param string $password
* @param string $repeatpassword
* @param array $params
* @param string $captcha_response = ""
* @param boolean $use_email_activation = false
* @return array $return
*/
//@todo: => registerUserAccount
public function register(string $email, string $password, string $repeatpassword, array $params = [], string $captcha_response = '', bool $use_email_activation = false): array
{
$return = [];
$return['error'] = true;
$block_status = $this->isBlocked();
if ($block_status == 'verify') {
if ($this->checkCaptcha($captcha_response) == false) {
$return['message'] = $this->__lang('user_verify_failed');
return $return;
}
}
if ($block_status == 'block') {
$return['message'] = $this->__lang('user_blocked');
return $return;
}
if ($password !== $repeatpassword) {
$return['message'] = $this->__lang('password_nomatch');
return $return;
}
// Validate email
$validateEmail = $this->validateEmail($email);
if ($validateEmail['error'] == 1) {
$return['message'] = $validateEmail['message'];
return $return;
}
// Validate password
$validatePassword = $this->validatePassword($password);
if ($validatePassword['error'] == 1) {
$return['message'] = $validatePassword['message'];
return $return;
}
$zxcvbn = new Zxcvbn();
if ($zxcvbn->passwordStrength($password)['score'] < intval($this->config->password_min_score)) {
$return['message'] = $this->__lang('password_weak');
return $return;
}
if ($this->isEmailTaken($email)) {
$this->addAttempt();
$return['message'] = $this->__lang('email_taken');
return $return;
}
$addUser = $this->addUser($email, $password, $params, $use_email_activation);
if ($addUser['error'] != 0) {
$return['message'] = $addUser['message'];
return $return;
}
$return['error'] = false;
$return['message'] =
($use_email_activation == true
? $this->__lang('register_success')
: $this->__lang('register_success_emailmessage_suppressed'));
$return['uid'] = $addUser['uid'];
$return['token'] = $addUser['token'];
return $return;
}
/**
* Activates a user's account
* @param string $activate_token
* @return array $return
*/
//@todo: rename to 'activateUserAccount'
public function activate(string $activate_token): array
{
$return['error'] = true;
$block_status = $this->isBlocked();
if ($block_status == 'block') {
$return['message'] = $this->__lang('user_blocked');
return $return;
}
if (strlen($activate_token) !== self::TOKEN_LENGTH) {
$this->addAttempt();
$return['message'] = $this->__lang('activationkey_invalid');
return $return;
}
// 'user is already activated' will never triggered, because after successful activation token removed from DB
// NOW is no any way to determine, is this token used for activation or not?
$request_result = $this->getRequest($activate_token, 'activation');
if ($request_result['error']) {
$return['message'] = $request_result['message'];
return $return;
}
if ($this->getBaseUser($request_result['uid'])['isactive'] == 1) {
$this->addAttempt();
$this->deleteRequest($request_result['id']);
$return['message'] = $this->__lang('system_error') . ' #02'; // user activated, but activate token not expired
return $return;
}
$query = "UPDATE {$this->config->table_users} SET isactive = :isactive WHERE id = :id";
$query_prepared = $this->dbh->prepare($query);
$query_params = [
'isactive' => 1,
'id' => $request_result['uid']
];
$query_prepared->execute($query_params);
$this->deleteRequest($request_result['id']);
$return['error'] = false;
$return['message'] = $this->__lang('account_activated');
return $return;
}
/**
* Creates a reset key for an email address and sends email
* @param string $email
* @param boolean $use_email_activation
* @return array $return
*/
public function requestReset(string $email, bool $use_email_activation = false): array
{
$state['error'] = true;
$block_status = $this->isBlocked();
if ($block_status == 'block') {
$state['message'] = $this->__lang('user_blocked');
return $state;
}
$validateEmail = $this->validateEmail($email);
if ($validateEmail['error'] == 1) {
$state['message'] = $this->__lang('email_invalid');
return $state;
}
$query = "SELECT id, email FROM {$this->config->table_users} WHERE email = :email";
$query_prepared = $this->dbh->prepare($query);
$query_prepared->execute(['email' => $email]);
$row = $query_prepared->fetch(PDO::FETCH_ASSOC);
if (!$row) {
$this->addAttempt();
$state['message'] = $this->__lang('email_incorrect');
return $state;
}
$addRequest = $this->addRequest($row['id'], $email, 'reset', $use_email_activation);
if ($addRequest['error'] == 1) {
$this->addAttempt();
$state['message'] = $addRequest['message'];
return $state;
}
$state['uid'] = $row['id'];
$state['error'] = false;
$state['message'] = ($use_email_activation == true ? $this->__lang('reset_requested') : $this->__lang('reset_requested_emailmessage_suppressed'));
$state['token'] = $addRequest['token'];
$state['expire'] = $addRequest['expire'];
return $state;
}
/**
* Logs out the session, identified by hash
* @param string $hash
* @return boolean
*/
public function logout(string $hash): bool
{
if (strlen($hash) != self::HASH_LENGTH) {
return false;
}
$this->isAuthenticated = false;
$this->currentuser = null;
return $this->deleteSession($hash);
}
/**
* Logs out of all sessions for specified uid
* @param int $uid
* @return boolean
*/
public function logoutAll(int $uid): bool
{
$this->isAuthenticated = false;
$this->currentuser = null;
return $this->deleteExistingSessions($uid);
}
/**
* Hashes provided password with Bcrypt
* @param string $password
* @return string
*/
public function getHash(string $password)
{
return password_hash($password, PASSWORD_BCRYPT, ['cost' => $this->config->bcrypt_cost]);
}
/**
* Gets UID for a given email address or zero if email not found
* @param string $email
* @return int $uid
*/
public function getUID(string $email): int
{
$query = "SELECT id FROM {$this->config->table_users} WHERE email = :email";
$query_prepared = $this->dbh->prepare($query);
$query_prepared->execute(['email' => strtolower($email)]);
$uid = $query_prepared->fetchColumn();
return $uid === false ? 0 : $uid;
}
/**
* Creates a session for a specified user id
* @param int $uid
* @param boolean $remember
* @return array | false $data
*/
protected function addSession(int $uid, bool $remember)
{
$ip = $this->getIp();
$user = $this->getBaseUser($uid);
if (!$user) {
return false;
}
$data['hash'] = sha1($this->config->site_key . microtime());
$agent = isset($_SERVER['HTTP_USER_AGENT']) ? $_SERVER['HTTP_USER_AGENT'] : '';
if (!$this->config->allow_concurrent_sessions) {
$this->deleteExistingSessions($uid);
}
if ($remember == true) {
$data['expire'] = strtotime($this->config->cookie_remember);
} else {
$data['expire'] = strtotime($this->config->cookie_forget);
}
$data['cookie_crc'] = sha1($data['hash'] . $this->config->site_key);
// don't use INET_ATON(:ip), use ip2long(), 'cause SQLite or PosgreSQL does not have INET_ATON() function
$query = "
INSERT INTO {$this->config->table_sessions}
(uid, hash, expiredate, ip, agent, cookie_crc)
VALUES (:uid, :hash, :expiredate, :ip, :agent, :cookie_crc)
";
$query_prepared = $this->dbh->prepare($query);
$query_params = [
'uid' => $uid,
'hash' => $data['hash'],
'expiredate' => date('Y-m-d H:i:s', $data['expire']),
'ip' => $ip,
'agent' => $agent,
'cookie_crc' => $data['cookie_crc']
];
if (!$query_prepared->execute($query_params)) {
return false;
}
$cookie_options = [
'expires' => $data['expire'],
'path' => $this->config->cookie_path,
'domain' => $this->config->cookie_domain,
'secure' => $this->config->cookie_secure,
'httponly' => $this->config->cookie_http,
'samesite' => $this->config->cookie_samesite ?? 'Lax' // None || Lax || Strict
];
if (!setcookie($this->config->cookie_name, $data['hash'], $cookie_options)) {
return false;
}
return $data;
}
/**
* Removes all existing sessions for a given UID
* @param int $uid
* @return boolean
*/
protected function deleteExistingSessions(int $uid): bool
{
$query = "DELETE FROM {$this->config->table_sessions} WHERE uid = :uid";
$query_prepared = $this->dbh->prepare($query);
$query_prepared->execute(['uid' => $uid]);
$this->removeCookie();
return $query_prepared->rowCount() > 0;
}
/**
* Removes a session based on hash
* @param string $hash
*
* @return boolean
*/
protected function deleteSession(string $hash): bool
{
$query = "DELETE FROM {$this->config->table_sessions} WHERE hash = :hash";
$query_prepared = $this->dbh->prepare($query);
$query_prepared->execute(['hash' => $hash]);
$this->removeCookie();
return $query_prepared->rowCount() == 1;
}
/**
* Clear user cookie
*/
protected function removeCookie() : bool
{
if(isset($_COOKIE[$this->config->cookie_name])) {
unset($_COOKIE[$this->config->cookie_name]);
}
if (!setcookie($this->config->cookie_name, '', -1, '/')) {
return false;
}
return true;
}
/**
* Function to check if a session is valid
* @param string $hash
* @param null|string $device_id
*
* @return boolean
*/
public function checkSession(string $hash, ?string $device_id = null): bool
{
$ip = $this->getIp();
$block_status = $this->isBlocked();
if ($block_status == 'block') {
$return['message'] = $this->__lang('user_blocked');
return false;
}
if (strlen($hash) != self::HASH_LENGTH) {
return false;
}
// INET_NTOA(ip)
$query = "SELECT id, uid, expiredate, ip, agent, cookie_crc, device_id FROM {$this->config->table_sessions} WHERE hash = :hash";
$query_prepared = $this->dbh->prepare($query);
$query_params = [
'hash' => $hash
];
$query_prepared->execute($query_params);
if ($query_prepared->rowCount() == 0) {
return false;
}
$row = $query_prepared->fetch(PDO::FETCH_ASSOC);
$uid = $row['uid'];
$expiredate = strtotime($row['expiredate']);
$currentdate = strtotime(date('Y-m-d H:i:s'));
$db_ip = $row['ip'];
$db_cookie = $row['cookie_crc'];
$db_device_id = $row['device_id'];
if ($currentdate > $expiredate) {
$this->deleteSession($hash);
return false;
}
if ($device_id != null) {
if ($db_device_id !== $device_id) {
return false;
}
} else {
if ($ip !== $db_ip) {
return false;
}
}
if ($db_cookie == sha1($hash . $this->config->site_key)) {
if ($expiredate - $currentdate < strtotime($this->config->cookie_renew) - $currentdate) {
$this->deleteSession($hash);
$this->addSession($uid, false);
}
return true;
}
return false;
}
/**
* Retrieves the UID associated with a given session hash
* @param string $hash
*
* @return int|null $uid
*/
public function getSessionUID(string $hash): int
{
$query = "SELECT uid FROM {$this->config->table_sessions} WHERE hash = :hash";
$query_prepared = $this->dbh->prepare($query);
$query_params = [
'hash' => $hash
];
$query_prepared->execute($query_params);
if ($query_prepared->rowCount() == 0) {
return 0;
}
return (int)$query_prepared->fetch(PDO::FETCH_ASSOC)['uid'];
}
/**
* Checks if an email is already in use
* @param string $email
* @return boolean
*/
public function isEmailTaken(string $email): bool
{
$query = "SELECT count(*) FROM {$this->config->table_users} WHERE email = :email";
$query_prepared = $this->dbh->prepare($query);
$query_prepared->execute(['email' => $email]);
if ($query_prepared->fetchColumn() == 0) {
return false;
}
return true;
}
/**
* Checks if an email is banned
* @param string $email
*
* @return boolean
*/
public function isEmailBanned(string $email): bool
{
try {
$this->dbh->query("SELECT * FROM {$this->config->table_emails_banned} LIMIT 1;");
} catch (PDOException $e) {
return false;
}
$query = "SELECT count(*) FROM {$this->config->table_emails_banned} WHERE domain = :domain";
$query_prepared = $this->dbh->prepare($query);
$query_prepared->execute([
'domain' => (strtolower(explode('@', $email)[1]))
]);
if ($query_prepared->fetchColumn() == 0) {
return false;
}
return true;
}
/**
* Adds a new user to database
* @param string $email -- email
* @param string $password -- password
* @param array $params -- additional params
* @param boolean $use_email_activation -- activate email confirm or not
* @return array
*/
protected function addUser(string $email, string $password, array $params = [], bool $use_email_activation = false): array
{
$return['error'] = true;
$query = "INSERT INTO {$this->config->table_users} (isactive) VALUES (0)";
$query_prepared = $this->dbh->prepare($query);
if (!$query_prepared->execute()) {
$return['message'] = $this->__lang('system_error') . ' #03';
return $return;
}
$uid = $this->dbh->lastInsertId("{$this->config->table_users}_id_seq");
$email = htmlentities(strtolower($email));
$token = '';
if ($use_email_activation) {
$addRequest = $this->addRequest($uid, $email, 'activation', $use_email_activation);
$token = $addRequest['token'];
if ($addRequest['error'] == 1) {
$query = "DELETE FROM {$this->config->table_users} WHERE id = :id";
$query_prepared = $this->dbh->prepare($query);
$query_params = [
'id' => $uid
];
$query_prepared->execute($query_params);
$return['message'] = $addRequest['message'];
return $return;
}
$isactive = 0;
} else {
$isactive = 1;
}
$password = $this->getHash($password);
if (is_array($params) && count($params) > 0) {
$customParamsQueryArray = [];
foreach ($params as $paramKey => $paramValue) {
$customParamsQueryArray[] = ['value' => $paramKey . ' = ?'];
}
$setParams = ', ' . implode(', ', array_map(function ($entry) {
return $entry['value'];
}, $customParamsQueryArray));
} else {
$setParams = '';
}
$query = "UPDATE {$this->config->table_users} SET email = ?, password = ?, isactive = ? {$setParams} WHERE id = ?";
$query_prepared = $this->dbh->prepare($query);
$bindParams = array_values(array_merge([$email, $password, $isactive], $params, [$uid]));
if (!$query_prepared->execute($bindParams)) {
$query = "DELETE FROM {$this->config->table_users} WHERE id = ?";
$query_prepared = $this->dbh->prepare($query);
$query_prepared->execute([$uid]);
$return['message'] = $this->__lang('system_error') . ' #04';
return $return;
}
$return['uid'] = $uid;
$return['error'] = false;
$return['token'] = $token;
return $return;
}
/**
* Gets basic user data for a given UID and returns an array
* @param int $uid
* @return array|bool $data
*/
protected function getBaseUser(int $uid)
{
$query = "SELECT email, password, isactive FROM {$this->config->table_users} WHERE id = :id";
$query_prepared = $this->dbh->prepare($query);
$query_prepared->execute(['id' => $uid]);
$data = $query_prepared->fetch(PDO::FETCH_ASSOC);
if (!$data) {
return false;
}
$data['uid'] = $uid;
return $data;
}
/**
* Gets public user data for a given UID and returns an array, password will be returned if param $withpassword is TRUE
* @param int $uid
* @param boolean|false $withpassword
* @return array|null $data
*/
public function getUser(int $uid, bool $withpassword = false): ?array
{
$query = "SELECT * FROM {$this->config->table_users} WHERE id = :id";
$query_prepared = $this->dbh->prepare($query);
$query_prepared->execute(['id' => $uid]);
$data = $query_prepared->fetch(PDO::FETCH_ASSOC);
if (!$data) {
return null;
}
$data['uid'] = $uid;
if ($withpassword !== true) {
unset($data['password']);
}
return $data;
}
/**
* Allows a user to delete their account
* @param int $uid
* @param string $password
* @param string $captcha_response
* @return array $return
*/
public function deleteUser(int $uid, string $password, string $captcha_response = ''): array
{
$return = [];
$return['error'] = true;
$block_status = $this->isBlocked();
if ($block_status == 'verify') {
if ($this->checkCaptcha($captcha_response) == false) {
$return['message'] = $this->__lang('user_verify_failed');
return $return;
}
}
if ($block_status == 'block') {
$return['message'] = $this->__lang('user_blocked');
return $return;
}
// check password
$validatePassword = $this->validatePassword($password);
if ($validatePassword['error'] == 1) {
$this->addAttempt();
$return['message'] = $validatePassword['message'];
return $return;
}
$user = $this->getBaseUser($uid);
if (!password_verify($password, $user['password'])) {
$this->addAttempt();
$return['message'] = $this->__lang('password_incorrect');
return $return;
}
// remove user by function
$return = $this->deleteUserForced($uid);
return $return;
}
/**
* Force delete user without password or captcha verification.
*
* @param int $uid
* @return array
*/
public function deleteUserForced(int $uid): array
{
$return = [];
$return['error'] = true;
$query = "DELETE FROM {$this->config->table_users} WHERE id = :uid";
$query_prepared = $this->dbh->prepare($query);
if (!$query_prepared->execute(['uid' => $uid])) {
$return['message'] = $this->__lang('system_error') . ' #05';
return $return;
}
$query = "DELETE FROM {$this->config->table_sessions} WHERE uid = :uid";
$query_prepared = $this->dbh->prepare($query);
if (!$query_prepared->execute(['uid' => $uid])) {
$return['message'] = $this->__lang('system_error') . ' #06';
return $return;
}
$query = "DELETE FROM {$this->config->table_requests} WHERE uid = :uid";
$query_prepared = $this->dbh->prepare($query);
if (!$query_prepared->execute(['uid' => $uid])) {
$return['message'] = $this->__lang('system_error') . ' #07';
return $return;
}
$return['error'] = false;
$return['message'] = $this->__lang('account_deleted');
return $return;
}
/**
* Creates an activation entry and sends email to user
* @param int $uid
* @param string $email
* @param string $type
* @param boolean $use_email_activation
* @return array
*/
protected function addRequest(int $uid, string $email, string $type, bool $use_email_activation = false): array
{
$return = [];
$return['error'] = true;
if ($type == 'activation') {
$dictionary_key__request_exists = 'activation_exists';
} elseif ($type == 'reset') {
$dictionary_key__request_exists = 'reset_exists';
} else {
$return['message'] = $this->__lang('system_error') . ' #08';
return $return;
}
$send_email = true;
// if not set up manually, check config data
if (false !== $use_email_activation) {
$use_email_activation = true;
if ($type == 'reset' && !!$this->config->emailmessage_suppress_reset) {
$send_email = false;
}
if ($type == 'activation' && !!$this->config->emailmessage_suppress_activation) {
$send_email = false;
}
}
$query = "SELECT id, expire FROM {$this->config->table_requests} WHERE uid = :uid AND type = :type";
$query_prepared = $this->dbh->prepare($query);
$query_prepared->execute(['uid' => $uid, 'type' => $type]);
$row_count = $query_prepared->rowCount();
if ($row_count > 0) {
$row = $query_prepared->fetch(PDO::FETCH_ASSOC);
$expiredate = strtotime($row['expire']);
$currentdate = strtotime(date('Y-m-d H:i:s'));
if ($currentdate < $expiredate) {
$return['message'] = $this->__lang($dictionary_key__request_exists, date($this->config->custom_datetime_format, $expiredate));
return $return;
}
$this->deleteRequest($row['id']);
}
/*// uneffective call. And, never be called, 'cause "Activation key is incorrect." throwen before
if ($type == "activation" && $this->getBaseUser($uid)['isactive'] == 1) {
$return['message'] = $this->__lang("already_activated");
return $return;
}
*/
$token = $this->getRandomKey(self::TOKEN_LENGTH); // use GUID for tokens?
$expire = date('Y-m-d H:i:s', strtotime($this->config->request_key_expiration));
$query = "INSERT INTO {$this->config->table_requests} (uid, token, expire, type) VALUES (:uid, :token, :expire, :type)";
$query_prepared = $this->dbh->prepare($query);
$query_params = [
'uid' => $uid,
'token' => $token,
'expire' => $expire,
'type' => $type
];
if (!$query_prepared->execute($query_params)) {
$return['message'] = $this->__lang('system_error') . ' #09';
return $return;
}
$request_id = $this->dbh->lastInsertId();