host = $host;
		$this->pdo = Db::pdo();
		$host->add_hook($host::HOOK_AUTH_USER, $this);
	}
	function authenticate($login, $password) {
		$pwd_hash1 = encrypt_password($password);
		$pwd_hash2 = encrypt_password($password, $login);
		$otp = $_REQUEST["otp"];
		if (get_schema_version() > 96) {
			if (!defined('AUTH_DISABLE_OTP') || !AUTH_DISABLE_OTP) {
				$sth = $this->pdo->prepare("SELECT otp_enabled,salt FROM ttrss_users WHERE
					login = ?");
				$sth->execute([$login]);
				if ($row = $sth->fetch()) {
					$base32 = new \OTPHP\Base32();
					$otp_enabled = $row['otp_enabled'];
					$secret = $base32->encode(sha1($row['salt']));
					$topt = new \OTPHP\TOTP($secret);
					$otp_check = $topt->now();
					if ($otp_enabled) {
						if ($otp) {
							if ($otp != $otp_check) {
								return false;
							}
						} else {
							$return = urlencode($_REQUEST["return"]);
							?>
							
							
								
									Agriget
									
								
								
							
							
							
							
							
							 87) {
			$sth = $this->pdo->prepare("SELECT salt FROM ttrss_users WHERE login = ?");
			$sth->execute([$login]);
			if ($row = $sth->fetch()) {
				$salt = $row['salt'];
				if ($salt == "") {
					$sth = $this->pdo->prepare("SELECT id FROM ttrss_users WHERE
                        login = ? AND (pwd_hash = ? OR pwd_hash = ?)");
					$sth->execute([$login, $pwd_hash1, $pwd_hash2]);
					// verify and upgrade password to new salt base
					if ($row = $sth->fetch()) {
						// upgrade password to MODE2
						$user_id = $row['id'];
						$salt = substr(bin2hex(get_random_bytes(125)), 0, 250);
						$pwd_hash = encrypt_password($password, $salt, true);
						$sth = $this->pdo->prepare("UPDATE ttrss_users SET
					        pwd_hash = ?, salt = ? WHERE login = ?");
						$sth->execute([$pwd_hash, $salt, $login]);
						return $user_id;
					} else {
						return false;
					}
				} else {
					$pwd_hash = encrypt_password($password, $salt, true);
					$sth = $this->pdo->prepare("SELECT id
  		                  FROM ttrss_users WHERE
					      login = ? AND pwd_hash = ?");
					$sth->execute([$login, $pwd_hash]);
					if ($row = $sth->fetch()) {
						return $row['id'];
					}
				}
			} else {
				$sth = $this->pdo->prepare("SELECT id
                    FROM ttrss_users WHERE
                      login = ? AND (pwd_hash = ? OR pwd_hash = ?)");
				$sth->execute([$login, $pwd_hash1, $pwd_hash2]);
				if ($row = $sth->fetch()) {
					return $row['id'];
				}
			}
		} else {
			$sth = $this->pdo->prepare("SELECT id
                    FROM ttrss_users WHERE
                      login = ? AND (pwd_hash = ? OR pwd_hash = ?)");
			$sth->execute([$login, $pwd_hash1, $pwd_hash2]);
			if ($row = $sth->fetch()) {
				return $row['id'];
			}
        }
		return false;
	}
	function check_password($owner_uid, $password) {
		$sth = $this->pdo->prepare("SELECT salt,login FROM ttrss_users WHERE
			id = ?");
		$sth->execute([$owner_uid]);
		if ($row = $sth->fetch()) {
			$salt = $row['salt'];
			$login = $row['login'];
			if (!$salt) {
				$password_hash1 = encrypt_password($password);
				$password_hash2 = encrypt_password($password, $login);
				$sth = $this->pdo->prepare("SELECT id FROM ttrss_users WHERE
                    id = ? AND (pwd_hash = ? OR pwd_hash = ?)");
				$sth->execute([$owner_uid, $password_hash1, $password_hash2]);
				return $sth->fetch();
			} else {
				$password_hash = encrypt_password($password, $salt, true);
				$sth = $this->pdo->prepare("SELECT id FROM ttrss_users WHERE
                    id = ? AND pwd_hash = ?");
				$sth->execute([$owner_uid, $password_hash]);
				return $sth->fetch();
			}
		}
        return false;
	}
	function change_password($owner_uid, $old_password, $new_password) {
		if ($this->check_password($owner_uid, $old_password)) {
			$new_salt = substr(bin2hex(get_random_bytes(125)), 0, 250);
			$new_password_hash = encrypt_password($new_password, $new_salt, true);
			$sth = $this->pdo->prepare("UPDATE ttrss_users SET
				pwd_hash = ?, salt = ?, otp_enabled = false
					WHERE id = ?");
			$sth->execute([$new_password_hash, $new_salt, $owner_uid]);
			$_SESSION["pwd_hash"] = $new_password_hash;
			return __("Password has been changed.");
		} else {
			return "ERROR: ".__('Old password is incorrect.');
		}
	}
	function api_version() {
		return 2;
	}
}
?>