121 lines
3.4 KiB
C++
121 lines
3.4 KiB
C++
/*
|
|
* Copyright (C) 2019 Emeric Poupon
|
|
*
|
|
* This file is part of LMS.
|
|
*
|
|
* LMS is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* LMS is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with LMS. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
/* This file contains some classes in order to get info from file using the libavconv */
|
|
|
|
#include "LoginThrottler.hpp"
|
|
|
|
#include "utils/ILogger.hpp"
|
|
#include "utils/Random.hpp"
|
|
|
|
namespace Auth {
|
|
|
|
static
|
|
boost::asio::ip::address_v6
|
|
getAddressWithMask(const boost::asio::ip::address_v6& address, std::size_t prefix)
|
|
{
|
|
assert(prefix % 8 == 0);
|
|
|
|
std::array<uint8_t, 16> truncatedBytes;
|
|
|
|
auto bytes {address.to_bytes()};
|
|
std::copy(std::cbegin(bytes), std::next(std::cbegin(bytes), prefix / 8), truncatedBytes.begin());
|
|
|
|
return boost::asio::ip::address_v6 {truncatedBytes};
|
|
}
|
|
|
|
static
|
|
boost::asio::ip::address
|
|
getAddressToThrottle(const boost::asio::ip::address& address)
|
|
{
|
|
return address.is_v6() ? getAddressWithMask(address.to_v6(), 64) : address;
|
|
}
|
|
|
|
void
|
|
LoginThrottler::removeOutdatedEntries()
|
|
{
|
|
const Wt::WDateTime now {Wt::WDateTime::currentDateTime()};
|
|
|
|
for (auto it {std::begin(_attemptsInfo)}; it != std::end(_attemptsInfo); )
|
|
{
|
|
if (it->second.nextAttempt <= now)
|
|
it = _attemptsInfo.erase(it);
|
|
else
|
|
++it;
|
|
}
|
|
}
|
|
|
|
void
|
|
LoginThrottler::onBadClientAttempt(const boost::asio::ip::address& address)
|
|
{
|
|
const boost::asio::ip::address clientAddress {getAddressToThrottle(address)};
|
|
const Wt::WDateTime now {Wt::WDateTime::currentDateTime()};
|
|
|
|
if (_attemptsInfo.size() >= _maxEntries)
|
|
removeOutdatedEntries();
|
|
if (_attemptsInfo.size() >= _maxEntries)
|
|
_attemptsInfo.erase(Random::pickRandom(_attemptsInfo));
|
|
|
|
AttemptInfo& attemptInfo {_attemptsInfo[address]};
|
|
if (attemptInfo.nextAttempt.isValid())
|
|
{
|
|
assert(attemptInfo.nextAttempt <= now); // should not be called if throttled
|
|
attemptInfo = {};
|
|
}
|
|
|
|
attemptInfo.badConsecutiveAttemptCount += 1;
|
|
|
|
LMS_LOG(AUTH, DEBUG, "Registering bad attempt for '" << clientAddress.to_string() << "', consecutive bad attempts count = " << attemptInfo.badConsecutiveAttemptCount);
|
|
if (attemptInfo.badConsecutiveAttemptCount >= _maxBadConsecutiveAttemptCount)
|
|
{
|
|
LMS_LOG(AUTH, DEBUG, "Throttling '" << clientAddress.to_string() << "'");
|
|
attemptInfo.nextAttempt = now.addMSecs(std::chrono::duration_cast<std::chrono::milliseconds>(_throttlingDuration).count());
|
|
}
|
|
else
|
|
{
|
|
attemptInfo.nextAttempt = {};
|
|
}
|
|
}
|
|
|
|
void
|
|
LoginThrottler::onGoodClientAttempt(const boost::asio::ip::address& address)
|
|
{
|
|
const boost::asio::ip::address clientAddress {getAddressToThrottle(address)};
|
|
|
|
_attemptsInfo.erase(clientAddress);
|
|
}
|
|
|
|
bool
|
|
LoginThrottler::isClientThrottled(const boost::asio::ip::address& address) const
|
|
{
|
|
const boost::asio::ip::address clientAddress {getAddressToThrottle(address)};
|
|
|
|
auto it {_attemptsInfo.find(clientAddress)};
|
|
if (it == _attemptsInfo.end())
|
|
return false;
|
|
|
|
if (!it->second.nextAttempt.isValid())
|
|
return false;
|
|
|
|
return it->second.nextAttempt > Wt::WDateTime::currentDateTime();
|
|
}
|
|
|
|
} // Auth
|
|
|