144 lines
4.3 KiB
C++
144 lines
4.3 KiB
C++
/*
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* Copyright (C) 2019 Emeric Poupon
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*
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* This file is part of LMS.
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*
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* LMS is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* LMS is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with LMS. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "AuthTokenService.hpp"
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#include <Wt/Auth/HashFunction.h>
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#include <Wt/Auth/PasswordStrengthValidator.h>
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#include <Wt/WRandom.h>
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#include "services/auth/Types.hpp"
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#include "database/AuthToken.hpp"
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#include "database/Session.hpp"
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#include "database/User.hpp"
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#include "core/Exception.hpp"
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#include "core/ILogger.hpp"
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namespace lms::auth
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{
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std::unique_ptr<IAuthTokenService> createAuthTokenService(db::Db& db, std::size_t maxThrottlerEntries)
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{
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return std::make_unique<AuthTokenService>(db, maxThrottlerEntries);
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}
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static const Wt::Auth::SHA1HashFunction sha1Function;
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AuthTokenService::AuthTokenService(db::Db& db, std::size_t maxThrottlerEntries)
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: AuthServiceBase {db}
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, _loginThrottler {maxThrottlerEntries}
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{
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}
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std::string
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AuthTokenService::createAuthToken(db::UserId userId, const Wt::WDateTime& expiry)
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{
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const std::string secret {Wt::WRandom::generateId(32)};
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const std::string secretHash {sha1Function.compute(secret, {})};
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db::Session& session {getDbSession()};
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auto transaction {session.createWriteTransaction()};
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db::User::pointer user {db::User::find(session, userId)};
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if (!user)
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throw Exception {"User deleted"};
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db::AuthToken::pointer authToken {session.create<db::AuthToken>(secretHash, expiry, user)};
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LMS_LOG(UI, DEBUG, "Created auth token for user '" << user->getLoginName() << "', expiry = " << expiry.toString());
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if (user->getAuthTokensCount() >= 50)
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db::AuthToken::removeExpiredTokens(session, Wt::WDateTime::currentDateTime());
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return secret;
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}
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std::optional<AuthTokenService::AuthTokenProcessResult::AuthTokenInfo>
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AuthTokenService::processAuthToken(std::string_view secret)
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{
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const std::string secretHash {sha1Function.compute(std::string {secret}, {})};
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db::Session& session {getDbSession()};
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auto transaction {session.createWriteTransaction()};
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db::AuthToken::pointer authToken {db::AuthToken::find(session, secretHash)};
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if (!authToken)
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return std::nullopt;
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if (authToken->getExpiry() < Wt::WDateTime::currentDateTime())
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{
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authToken.remove();
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return std::nullopt;
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}
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LMS_LOG(UI, DEBUG, "Found auth token for user '" << authToken->getUser()->getLoginName() << "'!");
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AuthTokenService::AuthTokenProcessResult::AuthTokenInfo res {authToken->getUser()->getId(), authToken->getExpiry()};
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authToken.remove();
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return res;
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}
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AuthTokenService::AuthTokenProcessResult
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AuthTokenService::processAuthToken(const boost::asio::ip::address& clientAddress, std::string_view tokenValue)
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{
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// Do not waste too much resource on brute force attacks (optim)
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{
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std::shared_lock lock {_mutex};
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if (_loginThrottler.isClientThrottled(clientAddress))
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return AuthTokenProcessResult {AuthTokenProcessResult::State::Throttled};
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}
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auto res {processAuthToken(tokenValue)};
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{
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std::unique_lock lock {_mutex};
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if (_loginThrottler.isClientThrottled(clientAddress))
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return AuthTokenProcessResult {AuthTokenProcessResult::State::Throttled};
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if (!res)
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{
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_loginThrottler.onBadClientAttempt(clientAddress);
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return AuthTokenProcessResult {AuthTokenProcessResult::State::Denied};
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}
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_loginThrottler.onGoodClientAttempt(clientAddress);
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onUserAuthenticated(res->userId);
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return AuthTokenProcessResult {AuthTokenProcessResult::State::Granted, std::move(*res)};
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}
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}
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void
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AuthTokenService::clearAuthTokens(db::UserId userId)
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{
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db::Session& session {getDbSession()};
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auto transaction {session.createWriteTransaction()};
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db::User::pointer user {db::User::find(session, userId)};
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if (!user)
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throw Exception {"User deleted"};
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user.modify()->clearAuthTokens();
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}
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} // namespace lms::auth
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