Moved away from Wt::Auth and use a simplified (?) login/password system with a login throttler based on IP address

src/auth/AuthService.cpp

@@ -0,0 +1,105 @@
+/*
+ * 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 "AuthService.hpp"
+
+#include <iomanip>
+#include <Wt/Auth/HashFunction.h>
+#include <Wt/Auth/PasswordStrengthValidator.h>
+#include <Wt/Utils.h>
+
+#include "database/Session.hpp"
+#include "utils/Utils.hpp"
+#include "utils/Logger.hpp"
+
+namespace Auth {
+
+AuthService::AuthService(std::size_t maxThrottlerEntries)
+: _loginThrottler {maxThrottlerEntries}
+{
+}
+
+AuthService::PasswordCheckResult
+AuthService::checkUserPassword(Database::Session& session, const boost::asio::ip::address& clientAddress, const std::string& loginName, const std::string& password)
+{
+	if (_loginThrottler.isClientThrottled(clientAddress))
+		return PasswordCheckResult::Throttled;
+
+	Database::User::PasswordHash passwordHash;
+	{
+		auto transaction {session.createSharedTransaction()};
+
+		const Database::User::pointer user {Database::User::getByLoginName(session, loginName)};
+		if (!user)
+		{
+			_loginThrottler.onBadClientAttempt(clientAddress);
+			return PasswordCheckResult::Mismatch;
+		}
+
+		passwordHash = user->getPasswordHash();
+	}
+
+	const Wt::Auth::BCryptHashFunction hashFunc {6};
+	if (hashFunc.verify(password, passwordHash.salt, passwordHash.hash))
+	{
+		_loginThrottler.onGoodClientAttempt(clientAddress);
+		return PasswordCheckResult::Match;
+	}
+	else
+	{
+		_loginThrottler.onBadClientAttempt(clientAddress);
+		return PasswordCheckResult::Mismatch;
+	}
+}
+
+Database::User::PasswordHash
+AuthService::hashPassword(const std::string& password) const
+{
+	std::array<std::uint8_t, 16> buffer;
+	fillRandom(buffer);
+
+	std::ostringstream oss;
+	for (std::uint8_t b : buffer)
+		oss << std::hex << std::setfill('0') << std::setw(2) << static_cast<int>(b);
+
+	const std::string salt {Wt::Utils::base64Encode(oss.str(), false)};
+
+	const Wt::Auth::BCryptHashFunction hashFunc {6};
+	return {salt, hashFunc.compute(password, salt)};
+}
+
+bool
+AuthService::evaluatePasswordStrength(const std::string& loginName, const std::string& password) const
+{
+	Wt::Auth::PasswordStrengthValidator validator;
+	validator.setMinimumLength(Wt::Auth::PasswordStrengthType::OneCharClass, 4);
+	validator.setMinimumLength(Wt::Auth::PasswordStrengthType::TwoCharClass, 4);
+	validator.setMinimumLength(Wt::Auth::PasswordStrengthType::PassPhrase, 4);
+	validator.setMinimumLength(Wt::Auth::PasswordStrengthType::ThreeCharClass, 4);
+	validator.setMinimumLength(Wt::Auth::PasswordStrengthType::FourCharClass, 4);
+	validator.setMinimumPassPhraseWords(1);
+	validator.setMinimumMatchLength(3);
+
+	return validator.evaluateStrength(password, loginName, "").isValid();
+}
+
+} // namespace Auth
+