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/*
* This file is part of the AzerothCore Project. See AUTHORS file for Copyright information
*
* This program 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 2 of the License, or
* (at your option) any later version.
*
* This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "RASession.h"
#include "AccountMgr.h"
#include "Config.h"
#include "DatabaseEnv.h"
#include "Duration.h"
#include "Log.h"
#include "MotdMgr.h"
#include "QueryResult.h"
#include "SRP6.h"
#include "Util.h"
#include "World.h"
#include <boost/asio/buffer.hpp>
#include <boost/asio/read_until.hpp>
#include <thread>
using boost::asio::ip::tcp;
void RASession::Start()
{
// wait 1 second for active connections to send negotiation request
for (int counter = 0; counter < 10 && _socket.available() == 0; counter++)
std::this_thread::sleep_for(100ms);
// Check if there are bytes available, if they are, then the client is requesting the negotiation
if (_socket.available() > 0)
{
// Handle subnegotiation
char buf[1024] = { };
_socket.read_some(boost::asio::buffer(buf));
// Send the end-of-negotiation packet
uint8 const reply[2] = { 0xFF, 0xF0 };
_socket.write_some(boost::asio::buffer(reply));
}
Send("Authentication Required\r\n");
Send("Username: ");
std::string username = ReadString();
if (username.empty())
return;
LOG_INFO("commands.ra", "Accepting RA connection from user {} (IP: {})", username, GetRemoteIpAddress());
Send("Password: ");
std::string password = ReadString();
if (password.empty())
return;
if (!CheckAccessLevel(username) || !CheckPassword(username, password))
{
Send("Authentication failed\r\n");
_socket.close();
return;
}
LOG_INFO("commands.ra", "User {} (IP: {}) authenticated correctly to RA", username, GetRemoteIpAddress());
// Authentication successful, send the motd
Send(std::string(std::string(sMotdMgr->GetMotd(DEFAULT_LOCALE)) + "\r\n").c_str());
// Read commands
for (;;)
{
Send("AC>");
std::string command = ReadString();
if (ProcessCommand(command))
break;
}
_socket.close();
}
int RASession::Send(std::string_view data)
{
std::ostream os(&_writeBuffer);
os << data;
std::size_t written = _socket.send(_writeBuffer.data());
_writeBuffer.consume(written);
return written;
}
std::string RASession::ReadString()
{
boost::system::error_code error;
std::size_t read = boost::asio::read_until(_socket, _readBuffer, "\r\n", error);
if (!read)
{
_socket.close();
return "";
}
std::string line;
std::istream is(&_readBuffer);
std::getline(is, line);
if (*line.rbegin() == '\r')
line.erase(line.length() - 1);
return line;
}
bool RASession::CheckAccessLevel(const std::string& user)
{
std::string safeUser = user;
Utf8ToUpperOnlyLatin(safeUser);
auto* stmt = LoginDatabase.GetPreparedStatement(LOGIN_SEL_ACCOUNT_ACCESS);
stmt->SetData(0, safeUser);
PreparedQueryResult result = LoginDatabase.Query(stmt);
if (!result)
{
LOG_INFO("commands.ra", "User {} does not exist in database", user);
return false;
}
Field* fields = result->Fetch();
if (fields[1].Get<uint8>() < sConfigMgr->GetOption<int32>("Ra.MinLevel", 3))
{
LOG_INFO("commands.ra", "User {} has no privilege to login", user);
return false;
}
else if (fields[2].Get<int32>() != -1)
{
LOG_INFO("commands.ra", "User {} has to be assigned on all realms (with RealmID = '-1')", user);
return false;
}
return true;
}
bool RASession::CheckPassword(const std::string& user, const std::string& pass)
{
std::string safe_user = user;
std::transform(safe_user.begin(), safe_user.end(), safe_user.begin(), ::toupper);
Utf8ToUpperOnlyLatin(safe_user);
std::string safe_pass = pass;
Utf8ToUpperOnlyLatin(safe_pass);
std::transform(safe_pass.begin(), safe_pass.end(), safe_pass.begin(), ::toupper);
auto* stmt = LoginDatabase.GetPreparedStatement(LOGIN_SEL_CHECK_PASSWORD_BY_NAME);
stmt->SetData(0, safe_user);
if (PreparedQueryResult result = LoginDatabase.Query(stmt))
{
Acore::Crypto::SRP6::Salt salt = (*result)[0].Get<Binary, Acore::Crypto::SRP6::SALT_LENGTH>();
Acore::Crypto::SRP6::Verifier verifier = (*result)[1].Get<Binary, Acore::Crypto::SRP6::VERIFIER_LENGTH>();
if (Acore::Crypto::SRP6::CheckLogin(safe_user, safe_pass, salt, verifier))
return true;
}
LOG_INFO("commands.ra", "Wrong password for user: {}", user);
return false;
}
bool RASession::ProcessCommand(std::string& command)
{
if (command.length() == 0)
return true;
LOG_INFO("commands.ra", "Received command: {}", command);
// handle quit, exit and logout commands to terminate connection
if (command == "quit" || command == "exit" || command == "logout")
{
Send("Bye\r\n");
return true;
}
// Obtain a new promise per command
delete _commandExecuting;
_commandExecuting = new std::promise<void>();
CliCommandHolder* cmd = new CliCommandHolder(this, command.c_str(), &RASession::CommandPrint, &RASession::CommandFinished);
sWorld->QueueCliCommand(cmd);
// Wait for the command to finish
_commandExecuting->get_future().wait();
return false;
}
void RASession::CommandPrint(void* callbackArg, std::string_view text)
{
if (text.empty())
{
return;
}
RASession* session = static_cast<RASession*>(callbackArg);
session->Send(text);
}
void RASession::CommandFinished(void* callbackArg, bool /*success*/)
{
RASession* session = static_cast<RASession*>(callbackArg);
session->_commandExecuting->set_value();
}
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