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110396447f2f414f8834c1b86c764d97704537b7
TrinityCore/src/server/authserver/Server/AuthSession.cpp
Subv 110396447f Fixed the authserver not accepting clients. 
Fixed using hostnames in the realmlist table.
2014-07-07 14:25:17 -05:00

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/*
* Copyright (C) 2008-2014 TrinityCore <http://www.trinitycore.org/>
* Copyright (C) 2005-2009 MaNGOS <http://getmangos.com/>
*
* 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 <memory>
#include <boost/lexical_cast.hpp>
#include <boost/asio/write.hpp>
#include <AuthSession.h>
#include <Log.h>
#include "ByteBuffer.h"
#include "AuthCodes.h"
#include "Database/DatabaseEnv.h"
#include "SHA1.h"
#include "openssl/crypto.h"
#include "Configuration/Config.h"
#include "RealmList.h"
using boost::asio::ip::tcp;
enum eAuthCmd
{
AUTH_LOGON_CHALLENGE = 0x00,
AUTH_LOGON_PROOF = 0x01,
AUTH_RECONNECT_CHALLENGE = 0x02,
AUTH_RECONNECT_PROOF = 0x03,
REALM_LIST = 0x10,
XFER_INITIATE = 0x30,
XFER_DATA = 0x31,
XFER_ACCEPT = 0x32,
XFER_RESUME = 0x33,
XFER_CANCEL = 0x34
};
enum eStatus
{
STATUS_CONNECTED = 0,
STATUS_AUTHED
};
#pragma pack(push, 1)
typedef struct AUTH_LOGON_CHALLENGE_C
{
uint8 cmd;
uint8 error;
uint16 size;
uint8 gamename[4];
uint8 version1;
uint8 version2;
uint8 version3;
uint16 build;
uint8 platform[4];
uint8 os[4];
uint8 country[4];
uint32 timezone_bias;
uint32 ip;
uint8 I_len;
uint8 I[1];
} sAuthLogonChallenge_C;
typedef struct AUTH_LOGON_PROOF_C
{
uint8 cmd;
uint8 A[32];
uint8 M1[20];
uint8 crc_hash[20];
uint8 number_of_keys;
uint8 securityFlags;
} sAuthLogonProof_C;
typedef struct AUTH_LOGON_PROOF_S
{
uint8 cmd;
uint8 error;
uint8 M2[20];
uint32 unk1;
uint32 unk2;
uint16 unk3;
} sAuthLogonProof_S;
typedef struct AUTH_LOGON_PROOF_S_OLD
{
uint8 cmd;
uint8 error;
uint8 M2[20];
uint32 unk2;
} sAuthLogonProof_S_Old;
typedef struct AUTH_RECONNECT_PROOF_C
{
uint8 cmd;
uint8 R1[16];
uint8 R2[20];
uint8 R3[20];
uint8 number_of_keys;
} sAuthReconnectProof_C;
#pragma pack(pop)
typedef struct AuthHandler
{
eAuthCmd cmd;
uint32 status;
size_t packetSize;
bool (AuthSession::*handler)();
} AuthHandler;
#define BYTE_SIZE 32
#define REALMLIST_SKIP_PACKETS 5
const AuthHandler table[] =
{
{ AUTH_LOGON_CHALLENGE, STATUS_CONNECTED, sizeof(AUTH_LOGON_CHALLENGE_C), &AuthSession::_HandleLogonChallenge },
{ AUTH_LOGON_PROOF, STATUS_CONNECTED, sizeof(AUTH_LOGON_PROOF_C), &AuthSession::_HandleLogonProof },
{ AUTH_RECONNECT_CHALLENGE, STATUS_CONNECTED, sizeof(AUTH_LOGON_CHALLENGE_C), &AuthSession::_HandleReconnectChallenge },
{ AUTH_RECONNECT_PROOF, STATUS_CONNECTED, sizeof(AUTH_RECONNECT_PROOF_C), &AuthSession::_HandleReconnectProof },
{ REALM_LIST, STATUS_AUTHED, REALMLIST_SKIP_PACKETS, &AuthSession::_HandleRealmList }
};
void AuthSession::AsyncReadHeader()
{
auto self(shared_from_this());
_socket.async_read_some(boost::asio::buffer(_readBuffer, 1), [this, self](boost::system::error_code error, size_t transferedBytes)
{
if (!error && transferedBytes == 1)
{
for (const AuthHandler& entry : table)
{
if ((uint8)entry.cmd == _readBuffer[0] && (entry.status == STATUS_CONNECTED || (_isAuthenticated && entry.status == STATUS_AUTHED)))
{
// Handle dynamic size packet
if (_readBuffer[0] == AUTH_LOGON_CHALLENGE)
{
_socket.read_some(boost::asio::buffer(&_readBuffer[1], sizeof(uint8) + sizeof(uint16))); //error + size
AsyncReadData(entry.handler, *reinterpret_cast<uint16*>(&_readBuffer[2]), sizeof(uint8) + sizeof(uint8) + sizeof(uint16)); // cmd + error + size
}
else
{
AsyncReadData(entry.handler, entry.packetSize, sizeof(uint8));
}
break;
}
}
}
else
{
_socket.close();
}
});
}
void AuthSession::AsyncReadData(bool (AuthSession::*handler)(), size_t dataSize, size_t bufferOffSet)
{
auto self(shared_from_this());
_socket.async_read_some(boost::asio::buffer(&_readBuffer[bufferOffSet], dataSize), [handler, this, self](boost::system::error_code error, size_t transferedBytes)
{
if (!error && transferedBytes > 0)
{
if (!(*this.*handler)())
{
_socket.close();
return;
}
AsyncReadHeader();
}
else
{
_socket.close();
}
});
}
void AuthSession::AsyncWrite(std::size_t length)
{
boost::asio::async_write(_socket, boost::asio::buffer(_writeBuffer, length), [this](boost::system::error_code error, std::size_t /*length*/)
{
if (error)
{
_socket.close();
}
});
}
bool AuthSession::_HandleLogonChallenge()
{
sAuthLogonChallenge_C *challenge = (sAuthLogonChallenge_C*)&_readBuffer;
//TC_LOG_DEBUG("server.authserver", "[AuthChallenge] got full packet, %#04x bytes", challenge->size);
TC_LOG_DEBUG("server.authserver", "[AuthChallenge] name(%d): '%s'", challenge->I_len, challenge->I);
ByteBuffer pkt;
_login.assign((const char*)challenge->I, challenge->I_len);
_build = challenge->build;
_expversion = uint8(AuthHelper::IsPostBCAcceptedClientBuild(_build) ? POST_BC_EXP_FLAG : (AuthHelper::IsPreBCAcceptedClientBuild(_build) ? PRE_BC_EXP_FLAG : NO_VALID_EXP_FLAG));
_os = (const char*)challenge->os;
if (_os.size() > 4)
return false;
// Restore string order as its byte order is reversed
std::reverse(_os.begin(), _os.end());
pkt << uint8(AUTH_LOGON_CHALLENGE);
pkt << uint8(0x00);
// Verify that this IP is not in the ip_banned table
LoginDatabase.Execute(LoginDatabase.GetPreparedStatement(LOGIN_DEL_EXPIRED_IP_BANS));
std::string const& ipAddress = _socket.remote_endpoint().address().to_string();
unsigned short port = _socket.remote_endpoint().port();
PreparedStatement* stmt = LoginDatabase.GetPreparedStatement(LOGIN_SEL_IP_BANNED);
stmt->setString(0, ipAddress);
PreparedQueryResult result = LoginDatabase.Query(stmt);
if (result)
{
pkt << uint8(WOW_FAIL_BANNED);
TC_LOG_DEBUG("server.authserver", "'%s:%d' [AuthChallenge] Banned ip tries to login!", ipAddress.c_str(), port);
}
else
{
// Get the account details from the account table
// No SQL injection (prepared statement)
stmt = LoginDatabase.GetPreparedStatement(LOGIN_SEL_LOGONCHALLENGE);
stmt->setString(0, _login);
PreparedQueryResult res2 = LoginDatabase.Query(stmt);
if (res2)
{
Field* fields = res2->Fetch();
// If the IP is 'locked', check that the player comes indeed from the correct IP address
bool locked = false;
if (fields[2].GetUInt8() == 1) // if ip is locked
{
TC_LOG_DEBUG("server.authserver", "[AuthChallenge] Account '%s' is locked to IP - '%s'", _login.c_str(), fields[4].GetCString());
TC_LOG_DEBUG("server.authserver", "[AuthChallenge] Player address is '%s'", ipAddress.c_str());
if (strcmp(fields[4].GetCString(), ipAddress.c_str()) != 0)
{
TC_LOG_DEBUG("server.authserver", "[AuthChallenge] Account IP differs");
pkt << uint8(WOW_FAIL_LOCKED_ENFORCED);
locked = true;
}
else
TC_LOG_DEBUG("server.authserver", "[AuthChallenge] Account IP matches");
}
else
{
TC_LOG_DEBUG("server.authserver", "[AuthChallenge] Account '%s' is not locked to ip", _login.c_str());
std::string accountCountry = fields[3].GetString();
if (accountCountry.empty() || accountCountry == "00")
TC_LOG_DEBUG("server.authserver", "[AuthChallenge] Account '%s' is not locked to country", _login.c_str());
else if (!accountCountry.empty())
{
uint32 ip = inet_addr(ipAddress.c_str());
EndianConvertReverse(ip);
stmt = LoginDatabase.GetPreparedStatement(LOGIN_SEL_LOGON_COUNTRY);
stmt->setUInt32(0, ip);
if (PreparedQueryResult sessionCountryQuery = LoginDatabase.Query(stmt))
{
std::string loginCountry = (*sessionCountryQuery)[0].GetString();
TC_LOG_DEBUG("server.authserver", "[AuthChallenge] Account '%s' is locked to country: '%s' Player country is '%s'", _login.c_str(),
accountCountry.c_str(), loginCountry.c_str());
if (loginCountry != accountCountry)
{
TC_LOG_DEBUG("server.authserver", "[AuthChallenge] Account country differs.");
pkt << uint8(WOW_FAIL_UNLOCKABLE_LOCK);
locked = true;
}
else
TC_LOG_DEBUG("server.authserver", "[AuthChallenge] Account country matches");
}
else
TC_LOG_DEBUG("server.authserver", "[AuthChallenge] IP2NATION Table empty");
}
}
if (!locked)
{
//set expired bans to inactive
LoginDatabase.DirectExecute(LoginDatabase.GetPreparedStatement(LOGIN_UPD_EXPIRED_ACCOUNT_BANS));
// If the account is banned, reject the logon attempt
stmt = LoginDatabase.GetPreparedStatement(LOGIN_SEL_ACCOUNT_BANNED);
stmt->setUInt32(0, fields[1].GetUInt32());
PreparedQueryResult banresult = LoginDatabase.Query(stmt);
if (banresult)
{
if ((*banresult)[0].GetUInt32() == (*banresult)[1].GetUInt32())
{
pkt << uint8(WOW_FAIL_BANNED);
TC_LOG_DEBUG("server.authserver", "'%s:%d' [AuthChallenge] Banned account %s tried to login!", ipAddress.c_str(),
port, _login.c_str());
}
else
{
pkt << uint8(WOW_FAIL_SUSPENDED);
TC_LOG_DEBUG("server.authserver", "'%s:%d' [AuthChallenge] Temporarily banned account %s tried to login!",
ipAddress.c_str(), port, _login.c_str());
}
}
else
{
// Get the password from the account table, upper it, and make the SRP6 calculation
std::string rI = fields[0].GetString();
// Don't calculate (v, s) if there are already some in the database
std::string databaseV = fields[6].GetString();
std::string databaseS = fields[7].GetString();
TC_LOG_DEBUG("network", "database authentication values: v='%s' s='%s'", databaseV.c_str(), databaseS.c_str());
// multiply with 2 since bytes are stored as hexstring
if (databaseV.size() != BYTE_SIZE * 2 || databaseS.size() != BYTE_SIZE * 2)
SetVSFields(rI);
else
{
s.SetHexStr(databaseS.c_str());
v.SetHexStr(databaseV.c_str());
}
b.SetRand(19 * 8);
BigNumber gmod = g.ModExp(b, N);
B = ((v * 3) + gmod) % N;
ASSERT(gmod.GetNumBytes() <= 32);
BigNumber unk3;
unk3.SetRand(16 * 8);
// Fill the response packet with the result
if (AuthHelper::IsAcceptedClientBuild(_build))
pkt << uint8(WOW_SUCCESS);
else
pkt << uint8(WOW_FAIL_VERSION_INVALID);
// B may be calculated < 32B so we force minimal length to 32B
pkt.append(B.AsByteArray(32).get(), 32); // 32 bytes
pkt << uint8(1);
pkt.append(g.AsByteArray().get(), 1);
pkt << uint8(32);
pkt.append(N.AsByteArray(32).get(), 32);
pkt.append(s.AsByteArray().get(), s.GetNumBytes()); // 32 bytes
pkt.append(unk3.AsByteArray(16).get(), 16);
uint8 securityFlags = 0;
// Check if token is used
_tokenKey = fields[8].GetString();
if (!_tokenKey.empty())
securityFlags = 4;
pkt << uint8(securityFlags); // security flags (0x0...0x04)
if (securityFlags & 0x01) // PIN input
{
pkt << uint32(0);
pkt << uint64(0) << uint64(0); // 16 bytes hash?
}
if (securityFlags & 0x02) // Matrix input
{
pkt << uint8(0);
pkt << uint8(0);
pkt << uint8(0);
pkt << uint8(0);
pkt << uint64(0);
}
if (securityFlags & 0x04) // Security token input
pkt << uint8(1);
uint8 secLevel = fields[5].GetUInt8();
_accountSecurityLevel = secLevel <= SEC_ADMINISTRATOR ? AccountTypes(secLevel) : SEC_ADMINISTRATOR;
_localizationName.resize(4);
for (int i = 0; i < 4; ++i)
_localizationName[i] = challenge->country[4 - i - 1];
TC_LOG_DEBUG("server.authserver", "'%s:%d' [AuthChallenge] account %s is using '%c%c%c%c' locale (%u)",
ipAddress.c_str(), port, _login.c_str(),
challenge->country[3], challenge->country[2], challenge->country[1], challenge->country[0],
GetLocaleByName(_localizationName)
);
}
}
}
else //no account
pkt << uint8(WOW_FAIL_UNKNOWN_ACCOUNT);
}
std::memcpy(_writeBuffer, (char const*)pkt.contents(), pkt.size());
AsyncWrite(pkt.size());
return true;
}
// Logon Proof command handler
bool AuthSession::_HandleLogonProof()
{
TC_LOG_DEBUG("server.authserver", "Entering _HandleLogonProof");
// Read the packet
sAuthLogonProof_C *logonProof = (sAuthLogonProof_C*)&_readBuffer;
// If the client has no valid version
if (_expversion == NO_VALID_EXP_FLAG)
{
// Check if we have the appropriate patch on the disk
TC_LOG_DEBUG("network", "Client with invalid version, patching is not implemented");
return false;
}
// Continue the SRP6 calculation based on data received from the client
BigNumber A;
A.SetBinary(logonProof->A, 32);
// SRP safeguard: abort if A == 0
if (A.isZero())
{
return false;
}
SHA1Hash sha;
sha.UpdateBigNumbers(&A, &B, NULL);
sha.Finalize();
BigNumber u;
u.SetBinary(sha.GetDigest(), 20);
BigNumber S = (A * (v.ModExp(u, N))).ModExp(b, N);
uint8 t[32];
uint8 t1[16];
uint8 vK[40];
memcpy(t, S.AsByteArray(32).get(), 32);
for (int i = 0; i < 16; ++i)
t1[i] = t[i * 2];
sha.Initialize();
sha.UpdateData(t1, 16);
sha.Finalize();
for (int i = 0; i < 20; ++i)
vK[i * 2] = sha.GetDigest()[i];
for (int i = 0; i < 16; ++i)
t1[i] = t[i * 2 + 1];
sha.Initialize();
sha.UpdateData(t1, 16);
sha.Finalize();
for (int i = 0; i < 20; ++i)
vK[i * 2 + 1] = sha.GetDigest()[i];
K.SetBinary(vK, 40);
uint8 hash[20];
sha.Initialize();
sha.UpdateBigNumbers(&N, NULL);
sha.Finalize();
memcpy(hash, sha.GetDigest(), 20);
sha.Initialize();
sha.UpdateBigNumbers(&g, NULL);
sha.Finalize();
for (int i = 0; i < 20; ++i)
hash[i] ^= sha.GetDigest()[i];
BigNumber t3;
t3.SetBinary(hash, 20);
sha.Initialize();
sha.UpdateData(_login);
sha.Finalize();
uint8 t4[SHA_DIGEST_LENGTH];
memcpy(t4, sha.GetDigest(), SHA_DIGEST_LENGTH);
sha.Initialize();
sha.UpdateBigNumbers(&t3, NULL);
sha.UpdateData(t4, SHA_DIGEST_LENGTH);
sha.UpdateBigNumbers(&s, &A, &B, &K, NULL);
sha.Finalize();
BigNumber M;
M.SetBinary(sha.GetDigest(), 20);
// Check if SRP6 results match (password is correct), else send an error
if (!memcmp(M.AsByteArray().get(), logonProof->M1, 20))
{
TC_LOG_DEBUG("server.authserver", "'%s:%d' User '%s' successfully authenticated", GetRemoteIpAddress().c_str(), GetRemotePort(), _login.c_str());
// Update the sessionkey, last_ip, last login time and reset number of failed logins in the account table for this account
// No SQL injection (escaped user name) and IP address as received by socket
const char *K_hex = K.AsHexStr();
PreparedStatement *stmt = LoginDatabase.GetPreparedStatement(LOGIN_UPD_LOGONPROOF);
stmt->setString(0, K_hex);
stmt->setString(1, GetRemoteIpAddress().c_str());
stmt->setUInt32(2, GetLocaleByName(_localizationName));
stmt->setString(3, _os);
stmt->setString(4, _login);
LoginDatabase.DirectExecute(stmt);
OPENSSL_free((void*)K_hex);
// Finish SRP6 and send the final result to the client
sha.Initialize();
sha.UpdateBigNumbers(&A, &M, &K, NULL);
sha.Finalize();
// Check auth token
if ((logonProof->securityFlags & 0x04) || !_tokenKey.empty())
{
// TODO To be fixed
/*
uint8 size;
socket().recv((char*)&size, 1);
char* token = new char[size + 1];
token[size] = '\0';
socket().recv(token, size);
unsigned int validToken = TOTP::GenerateToken(_tokenKey.c_str());
unsigned int incomingToken = atoi(token);
delete[] token;
if (validToken != incomingToken)
{
char data[] = { AUTH_LOGON_PROOF, WOW_FAIL_UNKNOWN_ACCOUNT, 3, 0 };
socket().send(data, sizeof(data));
return false;
}*/
}
if (_expversion & POST_BC_EXP_FLAG) // 2.x and 3.x clients
{
sAuthLogonProof_S proof;
memcpy(proof.M2, sha.GetDigest(), 20);
proof.cmd = AUTH_LOGON_PROOF;
proof.error = 0;
proof.unk1 = 0x00800000; // Accountflags. 0x01 = GM, 0x08 = Trial, 0x00800000 = Pro pass (arena tournament)
proof.unk2 = 0x00; // SurveyId
proof.unk3 = 0x00;
std::memcpy(_writeBuffer, (char *)&proof, sizeof(proof));
AsyncWrite(sizeof(proof));
}
else
{
sAuthLogonProof_S_Old proof;
memcpy(proof.M2, sha.GetDigest(), 20);
proof.cmd = AUTH_LOGON_PROOF;
proof.error = 0;
proof.unk2 = 0x00;
std::memcpy(_writeBuffer, (char *)&proof, sizeof(proof));
AsyncWrite(sizeof(proof));
}
_isAuthenticated = true;
}
else
{
char data[4] = { AUTH_LOGON_PROOF, WOW_FAIL_UNKNOWN_ACCOUNT, 3, 0 };
std::memcpy(_writeBuffer, data, sizeof(data));
AsyncWrite(sizeof(data));
TC_LOG_DEBUG("server.authserver", "'%s:%d' [AuthChallenge] account %s tried to login with invalid password!",
GetRemoteIpAddress().c_str(), GetRemotePort(), _login.c_str());
uint32 MaxWrongPassCount = sConfigMgr->GetIntDefault("WrongPass.MaxCount", 0);
// We can not include the failed account login hook. However, this is a workaround to still log this.
if (sConfigMgr->GetBoolDefault("Wrong.Password.Login.Logging", false))
{
PreparedStatement* logstmt = LoginDatabase.GetPreparedStatement(LOGIN_INS_FALP_IP_LOGGING);
logstmt->setString(0, _login);
logstmt->setString(1, GetRemoteIpAddress());
logstmt->setString(2, "Logged on failed AccountLogin due wrong password");
LoginDatabase.Execute(logstmt);
}
if (MaxWrongPassCount > 0)
{
//Increment number of failed logins by one and if it reaches the limit temporarily ban that account or IP
PreparedStatement* stmt = LoginDatabase.GetPreparedStatement(LOGIN_UPD_FAILEDLOGINS);
stmt->setString(0, _login);
LoginDatabase.Execute(stmt);
stmt = LoginDatabase.GetPreparedStatement(LOGIN_SEL_FAILEDLOGINS);
stmt->setString(0, _login);
if (PreparedQueryResult loginfail = LoginDatabase.Query(stmt))
{
uint32 failed_logins = (*loginfail)[1].GetUInt32();
if (failed_logins >= MaxWrongPassCount)
{
uint32 WrongPassBanTime = sConfigMgr->GetIntDefault("WrongPass.BanTime", 600);
bool WrongPassBanType = sConfigMgr->GetBoolDefault("WrongPass.BanType", false);
if (WrongPassBanType)
{
uint32 acc_id = (*loginfail)[0].GetUInt32();
stmt = LoginDatabase.GetPreparedStatement(LOGIN_INS_ACCOUNT_AUTO_BANNED);
stmt->setUInt32(0, acc_id);
stmt->setUInt32(1, WrongPassBanTime);
LoginDatabase.Execute(stmt);
TC_LOG_DEBUG("server.authserver", "'%s:%d' [AuthChallenge] account %s got banned for '%u' seconds because it failed to authenticate '%u' times",
GetRemoteIpAddress().c_str(), GetRemotePort(), _login.c_str(), WrongPassBanTime, failed_logins);
}
else
{
stmt = LoginDatabase.GetPreparedStatement(LOGIN_INS_IP_AUTO_BANNED);
stmt->setString(0, GetRemoteIpAddress());
stmt->setUInt32(1, WrongPassBanTime);
LoginDatabase.Execute(stmt);
TC_LOG_DEBUG("server.authserver", "'%s:%d' [AuthChallenge] IP got banned for '%u' seconds because account %s failed to authenticate '%u' times",
GetRemoteIpAddress().c_str(), GetRemotePort(), WrongPassBanTime, _login.c_str(), failed_logins);
}
}
}
}
}
return true;
}
bool AuthSession::_HandleReconnectChallenge()
{
TC_LOG_DEBUG("server.authserver", "Entering _HandleReconnectChallenge");
sAuthLogonChallenge_C *challenge = (sAuthLogonChallenge_C*)&_readBuffer;
//TC_LOG_DEBUG("server.authserver", "[AuthChallenge] got full packet, %#04x bytes", challenge->size);
TC_LOG_DEBUG("server.authserver", "[AuthChallenge] name(%d): '%s'", challenge->I_len, challenge->I);
_login.assign((const char*)challenge->I, challenge->I_len);
PreparedStatement* stmt = LoginDatabase.GetPreparedStatement(LOGIN_SEL_SESSIONKEY);
stmt->setString(0, _login);
PreparedQueryResult result = LoginDatabase.Query(stmt);
// Stop if the account is not found
if (!result)
{
TC_LOG_ERROR("server.authserver", "'%s:%d' [ERROR] user %s tried to login and we cannot find his session key in the database.",
GetRemoteIpAddress().c_str(), GetRemotePort(), _login.c_str());
return false;
}
// Reinitialize build, expansion and the account securitylevel
_build = challenge->build;
_expversion = uint8(AuthHelper::IsPostBCAcceptedClientBuild(_build) ? POST_BC_EXP_FLAG : (AuthHelper::IsPreBCAcceptedClientBuild(_build) ? PRE_BC_EXP_FLAG : NO_VALID_EXP_FLAG));
_os = (const char*)challenge->os;
if (_os.size() > 4)
return false;
// Restore string order as its byte order is reversed
std::reverse(_os.begin(), _os.end());
Field* fields = result->Fetch();
uint8 secLevel = fields[2].GetUInt8();
_accountSecurityLevel = secLevel <= SEC_ADMINISTRATOR ? AccountTypes(secLevel) : SEC_ADMINISTRATOR;
K.SetHexStr((*result)[0].GetCString());
// Sending response
ByteBuffer pkt;
pkt << uint8(AUTH_RECONNECT_CHALLENGE);
pkt << uint8(0x00);
_reconnectProof.SetRand(16 * 8);
pkt.append(_reconnectProof.AsByteArray(16).get(), 16); // 16 bytes random
pkt << uint64(0x00) << uint64(0x00); // 16 bytes zeros
std::memcpy(_writeBuffer, (char const*)pkt.contents(), pkt.size());
AsyncWrite(pkt.size());
return true;
}
bool AuthSession::_HandleReconnectProof()
{
TC_LOG_DEBUG("server.authserver", "Entering _HandleReconnectProof");
sAuthReconnectProof_C *reconnectProof = (sAuthReconnectProof_C*)&_readBuffer;
if (_login.empty() || !_reconnectProof.GetNumBytes() || !K.GetNumBytes())
return false;
BigNumber t1;
t1.SetBinary(reconnectProof->R1, 16);
SHA1Hash sha;
sha.Initialize();
sha.UpdateData(_login);
sha.UpdateBigNumbers(&t1, &_reconnectProof, &K, NULL);
sha.Finalize();
if (!memcmp(sha.GetDigest(), reconnectProof->R2, SHA_DIGEST_LENGTH))
{
// Sending response
ByteBuffer pkt;
pkt << uint8(AUTH_RECONNECT_PROOF);
pkt << uint8(0x00);
pkt << uint16(0x00); // 2 bytes zeros
std::memcpy(_writeBuffer, (char const*)pkt.contents(), pkt.size());
AsyncWrite(pkt.size());
_isAuthenticated = true;
return true;
}
else
{
TC_LOG_ERROR("server.authserver", "'%s:%d' [ERROR] user %s tried to login, but session is invalid.", GetRemoteIpAddress().c_str(),
GetRemotePort(), _login.c_str());
return false;
}
}
tcp::endpoint const GetAddressForClient(Realm const& realm, ip::address const& clientAddr)
{
ip::address realmIp;
// Attempt to send best address for client
if (clientAddr.is_loopback())
{
// Try guessing if realm is also connected locally
if (realm.LocalAddress.is_loopback() || realm.ExternalAddress.is_loopback())
realmIp = clientAddr;
else
{
// Assume that user connecting from the machine that authserver is located on
// has all realms available in his local network
realmIp = realm.LocalAddress;
}
}
else
{
if (clientAddr.is_v4() &&
(clientAddr.to_v4().to_ulong() & realm.LocalSubnetMask.to_v4().to_ulong()) ==
(realm.LocalAddress.to_v4().to_ulong() & realm.LocalSubnetMask.to_v4().to_ulong()))
{
realmIp = realm.LocalAddress;
}
else
realmIp = realm.ExternalAddress;
}
tcp::endpoint endpoint(realmIp, realm.port);
// Return external IP
return endpoint;
}
bool AuthSession::_HandleRealmList()
{
TC_LOG_DEBUG("server.authserver", "Entering _HandleRealmList");
// Get the user id (else close the connection)
// No SQL injection (prepared statement)
PreparedStatement* stmt = LoginDatabase.GetPreparedStatement(LOGIN_SEL_ACCOUNT_ID_BY_NAME);
stmt->setString(0, _login);
PreparedQueryResult result = LoginDatabase.Query(stmt);
if (!result)
{
TC_LOG_ERROR("server.authserver", "'%s:%d' [ERROR] user %s tried to login but we cannot find him in the database.", GetRemoteIpAddress().c_str(),
GetRemotePort(), _login.c_str());
return false;
}
Field* fields = result->Fetch();
uint32 id = fields[0].GetUInt32();
// Update realm list if need
sRealmList.UpdateIfNeed();
// Circle through realms in the RealmList and construct the return packet (including # of user characters in each realm)
ByteBuffer pkt;
size_t RealmListSize = 0;
for (RealmList::RealmMap::const_iterator i = sRealmList.begin(); i != sRealmList.end(); ++i)
{
const Realm &realm = i->second;
// don't work with realms which not compatible with the client
bool okBuild = ((_expversion & POST_BC_EXP_FLAG) && realm.gamebuild == _build) || ((_expversion & PRE_BC_EXP_FLAG) && !AuthHelper::IsPreBCAcceptedClientBuild(realm.gamebuild));
// No SQL injection. id of realm is controlled by the database.
uint32 flag = realm.flag;
RealmBuildInfo const* buildInfo = AuthHelper::GetBuildInfo(realm.gamebuild);
if (!okBuild)
{
if (!buildInfo)
continue;
flag |= REALM_FLAG_OFFLINE | REALM_FLAG_SPECIFYBUILD; // tell the client what build the realm is for
}
if (!buildInfo)
flag &= ~REALM_FLAG_SPECIFYBUILD;
std::string name = i->first;
if (_expversion & PRE_BC_EXP_FLAG && flag & REALM_FLAG_SPECIFYBUILD)
{
std::ostringstream ss;
ss << name << " (" << buildInfo->MajorVersion << '.' << buildInfo->MinorVersion << '.' << buildInfo->BugfixVersion << ')';
name = ss.str();
}
uint8 lock = (realm.allowedSecurityLevel > _accountSecurityLevel) ? 1 : 0;
uint8 AmountOfCharacters = 0;
stmt = LoginDatabase.GetPreparedStatement(LOGIN_SEL_NUM_CHARS_ON_REALM);
stmt->setUInt32(0, realm.m_ID);
stmt->setUInt32(1, id);
result = LoginDatabase.Query(stmt);
if (result)
AmountOfCharacters = (*result)[0].GetUInt8();
pkt << realm.icon; // realm type
if (_expversion & POST_BC_EXP_FLAG) // only 2.x and 3.x clients
pkt << lock; // if 1, then realm locked
pkt << uint8(flag); // RealmFlags
pkt << name;
pkt << boost::lexical_cast<std::string>(GetAddressForClient(realm, _socket.remote_endpoint().address()));
pkt << realm.populationLevel;
pkt << AmountOfCharacters;
pkt << realm.timezone; // realm category
if (_expversion & POST_BC_EXP_FLAG) // 2.x and 3.x clients
pkt << uint8(0x2C); // unk, may be realm number/id?
else
pkt << uint8(0x0); // 1.12.1 and 1.12.2 clients
if (_expversion & POST_BC_EXP_FLAG && flag & REALM_FLAG_SPECIFYBUILD)
{
pkt << uint8(buildInfo->MajorVersion);
pkt << uint8(buildInfo->MinorVersion);
pkt << uint8(buildInfo->BugfixVersion);
pkt << uint16(buildInfo->Build);
}
++RealmListSize;
}
if (_expversion & POST_BC_EXP_FLAG) // 2.x and 3.x clients
{
pkt << uint8(0x10);
pkt << uint8(0x00);
}
else // 1.12.1 and 1.12.2 clients
{
pkt << uint8(0x00);
pkt << uint8(0x02);
}
// make a ByteBuffer which stores the RealmList's size
ByteBuffer RealmListSizeBuffer;
RealmListSizeBuffer << uint32(0);
if (_expversion & POST_BC_EXP_FLAG) // only 2.x and 3.x clients
RealmListSizeBuffer << uint16(RealmListSize);
else
RealmListSizeBuffer << uint32(RealmListSize);
ByteBuffer hdr;
hdr << uint8(REALM_LIST);
hdr << uint16(pkt.size() + RealmListSizeBuffer.size());
hdr.append(RealmListSizeBuffer); // append RealmList's size buffer
hdr.append(pkt); // append realms in the realmlist
std::memcpy(_writeBuffer, (char const*)hdr.contents(), hdr.size());
AsyncWrite(hdr.size());
return true;
}
// Make the SRP6 calculation from hash in dB
void AuthSession::SetVSFields(const std::string& rI)
{
s.SetRand(BYTE_SIZE * 8);
BigNumber I;
I.SetHexStr(rI.c_str());
// In case of leading zeros in the rI hash, restore them
uint8 mDigest[SHA_DIGEST_LENGTH];
memset(mDigest, 0, SHA_DIGEST_LENGTH);
if (I.GetNumBytes() <= SHA_DIGEST_LENGTH)
memcpy(mDigest, I.AsByteArray().get(), I.GetNumBytes());
std::reverse(mDigest, mDigest + SHA_DIGEST_LENGTH);
SHA1Hash sha;
sha.UpdateData(s.AsByteArray().get(), s.GetNumBytes());
sha.UpdateData(mDigest, SHA_DIGEST_LENGTH);
sha.Finalize();
BigNumber x;
x.SetBinary(sha.GetDigest(), sha.GetLength());
v = g.ModExp(x, N);
// No SQL injection (username escaped)
char *v_hex, *s_hex;
v_hex = v.AsHexStr();
s_hex = s.AsHexStr();
PreparedStatement* stmt = LoginDatabase.GetPreparedStatement(LOGIN_UPD_VS);
stmt->setString(0, v_hex);
stmt->setString(1, s_hex);
stmt->setString(2, _login);
LoginDatabase.Execute(stmt);
OPENSSL_free(v_hex);
OPENSSL_free(s_hex);
}
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