// Logon Proof command handler
bool AuthSession::HandleLogonProof()
{
TC_LOG_DEBUG("server.authserver", "Entering _HandleLogonProof");
if (_sentProof)
return false;
_sentProof = true;
// Read the packet
sAuthLogonProof_C *logonProof = reinterpret_cast<sAuthLogonProof_C*>(GetReadBuffer().GetReadPointer());
// 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(_accountInfo.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(), sha.GetLength());
// Check if SRP6 results match (password is correct), else send an error
if (!memcmp(M.AsByteArray(sha.GetLength()).get(), logonProof->M1, 20))
{
TC_LOG_DEBUG("server.authserver", "'%s:%d' User '%s' successfully authenticated", GetRemoteIpAddress().to_string().c_str(), GetRemotePort(), _accountInfo.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
PreparedStatement *stmt = LoginDatabase.GetPreparedStatement(LOGIN_UPD_LOGONPROOF);
stmt->setString(0, K.AsHexStr());
stmt->setString(1, GetRemoteIpAddress().to_string().c_str());
stmt->setUInt32(2, GetLocaleByName(_localizationName));
stmt->setString(3, _os);
stmt->setString(4, _accountInfo.Login);
LoginDatabase.DirectExecute(stmt);
// 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())
{
uint8 size = *(GetReadBuffer().GetReadPointer() + sizeof(sAuthLogonProof_C));
std::string token(reinterpret_cast<char*>(GetReadBuffer().GetReadPointer() + sizeof(sAuthLogonProof_C) + sizeof(size)), size);
GetReadBuffer().ReadCompleted(sizeof(size) + size);
uint32 validToken = TOTP::GenerateToken(_tokenKey.c_str());
_tokenKey.clear();
uint32 incomingToken = atoi(token.c_str());
if (validToken != incomingToken)
{
ByteBuffer packet;
packet << uint8(AUTH_LOGON_PROOF);
packet << uint8(WOW_FAIL_UNKNOWN_ACCOUNT);
packet << uint8(3);
packet << uint8(0);
SendPacket(packet);
return true;
}
}
ByteBuffer packet;
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.AccountFlags = 0x00800000; // 0x01 = GM, 0x08 = Trial, 0x00800000 = Pro pass (arena tournament)
proof.SurveyId = 0;
proof.unk3 = 0;
packet.resize(sizeof(proof));
std::memcpy(packet.contents(), &proof, sizeof(proof));
}
else
{
sAuthLogonProof_S_Old proof;
memcpy(proof.M2, sha.GetDigest(), 20);
proof.cmd = AUTH_LOGON_PROOF;
proof.error = 0;
proof.unk2 = 0x00;
packet.resize(sizeof(proof));
std::memcpy(packet.contents(), &proof, sizeof(proof));
}
SendPacket(packet);
_status = STATUS_AUTHED;
}
else
{
ByteBuffer packet;
packet << uint8(AUTH_LOGON_PROOF);
packet << uint8(WOW_FAIL_UNKNOWN_ACCOUNT);
packet << uint8(3);
packet << uint8(0);
SendPacket(packet);
TC_LOG_INFO("server.authserver.hack", "'%s:%d' [AuthChallenge] account %s tried to login with invalid password!",
GetRemoteIpAddress().to_string().c_str(), GetRemotePort(), _accountInfo.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("WrongPass.Logging", false))
{
PreparedStatement* logstmt = LoginDatabase.GetPreparedStatement(LOGIN_INS_FALP_IP_LOGGING);
logstmt->setUInt32(0, _accountInfo.Id);
logstmt->setString(1, GetRemoteIpAddress().to_string());
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, _accountInfo.Login);
LoginDatabase.Execute(stmt);
if (++_accountInfo.FailedLogins >= MaxWrongPassCount)
{
uint32 WrongPassBanTime = sConfigMgr->GetIntDefault("WrongPass.BanTime", 600);
bool WrongPassBanType = sConfigMgr->GetBoolDefault("WrongPass.BanType", false);
if (WrongPassBanType)
{
stmt = LoginDatabase.GetPreparedStatement(LOGIN_INS_ACCOUNT_AUTO_BANNED);
stmt->setUInt32(0, _accountInfo.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().to_string().c_str(), GetRemotePort(), _accountInfo.Login.c_str(), WrongPassBanTime, _accountInfo.FailedLogins);
}
else
{
stmt = LoginDatabase.GetPreparedStatement(LOGIN_INS_IP_AUTO_BANNED);
stmt->setString(0, GetRemoteIpAddress().to_string());
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().to_string().c_str(), GetRemotePort(), WrongPassBanTime, _accountInfo.Login.c_str(), _accountInfo.FailedLogins);
}
}
}
}
return true;
}
