/// Logon Challenge command handler
bool AuthSocket::_HandleLogonChallenge()
{
DEBUG_LOG("Entering _HandleLogonChallenge");
if (ibuf.GetLength() < sizeof(sAuthLogonChallenge_C))
return false;
///- Read the first 4 bytes (header) to get the length of the remaining of the packet
std::vector<uint8> buf;
buf.resize(4);
ibuf.Read((char *)&buf[0], 4);
uint16 remaining = ((sAuthLogonChallenge_C *)&buf[0])->size;
DEBUG_LOG("[AuthChallenge] got header, body is %#04x bytes", remaining);
if ((remaining < sizeof(sAuthLogonChallenge_C) - buf.size()) || (ibuf.GetLength() < remaining))
return false;
//No big fear of memory outage (size is int16, i.e. < 65536)
buf.resize(remaining + buf.size() + 1);
buf[buf.size() - 1] = 0;
sAuthLogonChallenge_C *ch = (sAuthLogonChallenge_C*)&buf[0];
///- Read the remaining of the packet
ibuf.Read((char *)&buf[4], remaining);
DEBUG_LOG("[AuthChallenge] got full packet, %#04x bytes", ch->size);
DEBUG_LOG("[AuthChallenge] name(%d): '%s'", ch->I_len, ch->I);
ByteBuffer pkt;
_login = (const char*)ch->I;
//Escape the user login to avoid further SQL injection
//Memory will be freed on AuthSocket object destruction
_safelogin=_login;
dbRealmServer.escape_string(_safelogin);
///- Check if the client has one of the expected version numbers
bool valid_version=false;
int accepted_versions[]=EXPECTED_MANGOS_CLIENT_BUILD;
for(int i=0;accepted_versions[i];i++)
if(ch->build==accepted_versions[i])
{
valid_version=true;
break;
}
/// <ul><li> if this is a valid version
if(valid_version)
{
pkt << (uint8) AUTH_LOGON_CHALLENGE;
pkt << (uint8) 0x00;
///- Verify that this IP is not in the ip_banned table
// No SQL injection possible (paste the IP address as passed by the socket)
dbRealmServer.Execute("DELETE FROM `ip_banned` WHERE `unbandate`<=UNIX_TIMESTAMP() AND `unbandate`<>`bandate`");
QueryResult *result = dbRealmServer.PQuery( "SELECT * FROM `ip_banned` WHERE `ip` = '%s'",GetRemoteAddress().c_str());
if(result)
{
pkt << (uint8)REALM_AUTH_ACCOUNT_BANNED;
sLog.outBasic("[AuthChallenge] Banned ip %s tries to login!",GetRemoteAddress().c_str ());
delete result;
}
else
{
///- Get the account details from the account table
// No SQL injection (escaped user name)
QueryResult *result = dbRealmServer.PQuery("SELECT `I`,`id`,`locked`,`last_ip`,`online` FROM `account` WHERE `username` = '%s'",_safelogin.c_str ());
if( result )
{
///- If the IP is 'locked', check that the player comes indeed from the correct IP address
bool locked = false;
if((*result)[2].GetUInt8() == 1) // if ip is locked
{
DEBUG_LOG("[AuthChallenge] Account '%s' is locked to IP - '%s'", _login.c_str(), (*result)[3].GetString());
DEBUG_LOG("[AuthChallenge] Player address is '%s'", GetRemoteAddress().c_str());
if ( strcmp((*result)[3].GetString(),GetRemoteAddress().c_str()) )
{
DEBUG_LOG("[AuthChallenge] Account IP differs");
pkt << (uint8) REALM_AUTH_ACCOUNT_FREEZED;
locked=true;
}
else
{
DEBUG_LOG("[AuthChallenge] Account IP matches");
}
}
else
{
DEBUG_LOG("[AuthChallenge] Account '%s' is not locked to ip", _login.c_str());
}
if (!locked)
{
//set expired bans to inactive
dbRealmServer.Execute("UPDATE `account_banned` SET `active` = 0 WHERE `unbandate`<=UNIX_TIMESTAMP() AND `unbandate`<>`bandate`");
///- If the account is banned, reject the logon attempt
QueryResult *banresult = dbRealmServer.PQuery("SELECT `bandate`,`unbandate` FROM `account_banned` WHERE `id` = %u AND `active` = 1", (*result)[1].GetUInt32());
if(banresult)
{
if((*banresult)[0].GetUInt64() == (*banresult)[1].GetUInt64())
{
pkt << (uint8) REALM_AUTH_ACCOUNT_BANNED;
sLog.outBasic("[AuthChallenge] Banned account %s tries to login!",_login.c_str ());
}
else
{
pkt << (uint8) REALM_AUTH_ACCOUNT_FREEZED;
sLog.outBasic("[AuthChallenge] Temporarily banned account %s tries to login!",_login.c_str ());
}
delete banresult;
}
else
{
///- Get the password from the account table, upper it, and make the SRP6 calculation
std::string rI = (*result)[0].GetCppString();
_SetVSFields(rI);
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
pkt << (uint8)REALM_AUTH_SUCCESS;
pkt.append(B.AsByteArray(), 32);
pkt << (uint8)1;
pkt.append(g.AsByteArray(), 1);
pkt << (uint8)32;
pkt.append(N.AsByteArray(), 32);
pkt.append(s.AsByteArray(), s.GetNumBytes());
pkt.append(unk3.AsByteArray(), 16);
pkt << (uint8)0; // Added in 1.12.x client branch
}
}
delete result;
}
else //no account
{
pkt<< (uint8) REALM_AUTH_NO_MATCH;
}
}
} //valid version
else
///<li> else
{
///- Check if we have the apropriate patch on the disk
char tmp[64];
// No buffer overflow (fixed length of arguments)
sprintf(tmp,"./patches/%d%c%c%c%c.mpq",ch->build,ch->country[3],
ch->country[2],ch->country[1],ch->country[0]);
// This will be closed at the destruction of the AuthSocket (client deconnection)
FILE *pFile=fopen(tmp,"rb");
if(!pFile)
{
pkt << (uint8) AUTH_LOGON_CHALLENGE;
pkt << (uint8) 0x00;
pkt << (uint8) REALM_AUTH_WRONG_BUILD_NUMBER;
DEBUG_LOG("[AuthChallenge] %u is not a valid client version!", ch->build);
DEBUG_LOG("[AuthChallenge] Patch %s not found",tmp);
}else
{ //have patch
pPatch=pFile;
XFER_INIT xferh;
///- Get the MD5 hash of the patch file (get it from preloaded Patcher cache or calculate it)
if(PatchesCache.GetHash(tmp,(uint8*)&xferh.md5))
{
DEBUG_LOG("\n[AuthChallenge] Found precached patch info for patch %s",tmp);
}
else
{ //calculate patch md5
printf("\n[AuthChallenge] Patch info for %s was not cached.",tmp);
PatchesCache.LoadPatchMD5(tmp);
PatchesCache.GetHash(tmp,(uint8*)&xferh.md5);
}
///- Send a packet to the client with the file length and MD5 hash
uint8 data[2]={AUTH_LOGON_PROOF,REALM_AUTH_UPDATE_CLIENT};
SendBuf((const char*)data,sizeof(data));
memcpy(&xferh,"0\x05Patch",7);
xferh.cmd=XFER_INITIATE;
fseek(pPatch,0,SEEK_END);
xferh.file_size=ftell(pPatch);
SendBuf((const char*)&xferh,sizeof(xferh));
return true;
}
}
/// </ul>
SendBuf((char *)pkt.contents(), pkt.size());
return true;
}
