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Implement FDB Checksum

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- Added config option `check_fdb`
- Added check in WorldServer.cpp
- Added raw MD5 function in MD5.cpp and MD5.h
This commit is contained in:
Jett
2021-12-12 03:41:11 +00:00
parent 180db5dea5
commit 49c1cb3aff
4 changed files with 36 additions and 0 deletions
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24
dWorldServer/WorldServer.cpp
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@@ -838,7 +838,31 @@ void HandlePacket(Packet* packet) {
case MSG_WORLD_CLIENT_VALIDATION: {
std::string username = PacketUtils::ReadString(0x08, packet, true);
std::string sessionKey = PacketUtils::ReadString(74, packet, true);
std::string fdbChecksum = PacketUtils::ReadString(packet->length - 33, packet, false);
if (bool(std::stoi(Game::config->GetValue("check_fdb")))) {
std::ifstream fileStream;
fileStream.open ("res/CDServer.fdb", std::ios::binary | std::ios::in);
fileStream.seekg (0, std::ios::end);
uint64_t fileStreamLength = fileStream.tellg();
fileStream.seekg (0, std::ios::beg);
char * fileStreamData = new char[fileStreamLength + 1];
fileStream.read(fileStreamData, fileStreamLength);
*(fileStreamData + (fileStreamLength + 1)) = 0x00; // null terminate the string
MD5 md5 = MD5(fileStreamData, fileStreamLength + 1);
std::string ourFdbChecksum = md5.hexdigest();
Game::logger->Log("WorldServer", "Got client checksum %s and we have server checksum %s. \n", fdbChecksum.c_str(), ourFdbChecksum.c_str());
if (fdbChecksum != ourFdbChecksum) {
Game::logger->Log("WorldServer", "Client checksum does not match server checksum.\n");
Game::server->Disconnect(packet->systemAddress, SERVER_DISCON_KICK);
return;
}
}
//Request the session info from Master:
CBITSTREAM;
PacketUtils::WriteHeader(bitStream, MASTER, MSG_MASTER_REQUEST_SESSION_KEY);