t8-mod/source/proxy-dll/demonware/servers/lobby_server.cpp

#include <std_include.hpp>
#include "lobby_server.hpp"

#include "../services.hpp"
#include "../keys.hpp"

#include <utils/cryptography.hpp>

namespace demonware
{
	lobby_server::lobby_server(std::string name) : tcp_server(std::move(name))
	{
		this->register_service<bdStats>();
		this->register_service<bdProfiles>();
		this->register_service<bdTitleUtilities>();
		this->register_service<bdKeyArchive>();
		this->register_service<bdBandwidthTest>();
		this->register_service<bdCounter>();
		this->register_service<bdDML>();
		this->register_service<bdGroup>();
		this->register_service<bdAnticheat>();
		this->register_service<bdTags>();
		this->register_service<bdPooledStorage>();
		this->register_service<bdEventLog>();
		this->register_service<bdRichPresence>();
		this->register_service<bdMarketplace>();
		this->register_service<bdPublisherVariables>();
		this->register_service<bdMarketingComms>();
		this->register_service<bdUNK125>();
		this->register_service<bdObjectStore>();
		this->register_service<bdLootGeneration>();
	};

	void lobby_server::send_reply(reply* data)
	{
		if (!data) return;
		this->send(data->data());
	}

	void lobby_server::handle(const std::string& packet)
	{
		byte_buffer buffer(packet);
		buffer.set_use_data_types(false);

		try
		{
			while (buffer.has_more_data())
			{
				int size;
				buffer.read_int32(&size);

				if (size <= 0)
				{
					const std::string zero("\x00\x00\x00\x00", 4);
					raw_reply reply(zero);
					this->send_reply(&reply);
					return;
				}
				else if (size == 0xC8)
				{
#ifndef NDEBUG
					logger::write(logger::LOG_TYPE_DEBUG, "[DW]: [lobby]: received client_header_ack.");
#endif

					int c8;
					buffer.read_int32(&c8);
					std::string packet_1 = buffer.get_remaining();
					demonware::queue_packet_to_hash(packet_1);

					/*      msgType[BYTE]    serverSelectedProto[DWORD]    cypher210ConnID[QWORD]    serverNonce[QWORD]    */
					/*          0x81(129)                     0xD2(210)        0x3713371337133713    0x3713371337133713    */

					const std::string packet_2(
						"\x16\x00\x00\x00\xab\x81\xd2\x00\x00\x00\x13\x37\x13\x37\x13\x37\x13\x37\x13\x37\x13\x37\x13\x37\x13\x37",
						26);
					demonware::queue_packet_to_hash(packet_2);

					raw_reply reply(packet_2);
					this->send_reply(&reply);
#ifndef NDEBUG
					logger::write(logger::LOG_TYPE_DEBUG, "[DW]: [lobby]: sending server_header_ack.");
#endif
					return;
				}

				if (buffer.size() < size_t(size)) return;

				uint8_t check_ab;
				buffer.read_ubyte(&check_ab);
				if (check_ab == 0xAB)
				{
					uint8_t type;
					buffer.read_ubyte(&type);

					if (type == 0x82)
					{
#ifndef NDEBUG
						logger::write(logger::LOG_TYPE_DEBUG, "[DW]: [lobby]: received client_auth.");
#endif
						std::string packet_3(packet.data(), packet.size() - 8); // this 8 are client hash check?

						demonware::queue_packet_to_hash(packet_3);
						demonware::derive_keys_iw8();

						char buff[14] = "\x0A\x00\x00\x00\xAB\x83";
						std::memcpy(&buff[6], demonware::get_response_id().data(), 8);
						std::string response(buff, 14);

						raw_reply reply(response);
						this->send_reply(&reply);

#ifndef NDEBUG
						logger::write(logger::LOG_TYPE_DEBUG, "[DW]: [lobby]: sending server_auth_done.");
#endif
						return;
					}
					else if (type == 0x85)
					{
						uint32_t msg_count;
						buffer.read_uint32(&msg_count);

						char seed[16];
						buffer.read(16, &seed);

						std::string enc = buffer.get_remaining();

						char hash[8];
						std::memcpy(hash, &(enc.data()[enc.size() - 8]), 8);

						std::string dec = utils::cryptography::aes::decrypt(
							std::string(enc.data(), enc.size() - 8), std::string(seed, 16),
							demonware::get_decrypt_key());

						byte_buffer serv(dec);
						serv.set_use_data_types(false);

						uint32_t serv_size;
						serv.read_uint32(&serv_size);

						uint8_t magic; // 0x86
						serv.read_ubyte(&magic);

						uint8_t service_id;
						serv.read_ubyte(&service_id);

						this->call_service(service_id, serv.get_remaining());

						return;
					}
				}

				logger::write(logger::LOG_TYPE_DEBUG, "[DW]: [lobby]: ERROR! received unk message.");
				return;
			}
		}
		catch (...)
		{
		}
	}

	void lobby_server::call_service(const uint8_t id, const std::string& data)
	{
		const auto& it = this->services_.find(id);

		if (it != this->services_.end())
		{
			it->second->exec_task(this, data);
		}
		else
		{
			logger::write(logger::LOG_TYPE_DEBUG, "[DW]: [lobby]: missing service '%s'", utils::string::va("%d", id));

			// return no error
			byte_buffer buffer(data);
			uint8_t task_id;
			buffer.read_ubyte(&task_id);

			this->create_reply(task_id)->send();
		}
	}
}