302 lines
7.4 KiB
C++
302 lines
7.4 KiB
C++
#include <std_include.hpp>
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#include "loader/component_loader.hpp"
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#include "game/game.hpp"
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#include "steam/steam.hpp"
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#include "auth.hpp"
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#include "command.hpp"
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#include "console.hpp"
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#include "network.hpp"
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#include <utils/cryptography.hpp>
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#include <utils/hook.hpp>
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#include <utils/info_string.hpp>
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#include <utils/io.hpp>
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#include <utils/properties.hpp>
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#include <utils/smbios.hpp>
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#include <utils/string.hpp>
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namespace auth
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{
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namespace
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{
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std::string get_hdd_serial()
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{
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DWORD serial{};
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if (!GetVolumeInformationA("C:\\", nullptr, 0, &serial, nullptr, nullptr, nullptr, 0))
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{
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return {};
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}
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return utils::string::va("%08X", serial);
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}
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std::string get_hw_profile_guid()
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{
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auto hw_profile_path = (utils::properties::get_appdata_path() / "iw6-guid.dat").generic_string();
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if (utils::io::file_exists(hw_profile_path))
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{
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// Migration
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utils::io::remove_file(hw_profile_path);
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}
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HW_PROFILE_INFO info;
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if (!GetCurrentHwProfileA(&info))
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{
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return {};
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}
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auto hw_profile_info = std::string{ info.szHwProfileGuid, sizeof(info.szHwProfileGuid) };
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return hw_profile_info;
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}
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std::string get_protected_data()
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{
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std::string input = "AlterWare-IW6-Auth";
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DATA_BLOB data_in{}, data_out{};
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data_in.pbData = reinterpret_cast<uint8_t*>(input.data());
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data_in.cbData = static_cast<DWORD>(input.size());
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if (CryptProtectData(&data_in, nullptr, nullptr, nullptr, nullptr, CRYPTPROTECT_LOCAL_MACHINE, &data_out) != TRUE)
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{
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return {};
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}
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const auto size = std::min<DWORD>(data_out.cbData, 52);
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std::string result{ reinterpret_cast<char*>(data_out.pbData), size };
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LocalFree(data_out.pbData);
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return result;
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}
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std::string get_key_entropy()
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{
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std::string entropy{};
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entropy.append(utils::smbios::get_uuid());
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entropy.append(get_hw_profile_guid());
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entropy.append(get_protected_data());
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entropy.append(get_hdd_serial());
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if (entropy.empty())
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{
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entropy.resize(32);
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utils::cryptography::random::get_data(entropy.data(), entropy.size());
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}
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return entropy;
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}
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bool load_key(utils::cryptography::ecc::key& key)
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{
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std::string data{};
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auto key_path = (utils::properties::get_appdata_path() / "iw6-private.key").generic_string();
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if (!utils::io::read_file(key_path, &data))
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{
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return false;
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}
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key.deserialize(data);
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if (!key.is_valid())
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{
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console::error("Loaded key is invalid!\n");
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return false;
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}
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return true;
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}
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utils::cryptography::ecc::key generate_key()
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{
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auto key = utils::cryptography::ecc::generate_key(512, get_key_entropy());
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if (!key.is_valid())
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{
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throw std::runtime_error("Failed to generate cryptographic key!");
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}
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auto key_path = (utils::properties::get_appdata_path() / "iw6-private.key").generic_string();
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if (!utils::io::write_file(key_path, key.serialize()))
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{
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console::error("Failed to write cryptographic key!\n");
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}
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console::info("Generated cryptographic key: %llX\n", key.get_hash());
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return key;
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}
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utils::cryptography::ecc::key load_or_generate_key()
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{
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utils::cryptography::ecc::key key{};
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if (load_key(key))
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{
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console::info("Loaded cryptographic key: %llX\n", key.get_hash());
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return key;
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}
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return generate_key();
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}
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utils::cryptography::ecc::key get_key_internal()
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{
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auto key = load_or_generate_key();
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auto key_path = (utils::properties::get_appdata_path() / "iw6-public.key").generic_string();
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if (!utils::io::write_file(key_path, key.get_public_key()))
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{
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console::error("Failed to write public key!\n");
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}
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return key;
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}
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const utils::cryptography::ecc::key& get_key()
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{
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static auto key = get_key_internal();
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return key;
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}
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int send_connect_data_stub(game::netsrc_t sock, game::netadr_s* adr, const char* format, const int len)
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{
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std::string connect_string(format, len);
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game::SV_Cmd_TokenizeString(connect_string.data());
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const auto _0 = gsl::finally([]()
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{
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game::SV_Cmd_EndTokenizedString();
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});
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const command::params_sv params;
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if (params.size() < 3)
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{
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return false;
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}
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const utils::info_string info_string{std::string{params[2]}};
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const auto challenge = info_string.get("challenge");
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connect_string.clear();
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connect_string.append(params[0]);
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connect_string.append(" ");
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connect_string.append(params[1]);
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connect_string.append(" ");
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connect_string.append("\"" + info_string.build() + "\"");
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proto::network::connect_info info;
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info.set_publickey(get_key().get_public_key());
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info.set_signature(utils::cryptography::ecc::sign_message(get_key(), challenge));
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info.set_infostring(connect_string);
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network::send(*adr, "connect", info.SerializeAsString());
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return true;
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}
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void direct_connect(game::netadr_s* from, game::msg_t* msg)
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{
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const auto offset = sizeof("connect") + 4;
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proto::network::connect_info info;
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if (msg->cursize < offset || !info.ParseFromArray(msg->data + offset, msg->cursize - offset))
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{
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network::send(*from, "error", "Invalid connect data!", '\n');
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return;
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}
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game::SV_Cmd_EndTokenizedString();
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game::SV_Cmd_TokenizeString(info.infostring().data());
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const command::params_sv params;
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if (params.size() < 3)
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{
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network::send(*from, "error", "Invalid connect string!", '\n');
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return;
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}
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const utils::info_string info_string{std::string{params[2]}};
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const auto steam_id = info_string.get("xuid");
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const auto challenge = info_string.get("challenge");
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if (steam_id.empty() || challenge.empty())
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{
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network::send(*from, "error", "Invalid connect data!", '\n');
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return;
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}
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utils::cryptography::ecc::key key;
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key.set(info.publickey());
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const auto xuid = std::strtoull(steam_id.data(), nullptr, 16);
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if (xuid != key.get_hash())
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{
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network::send(*from, "error", "XUID doesn't match the certificate!", '\n');
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return;
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}
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if (!key.is_valid() || !utils::cryptography::ecc::verify_message(key, challenge, info.signature()))
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{
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network::send(*from, "error", "Challenge signature was invalid!", '\n');
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return;
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}
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game::SV_DirectConnect(from);
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}
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void* get_direct_connect_stub()
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{
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return utils::hook::assemble([](utils::hook::assembler& a)
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{
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a.lea(rcx, qword_ptr(rsp, 0x20));
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a.movaps(xmmword_ptr(rsp, 0x20), xmm0);
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a.pushad64();
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a.mov(rdx, rsi);
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a.call_aligned(direct_connect);
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a.popad64();
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a.jmp(0x140479757);
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});
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}
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}
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uint64_t get_guid()
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{
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if (game::environment::is_dedi())
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{
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return 0x110000100000000 | (::utils::cryptography::random::get_integer() & ~0x80000000);
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}
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return get_key().get_hash();
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}
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class component final : public component_interface
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{
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public:
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void post_unpack() override
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{
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// Patch steam id bit check
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if (game::environment::is_sp())
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{
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utils::hook::jump(0x1404BF3F0, 0x1404BF446);
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utils::hook::jump(0x1404C02AF, 0x1404C02F0);
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utils::hook::jump(0x1404C07F4, 0x1404C0842);
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}
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else
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{
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utils::hook::jump(0x140585410, 0x140585466);
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utils::hook::jump(0x140142252, 0x140142293);
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utils::hook::jump(0x140142334, 0x140142389);
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utils::hook::jump(0x1405864EF, 0x140586530);
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utils::hook::jump(0x140586A80, 0x140586AC6);
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utils::hook::jump(0x140479636, get_direct_connect_stub(), true);
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utils::hook::call(0x1402C4F8E, send_connect_data_stub);
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}
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command::add("guid", []() -> void
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{
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console::info("Your guid: %llX\n", steam::SteamUser()->GetSteamID().bits);
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});
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}
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};
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}
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REGISTER_COMPONENT(auth::component)
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