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gbe_fork/dll/base.cpp

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/* Copyright (C) 2019 Mr Goldberg
This file is part of the Goldberg Emulator
The Goldberg Emulator is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 3 of the License, or (at your option) any later version.
The Goldberg Emulator is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the Goldberg Emulator; if not, see
<http://www.gnu.org/licenses/>. */
#include "dll/base.h"
#ifdef __WINDOWS__
void randombytes(char *buf, size_t size)
{
// NT_SUCCESS is: return value >= 0, including Ntdef.h causes so many errors
while (BCryptGenRandom(NULL, (PUCHAR) buf, (ULONG) size, BCRYPT_USE_SYSTEM_PREFERRED_RNG) < 0) {
PRINT_DEBUG("ERROR");
Sleep(100);
}
}
std::string get_env_variable(const std::string &name)
{
wchar_t env_variable[1024]{};
DWORD ret = GetEnvironmentVariableW(utf8_decode(name).c_str(), env_variable, _countof(env_variable));
if (ret <= 0 || !env_variable[0]) {
return std::string();
}
env_variable[ret] = 0;
return utf8_encode(env_variable);
}
bool set_env_variable(const std::string &name, const std::string &value)
{
return SetEnvironmentVariableW(utf8_decode(name).c_str(), utf8_decode(value).c_str());
}
#else
static int fd = -1;
void randombytes(char *buf, size_t size)
{
int i;
if (fd == -1) {
for (;;) {
fd = open("/dev/urandom",O_RDONLY);
if (fd != -1) break;
sleep(1);
}
}
while (size > 0) {
if (size < 1048576) i = size; else i = 1048576;
i = read(fd,buf,i);
if (i < 1) {
sleep(1);
continue;
}
buf += i;
size -= i;
}
}
std::string get_env_variable(const std::string &name)
{
char *env = getenv(name.c_str());
if (!env) {
return std::string();
}
return std::string(env);
}
bool set_env_variable(const std::string &name, const std::string &value)
{
return setenv(name.c_str(), value.c_str(), 1) == 0;
}
#endif
std::recursive_mutex global_mutex{};
// some arbitrary counter/time for reference
const std::chrono::time_point<std::chrono::high_resolution_clock> startup_counter = std::chrono::high_resolution_clock::now();
const std::chrono::time_point<std::chrono::system_clock> startup_time = std::chrono::system_clock::now();
#ifndef EMU_RELEASE_BUILD
const std::string dbg_log_file = get_full_program_path() + "STEAM_LOG.txt";
#endif
unsigned generate_account_id()
{
int a;
randombytes((char *)&a, sizeof(a));
a = abs(a);
if (!a) ++a;
return a;
}
CSteamID generate_steam_anon_user()
{
return CSteamID(generate_account_id(), k_unSteamUserDefaultInstance, k_EUniversePublic, k_EAccountTypeAnonUser);
}
SteamAPICall_t generate_steam_api_call_id() {
static SteamAPICall_t a;
std::lock_guard<std::recursive_mutex> lock(global_mutex);
randombytes((char *)&a, sizeof(a));
++a;
if (a == 0) ++a;
return a;
}
CSteamID generate_steam_id_user()
{
return CSteamID(generate_account_id(), k_unSteamUserDefaultInstance, k_EUniversePublic, k_EAccountTypeIndividual);
}
CSteamID generate_steam_id_server()
{
return CSteamID(generate_account_id(), k_unSteamUserDefaultInstance, k_EUniversePublic, k_EAccountTypeGameServer);
}
CSteamID generate_steam_id_anonserver()
{
return CSteamID(generate_account_id(), k_unSteamUserDefaultInstance, k_EUniversePublic, k_EAccountTypeAnonGameServer);
}
CSteamID generate_steam_id_lobby()
{
return CSteamID(generate_account_id(), k_EChatInstanceFlagLobby | k_EChatInstanceFlagMMSLobby, k_EUniversePublic, k_EAccountTypeChat);
}
bool check_timedout(std::chrono::high_resolution_clock::time_point old, double timeout)
{
if (timeout == 0.0) return true;
std::chrono::high_resolution_clock::time_point now = std::chrono::high_resolution_clock::now();
if (std::chrono::duration_cast<std::chrono::duration<double>>(now - old).count() > timeout) {
return true;
}
return false;
}
#ifdef __LINUX__
std::string get_lib_path() {
std::string dir = "/proc/self/map_files";
DIR *dp;
int i = 0;
struct dirent *ep;
dp = opendir (dir.c_str());
uintptr_t p = (uintptr_t)&get_lib_path;
if (dp != NULL)
{
while ((ep = readdir (dp))) {
if (memcmp(ep->d_name, ".", 2) != 0 && memcmp(ep->d_name, "..", 3) != 0) {
char *upper = NULL;
uintptr_t lower_bound = strtoull(ep->d_name, &upper, 16);
if (lower_bound) {
++upper;
uintptr_t upper_bound = strtoull(upper, &upper, 16);
if (upper_bound && (lower_bound < p && p < upper_bound)) {
std::string path = dir + PATH_SEPARATOR + ep->d_name;
char link[PATH_MAX] = {};
if (readlink(path.c_str(), link, sizeof(link)) > 0) {
std::string lib_path = link;
(void) closedir (dp);
return link;
}
}
}
i++;
}
}
(void) closedir (dp);
}
return ".";
}
#endif
std::string get_full_lib_path()
{
std::string program_path;
#if defined(__WINDOWS__)
wchar_t DllPath[2048] = {0};
GetModuleFileNameW((HINSTANCE)&__ImageBase, DllPath, _countof(DllPath));
program_path = utf8_encode(DllPath);
#else
program_path = get_lib_path();
#endif
return program_path;
}
std::string get_full_program_path()
{
std::string env_program_path = get_env_variable("SteamAppPath");
if (env_program_path.length()) {
if (env_program_path.back() != PATH_SEPARATOR[0]) {
env_program_path = env_program_path.append(PATH_SEPARATOR);
}
return env_program_path;
}
std::string program_path{};
program_path = get_full_lib_path();
return program_path.substr(0, program_path.rfind(PATH_SEPARATOR)).append(PATH_SEPARATOR);
}
std::string get_current_path()
{
std::string path;
#if defined(STEAM_WIN32)
char *buffer = _getcwd( NULL, 0 );
#else
char *buffer = get_current_dir_name();
#endif
if (buffer) {
path = buffer;
path.append(PATH_SEPARATOR);
free(buffer);
}
return path;
}
std::string canonical_path(std::string path)
{
std::string output;
#if defined(STEAM_WIN32)
wchar_t *buffer = _wfullpath(NULL, utf8_decode(path).c_str(), 0);
if (buffer) {
output = utf8_encode(buffer);
free(buffer);
}
#else
char *buffer = canonicalize_file_name(path.c_str());
if (buffer) {
output = buffer;
free(buffer);
}
#endif
return output;
}
bool file_exists_(std::string full_path)
{
#if defined(STEAM_WIN32)
struct _stat buffer;
if (_wstat(utf8_decode(full_path).c_str(), &buffer) != 0)
return false;
if ( buffer.st_mode & _S_IFDIR)
return false;
#else
struct stat buffer;
if (stat(full_path.c_str(), &buffer) != 0)
return false;
if (S_ISDIR(buffer.st_mode))
return false;
#endif
return true;
}
unsigned int file_size_(std::string full_path)
{
#if defined(STEAM_WIN32)
struct _stat buffer = {};
if (_wstat(utf8_decode(full_path).c_str(), &buffer) != 0) return 0;
#else
struct stat buffer = {};
if (stat (full_path.c_str(), &buffer) != 0) return 0;
#endif
return buffer.st_size;
}
#ifdef EMU_EXPERIMENTAL_BUILD
#ifdef __WINDOWS__
struct ips_test {
uint32_t ip_from;
uint32_t ip_to;
};
static std::vector<struct ips_test> whitelist_ips;
void set_whitelist_ips(uint32_t *from, uint32_t *to, unsigned num_ips)
{
whitelist_ips.clear();
for (unsigned i = 0; i < num_ips; ++i) {
struct ips_test ip_a;
PRINT_DEBUG("from: %hhu.%hhu.%hhu.%hhu", ((unsigned char *)&from[i])[0], ((unsigned char *)&from[i])[1], ((unsigned char *)&from[i])[2], ((unsigned char *)&from[i])[3]);
PRINT_DEBUG("to: %hhu.%hhu.%hhu.%hhu", ((unsigned char *)&to[i])[0], ((unsigned char *)&to[i])[1], ((unsigned char *)&to[i])[2], ((unsigned char *)&to[i])[3]);
ip_a.ip_from = ntohl(from[i]);
ip_a.ip_to = ntohl(to[i]);
if (ip_a.ip_to < ip_a.ip_from) continue;
if ((ip_a.ip_to - ip_a.ip_from) > (1 << 25)) continue;
PRINT_DEBUG("added ip to whitelist");
whitelist_ips.push_back(ip_a);
}
}
static bool is_whitelist_ip(unsigned char *ip)
{
uint32_t ip_temp = 0;
memcpy(&ip_temp, ip, sizeof(ip_temp));
ip_temp = ntohl(ip_temp);
for (auto &i : whitelist_ips) {
if (i.ip_from <= ip_temp && ip_temp <= i.ip_to) {
PRINT_DEBUG("IP IS WHITELISTED %hhu.%hhu.%hhu.%hhu", ip[0], ip[1], ip[2], ip[3]);
return true;
}
}
return false;
}
static bool is_lan_ipv4(unsigned char *ip)
{
PRINT_DEBUG("CHECK LAN IP %hhu.%hhu.%hhu.%hhu", ip[0], ip[1], ip[2], ip[3]);
if (is_whitelist_ip(ip)) return true;
if (ip[0] == 127) return true;
if (ip[0] == 10) return true;
if (ip[0] == 192 && ip[1] == 168) return true;
if (ip[0] == 169 && ip[1] == 254 && ip[2] != 0) return true;
if (ip[0] == 172 && ip[1] >= 16 && ip[1] <= 31) return true;
if ((ip[0] == 100) && ((ip[1] & 0xC0) == 0x40)) return true;
if (ip[0] == 239) return true; //multicast
if (ip[0] == 0) return true; //Current network
if (ip[0] == 192 && (ip[1] == 18 || ip[1] == 19)) return true; //Used for benchmark testing of inter-network communications between two separate subnets.
if (ip[0] >= 224) return true; //ip multicast (224 - 239) future use (240.0.0.0 - 255.255.255.254) broadcast (255.255.255.255)
return false;
}
static bool is_lan_ip(const sockaddr *addr, int namelen)
{
if (!namelen) return false;
if (addr->sa_family == AF_INET) {
struct sockaddr_in *addr_in = (struct sockaddr_in *)addr;
unsigned char ip[4];
memcpy(ip, &addr_in->sin_addr, sizeof(ip));
if (is_lan_ipv4(ip)) return true;
} else if (addr->sa_family == AF_INET6) {
struct sockaddr_in6 *addr_in6 = (struct sockaddr_in6 *)addr;
unsigned char ip[16];
unsigned char zeroes[16] = {};
memcpy(ip, &addr_in6->sin6_addr, sizeof(ip));
PRINT_DEBUG("CHECK LAN IP6 %hhu.%hhu.%hhu.%hhu.%hhu.%hhu.%hhu.%hhu.%hhu.%hhu.%hhu.%hhu.%hhu.%hhu.%hhu.%hhu", ip[0], ip[1], ip[2], ip[3], ip[4], ip[5], ip[6], ip[7], ip[8], ip[9], ip[10], ip[11], ip[12], ip[13], ip[14], ip[15]);
if (((ip[0] == 0xFF) && (ip[1] < 3) && (ip[15] == 1)) ||
((ip[0] == 0xFE) && ((ip[1] & 0xC0) == 0x80))) return true;
if (memcmp(zeroes, ip, sizeof(ip)) == 0) return true;
if (memcmp(zeroes, ip, sizeof(ip) - 1) == 0 && ip[15] == 1) return true;
if (ip[0] == 0xff) return true; //multicast
if (ip[0] == 0xfc) return true; //unique local
if (ip[0] == 0xfd) return true; //unique local
unsigned char ipv4_mapped[12] = {};
ipv4_mapped[10] = 0xFF;
ipv4_mapped[11] = 0xFF;
if (memcmp(ipv4_mapped, ip, sizeof(ipv4_mapped)) == 0) {
if (is_lan_ipv4(ip + 12)) return true;
}
}
PRINT_DEBUG("NOT LAN IP");
return false;
}
int ( WINAPI *Real_SendTo )( SOCKET s, const char *buf, int len, int flags, const sockaddr *to, int tolen) = sendto;
int ( WINAPI *Real_Connect )( SOCKET s, const sockaddr *addr, int namelen ) = connect;
int ( WINAPI *Real_WSAConnect )( SOCKET s, const sockaddr *addr, int namelen, LPWSABUF lpCallerData, LPWSABUF lpCalleeData, LPQOS lpSQOS, LPQOS lpGQOS) = WSAConnect;
static int WINAPI Mine_SendTo( SOCKET s, const char *buf, int len, int flags, const sockaddr *to, int tolen)
{
PRINT_DEBUG_ENTRY();
if (is_lan_ip(to, tolen)) {
return Real_SendTo( s, buf, len, flags, to, tolen );
} else {
return len;
}
}
static int WINAPI Mine_Connect( SOCKET s, const sockaddr *addr, int namelen )
{
PRINT_DEBUG_ENTRY();
if (is_lan_ip(addr, namelen)) {
return Real_Connect(s, addr, namelen);
} else {
WSASetLastError(WSAECONNREFUSED);
return SOCKET_ERROR;
}
}
static int WINAPI Mine_WSAConnect( SOCKET s, const sockaddr *addr, int namelen, LPWSABUF lpCallerData, LPWSABUF lpCalleeData, LPQOS lpSQOS, LPQOS lpGQOS)
{
PRINT_DEBUG_ENTRY();
if (is_lan_ip(addr, namelen)) {
return Real_WSAConnect(s, addr, namelen, lpCallerData, lpCalleeData, lpSQOS, lpGQOS);
} else {
WSASetLastError(WSAECONNREFUSED);
return SOCKET_ERROR;
}
}
inline bool file_exists (const std::string& name) {
struct stat buffer;
return (stat (name.c_str(), &buffer) == 0);
}
#ifdef DETOURS_64BIT
#define DLL_NAME "steam_api64.dll"
#else
#define DLL_NAME "steam_api.dll"
#endif
HMODULE (WINAPI *Real_GetModuleHandleA)(LPCSTR lpModuleName) = GetModuleHandleA;
HMODULE WINAPI Mine_GetModuleHandleA(LPCSTR lpModuleName)
{
PRINT_DEBUG("%s", lpModuleName);
if (!lpModuleName) return Real_GetModuleHandleA(lpModuleName);
std::string in(lpModuleName);
if (in == std::string(DLL_NAME)) {
in = std::string("crack") + in;
}
return Real_GetModuleHandleA(in.c_str());
}
static void redirect_crackdll()
{
DetourTransactionBegin();
DetourUpdateThread( GetCurrentThread() );
DetourAttach( &(PVOID &)Real_GetModuleHandleA, Mine_GetModuleHandleA );
DetourTransactionCommit();
}
static void unredirect_crackdll()
{
DetourTransactionBegin();
DetourUpdateThread( GetCurrentThread() );
DetourDetach( &(PVOID &)Real_GetModuleHandleA, Mine_GetModuleHandleA );
DetourTransactionCommit();
}
HMODULE crack_dll_handle;
static void load_dll()
{
std::string path = get_full_program_path();
path += "crack";
//path += PATH_SEPARATOR;
path += DLL_NAME;
PRINT_DEBUG("Crack file %s", path.c_str());
if (file_exists(path)) {
redirect_crackdll();
crack_dll_handle = LoadLibraryW(utf8_decode(path).c_str());
unredirect_crackdll();
PRINT_DEBUG("Loaded crack file");
}
}
#include "dll/local_storage.h"
static void load_dlls()
{
std::string path = Local_Storage::get_game_settings_path();
path += "load_dlls";
path += PATH_SEPARATOR;
std::vector<std::string> paths = Local_Storage::get_filenames_path(path);
for (auto & p: paths) {
std::string full_path = path + p;
size_t length = full_path.length();
if (length < 4) continue;
if (std::toupper(full_path[length - 1]) != 'L') continue;
if (std::toupper(full_path[length - 2]) != 'L') continue;
if (std::toupper(full_path[length - 3]) != 'D') continue;
if (full_path[length - 4] != '.') continue;
PRINT_DEBUG("Trying to load %s", full_path.c_str());
if (LoadLibraryW(utf8_decode(full_path).c_str())) {
PRINT_DEBUG("LOADED %s", full_path.c_str());
}
}
}
//For some reason when this function is optimized it breaks the shogun 2 prophet (reloaded) crack.
#pragma optimize( "", off )
bool crack_SteamAPI_RestartAppIfNecessary(uint32 unOwnAppID)
{
if (crack_dll_handle) {
bool (__stdcall* restart_app)(uint32) = (bool (__stdcall *)(uint32))GetProcAddress(crack_dll_handle, "SteamAPI_RestartAppIfNecessary");
if (restart_app) {
PRINT_DEBUG("Calling crack SteamAPI_RestartAppIfNecessary");
redirect_crackdll();
bool ret = restart_app(unOwnAppID);
unredirect_crackdll();
return ret;
}
}
return false;
}
#pragma optimize( "", on )
bool crack_SteamAPI_Init()
{
if (crack_dll_handle) {
bool (__stdcall* init_app)() = (bool (__stdcall *)())GetProcAddress(crack_dll_handle, "SteamAPI_Init");
if (init_app) {
PRINT_DEBUG("Calling crack SteamAPI_Init");
redirect_crackdll();
bool ret = init_app();
unredirect_crackdll();
return ret;
}
}
return false;
}
HINTERNET (WINAPI *Real_WinHttpConnect)(
IN HINTERNET hSession,
IN LPCWSTR pswzServerName,
IN INTERNET_PORT nServerPort,
IN DWORD dwReserved
);
HINTERNET WINAPI Mine_WinHttpConnect(
IN HINTERNET hSession,
IN LPCWSTR pswzServerName,
IN INTERNET_PORT nServerPort,
IN DWORD dwReserved
) {
PRINT_DEBUG("%ls %u", pswzServerName, nServerPort);
struct sockaddr_in ip4;
struct sockaddr_in6 ip6;
ip4.sin_family = AF_INET;
ip6.sin6_family = AF_INET6;
if ((InetPtonW(AF_INET, pswzServerName, &(ip4.sin_addr)) && is_lan_ip((sockaddr *)&ip4, sizeof(ip4))) || (InetPtonW(AF_INET6, pswzServerName, &(ip6.sin6_addr)) && is_lan_ip((sockaddr *)&ip6, sizeof(ip6)))) {
return Real_WinHttpConnect(hSession, pswzServerName, nServerPort, dwReserved);
} else {
return Real_WinHttpConnect(hSession, L"127.1.33.7", nServerPort, dwReserved);
}
}
HINTERNET (WINAPI *Real_WinHttpOpenRequest)(
IN HINTERNET hConnect,
IN LPCWSTR pwszVerb,
IN LPCWSTR pwszObjectName,
IN LPCWSTR pwszVersion,
IN LPCWSTR pwszReferrer,
IN LPCWSTR *ppwszAcceptTypes,
IN DWORD dwFlags
);
HINTERNET WINAPI Mine_WinHttpOpenRequest(
IN HINTERNET hConnect,
IN LPCWSTR pwszVerb,
IN LPCWSTR pwszObjectName,
IN LPCWSTR pwszVersion,
IN LPCWSTR pwszReferrer,
IN LPCWSTR *ppwszAcceptTypes,
IN DWORD dwFlags
) {
PRINT_DEBUG("%ls %ls %ls %ls %i", pwszVerb, pwszObjectName, pwszVersion, pwszReferrer, dwFlags);
if (dwFlags & WINHTTP_FLAG_SECURE) {
dwFlags ^= WINHTTP_FLAG_SECURE;
}
return Real_WinHttpOpenRequest(hConnect, pwszVerb, pwszObjectName, pwszVersion, pwszReferrer, ppwszAcceptTypes, dwFlags);
}
static bool network_functions_attached = false;
BOOL WINAPI DllMain( HINSTANCE, DWORD dwReason, LPVOID ) {
switch ( dwReason ) {
case DLL_PROCESS_ATTACH:
if (!file_exists(get_full_program_path() + "disable_lan_only.txt") && !file_exists(get_full_program_path() + "\\steam_settings\\disable_lan_only.txt")) {
PRINT_DEBUG("Hooking lan only functions");
DetourTransactionBegin();
DetourUpdateThread( GetCurrentThread() );
DetourAttach( &(PVOID &)Real_SendTo, Mine_SendTo );
DetourAttach( &(PVOID &)Real_Connect, Mine_Connect );
DetourAttach( &(PVOID &)Real_WSAConnect, Mine_WSAConnect );
HMODULE winhttp = GetModuleHandleA("winhttp.dll");
if (winhttp) {
Real_WinHttpConnect = (decltype(Real_WinHttpConnect))GetProcAddress(winhttp, "WinHttpConnect");
DetourAttach( &(PVOID &)Real_WinHttpConnect, Mine_WinHttpConnect );
// Real_WinHttpOpenRequest = (decltype(Real_WinHttpOpenRequest))GetProcAddress(winhttp, "WinHttpOpenRequest");
// DetourAttach( &(PVOID &)Real_WinHttpOpenRequest, Mine_WinHttpOpenRequest );
}
DetourTransactionCommit();
network_functions_attached = true;
}
load_dll();
load_dlls();
break;
case DLL_PROCESS_DETACH:
if (network_functions_attached) {
DetourTransactionBegin();
DetourUpdateThread( GetCurrentThread() );
DetourDetach( &(PVOID &)Real_SendTo, Mine_SendTo );
DetourDetach( &(PVOID &)Real_Connect, Mine_Connect );
DetourDetach( &(PVOID &)Real_WSAConnect, Mine_WSAConnect );
if (Real_WinHttpConnect) {
DetourDetach( &(PVOID &)Real_WinHttpConnect, Mine_WinHttpConnect );
// DetourDetach( &(PVOID &)Real_WinHttpOpenRequest, Mine_WinHttpOpenRequest );
}
DetourTransactionCommit();
}
break;
}
return TRUE;
}
#else
void set_whitelist_ips(uint32_t *from, uint32_t *to, unsigned num_ips)
{
}
#endif
#else
void set_whitelist_ips(uint32_t *from, uint32_t *to, unsigned num_ips)
{
}
#endif
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