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visualboyadvance-m
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Insanity for the sake of insanity.

This commit is contained in:
n-a-c-h 2008-06-02 02:15:55 +00:00
parent 23460ff9ad
commit 475784b4fb
3 changed files with 18 additions and 13 deletions
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20
src/win32/VBA.cpp
View File

@ -495,9 +495,14 @@ static lpExitProcess protectHelp[2] = { (lpExitProcess)srandWrap, (lpExitProcess
typedef HMODULE (WINAPI* lpLoadLibrary)(LPCTSTR); typedef HMODULE (WINAPI* lpLoadLibrary)(LPCTSTR);
typedef FARPROC (WINAPI* lpGetProcAddress)(HMODULE, LPCSTR); typedef FARPROC (WINAPI* lpGetProcAddress)(HMODULE, LPCSTR);
typedef int (*lpExecutableValid)(const char *);
typedef char *(*lpUnprotectBuffer)(unsigned char *, size_t);
SET_FN_PTR(LoadLibrary, 0x01301100); #pragma optimize("", off)
SET_FN_PTR(GetProcAddress, 0x01301100); SET_FN_PTR(LoadLibrary, 0x01301400);
SET_FN_PTR(GetProcAddress, 0x01301500);
SET_FN_PTR(ExecutableValid, 0x01301600);
SET_FN_PTR(unprotect_buffer, 0x01301700);
int VBA::doProtection() int VBA::doProtection()
{ {
@ -507,33 +512,34 @@ int VBA::doProtection()
HMODULE hM_kernel32 = ((lpLoadLibrary)GET_FN_PTR(LoadLibrary))(unprotect_buffer(kernel_encoded, sizeof(kernel_encoded))); HMODULE hM_kernel32 = ((lpLoadLibrary)GET_FN_PTR(LoadLibrary))(unprotect_buffer(kernel_encoded, sizeof(kernel_encoded)));
if (hM_kernel32) if (hM_kernel32)
{ {
pGetModuleFileNameA = (lpGetModuleFileNameA)((lpGetProcAddress)GET_FN_PTR(GetProcAddress))(hM_kernel32, unprotect_buffer(getname_encoded, sizeof(getname_encoded))); pGetModuleFileNameA = (lpGetModuleFileNameA)((lpGetProcAddress)GET_FN_PTR(GetProcAddress))(hM_kernel32, ((lpUnprotectBuffer)GET_FN_PTR(unprotect_buffer))(getname_encoded, sizeof(getname_encoded)));
if (pGetModuleFileNameA) if (pGetModuleFileNameA)
{ {
pGetModuleFileNameA(GetModuleHandle(0), szEXEFileName, sizeof(szEXEFileName)); pGetModuleFileNameA(GetModuleHandle(0), szEXEFileName, sizeof(szEXEFileName));
} }
pExitProcess = (lpExitProcess)((lpGetProcAddress)GET_FN_PTR(GetProcAddress))(hM_kernel32, unprotect_buffer(exit_encoded, sizeof(exit_encoded))); pExitProcess = (lpExitProcess)((lpGetProcAddress)GET_FN_PTR(GetProcAddress))(hM_kernel32, ((lpUnprotectBuffer)GET_FN_PTR(unprotect_buffer))(exit_encoded, sizeof(exit_encoded)));
protectHelp[1] = pExitProcess; protectHelp[1] = pExitProcess;
return(ExecutableValid(szEXEFileName)); return(((lpExecutableValid)GET_FN_PTR(ExecutableValid))(szEXEFileName));
} }
return(-3); return(-3);
} }
static BOOL doStuffGood(VBA *vba, int num) static BOOL doStuffGood(VBA *vba, register int num)
{ {
protectHelp[vba->securityCheck2]((UINT)time(0)); protectHelp[vba->securityCheck2]((UINT)time(0));
num ^= 1; num ^= 1;
return((BOOL)num); return((BOOL)num);
} }
static BOOL doStuffBad(VBA *vba, int num) static BOOL doStuffBad(VBA *vba, register int num)
{ {
num |= 1; num |= 1;
vba->pExitProcess(num); vba->pExitProcess(num);
return(doStuffGood(vba, num&1)); return(doStuffGood(vba, num&1));
} }
#pragma optimize("", on)
typedef bool (VBA::*trapPointer)(bool); typedef bool (VBA::*trapPointer)(bool);
static trapPointer trapPointers[6]; static trapPointer trapPointers[6];

4
src/win32/protect.c
View File

@ -32,8 +32,8 @@ int ExecutableValid(const char *executable_filename)
#else #else
SET_FN_PTR(fopen, 0x01301100); SET_FN_PTR(fopen, 0x01301100);
SET_FN_PTR(fread, 0x01301100); SET_FN_PTR(fread, 0x01301200);
SET_FN_PTR(malloc, 0x01301100); SET_FN_PTR(malloc, 0x01301300);
typedef FILE * (*p_fopen)(const char *path, const char *mode); typedef FILE * (*p_fopen)(const char *path, const char *mode);
typedef size_t (*p_fread)(void *ptr, size_t size, size_t nmemb, FILE *stream); typedef size_t (*p_fread)(void *ptr, size_t size, size_t nmemb, FILE *stream);

5
src/win32/protect.h
View File

@ -13,12 +13,11 @@ char *unprotect_buffer(unsigned char *buffer, size_t buffer_len);
#pragma optimize("", off) #pragma optimize("", off)
#define SET_FN_PTR(func, num) \ #define SET_FN_PTR(func, num) \
static __inline void *get_##func(void) { \ static __inline void *get_##func(void) { \
int i, j = num / 4; \ volatile int i, j = num / 4; \
long ptr = (long)func + num; \ long ptr = (long)func + num; \
for (i = 0; i < 2; i++) { ptr -= j; } \ for (i = 0; i < 2; i++) { ptr -= j; } \
return (void *)(ptr - (j * 2)); \ return (void *)(ptr - (j * 2)); \
} \ }
#pragma optimize("", on) #pragma optimize("", on)
#define GET_FN_PTR(func) get_##func() #define GET_FN_PTR(func) get_##func()