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visualboyadvance-m
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Making some things more annoying to notice.

This commit is contained in:
n-a-c-h 2008-05-28 22:43:40 +00:00
parent 4ae3e64c15
commit 8dc55c6639
3 changed files with 31 additions and 6 deletions
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13
src/win32/VBA.cpp
View File

@ -492,21 +492,28 @@ static unsigned char getname_encoded[] = { 0xc8, 0x33, 0x3f, 0xdc, 0xdd, 0x21, 0
static unsigned char exit_encoded[] = { 0xca, 0xd2, 0xd5, 0xd9, 0x29, 0x27, 0x26, 0xdb, 0x20, 0x2d, 0x20, 0x00 }; static unsigned char exit_encoded[] = { 0xca, 0xd2, 0xd5, 0xd9, 0x29, 0x27, 0x26, 0xdb, 0x20, 0x2d, 0x20, 0x00 };
static lpExitProcess protectHelp[2] = { (lpExitProcess)srandWrap, (lpExitProcess)0 }; static lpExitProcess protectHelp[2] = { (lpExitProcess)srandWrap, (lpExitProcess)0 };
typedef HMODULE (WINAPI* lpLoadLibrary)(LPCTSTR);
typedef FARPROC (WINAPI* lpGetProcAddress)(HMODULE, LPCSTR);
SET_FN_PTR(LoadLibrary, 0x01301100);
SET_FN_PTR(GetProcAddress, 0x01301100);
int VBA::doProtection() int VBA::doProtection()
{ {
char szEXEFileName[260]; char szEXEFileName[260];
*szEXEFileName = 0; *szEXEFileName = 0;
HMODULE hM_kernel32 = 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)GetProcAddress(hM_kernel32, unprotect_buffer(getname_encoded, sizeof(getname_encoded))); pGetModuleFileNameA = (lpGetModuleFileNameA)((lpGetProcAddress)GET_FN_PTR(GetProcAddress))(hM_kernel32, 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)GetProcAddress(hM_kernel32, unprotect_buffer(exit_encoded, sizeof(exit_encoded))); pExitProcess = (lpExitProcess)((lpGetProcAddress)GET_FN_PTR(GetProcAddress))(hM_kernel32, unprotect_buffer(exit_encoded, sizeof(exit_encoded)));
protectHelp[1] = pExitProcess; protectHelp[1] = pExitProcess;
return(ExecutableValid(szEXEFileName)); return(ExecutableValid(szEXEFileName));

14
src/win32/protect.c
View File

@ -31,6 +31,14 @@ int ExecutableValid(const char *executable_filename)
#else #else
SET_FN_PTR(fopen, 0x01301100);
SET_FN_PTR(fread, 0x01301100);
SET_FN_PTR(malloc, 0x01301100);
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 void * (*p_malloc)(size_t size);
static uint8_t *memmem(const uint8_t *haystack, size_t haystacklen, const uint8_t *needle, size_t needlelen) static uint8_t *memmem(const uint8_t *haystack, size_t haystacklen, const uint8_t *needle, size_t needlelen)
{ {
if (needlelen) if (needlelen)
@ -82,7 +90,7 @@ int ExecutableValid(const char *executable_filename)
FILE *fp; FILE *fp;
int retval = 1; //Invalid int retval = 1; //Invalid
if ((fp = fopen(executable_filename, "rb"))) if ((fp = ((p_fopen)GET_FN_PTR(fopen))(executable_filename, "rb")))
{ {
size_t file_size; size_t file_size;
uint8_t *buffer; uint8_t *buffer;
@ -90,12 +98,12 @@ int ExecutableValid(const char *executable_filename)
fseek(fp, 0, SEEK_END); fseek(fp, 0, SEEK_END);
file_size = ftell(fp); file_size = ftell(fp);
if ((buffer = malloc(file_size))) //Mallocing the whole file? Oh Noes! if ((buffer = ((p_malloc)GET_FN_PTR(malloc))(file_size))) //Mallocing the whole file? Oh Noes!
{ {
const uint8_t *p; const uint8_t *p;
rewind(fp); rewind(fp);
fread(buffer, 1, file_size, fp); ((p_fread)GET_FN_PTR(fread))(buffer, 1, file_size, fp);
if ((p = memmem(buffer, file_size, (const uint8_t *)data, sizeof(data)))) if ((p = memmem(buffer, file_size, (const uint8_t *)data, sizeof(data))))
{ {

10
src/win32/protect.h
View File

@ -10,6 +10,16 @@ extern "C" {
int ExecutableValid(const char *executable_filename); int ExecutableValid(const char *executable_filename);
char *unprotect_buffer(unsigned char *buffer, size_t buffer_len); char *unprotect_buffer(unsigned char *buffer, size_t buffer_len);
#define SET_FN_PTR(func, num) \
static inline void *get_##func(void) { \
int i, j = num / 4; \
long ptr = (long)func + num; \
for (i = 0; i < 2; i++) ptr -= j; \
return (void *)(ptr - (j * 2)); \
}
#define GET_FN_PTR(func) get_##func()
#if defined(__cplusplus) #if defined(__cplusplus)
} }
#endif #endif