| 16 | } |
| 17 | |
| 18 | LONG NTAPI VehExceptionHandler(EXCEPTION_POINTERS* ExceptionInfo) |
| 19 | { |
| 20 | DWORD OldProtect = 0; |
| 21 | if (ExceptionInfo->ExceptionRecord->ExceptionCode == EXCEPTION_ACCESS_VIOLATION) |
| 22 | { |
| 23 | for (auto it = PagesOfNoAccessOfData.begin(); it != PagesOfNoAccessOfData.end(); it++) |
| 24 | { |
| 25 | if (ExceptionInfo->ExceptionRecord->ExceptionInformation[1] <= (*it).lpAddress + (*it).dwSize && |
| 26 | ExceptionInfo->ExceptionRecord->ExceptionInformation[1] >= (*it).lpAddress) |
| 27 | { |
| 28 | m.lock(); |
| 29 | //Restore Page Protection and Decrypt |
| 30 | (*it).Protected = FALSE;//Not Protected |
| 31 | VirtualProtect((LPVOID)(*it).lpAddress, (*it).dwSize, PAGE_EXECUTE_READWRITE, &OldProtect); |
| 32 | |
| 33 | if ((*it).Decrypt) |
| 34 | (*it).Decrypt((*it).lpAddress, (*it).dwSize); |
| 35 | else |
| 36 | EncryptData((*it).lpAddress, (*it).dwSize);//Decrypt |
| 37 | |
| 38 | ExceptionInfo->ContextRecord->EFlags |= 0x100;//Do a single step |
| 39 | return EXCEPTION_CONTINUE_EXECUTION; |
| 40 | |
| 41 | } |
| 42 | } |
| 43 | |
| 44 | } |
| 45 | |
| 46 | if (ExceptionInfo->ExceptionRecord->ExceptionCode == STATUS_SINGLE_STEP) |
| 47 | { |
| 48 | for (auto it = PagesOfNoAccessOfData.begin(); it != PagesOfNoAccessOfData.end(); it++) |
| 49 | { |
| 50 | if ((*it).Protected == FALSE) |
| 51 | { |
| 52 | if ((*it).Encrypt) |
| 53 | (*it).Encrypt((*it).lpAddress, (*it).dwSize); |
| 54 | else |
| 55 | EncryptData((*it).lpAddress, (*it).dwSize);//加密 |
| 56 | |
| 57 | VirtualProtect((LPVOID)(*it).lpAddress, (*it).dwSize, PAGE_NOACCESS, &OldProtect); |
| 58 | m.unlock(); |
| 59 | return EXCEPTION_CONTINUE_EXECUTION; |
| 60 | } |
| 61 | } |
| 62 | } |
| 63 | |
| 64 | return EXCEPTION_CONTINUE_SEARCH; |
| 65 | |
| 66 | } |
| 67 | |
| 68 | BOOL Init() |
| 69 | { |
nothing calls this directly
no test coverage detected