| 1 | /* DllSecur.c -- DLL loading security\r |
| 2 | 2016-10-04 : Igor Pavlov : Public domain */\r |
| 3 | \r |
| 4 | #include "Precomp.h"\r |
| 5 | \r |
| 6 | #ifdef _WIN32\r |
| 7 | \r |
| 8 | #include <windows.h>\r |
| 9 | \r |
| 10 | #include "DllSecur.h"\r |
| 11 | \r |
| 12 | #ifndef UNDER_CE\r |
| 13 | \r |
| 14 | typedef BOOL (WINAPI *Func_SetDefaultDllDirectories)(DWORD DirectoryFlags);\r |
| 15 | \r |
| 16 | #define MY_LOAD_LIBRARY_SEARCH_USER_DIRS 0x400\r |
| 17 | #define MY_LOAD_LIBRARY_SEARCH_SYSTEM32 0x800\r |
| 18 | \r |
| 19 | static const char * const g_Dlls =\r |
| 20 | #ifndef _CONSOLE\r |
| 21 | "UXTHEME\0"\r |
| 22 | #endif\r |
| 23 | "USERENV\0"\r |
| 24 | "SETUPAPI\0"\r |
| 25 | "APPHELP\0"\r |
| 26 | "PROPSYS\0"\r |
| 27 | "DWMAPI\0"\r |
| 28 | "CRYPTBASE\0"\r |
| 29 | "OLEACC\0"\r |
| 30 | "CLBCATQ\0"\r |
| 31 | ;\r |
| 32 | \r |
| 33 | #endif\r |
| 34 | \r |
| 35 | void LoadSecurityDlls()\r |
| 36 | {\r |
| 37 | #ifndef UNDER_CE\r |
| 38 | \r |
| 39 | wchar_t buf[MAX_PATH + 100];\r |
| 40 | \r |
| 41 | {\r |
| 42 | // at Vista (ver 6.0) : CoCreateInstance(CLSID_ShellLink, ...) doesn't work after SetDefaultDllDirectories() : Check it ???\r |
| 43 | OSVERSIONINFO vi;\r |
| 44 | vi.dwOSVersionInfoSize = sizeof(vi);\r |
| 45 | if (!GetVersionEx(&vi) || vi.dwMajorVersion != 6 || vi.dwMinorVersion != 0)\r |
| 46 | {\r |
| 47 | Func_SetDefaultDllDirectories setDllDirs = (Func_SetDefaultDllDirectories)\r |
| 48 | GetProcAddress(GetModuleHandle(TEXT("kernel32.dll")), "SetDefaultDllDirectories");\r |
| 49 | if (setDllDirs)\r |
| 50 | if (setDllDirs(MY_LOAD_LIBRARY_SEARCH_SYSTEM32 | MY_LOAD_LIBRARY_SEARCH_USER_DIRS))\r |
| 51 | return;\r |
| 52 | }\r |
| 53 | }\r |
| 54 | \r |
| 55 | {\r |
| 56 | unsigned len = GetSystemDirectoryW(buf, MAX_PATH + 2);\r |
| 57 | if (len == 0 || len > MAX_PATH)\r |
| 58 | return;\r |
| 59 | }\r |
| 60 | {\r |
| 61 | const char *dll;\r |
| 62 | unsigned pos = (unsigned)lstrlenW(buf);\r |
| 63 | \r |
| 64 | if (buf[pos - 1] != '\\')\r |
| 65 | buf[pos++] = '\\';\r |
| 66 | \r |
| 67 | for (dll = g_Dlls; dll[0] != 0;)\r |
| 68 | {\r |
| 69 | unsigned k = 0;\r |
| 70 | for (;;)\r |
| 71 | {\r |
| 72 | char c = *dll++;\r |
| 73 | buf[pos + k] = c;\r |
| 74 | k++;\r |
| 75 | if (c == 0)\r |
| 76 | break;\r |
| 77 | }\r |
| 78 | \r |
| 79 | lstrcatW(buf, L".dll");\r |
| 80 | LoadLibraryExW(buf, NULL, LOAD_WITH_ALTERED_SEARCH_PATH);\r |
| 81 | }\r |
| 82 | }\r |
| 83 | \r |
| 84 | #endif\r |
| 85 | }\r |
| 86 | \r |
| 87 | #endif\r |