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99 lines (82 loc) · 2.26 KB
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/* DllSecur.c -- DLL loading security
2023-12-03 : Igor Pavlov : Public domain */
#include "Precomp.h"
#ifdef _WIN32
#include "7zWindows.h"
#include "DllSecur.h"
#ifndef UNDER_CE
Z7_DIAGNOSTIC_IGNORE_CAST_FUNCTION
typedef BOOL (WINAPI *Func_SetDefaultDllDirectories)(DWORD DirectoryFlags);
#define MY_LOAD_LIBRARY_SEARCH_USER_DIRS 0x400
#define MY_LOAD_LIBRARY_SEARCH_SYSTEM32 0x800
#define DELIM "\0"
static const char * const g_Dlls =
"userenv"
DELIM "setupapi"
DELIM "apphelp"
DELIM "propsys"
DELIM "dwmapi"
DELIM "cryptbase"
DELIM "oleacc"
DELIM "clbcatq"
DELIM "version"
#ifndef _CONSOLE
DELIM "uxtheme"
#endif
DELIM;
#endif
#ifdef __clang__
#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
#endif
#if defined (_MSC_VER) && _MSC_VER >= 1900
// sysinfoapi.h: kit10: GetVersion was declared deprecated
#pragma warning(disable : 4996)
#endif
#define IF_NON_VISTA_SET_DLL_DIRS_AND_RETURN \
if ((UInt16)GetVersion() != 6) { \
const \
Func_SetDefaultDllDirectories setDllDirs = \
(Func_SetDefaultDllDirectories) Z7_CAST_FUNC_C GetProcAddress(GetModuleHandle(TEXT("kernel32.dll")), \
"SetDefaultDllDirectories"); \
if (setDllDirs) if (setDllDirs(MY_LOAD_LIBRARY_SEARCH_SYSTEM32 | MY_LOAD_LIBRARY_SEARCH_USER_DIRS)) return; }
void My_SetDefaultDllDirectories(void)
{
#ifndef UNDER_CE
IF_NON_VISTA_SET_DLL_DIRS_AND_RETURN
#endif
}
void LoadSecurityDlls(void)
{
#ifndef UNDER_CE
// at Vista (ver 6.0) : CoCreateInstance(CLSID_ShellLink, ...) doesn't work after SetDefaultDllDirectories() : Check it ???
IF_NON_VISTA_SET_DLL_DIRS_AND_RETURN
{
wchar_t buf[MAX_PATH + 100];
const char *dll;
unsigned pos = GetSystemDirectoryW(buf, MAX_PATH + 2);
if (pos == 0 || pos > MAX_PATH)
return;
if (buf[pos - 1] != '\\')
buf[pos++] = '\\';
for (dll = g_Dlls; *dll != 0;)
{
wchar_t *dest = &buf[pos];
for (;;)
{
const char c = *dll++;
if (c == 0)
break;
*dest++ = (Byte)c;
}
dest[0] = '.';
dest[1] = 'd';
dest[2] = 'l';
dest[3] = 'l';
dest[4] = 0;
// lstrcatW(buf, L".dll");
LoadLibraryExW(buf, NULL, LOAD_WITH_ALTERED_SEARCH_PATH);
}
}
#endif
}
#endif // _WIN32