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kernel32: Implement safe search mode for SearchPath. 

Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Alexandre Julliard 2017-08-29 15:46:50 +02:00
parent 24e9dcb1b4
commit a8d291c0c0
5 changed files with 85 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
dlls/kernel32/kernel_private.h
View File

@ -89,7 +89,7 @@ struct binary_info
};
/* module.c */
extern WCHAR *MODULE_get_dll_load_path( LPCWSTR module ) DECLSPEC_HIDDEN;
extern WCHAR *MODULE_get_dll_load_path( LPCWSTR module, int safe_mode ) DECLSPEC_HIDDEN;
extern void MODULE_get_binary_info( HANDLE hfile, struct binary_info *info ) DECLSPEC_HIDDEN;
extern BOOL NLS_IsUnicodeOnlyLcid(LCID) DECLSPEC_HIDDEN;

7
dlls/kernel32/module.c
View File

@ -921,7 +921,7 @@ static inline WCHAR *append_path( WCHAR *p, const WCHAR *str )
* Compute the load path to use for a given dll.
* Returned pointer must be freed by caller.
*/
WCHAR *MODULE_get_dll_load_path( LPCWSTR module )
WCHAR *MODULE_get_dll_load_path( LPCWSTR module, int safe_mode )
{
static const WCHAR pathW[] = {'P','A','T','H',0};
static const WCHAR dotW[] = {'.',0};
@ -929,7 +929,6 @@ WCHAR *MODULE_get_dll_load_path( LPCWSTR module )
const WCHAR *system_path = get_dll_system_path();
const WCHAR *mod_end = NULL;
UNICODE_STRING name, value;
BOOL safe_mode;
WCHAR *p, *ret;
int len = 0, path_len = 0;
@ -958,7 +957,7 @@ WCHAR *MODULE_get_dll_load_path( LPCWSTR module )
path_len = value.Length;
RtlEnterCriticalSection( &dlldir_section );
safe_mode = get_dll_safe_mode();
if (safe_mode == -1) safe_mode = get_dll_safe_mode();
if (dll_directory) len += strlenW(dll_directory) + 1;
else len += 2; /* current directory */
if ((p = ret = HeapAlloc( GetProcessHeap(), 0, path_len + len * sizeof(WCHAR) )))
@ -1137,7 +1136,7 @@ static HMODULE load_library( const UNICODE_STRING *libname, DWORD flags )
if (flags & load_library_search_flags)
load_path = get_dll_load_path_search_flags( libname->Buffer, flags );
else
load_path = MODULE_get_dll_load_path( flags & LOAD_WITH_ALTERED_SEARCH_PATH ? libname->Buffer : NULL );
load_path = MODULE_get_dll_load_path( flags & LOAD_WITH_ALTERED_SEARCH_PATH ? libname->Buffer : NULL, -1 );
if (!load_path) return 0;
if (flags & (LOAD_LIBRARY_AS_DATAFILE | LOAD_LIBRARY_AS_DATAFILE_EXCLUSIVE))

77
dlls/kernel32/path.c
View File

@ -43,6 +43,7 @@ WINE_DEFAULT_DEBUG_CHANNEL(file);
#define MAX_PATHNAME_LEN 1024
static int path_safe_mode = -1; /* path mode set by SetSearchPathMode */
/* check if a file name is for an executable file (.exe or .com) */
static inline BOOL is_executable( const WCHAR *name )
@ -752,6 +753,51 @@ UINT WINAPI GetTempFileNameW( LPCWSTR path, LPCWSTR prefix, UINT unique, LPWSTR
}
/***********************************************************************
* get_path_safe_mode
*/
static BOOL get_path_safe_mode(void)
{
static const WCHAR keyW[] = {'\\','R','e','g','i','s','t','r','y','\\',
'M','a','c','h','i','n','e','\\',
'S','y','s','t','e','m','\\',
'C','u','r','r','e','n','t','C','o','n','t','r','o','l','S','e','t','\\',
'C','o','n','t','r','o','l','\\',
'S','e','s','s','i','o','n',' ','M','a','n','a','g','e','r',0};
static const WCHAR valueW[] = {'S','a','f','e','P','r','o','c','e','s','s','S','e','a','r','c','h','M','o','d','e',0};
if (path_safe_mode == -1)
{
char buffer[offsetof(KEY_VALUE_PARTIAL_INFORMATION, Data[sizeof(DWORD)])];
KEY_VALUE_PARTIAL_INFORMATION *info = (KEY_VALUE_PARTIAL_INFORMATION *)buffer;
OBJECT_ATTRIBUTES attr;
UNICODE_STRING nameW;
HANDLE hkey;
DWORD size = sizeof(buffer);
BOOL mode = FALSE;
attr.Length = sizeof(attr);
attr.RootDirectory = 0;
attr.ObjectName = &nameW;
attr.Attributes = 0;
attr.SecurityDescriptor = NULL;
attr.SecurityQualityOfService = NULL;
RtlInitUnicodeString( &nameW, keyW );
if (!NtOpenKey( &hkey, KEY_READ, &attr ))
{
RtlInitUnicodeString( &nameW, valueW );
if (!NtQueryValueKey( hkey, &nameW, KeyValuePartialInformation, buffer, size, &size ) &&
info->Type == REG_DWORD && info->DataLength == sizeof(DWORD))
mode = !!*(DWORD *)info->Data;
NtClose( hkey );
}
InterlockedCompareExchange( &path_safe_mode, mode, -1 );
}
return path_safe_mode != 0;
}
/***********************************************************************
* contains_pathW
*
@ -991,7 +1037,7 @@ DWORD WINAPI SearchPathW( LPCWSTR path, LPCWSTR name, LPCWSTR ext, DWORD buflen,
}
else
{
if ((dll_path = MODULE_get_dll_load_path( NULL )))
if ((dll_path = MODULE_get_dll_load_path( NULL, get_path_safe_mode() )))
{
ret = RtlDosSearchPath_U( dll_path, name, NULL, buflen * sizeof(WCHAR),
buffer, lastpart ) / sizeof(WCHAR);
@ -2075,9 +2121,32 @@ BOOL WINAPI CheckNameLegalDOS8Dot3W(const WCHAR *name, char *oemname, DWORD oemn
/*************************************************************************
* SetSearchPathMode (KERNEL32.@)
*/
BOOL WINAPI SetSearchPathMode(DWORD flags)
BOOL WINAPI SetSearchPathMode( DWORD flags )
{
FIXME("(%x): stub\n", flags);
SetLastError( ERROR_CALL_NOT_IMPLEMENTED );
int val;
switch (flags)
{
case BASE_SEARCH_PATH_ENABLE_SAFE_SEARCHMODE:
val = 1;
break;
case BASE_SEARCH_PATH_DISABLE_SAFE_SEARCHMODE:
val = 0;
break;
case BASE_SEARCH_PATH_ENABLE_SAFE_SEARCHMODE | BASE_SEARCH_PATH_PERMANENT:
InterlockedExchange( &path_safe_mode, 2 );
return TRUE;
default:
SetLastError( ERROR_INVALID_PARAMETER );
return FALSE;
}
for (;;)
{
int prev = path_safe_mode;
if (prev == 2) break; /* permanently set */
if (InterlockedCompareExchange( &path_safe_mode, val, prev ) == prev) return TRUE;
}
SetLastError( ERROR_ACCESS_DENIED );
return FALSE;
}

2
dlls/kernel32/process.c
View File

@ -1258,7 +1258,7 @@ void CDECL __wine_kernel_init(void)
debugstr_w(main_exe_name), debugstr_w(__wine_main_wargv[0]) );
RtlInitUnicodeString( &NtCurrentTeb()->Peb->ProcessParameters->DllPath,
MODULE_get_dll_load_path(main_exe_name) );
MODULE_get_dll_load_path( main_exe_name, -1 ));
if (boot_events[0])
{

7
include/winbase.h
View File

@ -1005,6 +1005,12 @@ DECL_WINELIB_TYPE_AW(ENUMRESLANGPROC)
#define GET_MODULE_HANDLE_EX_FLAG_UNCHANGED_REFCOUNT 2
#define GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS 4
/* flags for SetSearchPathMode */
#define BASE_SEARCH_PATH_ENABLE_SAFE_SEARCHMODE 0x00001
#define BASE_SEARCH_PATH_DISABLE_SAFE_SEARCHMODE 0x10000
#define BASE_SEARCH_PATH_PERMANENT 0x08000
#define BASE_SEARCH_PATH_INVALID_FLAGS (~0x18001)
typedef PLDT_ENTRY LPLDT_ENTRY;
typedef enum _GET_FILEEX_INFO_LEVELS {
@ -2551,6 +2557,7 @@ WINBASEAPI BOOL WINAPI SetProcessAffinityMask(HANDLE,DWORD_PTR);
WINBASEAPI BOOL WINAPI SetProcessPriorityBoost(HANDLE,BOOL);
WINBASEAPI BOOL WINAPI SetProcessShutdownParameters(DWORD,DWORD);
WINBASEAPI BOOL WINAPI SetProcessWorkingSetSize(HANDLE,SIZE_T,SIZE_T);
WINBASEAPI BOOL WINAPI SetSearchPathMode(DWORD);
WINADVAPI BOOL WINAPI SetSecurityDescriptorControl(PSECURITY_DESCRIPTOR,SECURITY_DESCRIPTOR_CONTROL,SECURITY_DESCRIPTOR_CONTROL);
WINADVAPI BOOL WINAPI SetSecurityDescriptorDacl(PSECURITY_DESCRIPTOR,BOOL,PACL,BOOL);
WINADVAPI BOOL WINAPI SetSecurityDescriptorGroup(PSECURITY_DESCRIPTOR,PSID,BOOL);