Stat files directly to avoid issues with Windows _wstat

c/meterpreter/source/extensions/stdapi/server/fs/fs_win.c

@@ -287,16 +287,103 @@ int fs_fopen(const char *path, const char *mode, FILE **f)
 	return rc;
 }
 
+#define Py_SAFE_DOWNCASTM(VALUE, WIDE, NARROW) (NARROW)(VALUE)
+
+static int
+attributes_to_mode(DWORD attr)
+{
+	int m = 0;
+	if (attr & FILE_ATTRIBUTE_DIRECTORY)
+		m |= _S_IFDIR | 0111; /* IFEXEC for user,group,other */
+	else
+		m |= _S_IFREG;
+	if (attr & FILE_ATTRIBUTE_READONLY)
+		m |= 0444;
+	else
+		m |= 0666;
+	return m;
+}
+
+static __int64 secs_between_epochs = 11644473600;
+
+static BOOL
+attributes_from_dir_w(LPCWSTR pszFile, LPWIN32_FILE_ATTRIBUTE_DATA pfad)
+{
+	HANDLE hFindFile;
+	WIN32_FIND_DATAW FileData;
+	hFindFile = FindFirstFileW(pszFile, &FileData);
+	if (hFindFile == INVALID_HANDLE_VALUE)
+		return FALSE;
+	FindClose(hFindFile);
+	pfad->dwFileAttributes = FileData.dwFileAttributes;
+	pfad->ftCreationTime = FileData.ftCreationTime;
+	pfad->ftLastAccessTime = FileData.ftLastAccessTime;
+	pfad->ftLastWriteTime = FileData.ftLastWriteTime;
+	pfad->nFileSizeHigh = FileData.nFileSizeHigh;
+	pfad->nFileSizeLow = FileData.nFileSizeLow;
+	return TRUE;
+}
+
+static void
+FILE_TIME_to_time_t_nsec(FILETIME *in_ptr, time_t *time_out)
+{
+	__int64 in;
+	memcpy(&in, in_ptr, sizeof(in));
+	*time_out = Py_SAFE_DOWNCASTM((in / 10000000) - secs_between_epochs, __int64, time_t);
+}
+
+static int attribute_data_to_stat(WIN32_FILE_ATTRIBUTE_DATA *info, struct meterp_stat *result)
+{
+	memset(result, 0, sizeof(*result));
+	result->st_mode = attributes_to_mode(info->dwFileAttributes);
+	result->st_size = (((__int64)info->nFileSizeHigh) << 32) + info->nFileSizeLow;
+	FILE_TIME_to_time_t_nsec(&info->ftCreationTime, &result->st_ctime);
+	FILE_TIME_to_time_t_nsec(&info->ftLastWriteTime, &result->st_mtime);
+	FILE_TIME_to_time_t_nsec(&info->ftLastAccessTime, &result->st_atime);
+
+	return 0;
+}
+
+static int win32_wstatM(const wchar_t* path, struct meterp_stat *result)
+{
+	int code;
+	const wchar_t *dot;
+	WIN32_FILE_ATTRIBUTE_DATA info;
+	if (!GetFileAttributesExW(path, GetFileExInfoStandard, &info)) {
+		if (GetLastError() != ERROR_SHARING_VIOLATION) {
+			return -1;
+		}
+		else {
+			if (!attributes_from_dir_w(path, &info)) {
+				return -1;
+			}
+		}
+	}
+	code = attribute_data_to_stat(&info, result);
+	if (code < 0)
+		return code;
+	/* Set IFEXEC if it is an .exe, .bat, ... */
+	dot = wcsrchr(path, '.');
+	if (dot) {
+		if (_wcsicmp(dot, L".bat") == 0 ||
+			_wcsicmp(dot, L".cmd") == 0 ||
+			_wcsicmp(dot, L".exe") == 0 ||
+			_wcsicmp(dot, L".com") == 0)
+			result->st_mode |= 0111;
+	}
+	return code;
+}
+
 int fs_stat(char *filename, struct meterp_stat *buf)
 {
-	struct _stat64i32 sbuf;
+	struct meterp_stat sbuf;
 
 	wchar_t *filename_w = utf8_to_wchar(filename);
 	if (filename_w == NULL) {
 		return -1;
 	}
 
-	if (_wstat(filename_w, &sbuf) == -1) {
+	if (win32_wstatM(filename_w, &sbuf) == -1) {
 		return GetLastError();
 	}