1// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#include "sandbox/win/sandbox_poc/pocdll/exports.h"
6#include "sandbox/win/sandbox_poc/pocdll/utils.h"
7
8// This file contains the tests used to verify the security of the file system.
9
10// Tries to open a file and outputs the result.
11// "path" can contain environment variables.
12// "output" is the stream for the logging.
13void TryOpenFile(const wchar_t *path, FILE *output) {
14  wchar_t path_expanded[MAX_PATH] = {0};
15  DWORD size = ::ExpandEnvironmentStrings(path, path_expanded, MAX_PATH - 1);
16  if (!size) {
17    fprintf(output, "[ERROR] Cannot expand \"%S\". Error %ld.\r\n", path,
18            ::GetLastError());
19  }
20
21  HANDLE file;
22  file = ::CreateFile(path_expanded,
23                      GENERIC_READ,
24                      FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE,
25                      NULL,  // No security attributes
26                      OPEN_EXISTING,
27                      FILE_FLAG_BACKUP_SEMANTICS,
28                      NULL);  // No template
29
30  if (file && INVALID_HANDLE_VALUE != file) {
31    fprintf(output, "[GRANTED] Opening file \"%S\". Handle 0x%p\r\n", path,
32            file);
33    ::CloseHandle(file);
34  } else {
35    fprintf(output, "[BLOCKED] Opening file \"%S\". Error %ld.\r\n", path,
36            ::GetLastError());
37  }
38}
39
40void POCDLL_API TestFileSystem(HANDLE log) {
41  HandleToFile handle2file;
42  FILE *output = handle2file.Translate(log, "w");
43
44  TryOpenFile(L"%SystemDrive%", output);
45  TryOpenFile(L"%SystemRoot%", output);
46  TryOpenFile(L"%ProgramFiles%", output);
47  TryOpenFile(L"%SystemRoot%\\System32", output);
48  TryOpenFile(L"%SystemRoot%\\explorer.exe", output);
49  TryOpenFile(L"%SystemRoot%\\Cursors\\arrow_i.cur", output);
50  TryOpenFile(L"%AllUsersProfile%", output);
51  TryOpenFile(L"%UserProfile%", output);
52  TryOpenFile(L"%Temp%", output);
53  TryOpenFile(L"%AppData%", output);
54}
55