sandbox/win/sandbox_poc/pocdll/fs.cc

   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.
  13 void 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
  40 void 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 }