1 files changed, 54 insertions, 0 deletions
diff --git a/sandbox/win/sandbox_poc/pocdll/fs.cc b/sandbox/win/sandbox_poc/pocdll/fs.cc
new file mode 100644
index 0000000..42c1006
--- /dev/null
+++ b/sandbox/win/sandbox_poc/pocdll/fs.cc
@@ -0,0 +1,54 @@
+// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "sandbox/sandbox_poc/pocdll/exports.h"
+#include "sandbox/sandbox_poc/pocdll/utils.h"
+
+// This file contains the tests used to verify the security of the file system.
+
+// Tries to open a file and outputs the result.
+// "path" can contain environment variables.
+// "output" is the stream for the logging.
+void TryOpenFile(wchar_t *path, FILE *output) {
+  wchar_t path_expanded[MAX_PATH] = {0};
+  DWORD size = ::ExpandEnvironmentStrings(path, path_expanded, MAX_PATH - 1);
+  if (!size) {
+    fprintf(output, "[ERROR] Cannot expand \"%S\". Error %S.\r\n", path,
+            ::GetLastError());
+  }
+
+  HANDLE file;
+  file = ::CreateFile(path_expanded,
+                      GENERIC_READ,
+                      FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE,
+                      NULL,  // No security attributes
+                      OPEN_EXISTING,
+                      FILE_FLAG_BACKUP_SEMANTICS,
+                      NULL);  // No template
+
+  if (file && INVALID_HANDLE_VALUE != file) {
+    fprintf(output, "[GRANTED] Opening file \"%S\". Handle 0x%p\r\n", path,
+            file);
+    ::CloseHandle(file);
+  } else {
+    fprintf(output, "[BLOCKED] Opening file \"%S\". Error %d.\r\n", path,
+            ::GetLastError());
+  }
+}
+
+void POCDLL_API TestFileSystem(HANDLE log) {
+  HandleToFile handle2file;
+  FILE *output = handle2file.Translate(log, "w");
+
+  TryOpenFile(L"%SystemDrive%", output);
+  TryOpenFile(L"%SystemRoot%", output);
+  TryOpenFile(L"%ProgramFiles%", output);
+  TryOpenFile(L"%SystemRoot%\\System32", output);
+  TryOpenFile(L"%SystemRoot%\\explorer.exe", output);
+  TryOpenFile(L"%SystemRoot%\\Cursors\\arrow_i.cur", output);
+  TryOpenFile(L"%AllUsersProfile%", output);
+  TryOpenFile(L"%UserProfile%", output);
+  TryOpenFile(L"%Temp%", output);
+  TryOpenFile(L"%AppData%", output);
+}