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// 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/win/sandbox_poc/pocdll/exports.h"
#include "sandbox/win/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 %d.\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);
}
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