root/sandbox/win/sandbox_poc/pocdll/registry.cc

DEFINITIONS

1. HKEYToString
2. TryOpenKey
3. TestRegistry

// 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 registry.

// Converts an HKEY to a string. This is using the lazy way and works only
// for the main hives.
// "key" is the hive to convert to string.
// The return value is the string corresponding to the hive or "unknown"
const wchar_t *HKEYToString(const HKEY key) {
  switch (reinterpret_cast<LONG_PTR>(key)) {
    case HKEY_CLASSES_ROOT:
      return L"HKEY_CLASSES_ROOT";
    case HKEY_CURRENT_CONFIG:
      return L"HKEY_CURRENT_CONFIG";
    case HKEY_CURRENT_USER:
      return L"HKEY_CURRENT_USER";
    case HKEY_LOCAL_MACHINE:
      return L"HKEY_LOCAL_MACHINE";
    case HKEY_USERS:
      return L"HKEY_USERS";
  }
  return L"unknown";
}

// Tries to open the key hive\path and outputs the result.
// "output" is the stream used for logging.
void TryOpenKey(const HKEY hive, const wchar_t *path, FILE *output) {
  HKEY key;
  LONG err_code = ::RegOpenKeyEx(hive,
                                 path,
                                 0,  // Reserved, must be 0.
                                 MAXIMUM_ALLOWED,
                                 &key);
  if (ERROR_SUCCESS == err_code) {
    fprintf(output, "[GRANTED] Opening key \"%S\\%S\". Handle 0x%p\r\n",
            HKEYToString(hive),
            path,
            key);
    ::RegCloseKey(key);
  } else {
    fprintf(output, "[BLOCKED] Opening key \"%S\\%S\". Error %d\r\n",
            HKEYToString(hive),
            path,
            err_code);
  }
}

void POCDLL_API TestRegistry(HANDLE log) {
  HandleToFile handle2file;
  FILE *output = handle2file.Translate(log, "w");

  TryOpenKey(HKEY_LOCAL_MACHINE, NULL, output);
  TryOpenKey(HKEY_CURRENT_USER, NULL, output);
  TryOpenKey(HKEY_USERS, NULL, output);
  TryOpenKey(HKEY_LOCAL_MACHINE,
             L"Software\\Microsoft\\Windows NT\\CurrentVersion\\WinLogon",
             output);
}