1// Copyright (c) 2011 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 "base/test/test_reg_util_win.h" 6 7#include "base/guid.h" 8#include "base/logging.h" 9#include "base/strings/string_number_conversions.h" 10#include "base/strings/string_util.h" 11#include "base/strings/utf_string_conversions.h" 12#include "testing/gtest/include/gtest/gtest.h" 13 14namespace registry_util { 15 16namespace { 17 18const wchar_t kTimestampDelimiter[] = L"$"; 19const wchar_t kTempTestKeyPath[] = L"Software\\Chromium\\TempTestKeys"; 20 21void DeleteStaleTestKeys(const base::Time& now, 22 const base::string16& test_key_root) { 23 base::win::RegKey test_root_key; 24 if (test_root_key.Open(HKEY_CURRENT_USER, 25 test_key_root.c_str(), 26 KEY_ALL_ACCESS) != ERROR_SUCCESS) { 27 // This will occur on first-run, but is harmless. 28 return; 29 } 30 31 base::win::RegistryKeyIterator iterator_test_root_key(HKEY_CURRENT_USER, 32 test_key_root.c_str()); 33 for (; iterator_test_root_key.Valid(); ++iterator_test_root_key) { 34 base::string16 key_name = iterator_test_root_key.Name(); 35 std::vector<base::string16> tokens; 36 if (!Tokenize(key_name, base::string16(kTimestampDelimiter), &tokens)) 37 continue; 38 int64 key_name_as_number = 0; 39 40 if (!base::StringToInt64(tokens[0], &key_name_as_number)) { 41 test_root_key.DeleteKey(key_name.c_str()); 42 continue; 43 } 44 45 base::Time key_time = base::Time::FromInternalValue(key_name_as_number); 46 base::TimeDelta age = now - key_time; 47 48 if (age > base::TimeDelta::FromHours(24)) 49 test_root_key.DeleteKey(key_name.c_str()); 50 } 51} 52 53base::string16 GenerateTempKeyPath(const base::string16& test_key_root, 54 const base::Time& timestamp) { 55 base::string16 key_path = test_key_root; 56 key_path += L"\\" + base::Int64ToString16(timestamp.ToInternalValue()); 57 key_path += kTimestampDelimiter + base::ASCIIToWide(base::GenerateGUID()); 58 59 return key_path; 60} 61 62} // namespace 63 64RegistryOverrideManager::ScopedRegistryKeyOverride::ScopedRegistryKeyOverride( 65 HKEY override, 66 const base::string16& key_path) 67 : override_(override) { 68 EXPECT_EQ( 69 ERROR_SUCCESS, 70 temp_key_.Create(HKEY_CURRENT_USER, key_path.c_str(), KEY_ALL_ACCESS)); 71 EXPECT_EQ(ERROR_SUCCESS, 72 ::RegOverridePredefKey(override_, temp_key_.Handle())); 73} 74 75RegistryOverrideManager:: 76 ScopedRegistryKeyOverride::~ScopedRegistryKeyOverride() { 77 ::RegOverridePredefKey(override_, NULL); 78 temp_key_.DeleteKey(L""); 79} 80 81RegistryOverrideManager::RegistryOverrideManager() 82 : timestamp_(base::Time::Now()), test_key_root_(kTempTestKeyPath) { 83 DeleteStaleTestKeys(timestamp_, test_key_root_); 84} 85 86RegistryOverrideManager::RegistryOverrideManager( 87 const base::Time& timestamp, 88 const base::string16& test_key_root) 89 : timestamp_(timestamp), test_key_root_(test_key_root) { 90 DeleteStaleTestKeys(timestamp_, test_key_root_); 91} 92 93RegistryOverrideManager::~RegistryOverrideManager() {} 94 95void RegistryOverrideManager::OverrideRegistry(HKEY override) { 96 base::string16 key_path = GenerateTempKeyPath(test_key_root_, timestamp_); 97 overrides_.push_back(new ScopedRegistryKeyOverride(override, key_path)); 98} 99 100base::string16 GenerateTempKeyPath() { 101 return GenerateTempKeyPath(base::string16(kTempTestKeyPath), 102 base::Time::Now()); 103} 104 105} // namespace registry_util 106