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
14 namespace registry_util {
15
16 namespace {
17
18 const wchar_t kTimestampDelimiter[] = L"$";
19 const wchar_t kTempTestKeyPath[] = L"Software\\Chromium\\TempTestKeys";
20
DeleteStaleTestKeys(const base::Time & now,const base::string16 & test_key_root)21 void 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 Tokenize(key_name, base::string16(kTimestampDelimiter), &tokens);
37 int64 key_name_as_number = 0;
38
39 if (!base::StringToInt64(tokens[0], &key_name_as_number)) {
40 test_root_key.DeleteKey(key_name.c_str());
41 continue;
42 }
43
44 base::Time key_time = base::Time::FromInternalValue(key_name_as_number);
45 base::TimeDelta age = now - key_time;
46
47 if (age > base::TimeDelta::FromHours(24))
48 test_root_key.DeleteKey(key_name.c_str());
49 }
50 }
51
GenerateTempKeyPath(const base::string16 & test_key_root,const base::Time & timestamp)52 base::string16 GenerateTempKeyPath(const base::string16& test_key_root,
53 const base::Time& timestamp) {
54 base::string16 key_path = test_key_root;
55 key_path += L"\\" + base::Int64ToString16(timestamp.ToInternalValue());
56 key_path += kTimestampDelimiter + base::ASCIIToWide(base::GenerateGUID());
57
58 return key_path;
59 }
60
61 } // namespace
62
ScopedRegistryKeyOverride(HKEY override,const base::string16 & key_path)63 RegistryOverrideManager::ScopedRegistryKeyOverride::ScopedRegistryKeyOverride(
64 HKEY override,
65 const base::string16& key_path)
66 : override_(override) {
67 EXPECT_EQ(
68 ERROR_SUCCESS,
69 temp_key_.Create(HKEY_CURRENT_USER, key_path.c_str(), KEY_ALL_ACCESS));
70 EXPECT_EQ(ERROR_SUCCESS,
71 ::RegOverridePredefKey(override_, temp_key_.Handle()));
72 }
73
74 RegistryOverrideManager::
~ScopedRegistryKeyOverride()75 ScopedRegistryKeyOverride::~ScopedRegistryKeyOverride() {
76 ::RegOverridePredefKey(override_, NULL);
77 temp_key_.DeleteKey(L"");
78 }
79
RegistryOverrideManager()80 RegistryOverrideManager::RegistryOverrideManager()
81 : timestamp_(base::Time::Now()), test_key_root_(kTempTestKeyPath) {
82 DeleteStaleTestKeys(timestamp_, test_key_root_);
83 }
84
RegistryOverrideManager(const base::Time & timestamp,const base::string16 & test_key_root)85 RegistryOverrideManager::RegistryOverrideManager(
86 const base::Time& timestamp,
87 const base::string16& test_key_root)
88 : timestamp_(timestamp), test_key_root_(test_key_root) {
89 DeleteStaleTestKeys(timestamp_, test_key_root_);
90 }
91
~RegistryOverrideManager()92 RegistryOverrideManager::~RegistryOverrideManager() {}
93
OverrideRegistry(HKEY override,const base::string16 &)94 void RegistryOverrideManager::OverrideRegistry(
95 HKEY override,
96 const base::string16& /*override_name*/) {
97 base::string16 key_path = GenerateTempKeyPath(test_key_root_, timestamp_);
98 overrides_.push_back(new ScopedRegistryKeyOverride(override, key_path));
99 }
100
GenerateTempKeyPath()101 base::string16 GenerateTempKeyPath() {
102 return GenerateTempKeyPath(base::string16(kTempTestKeyPath),
103 base::Time::Now());
104 }
105
106 } // namespace registry_util
107