mirror of
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136 lines
4.6 KiB
C++
136 lines
4.6 KiB
C++
// Copyright 2011 The Chromium Authors
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "base/test/test_reg_util_win.h"
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#include <stdint.h>
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#include "base/memory/ptr_util.h"
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#include "base/strings/strcat.h"
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#include "base/strings/string_number_conversions.h"
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#include "base/strings/string_split.h"
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#include "base/strings/string_util.h"
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#include "base/strings/utf_string_conversions.h"
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#include "base/uuid.h"
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#include "testing/gtest/include/gtest/gtest.h"
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#include <windows.h>
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namespace registry_util {
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namespace {
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// Overriding HKLM is not permitted in some environments. This is controlled by
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// this bool and disallowed by calling
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// DisallowHKLMRegistryOverrideForIntegrationTests.
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bool g_hklm_override_allowed = true;
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constexpr char16_t kTimestampDelimiter[] = u"$";
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constexpr wchar_t kTempTestKeyPath[] = L"Software\\Chromium\\TempTestKeys";
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void DeleteStaleTestKeys(const base::Time& now,
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const std::wstring& test_key_root) {
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base::win::RegKey test_root_key;
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if (test_root_key.Open(HKEY_CURRENT_USER,
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test_key_root.c_str(),
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KEY_ALL_ACCESS) != ERROR_SUCCESS) {
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// This will occur on first-run, but is harmless.
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return;
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}
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base::win::RegistryKeyIterator iterator_test_root_key(HKEY_CURRENT_USER,
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test_key_root.c_str());
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for (; iterator_test_root_key.Valid(); ++iterator_test_root_key) {
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std::wstring key_name = iterator_test_root_key.Name();
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std::vector<base::StringPiece16> tokens = base::SplitStringPiece(
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base::AsStringPiece16(key_name), kTimestampDelimiter,
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base::KEEP_WHITESPACE, base::SPLIT_WANT_NONEMPTY);
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if (tokens.empty())
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continue;
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int64_t key_name_as_number = 0;
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if (!base::StringToInt64(tokens[0], &key_name_as_number)) {
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test_root_key.DeleteKey(key_name.c_str());
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continue;
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}
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base::Time key_time = base::Time::FromInternalValue(key_name_as_number);
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base::TimeDelta age = now - key_time;
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if (age > base::Hours(24))
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test_root_key.DeleteKey(key_name.c_str());
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}
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}
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std::wstring GenerateTempKeyPath(const std::wstring& test_key_root,
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const base::Time& timestamp) {
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return base::AsWString(base::StrCat(
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{base::AsStringPiece16(test_key_root), u"\\",
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base::NumberToString16(timestamp.ToInternalValue()), kTimestampDelimiter,
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base::ASCIIToUTF16(
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base::Uuid::GenerateRandomV4().AsLowercaseString())}));
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}
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} // namespace
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RegistryOverrideManager::ScopedRegistryKeyOverride::ScopedRegistryKeyOverride(
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HKEY override,
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const std::wstring& key_path)
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: override_(override), key_path_(key_path) {}
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RegistryOverrideManager::
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ScopedRegistryKeyOverride::~ScopedRegistryKeyOverride() {
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::RegOverridePredefKey(override_, NULL);
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base::win::RegKey(HKEY_CURRENT_USER, L"", KEY_QUERY_VALUE)
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.DeleteKey(key_path_.c_str());
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}
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RegistryOverrideManager::RegistryOverrideManager()
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: timestamp_(base::Time::Now()), test_key_root_(kTempTestKeyPath) {
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DeleteStaleTestKeys(timestamp_, test_key_root_);
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}
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RegistryOverrideManager::RegistryOverrideManager(
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const base::Time& timestamp,
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const std::wstring& test_key_root)
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: timestamp_(timestamp), test_key_root_(test_key_root) {
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DeleteStaleTestKeys(timestamp_, test_key_root_);
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}
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RegistryOverrideManager::~RegistryOverrideManager() {}
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void RegistryOverrideManager::OverrideRegistry(HKEY override) {
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OverrideRegistry(override, nullptr);
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}
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void RegistryOverrideManager::OverrideRegistry(HKEY override,
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std::wstring* override_path) {
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CHECK(override != HKEY_LOCAL_MACHINE || g_hklm_override_allowed)
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<< "Use of RegistryOverrideManager to override HKLM is not permitted in "
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"this environment.";
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std::wstring key_path = GenerateTempKeyPath(test_key_root_, timestamp_);
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base::win::RegKey temp_key;
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ASSERT_EQ(ERROR_SUCCESS, temp_key.Create(HKEY_CURRENT_USER, key_path.c_str(),
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KEY_ALL_ACCESS));
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ASSERT_EQ(ERROR_SUCCESS, ::RegOverridePredefKey(override, temp_key.Handle()));
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overrides_.push_back(
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std::make_unique<ScopedRegistryKeyOverride>(override, key_path));
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if (override_path)
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override_path->assign(key_path);
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}
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void RegistryOverrideManager::SetAllowHKLMRegistryOverrideForIntegrationTests(
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bool allow) {
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g_hklm_override_allowed = allow;
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}
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std::wstring GenerateTempKeyPath() {
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return GenerateTempKeyPath(kTempTestKeyPath, base::Time::Now());
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}
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} // namespace registry_util
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