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// Copyright (c) 2016 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 "components/user_prefs/tracked/registry_hash_store_contents_win.h"
#include <windows.h>
#include "base/logging.h"
#include "base/memory/ptr_util.h"
#include "base/numerics/safe_conversions.h"
#include "base/strings/string_split.h"
#include "base/strings/stringprintf.h"
#include "base/strings/utf_string_conversions.h"
#include "base/values.h"
#include "base/win/registry.h"
#include "components/user_prefs/tracked/tracked_preference_histogram_names.h"
using base::win::RegistryValueIterator;
namespace {
constexpr size_t kMacSize = 64;
base::string16 GetSplitPrefKeyName(const base::string16& reg_key_name,
const std::string& split_key_name) {
return reg_key_name + L"\\" + base::UTF8ToUTF16(split_key_name);
}
bool ReadMacFromRegistry(const base::win::RegKey& key,
const std::string& value_name,
std::string* out_mac) {
base::string16 string_value;
if (key.ReadValue(base::UTF8ToUTF16(value_name).c_str(), &string_value) ==
ERROR_SUCCESS &&
string_value.size() == kMacSize) {
out_mac->assign(base::UTF16ToUTF8(string_value));
return true;
}
return false;
}
// Removes |value_name| under |reg_key_name|. Returns true if found and
// successfully removed.
bool ClearAtomicMac(const base::string16& reg_key_name,
const std::string& value_name) {
base::win::RegKey key;
if (key.Open(HKEY_CURRENT_USER, reg_key_name.c_str(),
KEY_SET_VALUE | KEY_WOW64_32KEY) == ERROR_SUCCESS) {
return key.DeleteValue(base::UTF8ToUTF16(value_name).c_str()) ==
ERROR_SUCCESS;
}
return false;
}
// Deletes |split_key_name| under |reg_key_name|. Returns true if found and
// successfully removed.
bool ClearSplitMac(const base::string16& reg_key_name,
const std::string& split_key_name) {
base::win::RegKey key;
if (key.Open(HKEY_CURRENT_USER,
GetSplitPrefKeyName(reg_key_name, split_key_name).c_str(),
KEY_SET_VALUE | KEY_WOW64_32KEY) == ERROR_SUCCESS) {
return key.DeleteKey(L"") == ERROR_SUCCESS;
}
return false;
}
} // namespace
RegistryHashStoreContentsWin::RegistryHashStoreContentsWin(
const base::string16& registry_path,
const base::string16& store_key)
: preference_key_name_(registry_path + L"\\PreferenceMACs\\" + store_key) {}
RegistryHashStoreContentsWin::RegistryHashStoreContentsWin(
const RegistryHashStoreContentsWin& other) = default;
bool RegistryHashStoreContentsWin::IsCopyable() const {
return true;
}
std::unique_ptr<HashStoreContents> RegistryHashStoreContentsWin::MakeCopy()
const {
return base::WrapUnique(new RegistryHashStoreContentsWin(*this));
}
base::StringPiece RegistryHashStoreContentsWin::GetUMASuffix() const {
return user_prefs::tracked::kTrackedPrefRegistryValidationSuffix;
}
void RegistryHashStoreContentsWin::Reset() {
base::win::RegKey key;
if (key.Open(HKEY_CURRENT_USER, preference_key_name_.c_str(),
KEY_SET_VALUE | KEY_WOW64_32KEY) == ERROR_SUCCESS) {
LONG result = key.DeleteKey(L"");
DCHECK(result == ERROR_SUCCESS || result == ERROR_FILE_NOT_FOUND) << result;
}
}
bool RegistryHashStoreContentsWin::GetMac(const std::string& path,
std::string* out_value) {
base::win::RegKey key;
if (key.Open(HKEY_CURRENT_USER, preference_key_name_.c_str(),
KEY_QUERY_VALUE | KEY_WOW64_32KEY) == ERROR_SUCCESS) {
return ReadMacFromRegistry(key, path, out_value);
}
return false;
}
bool RegistryHashStoreContentsWin::GetSplitMacs(
const std::string& path,
std::map<std::string, std::string>* split_macs) {
DCHECK(split_macs);
DCHECK(split_macs->empty());
RegistryValueIterator iter_key(
HKEY_CURRENT_USER,
GetSplitPrefKeyName(preference_key_name_, path).c_str());
for (; iter_key.Valid(); ++iter_key) {
split_macs->insert(make_pair(base::UTF16ToUTF8(iter_key.Name()),
base::UTF16ToUTF8(iter_key.Value())));
}
return !split_macs->empty();
}
void RegistryHashStoreContentsWin::SetMac(const std::string& path,
const std::string& value) {
base::win::RegKey key;
DCHECK_EQ(kMacSize, value.size());
if (key.Create(HKEY_CURRENT_USER, preference_key_name_.c_str(),
KEY_SET_VALUE | KEY_WOW64_32KEY) == ERROR_SUCCESS) {
key.WriteValue(base::UTF8ToUTF16(path).c_str(),
base::UTF8ToUTF16(value).c_str());
}
}
void RegistryHashStoreContentsWin::SetSplitMac(const std::string& path,
const std::string& split_path,
const std::string& value) {
base::win::RegKey key;
DCHECK_EQ(kMacSize, value.size());
if (key.Create(HKEY_CURRENT_USER,
GetSplitPrefKeyName(preference_key_name_, path).c_str(),
KEY_SET_VALUE | KEY_WOW64_32KEY) == ERROR_SUCCESS) {
key.WriteValue(base::UTF8ToUTF16(split_path).c_str(),
base::UTF8ToUTF16(value).c_str());
}
}
bool RegistryHashStoreContentsWin::RemoveEntry(const std::string& path) {
return ClearAtomicMac(preference_key_name_, path) ||
ClearSplitMac(preference_key_name_, path);
}
void RegistryHashStoreContentsWin::ImportEntry(const std::string& path,
const base::Value* in_value) {
NOTREACHED()
<< "RegistryHashStoreContents does not support the ImportEntry operation";
}
const base::DictionaryValue* RegistryHashStoreContentsWin::GetContents() const {
NOTREACHED()
<< "RegistryHashStoreContents does not support the GetContents operation";
return NULL;
}
std::string RegistryHashStoreContentsWin::GetSuperMac() const {
NOTREACHED()
<< "RegistryHashStoreContents does not support the GetSuperMac operation";
return NULL;
}
void RegistryHashStoreContentsWin::SetSuperMac(const std::string& super_mac) {
NOTREACHED()
<< "RegistryHashStoreContents does not support the SetSuperMac operation";
}
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