| // Copyright 2013 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/policy/core/common/registry_dict.h" |
| |
| #include <utility> |
| |
| #include "base/json/json_reader.h" |
| #include "base/memory/ptr_util.h" |
| #include "base/strings/string_number_conversions.h" |
| #include "base/strings/string_util.h" |
| #include "base/strings/utf_string_conversions.h" |
| #include "base/sys_byteorder.h" |
| #include "base/values.h" |
| |
| #if defined(OS_WIN) |
| #include "base/win/registry.h" |
| #include "components/policy/core/common/schema.h" |
| |
| using base::win::RegistryKeyIterator; |
| using base::win::RegistryValueIterator; |
| #endif // #if defined(OS_WIN) |
| |
| namespace policy { |
| |
| namespace { |
| |
| #if defined(OS_WIN) |
| // Validates that a key is numerical. Used for lists below. |
| bool IsKeyNumerical(const std::string& key) { |
| int temp = 0; |
| return base::StringToInt(key, &temp); |
| } |
| |
| // Converts a value (as read from the registry) to meet |schema|, converting |
| // types as necessary. Unconvertible types will show up as null values in the |
| // result. |
| std::unique_ptr<base::Value> ConvertValue(const base::Value& value, |
| const Schema& schema) { |
| if (!schema.valid()) |
| return value.CreateDeepCopy(); |
| |
| // If the type is good already, go with it. |
| if (value.IsType(schema.type())) { |
| // Recurse for complex types. |
| const base::DictionaryValue* dict = nullptr; |
| const base::ListValue* list = nullptr; |
| if (value.GetAsDictionary(&dict)) { |
| std::unique_ptr<base::DictionaryValue> result( |
| new base::DictionaryValue()); |
| for (base::DictionaryValue::Iterator entry(*dict); !entry.IsAtEnd(); |
| entry.Advance()) { |
| std::unique_ptr<base::Value> converted = |
| ConvertValue(entry.value(), schema.GetProperty(entry.key())); |
| if (converted) |
| result->SetWithoutPathExpansion(entry.key(), std::move(converted)); |
| } |
| return std::move(result); |
| } else if (value.GetAsList(&list)) { |
| std::unique_ptr<base::ListValue> result(new base::ListValue()); |
| for (base::ListValue::const_iterator entry(list->begin()); |
| entry != list->end(); ++entry) { |
| std::unique_ptr<base::Value> converted = |
| ConvertValue(*entry, schema.GetItems()); |
| if (converted) |
| result->Append(std::move(converted)); |
| } |
| return std::move(result); |
| } |
| return value.CreateDeepCopy(); |
| } |
| |
| // Else, do some conversions to map windows registry data types to JSON types. |
| std::string string_value; |
| int int_value = 0; |
| switch (schema.type()) { |
| case base::Value::Type::NONE: { |
| return base::MakeUnique<base::Value>(); |
| } |
| case base::Value::Type::BOOLEAN: { |
| // Accept booleans encoded as either string or integer. |
| if (value.GetAsInteger(&int_value) || |
| (value.GetAsString(&string_value) && |
| base::StringToInt(string_value, &int_value))) { |
| return std::unique_ptr<base::Value>(new base::Value(int_value != 0)); |
| } |
| break; |
| } |
| case base::Value::Type::INTEGER: { |
| // Integers may be string-encoded. |
| if (value.GetAsString(&string_value) && |
| base::StringToInt(string_value, &int_value)) { |
| return std::unique_ptr<base::Value>(new base::Value(int_value)); |
| } |
| break; |
| } |
| case base::Value::Type::DOUBLE: { |
| // Doubles may be string-encoded or integer-encoded. |
| double double_value = 0; |
| if (value.GetAsDouble(&double_value) || |
| (value.GetAsString(&string_value) && |
| base::StringToDouble(string_value, &double_value))) { |
| return std::unique_ptr<base::Value>(new base::Value(double_value)); |
| } |
| break; |
| } |
| case base::Value::Type::LIST: { |
| // Lists are encoded as subkeys with numbered value in the registry |
| // (non-numerical keys are ignored). |
| const base::DictionaryValue* dict = nullptr; |
| if (value.GetAsDictionary(&dict)) { |
| std::unique_ptr<base::ListValue> result(new base::ListValue()); |
| for (base::DictionaryValue::Iterator it(*dict); !it.IsAtEnd(); |
| it.Advance()) { |
| if (!IsKeyNumerical(it.key())) |
| continue; |
| std::unique_ptr<base::Value> converted = |
| ConvertValue(it.value(), schema.GetItems()); |
| if (converted) |
| result->Append(std::move(converted)); |
| } |
| return std::move(result); |
| } |
| // Fall through in order to accept lists encoded as JSON strings. |
| } |
| case base::Value::Type::DICTIONARY: { |
| // Dictionaries may be encoded as JSON strings. |
| if (value.GetAsString(&string_value)) { |
| std::unique_ptr<base::Value> result = |
| base::JSONReader::Read(string_value); |
| if (result && result->IsType(schema.type())) |
| return result; |
| } |
| break; |
| } |
| case base::Value::Type::STRING: |
| case base::Value::Type::BINARY: |
| // No conversion possible. |
| break; |
| } |
| |
| LOG(WARNING) << "Failed to convert " << value.GetType() |
| << " to " << schema.type(); |
| return nullptr; |
| } |
| #endif // #if defined(OS_WIN) |
| |
| } // namespace |
| |
| bool CaseInsensitiveStringCompare::operator()(const std::string& a, |
| const std::string& b) const { |
| return base::CompareCaseInsensitiveASCII(a, b) < 0; |
| } |
| |
| RegistryDict::RegistryDict() {} |
| |
| RegistryDict::~RegistryDict() { |
| ClearKeys(); |
| ClearValues(); |
| } |
| |
| RegistryDict* RegistryDict::GetKey(const std::string& name) { |
| KeyMap::iterator entry = keys_.find(name); |
| return entry != keys_.end() ? entry->second.get() : nullptr; |
| } |
| |
| const RegistryDict* RegistryDict::GetKey(const std::string& name) const { |
| KeyMap::const_iterator entry = keys_.find(name); |
| return entry != keys_.end() ? entry->second.get() : nullptr; |
| } |
| |
| void RegistryDict::SetKey(const std::string& name, |
| std::unique_ptr<RegistryDict> dict) { |
| if (!dict) { |
| RemoveKey(name); |
| return; |
| } |
| |
| keys_[name] = std::move(dict); |
| } |
| |
| std::unique_ptr<RegistryDict> RegistryDict::RemoveKey(const std::string& name) { |
| std::unique_ptr<RegistryDict> result; |
| KeyMap::iterator entry = keys_.find(name); |
| if (entry != keys_.end()) { |
| result = std::move(entry->second); |
| keys_.erase(entry); |
| } |
| return result; |
| } |
| |
| void RegistryDict::ClearKeys() { |
| keys_.clear(); |
| } |
| |
| base::Value* RegistryDict::GetValue(const std::string& name) { |
| ValueMap::iterator entry = values_.find(name); |
| return entry != values_.end() ? entry->second.get() : nullptr; |
| } |
| |
| const base::Value* RegistryDict::GetValue(const std::string& name) const { |
| ValueMap::const_iterator entry = values_.find(name); |
| return entry != values_.end() ? entry->second.get() : nullptr; |
| } |
| |
| void RegistryDict::SetValue(const std::string& name, |
| std::unique_ptr<base::Value> dict) { |
| if (!dict) { |
| RemoveValue(name); |
| return; |
| } |
| |
| values_[name] = std::move(dict); |
| } |
| |
| std::unique_ptr<base::Value> RegistryDict::RemoveValue( |
| const std::string& name) { |
| std::unique_ptr<base::Value> result; |
| ValueMap::iterator entry = values_.find(name); |
| if (entry != values_.end()) { |
| result = std::move(entry->second); |
| values_.erase(entry); |
| } |
| return result; |
| } |
| |
| void RegistryDict::ClearValues() { |
| values_.clear(); |
| } |
| |
| void RegistryDict::Merge(const RegistryDict& other) { |
| for (KeyMap::const_iterator entry(other.keys_.begin()); |
| entry != other.keys_.end(); ++entry) { |
| std::unique_ptr<RegistryDict>& subdict = keys_[entry->first]; |
| if (!subdict) |
| subdict = base::MakeUnique<RegistryDict>(); |
| subdict->Merge(*entry->second); |
| } |
| |
| for (ValueMap::const_iterator entry(other.values_.begin()); |
| entry != other.values_.end(); ++entry) { |
| SetValue(entry->first, entry->second->CreateDeepCopy()); |
| } |
| } |
| |
| void RegistryDict::Swap(RegistryDict* other) { |
| keys_.swap(other->keys_); |
| values_.swap(other->values_); |
| } |
| |
| #if defined(OS_WIN) |
| void RegistryDict::ReadRegistry(HKEY hive, const base::string16& root) { |
| ClearKeys(); |
| ClearValues(); |
| |
| // First, read all the values of the key. |
| for (RegistryValueIterator it(hive, root.c_str()); it.Valid(); ++it) { |
| const std::string name = base::UTF16ToUTF8(it.Name()); |
| switch (it.Type()) { |
| case REG_SZ: |
| case REG_EXPAND_SZ: |
| SetValue(name, std::unique_ptr<base::Value>( |
| new base::Value(base::UTF16ToUTF8(it.Value())))); |
| continue; |
| case REG_DWORD_LITTLE_ENDIAN: |
| case REG_DWORD_BIG_ENDIAN: |
| if (it.ValueSize() == sizeof(DWORD)) { |
| DWORD dword_value = *(reinterpret_cast<const DWORD*>(it.Value())); |
| if (it.Type() == REG_DWORD_BIG_ENDIAN) |
| dword_value = base::NetToHost32(dword_value); |
| else |
| dword_value = base::ByteSwapToLE32(dword_value); |
| SetValue(name, std::unique_ptr<base::Value>( |
| new base::Value(static_cast<int>(dword_value)))); |
| continue; |
| } |
| case REG_NONE: |
| case REG_LINK: |
| case REG_MULTI_SZ: |
| case REG_RESOURCE_LIST: |
| case REG_FULL_RESOURCE_DESCRIPTOR: |
| case REG_RESOURCE_REQUIREMENTS_LIST: |
| case REG_QWORD_LITTLE_ENDIAN: |
| // Unsupported type, message gets logged below. |
| break; |
| } |
| |
| LOG(WARNING) << "Failed to read hive " << hive << " at " |
| << root << "\\" << name |
| << " type " << it.Type(); |
| } |
| |
| // Recurse for all subkeys. |
| for (RegistryKeyIterator it(hive, root.c_str()); it.Valid(); ++it) { |
| std::string name(base::UTF16ToUTF8(it.Name())); |
| std::unique_ptr<RegistryDict> subdict(new RegistryDict()); |
| subdict->ReadRegistry(hive, root + L"\\" + it.Name()); |
| SetKey(name, std::move(subdict)); |
| } |
| } |
| |
| std::unique_ptr<base::Value> RegistryDict::ConvertToJSON( |
| const Schema& schema) const { |
| base::Value::Type type = |
| schema.valid() ? schema.type() : base::Value::Type::DICTIONARY; |
| switch (type) { |
| case base::Value::Type::DICTIONARY: { |
| std::unique_ptr<base::DictionaryValue> result( |
| new base::DictionaryValue()); |
| for (RegistryDict::ValueMap::const_iterator entry(values_.begin()); |
| entry != values_.end(); ++entry) { |
| Schema subschema = |
| schema.valid() ? schema.GetProperty(entry->first) : Schema(); |
| std::unique_ptr<base::Value> converted = |
| ConvertValue(*entry->second, subschema); |
| if (converted) |
| result->SetWithoutPathExpansion(entry->first, std::move(converted)); |
| } |
| for (RegistryDict::KeyMap::const_iterator entry(keys_.begin()); |
| entry != keys_.end(); ++entry) { |
| Schema subschema = |
| schema.valid() ? schema.GetProperty(entry->first) : Schema(); |
| std::unique_ptr<base::Value> converted = |
| entry->second->ConvertToJSON(subschema); |
| if (converted) |
| result->SetWithoutPathExpansion(entry->first, std::move(converted)); |
| } |
| return std::move(result); |
| } |
| case base::Value::Type::LIST: { |
| std::unique_ptr<base::ListValue> result(new base::ListValue()); |
| Schema item_schema = schema.valid() ? schema.GetItems() : Schema(); |
| for (RegistryDict::KeyMap::const_iterator entry(keys_.begin()); |
| entry != keys_.end(); ++entry) { |
| if (!IsKeyNumerical(entry->first)) |
| continue; |
| std::unique_ptr<base::Value> converted = |
| entry->second->ConvertToJSON(item_schema); |
| if (converted) |
| result->Append(std::move(converted)); |
| } |
| for (RegistryDict::ValueMap::const_iterator entry(values_.begin()); |
| entry != values_.end(); ++entry) { |
| if (!IsKeyNumerical(entry->first)) |
| continue; |
| std::unique_ptr<base::Value> converted = |
| ConvertValue(*entry->second, item_schema); |
| if (converted) |
| result->Append(std::move(converted)); |
| } |
| return std::move(result); |
| } |
| default: |
| LOG(WARNING) << "Can't convert registry key to schema type " << type; |
| } |
| |
| return nullptr; |
| } |
| #endif // #if defined(OS_WIN) |
| } // namespace policy |