chrome/browser/policy/registry_dict_win.cc - platform/external/chromium_org - Git at Google

 // 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 "chrome/browser/policy/registry_dict_win.h"

 #include "base/json/json_reader.h"
 #include "base/stl_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"
 #include "base/win/registry.h"
 #include "components/json_schema/json_schema_constants.h"

 namespace schema = json_schema_constants;

 using base::win::RegistryKeyIterator;
 using base::win::RegistryValueIterator;

 namespace policy {

 namespace {

 // Returns the entry with key |name| in |dictionary| (can be NULL), or NULL.
 const base::DictionaryValue* GetEntry(const base::DictionaryValue* dictionary,
                                       const std::string& name) {
   if (!dictionary)
     return NULL;
   const base::DictionaryValue* entry = NULL;
   dictionary->GetDictionaryWithoutPathExpansion(name, &entry);
   return entry;
 }

 // Returns the Value type described in |schema|, or |default_type| if not found.
 base::Value::Type GetValueTypeForSchema(const base::DictionaryValue* schema,
                                         base::Value::Type default_type) {
   // JSON-schema types to base::Value::Type mapping.
   static const struct {
     // JSON schema type.
     const char* schema_type;
     // Correspondent value type.
     base::Value::Type value_type;
   } kSchemaToValueTypeMap[] = {
     { schema::kArray,        base::Value::TYPE_LIST        },
     { schema::kBoolean,      base::Value::TYPE_BOOLEAN     },
     { schema::kInteger,      base::Value::TYPE_INTEGER     },
     { schema::kNull,         base::Value::TYPE_NULL        },
     { schema::kNumber,       base::Value::TYPE_DOUBLE      },
     { schema::kObject,       base::Value::TYPE_DICTIONARY  },
     { schema::kString,       base::Value::TYPE_STRING      },
   };

   if (!schema)
     return default_type;
   std::string type;
   if (!schema->GetStringWithoutPathExpansion(schema::kType, &type))
     return default_type;
   for (size_t i = 0; i < arraysize(kSchemaToValueTypeMap); ++i) {
     if (type == kSchemaToValueTypeMap[i].schema_type)
       return kSchemaToValueTypeMap[i].value_type;
   }
   return default_type;
 }

 // Returns the schema for property |name| given the |schema| of an object.
 // Returns the "additionalProperties" schema if no specific schema for
 // |name| is present. Returns NULL if no schema is found.
 const base::DictionaryValue* GetSchemaFor(const base::DictionaryValue* schema,
                                           const std::string& name) {
   const base::DictionaryValue* properties =
       GetEntry(schema, schema::kProperties);
   const base::DictionaryValue* sub_schema = GetEntry(properties, name);
   if (sub_schema)
     return sub_schema;
   // "additionalProperties" can be a boolean, but that case is ignored.
   return GetEntry(schema, schema::kAdditionalProperties);
 }

 // 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.
 scoped_ptr<base::Value> ConvertValue(const base::Value& value,
                                      const base::DictionaryValue* schema) {
   // Figure out the type to convert to from the schema.
   const base::Value::Type result_type(
       GetValueTypeForSchema(schema, value.GetType()));

   // If the type is good already, go with it.
   if (value.IsType(result_type)) {
     // Recurse for complex types if there is a schema.
     if (schema) {
       const base::DictionaryValue* dict = NULL;
       const base::ListValue* list = NULL;
       if (value.GetAsDictionary(&dict)) {
         scoped_ptr<base::DictionaryValue> result(new base::DictionaryValue());
         for (base::DictionaryValue::Iterator entry(*dict); !entry.IsAtEnd();
              entry.Advance()) {
           scoped_ptr<base::Value> converted_value(
               ConvertValue(entry.value(), GetSchemaFor(schema, entry.key())));
           result->SetWithoutPathExpansion(entry.key(),
                                           converted_value.release());
         }
         return result.Pass();
       } else if (value.GetAsList(&list)) {
         scoped_ptr<base::ListValue> result(new base::ListValue());
         const base::DictionaryValue* item_schema =
             GetEntry(schema, schema::kItems);
         for (base::ListValue::const_iterator entry(list->begin());
              entry != list->end(); ++entry) {
           result->Append(ConvertValue(**entry, item_schema).release());
         }
         return result.Pass();
       }
     }
     return make_scoped_ptr(value.DeepCopy());
   }

   // Else, do some conversions to map windows registry data types to JSON types.
   std::string string_value;
   int int_value = 0;
   switch (result_type) {
     case base::Value::TYPE_NULL: {
       return make_scoped_ptr(base::Value::CreateNullValue());
     }
     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 make_scoped_ptr(Value::CreateBooleanValue(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 make_scoped_ptr(base::Value::CreateIntegerValue(int_value));
       }
       break;
     }
     case base::Value::TYPE_DOUBLE: {
       // Doubles may be string-encoded or integer-encoded.
       double double_value = 0;
       if (value.GetAsInteger(&int_value)) {
         return make_scoped_ptr(base::Value::CreateDoubleValue(int_value));
       } else if (value.GetAsString(&string_value) &&
                  base::StringToDouble(string_value, &double_value)) {
         return make_scoped_ptr(base::Value::CreateDoubleValue(double_value));
       }
       break;
     }
     case base::Value::TYPE_LIST: {
       // Lists are encoded as subkeys with numbered value in the registry.
       const base::DictionaryValue* dict = NULL;
       if (value.GetAsDictionary(&dict)) {
         scoped_ptr<base::ListValue> result(new base::ListValue());
         const base::DictionaryValue* item_schema =
             GetEntry(schema, schema::kItems);
         for (int i = 1; ; ++i) {
           const base::Value* entry = NULL;
           if (!dict->Get(base::IntToString(i), &entry))
             break;
           result->Append(ConvertValue(*entry, item_schema).release());
         }
         return result.Pass();
       }
       // 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)) {
         scoped_ptr<base::Value> result(base::JSONReader::Read(string_value));
         if (result && result->IsType(result_type))
           return result.Pass();
       }
       break;
     }
     case base::Value::TYPE_STRING:
     case base::Value::TYPE_BINARY:
       // No conversion possible.
       break;
   }

   LOG(WARNING) << "Failed to convert " << value.GetType()
                << " to " << result_type;
   return make_scoped_ptr(base::Value::CreateNullValue());
 }

 }  // namespace

 bool CaseInsensitiveStringCompare::operator()(const std::string& a,
                                               const std::string& b) const {
   return base::strcasecmp(a.c_str(), b.c_str()) < 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 : NULL;
 }

 const RegistryDict* RegistryDict::GetKey(const std::string& name) const {
   KeyMap::const_iterator entry = keys_.find(name);
   return entry != keys_.end() ? entry->second : NULL;
 }

 void RegistryDict::SetKey(const std::string& name,
                           scoped_ptr<RegistryDict> dict) {
   if (!dict) {
     RemoveKey(name);
     return;
   }

   RegistryDict*& entry = keys_[name];
   delete entry;
   entry = dict.release();
 }

 scoped_ptr<RegistryDict> RegistryDict::RemoveKey(const std::string& name) {
   scoped_ptr<RegistryDict> result;
   KeyMap::iterator entry = keys_.find(name);
   if (entry != keys_.end()) {
     result.reset(entry->second);
     keys_.erase(entry);
   }
   return result.Pass();
 }

 void RegistryDict::ClearKeys() {
   STLDeleteValues(&keys_);
 }

 base::Value* RegistryDict::GetValue(const std::string& name) {
   ValueMap::iterator entry = values_.find(name);
   return entry != values_.end() ? entry->second : NULL;
 }

 const base::Value* RegistryDict::GetValue(const std::string& name) const {
   ValueMap::const_iterator entry = values_.find(name);
   return entry != values_.end() ? entry->second : NULL;
 }

 void RegistryDict::SetValue(const std::string& name,
                             scoped_ptr<base::Value> dict) {
   if (!dict) {
     RemoveValue(name);
     return;
   }

   Value*& entry = values_[name];
   delete entry;
   entry = dict.release();
 }

 scoped_ptr<base::Value> RegistryDict::RemoveValue(const std::string& name) {
   scoped_ptr<base::Value> result;
   ValueMap::iterator entry = values_.find(name);
   if (entry != values_.end()) {
     result.reset(entry->second);
     values_.erase(entry);
   }
   return result.Pass();
 }

 void RegistryDict::ClearValues() {
   STLDeleteValues(&values_);
 }

 void RegistryDict::Merge(const RegistryDict& other) {
   for (KeyMap::const_iterator entry(other.keys_.begin());
        entry != other.keys_.end(); ++entry) {
     RegistryDict*& subdict = keys_[entry->first];
     if (!subdict)
       subdict = new RegistryDict();
     subdict->Merge(*entry->second);
   }

   for (ValueMap::const_iterator entry(other.values_.begin());
        entry != other.values_.end(); ++entry) {
     SetValue(entry->first, make_scoped_ptr(entry->second->DeepCopy()));
   }
 }

 void RegistryDict::Swap(RegistryDict* other) {
   keys_.swap(other->keys_);
   values_.swap(other->values_);
 }

 void RegistryDict::ReadRegistry(HKEY hive, const 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 = UTF16ToUTF8(it.Name());
     switch (it.Type()) {
       case REG_SZ:
       case REG_EXPAND_SZ:
         SetValue(
             name,
             make_scoped_ptr(new base::StringValue(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,
               make_scoped_ptr(base::Value::CreateIntegerValue(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(UTF16ToUTF8(it.Name()));
     scoped_ptr<RegistryDict> subdict(new RegistryDict());
     subdict->ReadRegistry(hive, root + L"\\" + it.Name());
     SetKey(name, subdict.Pass());
   }
 }

 scoped_ptr<base::Value> RegistryDict::ConvertToJSON(
     const base::DictionaryValue* schema) const {
   base::Value::Type type =
       GetValueTypeForSchema(schema, base::Value::TYPE_DICTIONARY);
   switch (type) {
     case base::Value::TYPE_DICTIONARY: {
       scoped_ptr<base::DictionaryValue> result(new base::DictionaryValue());
       for (RegistryDict::ValueMap::const_iterator entry(values_.begin());
            entry != values_.end(); ++entry) {
         result->SetWithoutPathExpansion(
             entry->first,
             ConvertValue(*entry->second,
                          GetSchemaFor(schema, entry->first)).release());
       }
       for (RegistryDict::KeyMap::const_iterator entry(keys_.begin());
            entry != keys_.end(); ++entry) {
         result->SetWithoutPathExpansion(
             entry->first,
             entry->second->ConvertToJSON(
                 GetSchemaFor(schema, entry->first)).release());
       }
       return result.Pass();
     }
     case base::Value::TYPE_LIST: {
       scoped_ptr<base::ListValue> result(new base::ListValue());
       const base::DictionaryValue* item_schema =
           GetEntry(schema, schema::kItems);
       for (int i = 1; ; ++i) {
         const std::string name(base::IntToString(i));
         const RegistryDict* key = GetKey(name);
         if (key) {
           result->Append(key->ConvertToJSON(item_schema).release());
           continue;
         }
         const base::Value* value = GetValue(name);
         if (value) {
           result->Append(ConvertValue(*value, item_schema).release());
           continue;
         }
         break;
       }
       return result.Pass();
     }
     default:
       LOG(WARNING) << "Can't convert registry key to schema type " << type;
   }

   return make_scoped_ptr(base::Value::CreateNullValue());
 }

 }  // namespace policy
	// 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 "chrome/browser/policy/registry_dict_win.h"

	#include "base/json/json_reader.h"
	#include "base/stl_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"
	#include "base/win/registry.h"
	#include "components/json_schema/json_schema_constants.h"

	namespace schema = json_schema_constants;

	using base::win::RegistryKeyIterator;
	using base::win::RegistryValueIterator;

	namespace policy {

	namespace {

	// Returns the entry with key \|name\| in \|dictionary\| (can be NULL), or NULL.
	const base::DictionaryValue* GetEntry(const base::DictionaryValue* dictionary,
	const std::string& name) {
	if (!dictionary)
	return NULL;
	const base::DictionaryValue* entry = NULL;
	dictionary->GetDictionaryWithoutPathExpansion(name, &entry);
	return entry;
	}

	// Returns the Value type described in \|schema\|, or \|default_type\| if not found.
	base::Value::Type GetValueTypeForSchema(const base::DictionaryValue* schema,
	base::Value::Type default_type) {
	// JSON-schema types to base::Value::Type mapping.
	static const struct {
	// JSON schema type.
	const char* schema_type;
	// Correspondent value type.
	base::Value::Type value_type;
	} kSchemaToValueTypeMap[] = {
	{ schema::kArray, base::Value::TYPE_LIST },
	{ schema::kBoolean, base::Value::TYPE_BOOLEAN },
	{ schema::kInteger, base::Value::TYPE_INTEGER },
	{ schema::kNull, base::Value::TYPE_NULL },
	{ schema::kNumber, base::Value::TYPE_DOUBLE },
	{ schema::kObject, base::Value::TYPE_DICTIONARY },
	{ schema::kString, base::Value::TYPE_STRING },
	};

	if (!schema)
	return default_type;
	std::string type;
	if (!schema->GetStringWithoutPathExpansion(schema::kType, &type))
	return default_type;
	for (size_t i = 0; i < arraysize(kSchemaToValueTypeMap); ++i) {
	if (type == kSchemaToValueTypeMap[i].schema_type)
	return kSchemaToValueTypeMap[i].value_type;
	}
	return default_type;
	}

	// Returns the schema for property \|name\| given the \|schema\| of an object.
	// Returns the "additionalProperties" schema if no specific schema for
	// \|name\| is present. Returns NULL if no schema is found.
	const base::DictionaryValue* GetSchemaFor(const base::DictionaryValue* schema,
	const std::string& name) {
	const base::DictionaryValue* properties =
	GetEntry(schema, schema::kProperties);
	const base::DictionaryValue* sub_schema = GetEntry(properties, name);
	if (sub_schema)
	return sub_schema;
	// "additionalProperties" can be a boolean, but that case is ignored.
	return GetEntry(schema, schema::kAdditionalProperties);
	}

	// 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.
	scoped_ptr<base::Value> ConvertValue(const base::Value& value,
	const base::DictionaryValue* schema) {
	// Figure out the type to convert to from the schema.
	const base::Value::Type result_type(
	GetValueTypeForSchema(schema, value.GetType()));

	// If the type is good already, go with it.
	if (value.IsType(result_type)) {
	// Recurse for complex types if there is a schema.
	if (schema) {
	const base::DictionaryValue* dict = NULL;
	const base::ListValue* list = NULL;
	if (value.GetAsDictionary(&dict)) {
	scoped_ptr<base::DictionaryValue> result(new base::DictionaryValue());
	for (base::DictionaryValue::Iterator entry(*dict); !entry.IsAtEnd();
	entry.Advance()) {
	scoped_ptr<base::Value> converted_value(
	ConvertValue(entry.value(), GetSchemaFor(schema, entry.key())));
	result->SetWithoutPathExpansion(entry.key(),
	converted_value.release());
	}
	return result.Pass();
	} else if (value.GetAsList(&list)) {
	scoped_ptr<base::ListValue> result(new base::ListValue());
	const base::DictionaryValue* item_schema =
	GetEntry(schema, schema::kItems);
	for (base::ListValue::const_iterator entry(list->begin());
	entry != list->end(); ++entry) {
	result->Append(ConvertValue(**entry, item_schema).release());
	}
	return result.Pass();
	}
	}
	return make_scoped_ptr(value.DeepCopy());
	}

	// Else, do some conversions to map windows registry data types to JSON types.
	std::string string_value;
	int int_value = 0;
	switch (result_type) {
	case base::Value::TYPE_NULL: {
	return make_scoped_ptr(base::Value::CreateNullValue());
	}
	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 make_scoped_ptr(Value::CreateBooleanValue(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 make_scoped_ptr(base::Value::CreateIntegerValue(int_value));
	}
	break;
	}
	case base::Value::TYPE_DOUBLE: {
	// Doubles may be string-encoded or integer-encoded.
	double double_value = 0;
	if (value.GetAsInteger(&int_value)) {
	return make_scoped_ptr(base::Value::CreateDoubleValue(int_value));
	} else if (value.GetAsString(&string_value) &&
	base::StringToDouble(string_value, &double_value)) {
	return make_scoped_ptr(base::Value::CreateDoubleValue(double_value));
	}
	break;
	}
	case base::Value::TYPE_LIST: {
	// Lists are encoded as subkeys with numbered value in the registry.
	const base::DictionaryValue* dict = NULL;
	if (value.GetAsDictionary(&dict)) {
	scoped_ptr<base::ListValue> result(new base::ListValue());
	const base::DictionaryValue* item_schema =
	GetEntry(schema, schema::kItems);
	for (int i = 1; ; ++i) {
	const base::Value* entry = NULL;
	if (!dict->Get(base::IntToString(i), &entry))
	break;
	result->Append(ConvertValue(*entry, item_schema).release());
	}
	return result.Pass();
	}
	// 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)) {
	scoped_ptr<base::Value> result(base::JSONReader::Read(string_value));
	if (result && result->IsType(result_type))
	return result.Pass();
	}
	break;
	}
	case base::Value::TYPE_STRING:
	case base::Value::TYPE_BINARY:
	// No conversion possible.
	break;
	}

	LOG(WARNING) << "Failed to convert " << value.GetType()
	<< " to " << result_type;
	return make_scoped_ptr(base::Value::CreateNullValue());
	}

	} // namespace

	bool CaseInsensitiveStringCompare::operator()(const std::string& a,
	const std::string& b) const {
	return base::strcasecmp(a.c_str(), b.c_str()) < 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 : NULL;
	}

	const RegistryDict* RegistryDict::GetKey(const std::string& name) const {
	KeyMap::const_iterator entry = keys_.find(name);
	return entry != keys_.end() ? entry->second : NULL;
	}

	void RegistryDict::SetKey(const std::string& name,
	scoped_ptr<RegistryDict> dict) {
	if (!dict) {
	RemoveKey(name);
	return;
	}

	RegistryDict*& entry = keys_[name];
	delete entry;
	entry = dict.release();
	}

	scoped_ptr<RegistryDict> RegistryDict::RemoveKey(const std::string& name) {
	scoped_ptr<RegistryDict> result;
	KeyMap::iterator entry = keys_.find(name);
	if (entry != keys_.end()) {
	result.reset(entry->second);
	keys_.erase(entry);
	}
	return result.Pass();
	}

	void RegistryDict::ClearKeys() {
	STLDeleteValues(&keys_);
	}

	base::Value* RegistryDict::GetValue(const std::string& name) {
	ValueMap::iterator entry = values_.find(name);
	return entry != values_.end() ? entry->second : NULL;
	}

	const base::Value* RegistryDict::GetValue(const std::string& name) const {
	ValueMap::const_iterator entry = values_.find(name);
	return entry != values_.end() ? entry->second : NULL;
	}

	void RegistryDict::SetValue(const std::string& name,
	scoped_ptr<base::Value> dict) {
	if (!dict) {
	RemoveValue(name);
	return;
	}

	Value*& entry = values_[name];
	delete entry;
	entry = dict.release();
	}

	scoped_ptr<base::Value> RegistryDict::RemoveValue(const std::string& name) {
	scoped_ptr<base::Value> result;
	ValueMap::iterator entry = values_.find(name);
	if (entry != values_.end()) {
	result.reset(entry->second);
	values_.erase(entry);
	}
	return result.Pass();
	}

	void RegistryDict::ClearValues() {
	STLDeleteValues(&values_);
	}

	void RegistryDict::Merge(const RegistryDict& other) {
	for (KeyMap::const_iterator entry(other.keys_.begin());
	entry != other.keys_.end(); ++entry) {
	RegistryDict*& subdict = keys_[entry->first];
	if (!subdict)
	subdict = new RegistryDict();
	subdict->Merge(*entry->second);
	}

	for (ValueMap::const_iterator entry(other.values_.begin());
	entry != other.values_.end(); ++entry) {
	SetValue(entry->first, make_scoped_ptr(entry->second->DeepCopy()));
	}
	}

	void RegistryDict::Swap(RegistryDict* other) {
	keys_.swap(other->keys_);
	values_.swap(other->values_);
	}

	void RegistryDict::ReadRegistry(HKEY hive, const 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 = UTF16ToUTF8(it.Name());
	switch (it.Type()) {
	case REG_SZ:
	case REG_EXPAND_SZ:
	SetValue(
	name,
	make_scoped_ptr(new base::StringValue(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,
	make_scoped_ptr(base::Value::CreateIntegerValue(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(UTF16ToUTF8(it.Name()));
	scoped_ptr<RegistryDict> subdict(new RegistryDict());
	subdict->ReadRegistry(hive, root + L"\\" + it.Name());
	SetKey(name, subdict.Pass());
	}
	}

	scoped_ptr<base::Value> RegistryDict::ConvertToJSON(
	const base::DictionaryValue* schema) const {
	base::Value::Type type =
	GetValueTypeForSchema(schema, base::Value::TYPE_DICTIONARY);
	switch (type) {
	case base::Value::TYPE_DICTIONARY: {
	scoped_ptr<base::DictionaryValue> result(new base::DictionaryValue());
	for (RegistryDict::ValueMap::const_iterator entry(values_.begin());
	entry != values_.end(); ++entry) {
	result->SetWithoutPathExpansion(
	entry->first,
	ConvertValue(*entry->second,
	GetSchemaFor(schema, entry->first)).release());
	}
	for (RegistryDict::KeyMap::const_iterator entry(keys_.begin());
	entry != keys_.end(); ++entry) {
	result->SetWithoutPathExpansion(
	entry->first,
	entry->second->ConvertToJSON(
	GetSchemaFor(schema, entry->first)).release());
	}
	return result.Pass();
	}
	case base::Value::TYPE_LIST: {
	scoped_ptr<base::ListValue> result(new base::ListValue());
	const base::DictionaryValue* item_schema =
	GetEntry(schema, schema::kItems);
	for (int i = 1; ; ++i) {
	const std::string name(base::IntToString(i));
	const RegistryDict* key = GetKey(name);
	if (key) {
	result->Append(key->ConvertToJSON(item_schema).release());
	continue;
	}
	const base::Value* value = GetValue(name);
	if (value) {
	result->Append(ConvertValue(*value, item_schema).release());
	continue;
	}
	break;
	}
	return result.Pass();
	}
	default:
	LOG(WARNING) << "Can't convert registry key to schema type " << type;
	}

	return make_scoped_ptr(base::Value::CreateNullValue());
	}

	} // namespace policy