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/*
* Copyright (C) 2018 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef TOOLS_AAPT2_OPTIMIZE_OBFUSCATOR_H_
#define TOOLS_AAPT2_OPTIMIZE_OBFUSCATOR_H_
#include <set>
#include <string>
#include "ResourceMetadata.pb.h"
#include "ResourceTable.h"
#include "android-base/function_ref.h"
#include "android-base/macros.h"
#include "cmd/Optimize.h"
#include "format/binary/TableFlattener.h"
#include "process/IResourceTableConsumer.h"
namespace aapt {
class ResourceTable;
// Maps resources in the apk to shortened paths.
class Obfuscator : public IResourceTableConsumer {
public:
explicit Obfuscator(OptimizeOptions& optimizeOptions);
bool Consume(IAaptContext* context, ResourceTable* table) override;
bool WriteObfuscationMap(const std::string& file_path) const;
bool IsEnabled() const;
enum class Result { Obfuscated, Keep_ExemptionList, Keep_Overlayable };
// hardcoded string uses characters which make it an invalid resource name
static constexpr char kObfuscatedResourceName[] = "0_resource_name_obfuscated";
static void ObfuscateResourceName(
const bool collapse_key_stringpool, const std::set<ResourceName>& name_collapse_exemptions,
const ResourceNamedType& type_name, const ResourceTableEntryView& entry,
const android::base::function_ref<void(Result, const ResourceName&)> onObfuscate);
protected:
virtual std::string ShortenFileName(android::StringPiece file_path, int output_length);
private:
bool HandleShortenFilePaths(ResourceTable* table,
std::map<std::string, std::string>& shortened_path_map,
const std::set<ResourceName>& path_shorten_exemptions);
TableFlattenerOptions& options_;
const bool shorten_resource_paths_;
const bool collapse_key_stringpool_;
DISALLOW_COPY_AND_ASSIGN(Obfuscator);
};
} // namespace aapt
#endif // TOOLS_AAPT2_OPTIMIZE_OBFUSCATOR_H_
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