1 // 2 // Copyright (C) 2018 The Android Open Source Project 3 // 4 // Licensed under the Apache License, Version 2.0 (the "License"); 5 // you may not use this file except in compliance with the License. 6 // You may obtain a copy of the License at 7 // 8 // http://www.apache.org/licenses/LICENSE-2.0 9 // 10 // Unless required by applicable law or agreed to in writing, software 11 // distributed under the License is distributed on an "AS IS" BASIS, 12 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 // See the License for the specific language governing permissions and 14 // limitations under the License. 15 // 16 17 #ifndef UPDATE_ENGINE_PAYLOAD_CONSUMER_VERITY_WRITER_INTERFACE_H_ 18 #define UPDATE_ENGINE_PAYLOAD_CONSUMER_VERITY_WRITER_INTERFACE_H_ 19 20 #include <cstdint> 21 #include <memory> 22 23 #include <base/macros.h> 24 25 #include "payload_consumer/file_descriptor.h" 26 #include "update_engine/payload_consumer/install_plan.h" 27 28 namespace chromeos_update_engine { 29 30 class VerityWriterInterface { 31 public: 32 virtual ~VerityWriterInterface() = default; 33 34 virtual bool Init(const InstallPlan::Partition& partition) = 0; 35 // Update partition data at [offset : offset + size) stored in |buffer|. 36 // Data not in |hash_tree_data_extent| or |fec_data_extent| is ignored. 37 // Will write verity data to the target partition once all the necessary 38 // blocks has passed. 39 virtual bool Update(uint64_t offset, const uint8_t* buffer, size_t size) = 0; 40 41 // Write hash tree && FEC data to underlying fd, if they are present 42 virtual bool Finalize(FileDescriptorPtr read_fd, 43 FileDescriptorPtr write_fd) = 0; 44 45 protected: 46 VerityWriterInterface() = default; 47 48 private: 49 DISALLOW_COPY_AND_ASSIGN(VerityWriterInterface); 50 }; 51 52 namespace verity_writer { 53 std::unique_ptr<VerityWriterInterface> CreateVerityWriter(); 54 } 55 56 } // namespace chromeos_update_engine 57 58 #endif // UPDATE_ENGINE_PAYLOAD_CONSUMER_VERITY_WRITER_INTERFACE_H_ 59