| /* |
| * Copyright (C) 2016 The Android Open Source Project |
| * |
| * Permission is hereby granted, free of charge, to any person |
| * obtaining a copy of this software and associated documentation |
| * files (the "Software"), to deal in the Software without |
| * restriction, including without limitation the rights to use, copy, |
| * modify, merge, publish, distribute, sublicense, and/or sell copies |
| * of the Software, and to permit persons to whom the Software is |
| * furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be |
| * included in all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
| * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
| * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
| * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| * SOFTWARE. |
| */ |
| |
| #pragma once |
| |
| #include <string> |
| #include <vector> |
| |
| #include <fs_avb/types.h> |
| #include <fstab/fstab.h> |
| #include <libavb/libavb.h> |
| |
| namespace android { |
| namespace fs_mgr { |
| |
| // This class provides C++ bindings to interact with libavb, a small |
| // self-contained piece of code that's intended to be used in bootloaders. |
| // It mainly contains two functions: |
| // - ReadFromPartition(): to read AVB metadata from a given partition. |
| // It provides the implementation of AvbOps.read_from_partition() when |
| // reading metadata through libavb. |
| // - AvbSlotVerify(): the C++ binding of libavb->avb_slot_verify() to |
| // read and verify the metadata and store it into the out_data parameter. |
| // The caller MUST check the integrity of metadata against the |
| // androidboot.vbmeta.{hash_alg, size, digest} values from /proc/cmdline. |
| // e.g., see class AvbVerifier for more details. |
| // |
| class FsManagerAvbOps { |
| public: |
| explicit FsManagerAvbOps(const std::string& slot_suffix = {}); |
| |
| static FsManagerAvbOps* GetInstanceFromAvbOps(AvbOps* ops) { |
| return reinterpret_cast<FsManagerAvbOps*>(ops->user_data); |
| } |
| |
| AvbIOResult ReadFromPartition(const char* partition, int64_t offset, size_t num_bytes, |
| void* buffer, size_t* out_num_read); |
| AvbIOResult GetSizeOfPartition(const char* partition, uint64_t* out_size_num_byte); |
| |
| AvbSlotVerifyResult AvbSlotVerify(const std::string& ab_suffix, AvbSlotVerifyFlags flags, |
| std::vector<VBMetaData>* out_vbmeta_images); |
| |
| private: |
| std::string GetLogicalPath(const std::string& partition_name); |
| std::string GetPartitionPath(const char* partition_name); |
| AvbOps avb_ops_; |
| Fstab fstab_; |
| std::string slot_suffix_; |
| }; |
| |
| } // namespace fs_mgr |
| } // namespace android |