67 lines
2.6 KiB
C++
67 lines
2.6 KiB
C++
//
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// Copyright (C) 2017 The Android Open Source Project
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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#ifndef UPDATE_ENGINE_PAYLOAD_CONSUMER_FILE_DESCRIPTOR_UTILS_H_
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#define UPDATE_ENGINE_PAYLOAD_CONSUMER_FILE_DESCRIPTOR_UTILS_H_
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#include <brillo/secure_blob.h>
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#include "update_engine/payload_consumer/extent_writer.h"
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#include "update_engine/payload_consumer/file_descriptor.h"
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#include "update_engine/update_metadata.pb.h"
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namespace chromeos_update_engine {
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namespace fd_utils {
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bool CommonHashExtents(
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FileDescriptorPtr source,
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const google::protobuf::RepeatedPtrField<Extent>& src_extents,
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ExtentWriter* writer,
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uint64_t block_size,
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brillo::Blob* hash_out);
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// Copy blocks from the |source| file to the |target| file and hashes the
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// contents. The blocks to copy from the |source| to the |target| files are
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// specified by the |src_extents| and |tgt_extents| list of Extents, which
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// must have the same length in number of blocks. Stores the hash of the
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// copied blocks in Blob pointed by |hash_out| if not null. The block size
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// is passed as |block_size|. In case of error reading or writing, returns
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// false and the value pointed by |hash_out| is undefined.
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// The |source| and |target| files must be different, or otherwise |src_extents|
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// and |tgt_extents| must not overlap.
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bool CopyAndHashExtents(
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FileDescriptorPtr source,
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const google::protobuf::RepeatedPtrField<Extent>& src_extents,
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FileDescriptorPtr target,
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const google::protobuf::RepeatedPtrField<Extent>& tgt_extents,
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uint64_t block_size,
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brillo::Blob* hash_out);
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// Reads blocks from |source| and calculates the hash. The blocks to read are
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// specified by |extents|. Stores the hash in |hash_out| if it is not null. The
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// block sizes are passed as |block_size|. In case of error reading, it returns
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// false and the value pointed by |hash_out| is undefined.
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bool ReadAndHashExtents(
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FileDescriptorPtr source,
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const google::protobuf::RepeatedPtrField<Extent>& extents,
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uint64_t block_size,
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brillo::Blob* hash_out);
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} // namespace fd_utils
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} // namespace chromeos_update_engine
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#endif // UPDATE_ENGINE_PAYLOAD_CONSUMER_FILE_DESCRIPTOR_UTILS_H_
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