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88 lines
3.8 KiB
88 lines
3.8 KiB
4 months ago
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/*
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* Copyright (C) 2008 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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// This file is a nearly line-for-line copy of bspatch.c from the
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// bsdiff-4.3 distribution; the primary differences being how the
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// input and output data are read and the error handling. Running
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// applypatch with the -l option will display the bsdiff license
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// notice.
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#include <stdio.h>
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#include <sys/types.h>
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#include <string>
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#include <android-base/logging.h>
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#include <bsdiff/bspatch.h>
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#include <openssl/sha.h>
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#include "applypatch/applypatch.h"
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#include "edify/expr.h"
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#include "otautil/print_sha1.h"
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void ShowBSDiffLicense() {
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puts("The bsdiff library used herein is:\n"
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"\n"
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"Copyright 2003-2005 Colin Percival\n"
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"All rights reserved\n"
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"\n"
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"Redistribution and use in source and binary forms, with or without\n"
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"modification, are permitted providing that the following conditions\n"
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"are met:\n"
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"1. Redistributions of source code must retain the above copyright\n"
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" notice, this list of conditions and the following disclaimer.\n"
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"2. Redistributions in binary form must reproduce the above copyright\n"
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" notice, this list of conditions and the following disclaimer in the\n"
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" documentation and/or other materials provided with the distribution.\n"
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"\n"
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"THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR\n"
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"IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED\n"
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"WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE\n"
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"ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY\n"
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"DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL\n"
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"DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS\n"
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"OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)\n"
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"HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,\n"
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"STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING\n"
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"IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE\n"
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"POSSIBILITY OF SUCH DAMAGE.\n"
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"\n------------------\n\n"
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"This program uses Julian R Seward's \"libbzip2\" library, available\n"
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"from http://www.bzip.org/.\n"
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);
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}
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int ApplyBSDiffPatch(const unsigned char* old_data, size_t old_size, const Value& patch,
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size_t patch_offset, SinkFn sink) {
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CHECK_LE(patch_offset, patch.data.size());
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int result = bsdiff::bspatch(old_data, old_size,
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reinterpret_cast<const uint8_t*>(&patch.data[patch_offset]),
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patch.data.size() - patch_offset, sink);
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if (result != 0) {
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LOG(ERROR) << "bspatch failed, result: " << result;
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// print SHA1 of the patch in the case of a data error.
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if (result == 2) {
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uint8_t digest[SHA_DIGEST_LENGTH];
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SHA1(reinterpret_cast<const uint8_t*>(patch.data.data() + patch_offset),
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patch.data.size() - patch_offset, digest);
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std::string patch_sha1 = print_sha1(digest);
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LOG(ERROR) << "Patch may be corrupted, offset: " << patch_offset << ", SHA1: " << patch_sha1;
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}
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}
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return result;
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}
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