1 /* 2 * Copyright (C) 2008 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 _APPLYPATCH_H 18 #define _APPLYPATCH_H 19 20 #include <sys/stat.h> 21 22 #include <vector> 23 24 #include "openssl/sha.h" 25 #include "edify/expr.h" 26 27 struct FileContents { 28 uint8_t sha1[SHA_DIGEST_LENGTH]; 29 std::vector<unsigned char> data; 30 struct stat st; 31 }; 32 33 // When there isn't enough room on the target filesystem to hold the 34 // patched version of the file, we copy the original here and delete 35 // it to free up space. If the expected source file doesn't exist, or 36 // is corrupted, we look to see if this file contains the bits we want 37 // and use it as the source instead. 38 #define CACHE_TEMP_SOURCE "/cache/saved.file" 39 40 typedef ssize_t (*SinkFn)(const unsigned char*, ssize_t, void*); 41 42 // applypatch.c 43 int ShowLicenses(); 44 size_t FreeSpaceForFile(const char* filename); 45 int CacheSizeCheck(size_t bytes); 46 int ParseSha1(const char* str, uint8_t* digest); 47 48 int applypatch_flash(const char* source_filename, const char* target_filename, 49 const char* target_sha1_str, size_t target_size); 50 int applypatch(const char* source_filename, 51 const char* target_filename, 52 const char* target_sha1_str, 53 size_t target_size, 54 int num_patches, 55 char** const patch_sha1_str, 56 Value** patch_data, 57 Value* bonus_data); 58 int applypatch_check(const char* filename, 59 int num_patches, 60 char** const patch_sha1_str); 61 62 int LoadFileContents(const char* filename, FileContents* file); 63 int SaveFileContents(const char* filename, const FileContents* file); 64 void FreeFileContents(FileContents* file); 65 int FindMatchingPatch(uint8_t* sha1, char* const * const patch_sha1_str, 66 int num_patches); 67 68 // bsdiff.cpp 69 void ShowBSDiffLicense(); 70 int ApplyBSDiffPatch(const unsigned char* old_data, ssize_t old_size, 71 const Value* patch, ssize_t patch_offset, 72 SinkFn sink, void* token, SHA_CTX* ctx); 73 int ApplyBSDiffPatchMem(const unsigned char* old_data, ssize_t old_size, 74 const Value* patch, ssize_t patch_offset, 75 std::vector<unsigned char>* new_data); 76 77 // imgpatch.cpp 78 int ApplyImagePatch(const unsigned char* old_data, ssize_t old_size, 79 const Value* patch, 80 SinkFn sink, void* token, SHA_CTX* ctx, 81 const Value* bonus_data); 82 83 // freecache.cpp 84 int MakeFreeSpaceOnCache(size_t bytes_needed); 85 86 #endif 87