Adam Lesinski | 7ad1110 | 2016-10-28 16:39:15 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2016 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 | #define ATRACE_TAG ATRACE_TAG_RESOURCES |
| 18 | |
| 19 | #include "androidfw/ApkAssets.h" |
| 20 | |
Adam Lesinski | d1ecd7a | 2017-01-23 12:58:11 -0800 | [diff] [blame] | 21 | #include <algorithm> |
| 22 | |
Adam Lesinski | 7ad1110 | 2016-10-28 16:39:15 -0700 | [diff] [blame] | 23 | #include "android-base/logging.h" |
Adam Lesinski | d1ecd7a | 2017-01-23 12:58:11 -0800 | [diff] [blame] | 24 | #include "utils/FileMap.h" |
Adam Lesinski | 7ad1110 | 2016-10-28 16:39:15 -0700 | [diff] [blame] | 25 | #include "utils/Trace.h" |
| 26 | #include "ziparchive/zip_archive.h" |
| 27 | |
| 28 | #include "androidfw/Asset.h" |
| 29 | #include "androidfw/Util.h" |
| 30 | |
| 31 | namespace android { |
| 32 | |
Adam Lesinski | 0c40524 | 2017-01-13 20:47:26 -0800 | [diff] [blame] | 33 | std::unique_ptr<const ApkAssets> ApkAssets::Load(const std::string& path, bool system) { |
| 34 | return ApkAssets::LoadImpl(path, system, false /*load_as_shared_library*/); |
Adam Lesinski | da431a2 | 2016-12-29 16:08:16 -0500 | [diff] [blame] | 35 | } |
| 36 | |
Adam Lesinski | 0c40524 | 2017-01-13 20:47:26 -0800 | [diff] [blame] | 37 | std::unique_ptr<const ApkAssets> ApkAssets::LoadAsSharedLibrary(const std::string& path, |
| 38 | bool system) { |
| 39 | return ApkAssets::LoadImpl(path, system, true /*load_as_shared_library*/); |
Adam Lesinski | da431a2 | 2016-12-29 16:08:16 -0500 | [diff] [blame] | 40 | } |
| 41 | |
Adam Lesinski | 0c40524 | 2017-01-13 20:47:26 -0800 | [diff] [blame] | 42 | std::unique_ptr<const ApkAssets> ApkAssets::LoadImpl(const std::string& path, bool system, |
| 43 | bool load_as_shared_library) { |
Adam Lesinski | da431a2 | 2016-12-29 16:08:16 -0500 | [diff] [blame] | 44 | ATRACE_CALL(); |
Adam Lesinski | 7ad1110 | 2016-10-28 16:39:15 -0700 | [diff] [blame] | 45 | ::ZipArchiveHandle unmanaged_handle; |
| 46 | int32_t result = ::OpenArchive(path.c_str(), &unmanaged_handle); |
| 47 | if (result != 0) { |
| 48 | LOG(ERROR) << ::ErrorCodeString(result); |
| 49 | return {}; |
| 50 | } |
| 51 | |
| 52 | // Wrap the handle in a unique_ptr so it gets automatically closed. |
| 53 | std::unique_ptr<ApkAssets> loaded_apk(new ApkAssets()); |
| 54 | loaded_apk->zip_handle_.reset(unmanaged_handle); |
| 55 | |
| 56 | ::ZipString entry_name("resources.arsc"); |
| 57 | ::ZipEntry entry; |
| 58 | result = ::FindEntry(loaded_apk->zip_handle_.get(), entry_name, &entry); |
| 59 | if (result != 0) { |
| 60 | LOG(ERROR) << ::ErrorCodeString(result); |
| 61 | return {}; |
| 62 | } |
| 63 | |
| 64 | if (entry.method == kCompressDeflated) { |
| 65 | LOG(WARNING) << "resources.arsc is compressed."; |
| 66 | } |
| 67 | |
Adam Lesinski | d1ecd7a | 2017-01-23 12:58:11 -0800 | [diff] [blame] | 68 | loaded_apk->path_ = path; |
Adam Lesinski | 7ad1110 | 2016-10-28 16:39:15 -0700 | [diff] [blame] | 69 | loaded_apk->resources_asset_ = |
| 70 | loaded_apk->Open("resources.arsc", Asset::AccessMode::ACCESS_BUFFER); |
| 71 | if (loaded_apk->resources_asset_ == nullptr) { |
| 72 | return {}; |
| 73 | } |
| 74 | |
Adam Lesinski | 7ad1110 | 2016-10-28 16:39:15 -0700 | [diff] [blame] | 75 | loaded_apk->loaded_arsc_ = |
| 76 | LoadedArsc::Load(loaded_apk->resources_asset_->getBuffer(true /*wordAligned*/), |
Adam Lesinski | 0c40524 | 2017-01-13 20:47:26 -0800 | [diff] [blame] | 77 | loaded_apk->resources_asset_->getLength(), system, load_as_shared_library); |
Adam Lesinski | 7ad1110 | 2016-10-28 16:39:15 -0700 | [diff] [blame] | 78 | if (loaded_apk->loaded_arsc_ == nullptr) { |
| 79 | return {}; |
| 80 | } |
Adam Lesinski | 0c40524 | 2017-01-13 20:47:26 -0800 | [diff] [blame] | 81 | |
| 82 | // Need to force a move for mingw32. |
| 83 | return std::move(loaded_apk); |
Adam Lesinski | 7ad1110 | 2016-10-28 16:39:15 -0700 | [diff] [blame] | 84 | } |
| 85 | |
Adam Lesinski | d1ecd7a | 2017-01-23 12:58:11 -0800 | [diff] [blame] | 86 | std::unique_ptr<Asset> ApkAssets::Open(const std::string& path, Asset::AccessMode mode) const { |
| 87 | ATRACE_CALL(); |
Adam Lesinski | 7ad1110 | 2016-10-28 16:39:15 -0700 | [diff] [blame] | 88 | CHECK(zip_handle_ != nullptr); |
| 89 | |
| 90 | ::ZipString name(path.c_str()); |
| 91 | ::ZipEntry entry; |
| 92 | int32_t result = ::FindEntry(zip_handle_.get(), name, &entry); |
| 93 | if (result != 0) { |
Adam Lesinski | d1ecd7a | 2017-01-23 12:58:11 -0800 | [diff] [blame] | 94 | LOG(ERROR) << "No entry '" << path << "' found in APK '" << path_ << "'"; |
Adam Lesinski | 7ad1110 | 2016-10-28 16:39:15 -0700 | [diff] [blame] | 95 | return {}; |
| 96 | } |
| 97 | |
| 98 | if (entry.method == kCompressDeflated) { |
Adam Lesinski | d1ecd7a | 2017-01-23 12:58:11 -0800 | [diff] [blame] | 99 | std::unique_ptr<FileMap> map = util::make_unique<FileMap>(); |
| 100 | if (!map->create(path_.c_str(), ::GetFileDescriptor(zip_handle_.get()), entry.offset, |
| 101 | entry.compressed_length, true /*readOnly*/)) { |
| 102 | LOG(ERROR) << "Failed to mmap file '" << path << "' in APK '" << path_ << "'"; |
| 103 | return {}; |
| 104 | } |
| 105 | |
| 106 | std::unique_ptr<Asset> asset = |
| 107 | Asset::createFromCompressedMap(std::move(map), entry.uncompressed_length, mode); |
| 108 | if (asset == nullptr) { |
Adam Lesinski | 7ad1110 | 2016-10-28 16:39:15 -0700 | [diff] [blame] | 109 | LOG(ERROR) << "Failed to decompress '" << path << "'."; |
| 110 | return {}; |
| 111 | } |
Adam Lesinski | d1ecd7a | 2017-01-23 12:58:11 -0800 | [diff] [blame] | 112 | return asset; |
Adam Lesinski | 7ad1110 | 2016-10-28 16:39:15 -0700 | [diff] [blame] | 113 | } else { |
Adam Lesinski | d1ecd7a | 2017-01-23 12:58:11 -0800 | [diff] [blame] | 114 | std::unique_ptr<FileMap> map = util::make_unique<FileMap>(); |
| 115 | if (!map->create(path_.c_str(), ::GetFileDescriptor(zip_handle_.get()), entry.offset, |
| 116 | entry.uncompressed_length, true /*readOnly*/)) { |
| 117 | LOG(ERROR) << "Failed to mmap file '" << path << "' in APK '" << path_ << "'"; |
Adam Lesinski | 7ad1110 | 2016-10-28 16:39:15 -0700 | [diff] [blame] | 118 | return {}; |
| 119 | } |
Adam Lesinski | d1ecd7a | 2017-01-23 12:58:11 -0800 | [diff] [blame] | 120 | |
| 121 | std::unique_ptr<Asset> asset = Asset::createFromUncompressedMap(std::move(map), mode); |
| 122 | if (asset == nullptr) { |
| 123 | LOG(ERROR) << "Failed to mmap file '" << path << "' in APK '" << path_ << "'"; |
| 124 | return {}; |
| 125 | } |
| 126 | return asset; |
Adam Lesinski | 7ad1110 | 2016-10-28 16:39:15 -0700 | [diff] [blame] | 127 | } |
Adam Lesinski | d1ecd7a | 2017-01-23 12:58:11 -0800 | [diff] [blame] | 128 | } |
| 129 | |
| 130 | bool ApkAssets::ForEachFile(const std::string& root_path, |
| 131 | const std::function<void(const StringPiece&, FileType)>& f) const { |
| 132 | CHECK(zip_handle_ != nullptr); |
| 133 | |
| 134 | std::string root_path_full = root_path; |
| 135 | if (root_path_full.back() != '/') { |
| 136 | root_path_full += '/'; |
| 137 | } |
| 138 | |
| 139 | ::ZipString prefix(root_path_full.c_str()); |
| 140 | void* cookie; |
| 141 | if (::StartIteration(zip_handle_.get(), &cookie, &prefix, nullptr) != 0) { |
| 142 | return false; |
| 143 | } |
| 144 | |
| 145 | ::ZipString name; |
| 146 | ::ZipEntry entry; |
| 147 | |
| 148 | // We need to hold back directories because many paths will contain them and we want to only |
| 149 | // surface one. |
| 150 | std::set<std::string> dirs; |
| 151 | |
| 152 | int32_t result; |
| 153 | while ((result = ::Next(cookie, &entry, &name)) == 0) { |
| 154 | StringPiece full_file_path(reinterpret_cast<const char*>(name.name), name.name_length); |
| 155 | StringPiece leaf_file_path = full_file_path.substr(root_path_full.size()); |
| 156 | auto iter = std::find(leaf_file_path.begin(), leaf_file_path.end(), '/'); |
| 157 | if (iter != leaf_file_path.end()) { |
| 158 | dirs.insert( |
| 159 | leaf_file_path.substr(0, std::distance(leaf_file_path.begin(), iter)).to_string()); |
| 160 | } else if (!leaf_file_path.empty()) { |
| 161 | f(leaf_file_path, kFileTypeRegular); |
| 162 | } |
| 163 | } |
| 164 | ::EndIteration(cookie); |
| 165 | |
| 166 | // Now present the unique directories. |
| 167 | for (const std::string& dir : dirs) { |
| 168 | f(dir, kFileTypeDirectory); |
| 169 | } |
| 170 | |
| 171 | // -1 is end of iteration, anything else is an error. |
| 172 | return result == -1; |
Adam Lesinski | 7ad1110 | 2016-10-28 16:39:15 -0700 | [diff] [blame] | 173 | } |
| 174 | |
| 175 | } // namespace android |