Christopher Ferris | e6884ce | 2015-11-10 14:55:12 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2015 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 | |
Mark Salyzyn | ff2dcd9 | 2016-09-28 15:54:45 -0700 | [diff] [blame] | 17 | #define LOG_TAG "ZIPARCHIVE" |
| 18 | |
Christopher Ferris | e6884ce | 2015-11-10 14:55:12 -0800 | [diff] [blame] | 19 | // Read-only stream access to Zip Archive entries. |
| 20 | #include <errno.h> |
| 21 | #include <inttypes.h> |
| 22 | #include <string.h> |
| 23 | #include <sys/types.h> |
| 24 | #include <unistd.h> |
| 25 | |
| 26 | #include <memory> |
| 27 | #include <vector> |
| 28 | |
Christopher Ferris | e6884ce | 2015-11-10 14:55:12 -0800 | [diff] [blame] | 29 | #include <android-base/file.h> |
Mark Salyzyn | 30f991f | 2017-01-10 13:19:54 -0800 | [diff] [blame] | 30 | #include <log/log.h> |
| 31 | |
Christopher Ferris | e6884ce | 2015-11-10 14:55:12 -0800 | [diff] [blame] | 32 | #include <ziparchive/zip_archive.h> |
| 33 | #include <ziparchive/zip_archive_stream_entry.h> |
| 34 | #include <zlib.h> |
| 35 | |
| 36 | #include "zip_archive_private.h" |
| 37 | |
| 38 | static constexpr size_t kBufSize = 65535; |
| 39 | |
| 40 | bool ZipArchiveStreamEntry::Init(const ZipEntry& entry) { |
Christopher Ferris | e6884ce | 2015-11-10 14:55:12 -0800 | [diff] [blame] | 41 | crc32_ = entry.crc32; |
Adam Lesinski | de117e4 | 2017-06-19 10:27:38 -0700 | [diff] [blame] | 42 | offset_ = entry.offset; |
Christopher Ferris | e6884ce | 2015-11-10 14:55:12 -0800 | [diff] [blame] | 43 | return true; |
| 44 | } |
| 45 | |
| 46 | class ZipArchiveStreamEntryUncompressed : public ZipArchiveStreamEntry { |
| 47 | public: |
Chih-Hung Hsieh | 3a114e0 | 2016-04-25 14:38:37 -0700 | [diff] [blame] | 48 | explicit ZipArchiveStreamEntryUncompressed(ZipArchiveHandle handle) |
| 49 | : ZipArchiveStreamEntry(handle) {} |
Christopher Ferris | e6884ce | 2015-11-10 14:55:12 -0800 | [diff] [blame] | 50 | virtual ~ZipArchiveStreamEntryUncompressed() {} |
| 51 | |
| 52 | const std::vector<uint8_t>* Read() override; |
| 53 | |
| 54 | bool Verify() override; |
| 55 | |
| 56 | protected: |
| 57 | bool Init(const ZipEntry& entry) override; |
| 58 | |
Adam Lesinski | de117e4 | 2017-06-19 10:27:38 -0700 | [diff] [blame] | 59 | uint32_t length_ = 0u; |
Christopher Ferris | e6884ce | 2015-11-10 14:55:12 -0800 | [diff] [blame] | 60 | |
| 61 | private: |
| 62 | std::vector<uint8_t> data_; |
Adam Lesinski | de117e4 | 2017-06-19 10:27:38 -0700 | [diff] [blame] | 63 | uint32_t computed_crc32_ = 0u; |
Christopher Ferris | e6884ce | 2015-11-10 14:55:12 -0800 | [diff] [blame] | 64 | }; |
| 65 | |
| 66 | bool ZipArchiveStreamEntryUncompressed::Init(const ZipEntry& entry) { |
| 67 | if (!ZipArchiveStreamEntry::Init(entry)) { |
| 68 | return false; |
| 69 | } |
| 70 | |
| 71 | length_ = entry.uncompressed_length; |
| 72 | |
| 73 | data_.resize(kBufSize); |
| 74 | computed_crc32_ = 0; |
| 75 | |
| 76 | return true; |
| 77 | } |
| 78 | |
| 79 | const std::vector<uint8_t>* ZipArchiveStreamEntryUncompressed::Read() { |
| 80 | if (length_ == 0) { |
| 81 | return nullptr; |
| 82 | } |
| 83 | |
| 84 | size_t bytes = (length_ > data_.size()) ? data_.size() : length_; |
| 85 | ZipArchive* archive = reinterpret_cast<ZipArchive*>(handle_); |
| 86 | errno = 0; |
Adam Lesinski | de117e4 | 2017-06-19 10:27:38 -0700 | [diff] [blame] | 87 | if (!archive->mapped_zip.ReadAtOffset(data_.data(), bytes, offset_)) { |
Christopher Ferris | e6884ce | 2015-11-10 14:55:12 -0800 | [diff] [blame] | 88 | if (errno != 0) { |
| 89 | ALOGE("Error reading from archive fd: %s", strerror(errno)); |
| 90 | } else { |
| 91 | ALOGE("Short read of zip file, possibly corrupted zip?"); |
| 92 | } |
| 93 | length_ = 0; |
| 94 | return nullptr; |
| 95 | } |
| 96 | |
| 97 | if (bytes < data_.size()) { |
| 98 | data_.resize(bytes); |
| 99 | } |
| 100 | computed_crc32_ = crc32(computed_crc32_, data_.data(), data_.size()); |
| 101 | length_ -= bytes; |
Adam Lesinski | de117e4 | 2017-06-19 10:27:38 -0700 | [diff] [blame] | 102 | offset_ += bytes; |
Christopher Ferris | e6884ce | 2015-11-10 14:55:12 -0800 | [diff] [blame] | 103 | return &data_; |
| 104 | } |
| 105 | |
| 106 | bool ZipArchiveStreamEntryUncompressed::Verify() { |
| 107 | return length_ == 0 && crc32_ == computed_crc32_; |
| 108 | } |
| 109 | |
| 110 | class ZipArchiveStreamEntryCompressed : public ZipArchiveStreamEntry { |
| 111 | public: |
Chih-Hung Hsieh | 3a114e0 | 2016-04-25 14:38:37 -0700 | [diff] [blame] | 112 | explicit ZipArchiveStreamEntryCompressed(ZipArchiveHandle handle) |
| 113 | : ZipArchiveStreamEntry(handle) {} |
Christopher Ferris | e6884ce | 2015-11-10 14:55:12 -0800 | [diff] [blame] | 114 | virtual ~ZipArchiveStreamEntryCompressed(); |
| 115 | |
| 116 | const std::vector<uint8_t>* Read() override; |
| 117 | |
| 118 | bool Verify() override; |
| 119 | |
| 120 | protected: |
| 121 | bool Init(const ZipEntry& entry) override; |
| 122 | |
| 123 | private: |
| 124 | bool z_stream_init_ = false; |
| 125 | z_stream z_stream_; |
| 126 | std::vector<uint8_t> in_; |
| 127 | std::vector<uint8_t> out_; |
Adam Lesinski | de117e4 | 2017-06-19 10:27:38 -0700 | [diff] [blame] | 128 | uint32_t uncompressed_length_ = 0u; |
| 129 | uint32_t compressed_length_ = 0u; |
| 130 | uint32_t computed_crc32_ = 0u; |
Christopher Ferris | e6884ce | 2015-11-10 14:55:12 -0800 | [diff] [blame] | 131 | }; |
| 132 | |
| 133 | // This method is using libz macros with old-style-casts |
| 134 | #pragma GCC diagnostic push |
| 135 | #pragma GCC diagnostic ignored "-Wold-style-cast" |
| 136 | static inline int zlib_inflateInit2(z_stream* stream, int window_bits) { |
| 137 | return inflateInit2(stream, window_bits); |
| 138 | } |
| 139 | #pragma GCC diagnostic pop |
| 140 | |
| 141 | bool ZipArchiveStreamEntryCompressed::Init(const ZipEntry& entry) { |
| 142 | if (!ZipArchiveStreamEntry::Init(entry)) { |
| 143 | return false; |
| 144 | } |
| 145 | |
| 146 | // Initialize the zlib stream struct. |
| 147 | memset(&z_stream_, 0, sizeof(z_stream_)); |
| 148 | z_stream_.zalloc = Z_NULL; |
| 149 | z_stream_.zfree = Z_NULL; |
| 150 | z_stream_.opaque = Z_NULL; |
| 151 | z_stream_.next_in = nullptr; |
| 152 | z_stream_.avail_in = 0; |
| 153 | z_stream_.avail_out = 0; |
| 154 | z_stream_.data_type = Z_UNKNOWN; |
| 155 | |
| 156 | // Use the undocumented "negative window bits" feature to tell zlib |
| 157 | // that there's no zlib header waiting for it. |
| 158 | int zerr = zlib_inflateInit2(&z_stream_, -MAX_WBITS); |
| 159 | if (zerr != Z_OK) { |
| 160 | if (zerr == Z_VERSION_ERROR) { |
Jiyong Park | cd997e6 | 2017-06-30 17:23:33 +0900 | [diff] [blame] | 161 | ALOGE("Installed zlib is not compatible with linked version (%s)", ZLIB_VERSION); |
Christopher Ferris | e6884ce | 2015-11-10 14:55:12 -0800 | [diff] [blame] | 162 | } else { |
| 163 | ALOGE("Call to inflateInit2 failed (zerr=%d)", zerr); |
| 164 | } |
| 165 | |
| 166 | return false; |
| 167 | } |
| 168 | |
| 169 | z_stream_init_ = true; |
| 170 | |
| 171 | uncompressed_length_ = entry.uncompressed_length; |
| 172 | compressed_length_ = entry.compressed_length; |
| 173 | |
| 174 | out_.resize(kBufSize); |
| 175 | in_.resize(kBufSize); |
| 176 | |
| 177 | computed_crc32_ = 0; |
| 178 | |
| 179 | return true; |
| 180 | } |
| 181 | |
| 182 | ZipArchiveStreamEntryCompressed::~ZipArchiveStreamEntryCompressed() { |
| 183 | if (z_stream_init_) { |
| 184 | inflateEnd(&z_stream_); |
| 185 | z_stream_init_ = false; |
| 186 | } |
| 187 | } |
| 188 | |
| 189 | bool ZipArchiveStreamEntryCompressed::Verify() { |
| 190 | return z_stream_init_ && uncompressed_length_ == 0 && compressed_length_ == 0 && |
Jiyong Park | cd997e6 | 2017-06-30 17:23:33 +0900 | [diff] [blame] | 191 | crc32_ == computed_crc32_; |
Christopher Ferris | e6884ce | 2015-11-10 14:55:12 -0800 | [diff] [blame] | 192 | } |
| 193 | |
| 194 | const std::vector<uint8_t>* ZipArchiveStreamEntryCompressed::Read() { |
| 195 | if (z_stream_.avail_out == 0) { |
| 196 | z_stream_.next_out = out_.data(); |
Jiyong Park | cd997e6 | 2017-06-30 17:23:33 +0900 | [diff] [blame] | 197 | z_stream_.avail_out = out_.size(); |
| 198 | ; |
Christopher Ferris | e6884ce | 2015-11-10 14:55:12 -0800 | [diff] [blame] | 199 | } |
| 200 | |
| 201 | while (true) { |
| 202 | if (z_stream_.avail_in == 0) { |
| 203 | if (compressed_length_ == 0) { |
| 204 | return nullptr; |
| 205 | } |
| 206 | size_t bytes = (compressed_length_ > in_.size()) ? in_.size() : compressed_length_; |
| 207 | ZipArchive* archive = reinterpret_cast<ZipArchive*>(handle_); |
| 208 | errno = 0; |
Adam Lesinski | de117e4 | 2017-06-19 10:27:38 -0700 | [diff] [blame] | 209 | if (!archive->mapped_zip.ReadAtOffset(in_.data(), bytes, offset_)) { |
Christopher Ferris | e6884ce | 2015-11-10 14:55:12 -0800 | [diff] [blame] | 210 | if (errno != 0) { |
| 211 | ALOGE("Error reading from archive fd: %s", strerror(errno)); |
| 212 | } else { |
| 213 | ALOGE("Short read of zip file, possibly corrupted zip?"); |
| 214 | } |
| 215 | return nullptr; |
| 216 | } |
| 217 | |
| 218 | compressed_length_ -= bytes; |
Adam Lesinski | de117e4 | 2017-06-19 10:27:38 -0700 | [diff] [blame] | 219 | offset_ += bytes; |
Christopher Ferris | e6884ce | 2015-11-10 14:55:12 -0800 | [diff] [blame] | 220 | z_stream_.next_in = in_.data(); |
| 221 | z_stream_.avail_in = bytes; |
| 222 | } |
| 223 | |
| 224 | int zerr = inflate(&z_stream_, Z_NO_FLUSH); |
| 225 | if (zerr != Z_OK && zerr != Z_STREAM_END) { |
Jiyong Park | cd997e6 | 2017-06-30 17:23:33 +0900 | [diff] [blame] | 226 | ALOGE("inflate zerr=%d (nIn=%p aIn=%u nOut=%p aOut=%u)", zerr, z_stream_.next_in, |
| 227 | z_stream_.avail_in, z_stream_.next_out, z_stream_.avail_out); |
Christopher Ferris | e6884ce | 2015-11-10 14:55:12 -0800 | [diff] [blame] | 228 | return nullptr; |
| 229 | } |
| 230 | |
| 231 | if (z_stream_.avail_out == 0) { |
| 232 | uncompressed_length_ -= out_.size(); |
| 233 | computed_crc32_ = crc32(computed_crc32_, out_.data(), out_.size()); |
| 234 | return &out_; |
| 235 | } |
| 236 | if (zerr == Z_STREAM_END) { |
| 237 | if (z_stream_.avail_out != 0) { |
| 238 | // Resize the vector down to the actual size of the data. |
| 239 | out_.resize(out_.size() - z_stream_.avail_out); |
| 240 | computed_crc32_ = crc32(computed_crc32_, out_.data(), out_.size()); |
| 241 | uncompressed_length_ -= out_.size(); |
| 242 | return &out_; |
| 243 | } |
| 244 | return nullptr; |
| 245 | } |
| 246 | } |
| 247 | return nullptr; |
| 248 | } |
| 249 | |
| 250 | class ZipArchiveStreamEntryRawCompressed : public ZipArchiveStreamEntryUncompressed { |
| 251 | public: |
Chih-Hung Hsieh | 3a114e0 | 2016-04-25 14:38:37 -0700 | [diff] [blame] | 252 | explicit ZipArchiveStreamEntryRawCompressed(ZipArchiveHandle handle) |
Christopher Ferris | e6884ce | 2015-11-10 14:55:12 -0800 | [diff] [blame] | 253 | : ZipArchiveStreamEntryUncompressed(handle) {} |
| 254 | virtual ~ZipArchiveStreamEntryRawCompressed() {} |
| 255 | |
| 256 | bool Verify() override; |
| 257 | |
| 258 | protected: |
| 259 | bool Init(const ZipEntry& entry) override; |
| 260 | }; |
| 261 | |
| 262 | bool ZipArchiveStreamEntryRawCompressed::Init(const ZipEntry& entry) { |
| 263 | if (!ZipArchiveStreamEntryUncompressed::Init(entry)) { |
| 264 | return false; |
| 265 | } |
| 266 | length_ = entry.compressed_length; |
| 267 | |
| 268 | return true; |
| 269 | } |
| 270 | |
| 271 | bool ZipArchiveStreamEntryRawCompressed::Verify() { |
| 272 | return length_ == 0; |
| 273 | } |
| 274 | |
Jiyong Park | cd997e6 | 2017-06-30 17:23:33 +0900 | [diff] [blame] | 275 | ZipArchiveStreamEntry* ZipArchiveStreamEntry::Create(ZipArchiveHandle handle, |
| 276 | const ZipEntry& entry) { |
Christopher Ferris | e6884ce | 2015-11-10 14:55:12 -0800 | [diff] [blame] | 277 | ZipArchiveStreamEntry* stream = nullptr; |
| 278 | if (entry.method != kCompressStored) { |
| 279 | stream = new ZipArchiveStreamEntryCompressed(handle); |
| 280 | } else { |
| 281 | stream = new ZipArchiveStreamEntryUncompressed(handle); |
| 282 | } |
| 283 | if (stream && !stream->Init(entry)) { |
| 284 | delete stream; |
| 285 | stream = nullptr; |
| 286 | } |
| 287 | |
| 288 | return stream; |
| 289 | } |
| 290 | |
Jiyong Park | cd997e6 | 2017-06-30 17:23:33 +0900 | [diff] [blame] | 291 | ZipArchiveStreamEntry* ZipArchiveStreamEntry::CreateRaw(ZipArchiveHandle handle, |
| 292 | const ZipEntry& entry) { |
Christopher Ferris | e6884ce | 2015-11-10 14:55:12 -0800 | [diff] [blame] | 293 | ZipArchiveStreamEntry* stream = nullptr; |
| 294 | if (entry.method == kCompressStored) { |
| 295 | // Not compressed, don't need to do anything special. |
| 296 | stream = new ZipArchiveStreamEntryUncompressed(handle); |
| 297 | } else { |
| 298 | stream = new ZipArchiveStreamEntryRawCompressed(handle); |
| 299 | } |
| 300 | if (stream && !stream->Init(entry)) { |
| 301 | delete stream; |
| 302 | stream = nullptr; |
| 303 | } |
| 304 | return stream; |
| 305 | } |