1 // 2 // Copyright (C) 2010 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 #include <errno.h> 18 #include <fcntl.h> 19 #include <sys/stat.h> 20 #include <sys/types.h> 21 #include <unistd.h> 22 23 #include <string> 24 #include <vector> 25 26 #include <base/logging.h> 27 #include <base/strings/string_number_conversions.h> 28 #include <base/strings/string_split.h> 29 #include <brillo/flag_helper.h> 30 #include <brillo/key_value_store.h> 31 32 #include "update_engine/common/prefs.h" 33 #include "update_engine/common/terminator.h" 34 #include "update_engine/common/utils.h" 35 #include "update_engine/payload_consumer/delta_performer.h" 36 #include "update_engine/payload_consumer/payload_constants.h" 37 #include "update_engine/payload_generator/delta_diff_generator.h" 38 #include "update_engine/payload_generator/delta_diff_utils.h" 39 #include "update_engine/payload_generator/payload_generation_config.h" 40 #include "update_engine/payload_generator/payload_signer.h" 41 #include "update_engine/payload_generator/xz.h" 42 #include "update_engine/update_metadata.pb.h" 43 44 // This file contains a simple program that takes an old path, a new path, 45 // and an output file as arguments and the path to an output file and 46 // generates a delta that can be sent to Chrome OS clients. 47 48 using std::string; 49 using std::vector; 50 51 namespace chromeos_update_engine { 52 53 namespace { 54 55 void ParseSignatureSizes(const string& signature_sizes_flag, 56 vector<int>* signature_sizes) { 57 signature_sizes->clear(); 58 vector<string> split_strings = 59 base::SplitString(signature_sizes_flag, ":", base::TRIM_WHITESPACE, 60 base::SPLIT_WANT_ALL); 61 for (const string& str : split_strings) { 62 int size = 0; 63 bool parsing_successful = base::StringToInt(str, &size); 64 LOG_IF(FATAL, !parsing_successful) 65 << "Invalid signature size: " << str; 66 67 LOG_IF(FATAL, size != (2048 / 8)) << 68 "Only signature sizes of 256 bytes are supported."; 69 70 signature_sizes->push_back(size); 71 } 72 } 73 74 bool ParseImageInfo(const string& channel, 75 const string& board, 76 const string& version, 77 const string& key, 78 const string& build_channel, 79 const string& build_version, 80 ImageInfo* image_info) { 81 // All of these arguments should be present or missing. 82 bool empty = channel.empty(); 83 84 CHECK_EQ(channel.empty(), empty); 85 CHECK_EQ(board.empty(), empty); 86 CHECK_EQ(version.empty(), empty); 87 CHECK_EQ(key.empty(), empty); 88 89 if (empty) 90 return false; 91 92 image_info->set_channel(channel); 93 image_info->set_board(board); 94 image_info->set_version(version); 95 image_info->set_key(key); 96 97 image_info->set_build_channel( 98 build_channel.empty() ? channel : build_channel); 99 100 image_info->set_build_version( 101 build_version.empty() ? version : build_version); 102 103 return true; 104 } 105 106 void CalculateHashForSigning(const vector<int> &sizes, 107 const string& out_hash_file, 108 const string& out_metadata_hash_file, 109 const string& in_file) { 110 LOG(INFO) << "Calculating hash for signing."; 111 LOG_IF(FATAL, in_file.empty()) 112 << "Must pass --in_file to calculate hash for signing."; 113 LOG_IF(FATAL, out_hash_file.empty()) 114 << "Must pass --out_hash_file to calculate hash for signing."; 115 116 brillo::Blob payload_hash, metadata_hash; 117 CHECK(PayloadSigner::HashPayloadForSigning(in_file, sizes, &payload_hash, 118 &metadata_hash)); 119 CHECK(utils::WriteFile(out_hash_file.c_str(), payload_hash.data(), 120 payload_hash.size())); 121 if (!out_metadata_hash_file.empty()) 122 CHECK(utils::WriteFile(out_metadata_hash_file.c_str(), metadata_hash.data(), 123 metadata_hash.size())); 124 125 LOG(INFO) << "Done calculating hash for signing."; 126 } 127 128 void SignatureFileFlagToBlobs(const string& signature_file_flag, 129 vector<brillo::Blob>* signatures) { 130 vector<string> signature_files = 131 base::SplitString(signature_file_flag, ":", base::TRIM_WHITESPACE, 132 base::SPLIT_WANT_ALL); 133 for (const string& signature_file : signature_files) { 134 brillo::Blob signature; 135 CHECK(utils::ReadFile(signature_file, &signature)); 136 signatures->push_back(signature); 137 } 138 } 139 140 void SignPayload(const string& in_file, 141 const string& out_file, 142 const string& payload_signature_file, 143 const string& metadata_signature_file, 144 const string& out_metadata_size_file) { 145 LOG(INFO) << "Signing payload."; 146 LOG_IF(FATAL, in_file.empty()) 147 << "Must pass --in_file to sign payload."; 148 LOG_IF(FATAL, out_file.empty()) 149 << "Must pass --out_file to sign payload."; 150 LOG_IF(FATAL, payload_signature_file.empty()) 151 << "Must pass --signature_file to sign payload."; 152 vector<brillo::Blob> signatures, metadata_signatures; 153 SignatureFileFlagToBlobs(payload_signature_file, &signatures); 154 SignatureFileFlagToBlobs(metadata_signature_file, &metadata_signatures); 155 uint64_t final_metadata_size; 156 CHECK(PayloadSigner::AddSignatureToPayload(in_file, signatures, 157 metadata_signatures, out_file, &final_metadata_size)); 158 LOG(INFO) << "Done signing payload. Final metadata size = " 159 << final_metadata_size; 160 if (!out_metadata_size_file.empty()) { 161 string metadata_size_string = std::to_string(final_metadata_size); 162 CHECK(utils::WriteFile(out_metadata_size_file.c_str(), 163 metadata_size_string.data(), 164 metadata_size_string.size())); 165 } 166 } 167 168 void VerifySignedPayload(const string& in_file, 169 const string& public_key) { 170 LOG(INFO) << "Verifying signed payload."; 171 LOG_IF(FATAL, in_file.empty()) 172 << "Must pass --in_file to verify signed payload."; 173 LOG_IF(FATAL, public_key.empty()) 174 << "Must pass --public_key to verify signed payload."; 175 CHECK(PayloadSigner::VerifySignedPayload(in_file, public_key)); 176 LOG(INFO) << "Done verifying signed payload."; 177 } 178 179 // TODO(deymo): This function is likely broken for deltas minor version 2 or 180 // newer. Move this function to a new file and make the delta_performer 181 // integration tests use this instead. 182 void ApplyDelta(const string& in_file, 183 const string& old_kernel, 184 const string& old_rootfs, 185 const string& prefs_dir) { 186 LOG(INFO) << "Applying delta."; 187 LOG_IF(FATAL, old_rootfs.empty()) 188 << "Must pass --old_image to apply delta."; 189 Prefs prefs; 190 InstallPlan install_plan; 191 LOG(INFO) << "Setting up preferences under: " << prefs_dir; 192 LOG_IF(ERROR, !prefs.Init(base::FilePath(prefs_dir))) 193 << "Failed to initialize preferences."; 194 // Get original checksums 195 LOG(INFO) << "Calculating original checksums"; 196 ImageConfig old_image; 197 old_image.partitions.emplace_back(kLegacyPartitionNameRoot); 198 old_image.partitions.back().path = old_rootfs; 199 old_image.partitions.emplace_back(kLegacyPartitionNameKernel); 200 old_image.partitions.back().path = old_kernel; 201 CHECK(old_image.LoadImageSize()); 202 for (const auto& old_part : old_image.partitions) { 203 PartitionInfo part_info; 204 CHECK(diff_utils::InitializePartitionInfo(old_part, &part_info)); 205 InstallPlan::Partition part; 206 part.name = old_part.name; 207 part.source_hash.assign(part_info.hash().begin(), 208 part_info.hash().end()); 209 part.source_path = old_part.path; 210 // Apply the delta in-place to the old_part. 211 part.target_path = old_part.path; 212 install_plan.partitions.push_back(part); 213 } 214 install_plan.payloads.resize(1); 215 DeltaPerformer performer(&prefs, 216 nullptr, 217 nullptr, 218 nullptr, 219 &install_plan, 220 &install_plan.payloads[0]); 221 brillo::Blob buf(1024 * 1024); 222 int fd = open(in_file.c_str(), O_RDONLY, 0); 223 CHECK_GE(fd, 0); 224 ScopedFdCloser fd_closer(&fd); 225 for (off_t offset = 0;; offset += buf.size()) { 226 ssize_t bytes_read; 227 CHECK(utils::PReadAll(fd, buf.data(), buf.size(), offset, &bytes_read)); 228 if (bytes_read == 0) 229 break; 230 CHECK_EQ(performer.Write(buf.data(), bytes_read), bytes_read); 231 } 232 CHECK_EQ(performer.Close(), 0); 233 DeltaPerformer::ResetUpdateProgress(&prefs, false); 234 LOG(INFO) << "Done applying delta."; 235 } 236 237 int ExtractProperties(const string& payload_path, const string& props_file) { 238 brillo::KeyValueStore properties; 239 TEST_AND_RETURN_FALSE( 240 PayloadSigner::ExtractPayloadProperties(payload_path, &properties)); 241 if (props_file == "-") { 242 printf("%s", properties.SaveToString().c_str()); 243 } else { 244 properties.Save(base::FilePath(props_file)); 245 LOG(INFO) << "Generated properties file at " << props_file; 246 } 247 return true; 248 } 249 250 int Main(int argc, char** argv) { 251 DEFINE_string(old_image, "", "Path to the old rootfs"); 252 DEFINE_string(new_image, "", "Path to the new rootfs"); 253 DEFINE_string(old_kernel, "", "Path to the old kernel partition image"); 254 DEFINE_string(new_kernel, "", "Path to the new kernel partition image"); 255 DEFINE_string(old_partitions, "", 256 "Path to the old partitions. To pass multiple partitions, use " 257 "a single argument with a colon between paths, e.g. " 258 "/path/to/part:/path/to/part2::/path/to/last_part . Path can " 259 "be empty, but it has to match the order of partition_names."); 260 DEFINE_string(new_partitions, "", 261 "Path to the new partitions. To pass multiple partitions, use " 262 "a single argument with a colon between paths, e.g. " 263 "/path/to/part:/path/to/part2:/path/to/last_part . Path has " 264 "to match the order of partition_names."); 265 DEFINE_string(old_mapfiles, 266 "", 267 "Path to the .map files associated with the partition files " 268 "in the old partition. The .map file is normally generated " 269 "when creating the image in Android builds. Only recommended " 270 "for unsupported filesystem. Pass multiple files separated by " 271 "a colon as with -old_partitions."); 272 DEFINE_string(new_mapfiles, 273 "", 274 "Path to the .map files associated with the partition files " 275 "in the new partition, similar to the -old_mapfiles flag."); 276 DEFINE_string(partition_names, 277 string(kLegacyPartitionNameRoot) + ":" + 278 kLegacyPartitionNameKernel, 279 "Names of the partitions. To pass multiple names, use a single " 280 "argument with a colon between names, e.g. " 281 "name:name2:name3:last_name . Name can not be empty, and it " 282 "has to match the order of partitions."); 283 DEFINE_string(in_file, "", 284 "Path to input delta payload file used to hash/sign payloads " 285 "and apply delta over old_image (for debugging)"); 286 DEFINE_string(out_file, "", "Path to output delta payload file"); 287 DEFINE_string(out_hash_file, "", "Path to output hash file"); 288 DEFINE_string(out_metadata_hash_file, "", 289 "Path to output metadata hash file"); 290 DEFINE_string(out_metadata_size_file, "", 291 "Path to output metadata size file"); 292 DEFINE_string(private_key, "", "Path to private key in .pem format"); 293 DEFINE_string(public_key, "", "Path to public key in .pem format"); 294 DEFINE_int32(public_key_version, -1, 295 "DEPRECATED. Key-check version # of client"); 296 DEFINE_string(prefs_dir, "/tmp/update_engine_prefs", 297 "Preferences directory, used with apply_delta"); 298 DEFINE_string(signature_size, "", 299 "Raw signature size used for hash calculation. " 300 "You may pass in multiple sizes by colon separating them. E.g. " 301 "2048:2048:4096 will assume 3 signatures, the first two with " 302 "2048 size and the last 4096."); 303 DEFINE_string(signature_file, "", 304 "Raw signature file to sign payload with. To pass multiple " 305 "signatures, use a single argument with a colon between paths, " 306 "e.g. /path/to/sig:/path/to/next:/path/to/last_sig . Each " 307 "signature will be assigned a client version, starting from " 308 "kSignatureOriginalVersion."); 309 DEFINE_string(metadata_signature_file, "", 310 "Raw signature file with the signature of the metadata hash. " 311 "To pass multiple signatures, use a single argument with a " 312 "colon between paths, " 313 "e.g. /path/to/sig:/path/to/next:/path/to/last_sig ."); 314 DEFINE_int32(chunk_size, 200 * 1024 * 1024, 315 "Payload chunk size (-1 for whole files)"); 316 DEFINE_uint64(rootfs_partition_size, 317 chromeos_update_engine::kRootFSPartitionSize, 318 "RootFS partition size for the image once installed"); 319 DEFINE_uint64(major_version, 1, 320 "The major version of the payload being generated."); 321 DEFINE_int32(minor_version, -1, 322 "The minor version of the payload being generated " 323 "(-1 means autodetect)."); 324 DEFINE_string(properties_file, "", 325 "If passed, dumps the payload properties of the payload passed " 326 "in --in_file and exits."); 327 DEFINE_string(zlib_fingerprint, "", 328 "The fingerprint of zlib in the source image in hash string " 329 "format, used to check imgdiff compatibility."); 330 331 DEFINE_string(old_channel, "", 332 "The channel for the old image. 'dev-channel', 'npo-channel', " 333 "etc. Ignored, except during delta generation."); 334 DEFINE_string(old_board, "", 335 "The board for the old image. 'x86-mario', 'lumpy', " 336 "etc. Ignored, except during delta generation."); 337 DEFINE_string(old_version, "", 338 "The build version of the old image. 1.2.3, etc."); 339 DEFINE_string(old_key, "", 340 "The key used to sign the old image. 'premp', 'mp', 'mp-v3'," 341 " etc"); 342 DEFINE_string(old_build_channel, "", 343 "The channel for the build of the old image. 'dev-channel', " 344 "etc, but will never contain special channels such as " 345 "'npo-channel'. Ignored, except during delta generation."); 346 DEFINE_string(old_build_version, "", 347 "The version of the build containing the old image."); 348 349 DEFINE_string(new_channel, "", 350 "The channel for the new image. 'dev-channel', 'npo-channel', " 351 "etc. Ignored, except during delta generation."); 352 DEFINE_string(new_board, "", 353 "The board for the new image. 'x86-mario', 'lumpy', " 354 "etc. Ignored, except during delta generation."); 355 DEFINE_string(new_version, "", 356 "The build version of the new image. 1.2.3, etc."); 357 DEFINE_string(new_key, "", 358 "The key used to sign the new image. 'premp', 'mp', 'mp-v3'," 359 " etc"); 360 DEFINE_string(new_build_channel, "", 361 "The channel for the build of the new image. 'dev-channel', " 362 "etc, but will never contain special channels such as " 363 "'npo-channel'. Ignored, except during delta generation."); 364 DEFINE_string(new_build_version, "", 365 "The version of the build containing the new image."); 366 DEFINE_string(new_postinstall_config_file, "", 367 "A config file specifying postinstall related metadata. " 368 "Only allowed in major version 2 or newer."); 369 370 brillo::FlagHelper::Init(argc, argv, 371 "Generates a payload to provide to ChromeOS' update_engine.\n\n" 372 "This tool can create full payloads and also delta payloads if the src\n" 373 "image is provided. It also provides debugging options to apply, sign\n" 374 "and verify payloads."); 375 Terminator::Init(); 376 377 logging::LoggingSettings log_settings; 378 log_settings.log_file = "delta_generator.log"; 379 log_settings.logging_dest = logging::LOG_TO_SYSTEM_DEBUG_LOG; 380 log_settings.lock_log = logging::LOCK_LOG_FILE; 381 log_settings.delete_old = logging::APPEND_TO_OLD_LOG_FILE; 382 383 logging::InitLogging(log_settings); 384 385 // Initialize the Xz compressor. 386 XzCompressInit(); 387 388 vector<int> signature_sizes; 389 ParseSignatureSizes(FLAGS_signature_size, &signature_sizes); 390 391 if (!FLAGS_out_hash_file.empty() || !FLAGS_out_metadata_hash_file.empty()) { 392 CHECK(FLAGS_out_metadata_size_file.empty()); 393 CalculateHashForSigning(signature_sizes, FLAGS_out_hash_file, 394 FLAGS_out_metadata_hash_file, FLAGS_in_file); 395 return 0; 396 } 397 if (!FLAGS_signature_file.empty()) { 398 SignPayload(FLAGS_in_file, FLAGS_out_file, FLAGS_signature_file, 399 FLAGS_metadata_signature_file, FLAGS_out_metadata_size_file); 400 return 0; 401 } 402 if (!FLAGS_public_key.empty()) { 403 LOG_IF(WARNING, FLAGS_public_key_version != -1) 404 << "--public_key_version is deprecated and ignored."; 405 VerifySignedPayload(FLAGS_in_file, FLAGS_public_key); 406 return 0; 407 } 408 if (!FLAGS_properties_file.empty()) { 409 return ExtractProperties(FLAGS_in_file, FLAGS_properties_file) ? 0 : 1; 410 } 411 if (!FLAGS_in_file.empty()) { 412 ApplyDelta(FLAGS_in_file, FLAGS_old_kernel, FLAGS_old_image, 413 FLAGS_prefs_dir); 414 return 0; 415 } 416 417 // A payload generation was requested. Convert the flags to a 418 // PayloadGenerationConfig. 419 PayloadGenerationConfig payload_config; 420 vector<string> partition_names, old_partitions, new_partitions; 421 vector<string> old_mapfiles, new_mapfiles; 422 423 if (!FLAGS_old_mapfiles.empty()) { 424 old_mapfiles = base::SplitString( 425 FLAGS_old_mapfiles, ":", base::TRIM_WHITESPACE, base::SPLIT_WANT_ALL); 426 } 427 if (!FLAGS_new_mapfiles.empty()) { 428 new_mapfiles = base::SplitString( 429 FLAGS_new_mapfiles, ":", base::TRIM_WHITESPACE, base::SPLIT_WANT_ALL); 430 } 431 432 partition_names = 433 base::SplitString(FLAGS_partition_names, ":", base::TRIM_WHITESPACE, 434 base::SPLIT_WANT_ALL); 435 CHECK(!partition_names.empty()); 436 if (FLAGS_major_version == kChromeOSMajorPayloadVersion || 437 FLAGS_new_partitions.empty()) { 438 LOG_IF(FATAL, partition_names.size() != 2) 439 << "To support more than 2 partitions, please use the " 440 << "--new_partitions flag and major version 2."; 441 LOG_IF(FATAL, partition_names[0] != kLegacyPartitionNameRoot || 442 partition_names[1] != kLegacyPartitionNameKernel) 443 << "To support non-default partition name, please use the " 444 << "--new_partitions flag and major version 2."; 445 } 446 447 if (!FLAGS_new_partitions.empty()) { 448 LOG_IF(FATAL, !FLAGS_new_image.empty() || !FLAGS_new_kernel.empty()) 449 << "--new_image and --new_kernel are deprecated, please use " 450 << "--new_partitions for all partitions."; 451 new_partitions = 452 base::SplitString(FLAGS_new_partitions, ":", base::TRIM_WHITESPACE, 453 base::SPLIT_WANT_ALL); 454 CHECK(partition_names.size() == new_partitions.size()); 455 456 payload_config.is_delta = !FLAGS_old_partitions.empty(); 457 LOG_IF(FATAL, !FLAGS_old_image.empty() || !FLAGS_old_kernel.empty()) 458 << "--old_image and --old_kernel are deprecated, please use " 459 << "--old_partitions if you are using --new_partitions."; 460 } else { 461 new_partitions = {FLAGS_new_image, FLAGS_new_kernel}; 462 LOG(WARNING) << "--new_partitions is empty, using deprecated --new_image " 463 << "and --new_kernel flags."; 464 465 payload_config.is_delta = !FLAGS_old_image.empty() || 466 !FLAGS_old_kernel.empty(); 467 LOG_IF(FATAL, !FLAGS_old_partitions.empty()) 468 << "Please use --new_partitions if you are using --old_partitions."; 469 } 470 for (size_t i = 0; i < partition_names.size(); i++) { 471 LOG_IF(FATAL, partition_names[i].empty()) 472 << "Partition name can't be empty, see --partition_names."; 473 payload_config.target.partitions.emplace_back(partition_names[i]); 474 payload_config.target.partitions.back().path = new_partitions[i]; 475 if (i < new_mapfiles.size()) 476 payload_config.target.partitions.back().mapfile_path = new_mapfiles[i]; 477 } 478 479 if (payload_config.is_delta) { 480 if (!FLAGS_old_partitions.empty()) { 481 old_partitions = 482 base::SplitString(FLAGS_old_partitions, ":", base::TRIM_WHITESPACE, 483 base::SPLIT_WANT_ALL); 484 CHECK(old_partitions.size() == new_partitions.size()); 485 } else { 486 old_partitions = {FLAGS_old_image, FLAGS_old_kernel}; 487 LOG(WARNING) << "--old_partitions is empty, using deprecated --old_image " 488 << "and --old_kernel flags."; 489 } 490 for (size_t i = 0; i < partition_names.size(); i++) { 491 payload_config.source.partitions.emplace_back(partition_names[i]); 492 payload_config.source.partitions.back().path = old_partitions[i]; 493 if (i < old_mapfiles.size()) 494 payload_config.source.partitions.back().mapfile_path = old_mapfiles[i]; 495 } 496 } 497 498 if (!FLAGS_new_postinstall_config_file.empty()) { 499 LOG_IF(FATAL, FLAGS_major_version == kChromeOSMajorPayloadVersion) 500 << "Postinstall config is only allowed in major version 2 or newer."; 501 brillo::KeyValueStore store; 502 CHECK(store.Load(base::FilePath(FLAGS_new_postinstall_config_file))); 503 CHECK(payload_config.target.LoadPostInstallConfig(store)); 504 } 505 506 // Use the default soft_chunk_size defined in the config. 507 payload_config.hard_chunk_size = FLAGS_chunk_size; 508 payload_config.block_size = kBlockSize; 509 510 // The partition size is never passed to the delta_generator, so we 511 // need to detect those from the provided files. 512 if (payload_config.is_delta) { 513 CHECK(payload_config.source.LoadImageSize()); 514 } 515 CHECK(payload_config.target.LoadImageSize()); 516 517 CHECK(!FLAGS_out_file.empty()); 518 519 // Ignore failures. These are optional arguments. 520 ParseImageInfo(FLAGS_new_channel, 521 FLAGS_new_board, 522 FLAGS_new_version, 523 FLAGS_new_key, 524 FLAGS_new_build_channel, 525 FLAGS_new_build_version, 526 &payload_config.target.image_info); 527 528 // Ignore failures. These are optional arguments. 529 ParseImageInfo(FLAGS_old_channel, 530 FLAGS_old_board, 531 FLAGS_old_version, 532 FLAGS_old_key, 533 FLAGS_old_build_channel, 534 FLAGS_old_build_version, 535 &payload_config.source.image_info); 536 537 payload_config.rootfs_partition_size = FLAGS_rootfs_partition_size; 538 539 if (payload_config.is_delta) { 540 // Avoid opening the filesystem interface for full payloads. 541 for (PartitionConfig& part : payload_config.target.partitions) 542 CHECK(part.OpenFilesystem()); 543 for (PartitionConfig& part : payload_config.source.partitions) 544 CHECK(part.OpenFilesystem()); 545 } 546 547 payload_config.version.major = FLAGS_major_version; 548 LOG(INFO) << "Using provided major_version=" << FLAGS_major_version; 549 550 if (FLAGS_minor_version == -1) { 551 // Autodetect minor_version by looking at the update_engine.conf in the old 552 // image. 553 if (payload_config.is_delta) { 554 payload_config.version.minor = kInPlaceMinorPayloadVersion; 555 brillo::KeyValueStore store; 556 uint32_t minor_version; 557 for (const PartitionConfig& part : payload_config.source.partitions) { 558 if (part.fs_interface && part.fs_interface->LoadSettings(&store) && 559 utils::GetMinorVersion(store, &minor_version)) { 560 payload_config.version.minor = minor_version; 561 break; 562 } 563 } 564 } else { 565 payload_config.version.minor = kFullPayloadMinorVersion; 566 } 567 LOG(INFO) << "Auto-detected minor_version=" << payload_config.version.minor; 568 } else { 569 payload_config.version.minor = FLAGS_minor_version; 570 LOG(INFO) << "Using provided minor_version=" << FLAGS_minor_version; 571 } 572 573 if (!FLAGS_zlib_fingerprint.empty()) { 574 if (utils::IsZlibCompatible(FLAGS_zlib_fingerprint)) { 575 payload_config.version.imgdiff_allowed = true; 576 } else { 577 LOG(INFO) << "IMGDIFF operation disabled due to fingerprint mismatch."; 578 } 579 } 580 581 if (payload_config.is_delta) { 582 LOG(INFO) << "Generating delta update"; 583 } else { 584 LOG(INFO) << "Generating full update"; 585 } 586 587 // From this point, all the options have been parsed. 588 if (!payload_config.Validate()) { 589 LOG(ERROR) << "Invalid options passed. See errors above."; 590 return 1; 591 } 592 593 uint64_t metadata_size; 594 if (!GenerateUpdatePayloadFile(payload_config, 595 FLAGS_out_file, 596 FLAGS_private_key, 597 &metadata_size)) { 598 return 1; 599 } 600 if (!FLAGS_out_metadata_size_file.empty()) { 601 string metadata_size_string = std::to_string(metadata_size); 602 CHECK(utils::WriteFile(FLAGS_out_metadata_size_file.c_str(), 603 metadata_size_string.data(), 604 metadata_size_string.size())); 605 } 606 return 0; 607 } 608 609 } // namespace 610 611 } // namespace chromeos_update_engine 612 613 int main(int argc, char** argv) { 614 return chromeos_update_engine::Main(argc, argv); 615 } 616
