| /* |
| * Copyright (C) 2007 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #include <stdlib.h> |
| #include <string> |
| #include <vector> |
| |
| #ifdef AB_OTA_UPDATER |
| #include <inttypes.h> |
| #include <map> |
| #include <android-base/parseint.h> |
| #include <android-base/stringprintf.h> |
| #include <android-base/strings.h> |
| #endif |
| #include <cutils/properties.h> |
| |
| #include "common.h" |
| #include "installcommand.h" |
| #include <ziparchive/zip_archive.h> |
| #include "twinstall/install.h" |
| |
| #ifdef AB_OTA_UPDATER |
| |
| static constexpr const char* AB_OTA_PAYLOAD_PROPERTIES = "payload_properties.txt"; |
| static constexpr const char* AB_OTA_PAYLOAD = "payload.bin"; |
| static constexpr const char* METADATA_PATH = "META-INF/com/android/metadata"; |
| |
| // This function parses and returns the build.version.incremental |
| static int parse_build_number(std::string str) { |
| size_t pos = str.find("="); |
| if (pos != std::string::npos) { |
| std::string num_string = android::base::Trim(str.substr(pos+1)); |
| int build_number; |
| if (android::base::ParseInt(num_string.c_str(), &build_number, 0)) { |
| return build_number; |
| } |
| } |
| |
| printf("Failed to parse build number in %s.\n", str.c_str()); |
| return -1; |
| } |
| |
| bool read_metadata_from_package(ZipArchiveHandle zip, std::string* meta_data) { |
| std::string binary_name(METADATA_PATH); |
| ZipEntry binary_entry; |
| if (FindEntry(zip, binary_name, &binary_entry) == 0) { |
| long size = binary_entry.uncompressed_length; |
| if (size <= 0) |
| return false; |
| |
| meta_data->resize(size, '\0'); |
| int32_t ret = ExtractToMemory(zip, &binary_entry, reinterpret_cast<uint8_t*>(&(*meta_data)[0]), |
| size); |
| if (ret != 0) { |
| printf("Failed to read metadata in update package.\n"); |
| CloseArchive(zip); |
| return false; |
| } |
| return true; |
| } |
| return false; |
| } |
| |
| // Read the build.version.incremental of src/tgt from the metadata and log it to last_install. |
| void read_source_target_build(ZipArchiveHandle zip/*, std::vector<std::string>& log_buffer*/) { |
| std::string meta_data; |
| if (!read_metadata_from_package(zip, &meta_data)) { |
| return; |
| } |
| // Examples of the pre-build and post-build strings in metadata: |
| // pre-build-incremental=2943039 |
| // post-build-incremental=2951741 |
| std::vector<std::string> lines = android::base::Split(meta_data, "\n"); |
| for (const std::string& line : lines) { |
| std::string str = android::base::Trim(line); |
| if (android::base::StartsWith(str, "pre-build-incremental")){ |
| int source_build = parse_build_number(str); |
| if (source_build != -1) { |
| printf("source_build: %d\n", source_build); |
| /*log_buffer.push_back(android::base::StringPrintf("source_build: %d", |
| source_build));*/ |
| } |
| } else if (android::base::StartsWith(str, "post-build-incremental")) { |
| int target_build = parse_build_number(str); |
| if (target_build != -1) { |
| printf("target_build: %d\n", target_build); |
| /*log_buffer.push_back(android::base::StringPrintf("target_build: %d", |
| target_build));*/ |
| } |
| } |
| } |
| } |
| |
| // Parses the metadata of the OTA package in |zip| and checks whether we are |
| // allowed to accept this A/B package. Downgrading is not allowed unless |
| // explicitly enabled in the package and only for incremental packages. |
| static int check_newer_ab_build(ZipArchiveHandle zip) |
| { |
| std::string metadata_str; |
| if (!read_metadata_from_package(zip, &metadata_str)) { |
| return INSTALL_CORRUPT; |
| } |
| std::map<std::string, std::string> metadata; |
| for (const std::string& line : android::base::Split(metadata_str, "\n")) { |
| size_t eq = line.find('='); |
| if (eq != std::string::npos) { |
| metadata[line.substr(0, eq)] = line.substr(eq + 1); |
| } |
| } |
| char value[PROPERTY_VALUE_MAX]; |
| char propmodel[PROPERTY_VALUE_MAX]; |
| char propname[PROPERTY_VALUE_MAX]; |
| |
| property_get("ro.product.device", value, ""); |
| property_get("ro.product.model", propmodel, ""); |
| property_get("ro.product.name", propname, ""); |
| const std::string& pkg_device = metadata["pre-device"]; |
| |
| std::vector<std::string> assertResults = android::base::Split(pkg_device, ","); |
| |
| bool deviceExists = false; |
| |
| for(const std::string& deviceAssert : assertResults) |
| { |
| std::string assertName = android::base::Trim(deviceAssert); |
| if ((assertName == value || assertName == propmodel || assertName == propname ) && !assertName.empty()) { |
| deviceExists = true; |
| break; |
| } |
| } |
| |
| if (!deviceExists) { |
| printf("Package is for product %s but expected %s\n", |
| pkg_device.c_str(), value); |
| return INSTALL_ERROR; |
| } |
| |
| // We allow the package to not have any serialno, but if it has a non-empty |
| // value it should match. |
| property_get("ro.serialno", value, ""); |
| const std::string& pkg_serial_no = metadata["serialno"]; |
| if (!pkg_serial_no.empty() && pkg_serial_no != value) { |
| printf("Package is for serial %s\n", pkg_serial_no.c_str()); |
| return INSTALL_ERROR; |
| } |
| |
| if (metadata["ota-type"] != "AB") { |
| printf("Package is not A/B\n"); |
| return INSTALL_ERROR; |
| } |
| |
| // Incremental updates should match the current build. |
| property_get("ro.build.version.incremental", value, ""); |
| const std::string& pkg_pre_build = metadata["pre-build-incremental"]; |
| if (!pkg_pre_build.empty() && pkg_pre_build != value) { |
| printf("Package is for source build %s but expected %s\n", |
| pkg_pre_build.c_str(), value); |
| return INSTALL_ERROR; |
| } |
| property_get("ro.build.fingerprint", value, ""); |
| const std::string& pkg_pre_build_fingerprint = metadata["pre-build"]; |
| if (!pkg_pre_build_fingerprint.empty() && |
| pkg_pre_build_fingerprint != value) { |
| printf("Package is for source build %s but expected %s\n", |
| pkg_pre_build_fingerprint.c_str(), value); |
| return INSTALL_ERROR; |
| } |
| |
| return 0; |
| } |
| |
| int |
| abupdate_binary_command(const char* path, int retry_count __unused, |
| int status_fd, std::vector<std::string>* cmd) |
| { |
| auto package = Package::CreateMemoryPackage(path); |
| if (!package) { |
| return INSTALL_CORRUPT; |
| } |
| |
| ZipArchiveHandle Zip = package->GetZipArchiveHandle(); |
| read_source_target_build(Zip); |
| int ret = check_newer_ab_build(Zip); |
| if (ret) { |
| return ret; |
| } |
| |
| // For A/B updates we extract the payload properties to a buffer and obtain |
| // the RAW payload offset in the zip file. |
| // if (!Zip->EntryExists(AB_OTA_PAYLOAD_PROPERTIES)) { |
| std::string binary_name(AB_OTA_PAYLOAD_PROPERTIES); |
| ZipEntry binary_entry; |
| if (FindEntry(Zip, binary_name, &binary_entry) != 0) { |
| printf("Can't find %s\n", AB_OTA_PAYLOAD_PROPERTIES); |
| return INSTALL_CORRUPT; |
| } |
| std::vector<unsigned char> payload_properties( |
| binary_entry.uncompressed_length); |
| int32_t extract_ret = ExtractToMemory(Zip, &binary_entry, reinterpret_cast<uint8_t*>(payload_properties.data()), |
| binary_entry.uncompressed_length); |
| if (extract_ret != 0) { |
| printf("Can't extract %s\n", AB_OTA_PAYLOAD_PROPERTIES); |
| CloseArchive(Zip); |
| return false; |
| } |
| |
| std::string ab_ota_payload(AB_OTA_PAYLOAD); |
| ZipEntry ab_ota_payload_entry; |
| if (FindEntry(Zip, ab_ota_payload, &ab_ota_payload_entry) != 0) { |
| printf("Can't find %s\n", AB_OTA_PAYLOAD); |
| return INSTALL_CORRUPT; |
| } |
| // long payload_offset = Zip->GetEntryOffset(AB_OTA_PAYLOAD); |
| long payload_offset = ab_ota_payload_entry.offset; |
| *cmd = { |
| "/system/bin/update_engine_sideload", |
| android::base::StringPrintf("--payload=file://%s", path), |
| android::base::StringPrintf("--offset=%ld", payload_offset), |
| "--headers=" + std::string(payload_properties.begin(), |
| payload_properties.end()), |
| android::base::StringPrintf("--status_fd=%d", status_fd), |
| }; |
| return INSTALL_SUCCESS; |
| } |
| |
| #else |
| |
| void read_source_target_build(ZipArchiveHandle zip __unused /*, std::vector<std::string>& log_buffer*/) {return;} |
| |
| int |
| abupdate_binary_command(__unused const char* path, __unused int retry_count, |
| __unused int status_fd, __unused std::vector<std::string>* cmd) |
| { |
| printf("No support for AB OTA zips included\n"); |
| return INSTALL_CORRUPT; |
| } |
| |
| #endif |
| |
| int |
| update_binary_command(const char* path, int retry_count, |
| int status_fd, std::vector<std::string>* cmd) |
| { |
| char charfd[16]; |
| sprintf(charfd, "%i", status_fd); |
| cmd->push_back(TMP_UPDATER_BINARY_PATH); |
| cmd->push_back(EXPAND(RECOVERY_API_VERSION)); |
| cmd->push_back(charfd); |
| cmd->push_back(path); |
| /**cmd = { |
| TMP_UPDATER_BINARY_PATH, |
| EXPAND(RECOVERY_API_VERSION), // defined in Android.mk |
| charfd, |
| path, |
| };*/ |
| if (retry_count > 0) |
| cmd->push_back("retry"); |
| return 0; |
| } |
| |
| // Verifes the compatibility info in a Treble-compatible package. Returns true directly if the |
| // entry doesn't exist. Note that the compatibility info is packed in a zip file inside the OTA |
| // package. |
| bool verify_package_compatibility(ZipArchiveHandle zw) { |
| printf("Verifying package compatibility...\n"); |
| |
| static constexpr const char* COMPATIBILITY_ZIP_ENTRY = "compatibility.zip"; |
| std::string compatibility_entry_name(COMPATIBILITY_ZIP_ENTRY); |
| ZipEntry compatibility_entry; |
| if (FindEntry(zw, compatibility_entry_name, &compatibility_entry) != 0) { |
| printf("Package doesn't contain %s entry\n", COMPATIBILITY_ZIP_ENTRY); |
| return true; |
| } |
| |
| std::string zip_content(compatibility_entry.uncompressed_length, '\0'); |
| int32_t ret; |
| if ((ret = ExtractToMemory(zw, &compatibility_entry, |
| reinterpret_cast<uint8_t*>(&zip_content[0]), |
| compatibility_entry.uncompressed_length)) != 0) { |
| printf("Failed to read %s: %s\n", COMPATIBILITY_ZIP_ENTRY, ErrorCodeString(ret)); |
| return false; |
| } |
| |
| ZipArchiveHandle zip_handle; |
| ret = OpenArchiveFromMemory(static_cast<void*>(const_cast<char*>(zip_content.data())), |
| zip_content.size(), COMPATIBILITY_ZIP_ENTRY, &zip_handle); |
| if (ret != 0) { |
| printf("Failed to OpenArchiveFromMemory: %s\n", ErrorCodeString(ret)); |
| return false; |
| } |
| |
| // Iterate all the entries inside COMPATIBILITY_ZIP_ENTRY and read the contents. |
| void* cookie; |
| ret = StartIteration(zip_handle, &cookie, nullptr, nullptr); |
| if (ret != 0) { |
| printf("Failed to start iterating zip entries: %s\n", ErrorCodeString(ret)); |
| CloseArchive(zip_handle); |
| return false; |
| } |
| std::unique_ptr<void, decltype(&EndIteration)> guard(cookie, EndIteration); |
| |
| std::vector<std::string> compatibility_info; |
| ZipEntry info_entry; |
| std::string info_name; |
| while (Next(cookie, &info_entry, &info_name) == 0) { |
| std::string content(info_entry.uncompressed_length, '\0'); |
| int32_t ret = ExtractToMemory(zip_handle, &info_entry, reinterpret_cast<uint8_t*>(&content[0]), |
| info_entry.uncompressed_length); |
| if (ret != 0) { |
| printf("Failed to read %s: %s\n", info_name.c_str(), ErrorCodeString(ret)); |
| CloseArchive(zip_handle); |
| return false; |
| } |
| compatibility_info.emplace_back(std::move(content)); |
| } |
| CloseArchive(zip_handle); |
| |
| return true; |
| } |