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Diffstat (limited to '')
| -rw-r--r-- | installcommand.cpp | 335 |
1 files changed, 335 insertions, 0 deletions
diff --git a/installcommand.cpp b/installcommand.cpp new file mode 100644 index 000000000..f9978f27b --- /dev/null +++ b/installcommand.cpp @@ -0,0 +1,335 @@ +/* + * 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 "zipwrap.hpp" +#ifndef USE_MINZIP +#include <ziparchive/zip_archive.h> +#include <vintf/VintfObjectRecovery.h> +#endif +#ifdef USE_OLD_VERIFIER +#include "verifier24/verifier.h" +#else +#include "verifier.h" +#endif + +#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(ZipWrap* zip, std::string* meta_data) { + long size = zip->GetUncompressedSize(METADATA_PATH); + if (size <= 0) + return false; + + meta_data->resize(size, '\0'); + if (!zip->ExtractToBuffer(METADATA_PATH, reinterpret_cast<uint8_t*>(&(*meta_data)[0]))) { + printf("Failed to read metadata in update package.\n"); + return false; + } + return true; +} + +// Read the build.version.incremental of src/tgt from the metadata and log it to last_install. +static void read_source_target_build(ZipWrap* 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) { + 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) { + 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(ZipWrap* 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]; + + property_get("ro.product.device", value, ""); + const std::string& pkg_device = metadata["pre-device"]; + if (pkg_device != value || pkg_device.empty()) { + 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; + } + + // Check for downgrade version. + int64_t build_timestampt = property_get_int64( + "ro.build.date.utc", std::numeric_limits<int64_t>::max()); + int64_t pkg_post_timespampt = 0; + // We allow to full update to the same version we are running, in case there + // is a problem with the current copy of that version. + if (metadata["post-timestamp"].empty() || + !android::base::ParseInt(metadata["post-timestamp"].c_str(), + &pkg_post_timespampt) || + pkg_post_timespampt < build_timestampt) { + if (metadata["ota-downgrade"] != "yes") { + printf("Update package is older than the current build, expected a " + "build newer than timestamp %" PRIu64 " but package has " + "timestamp %" PRIu64 " and downgrade not allowed.\n", + build_timestampt, pkg_post_timespampt); + return INSTALL_ERROR; + } + if (pkg_pre_build_fingerprint.empty()) { + printf("Downgrade package must have a pre-build version set, not " + "allowed.\n"); + return INSTALL_ERROR; + } + } + + return 0; +} + +int +abupdate_binary_command(const char* path, ZipWrap* zip, int retry_count, + int status_fd, std::vector<std::string>* cmd) +{ + 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)) { + printf("Can't find %s\n", AB_OTA_PAYLOAD_PROPERTIES); + return INSTALL_CORRUPT; + } + std::vector<unsigned char> payload_properties( + zip->GetUncompressedSize(AB_OTA_PAYLOAD_PROPERTIES)); + if (!zip->ExtractToBuffer(AB_OTA_PAYLOAD_PROPERTIES, payload_properties.data())) { + printf("Can't extract %s\n", AB_OTA_PAYLOAD_PROPERTIES); + return INSTALL_CORRUPT; + } + + if (!zip->EntryExists(AB_OTA_PAYLOAD)) { + printf("Can't find %s\n", AB_OTA_PAYLOAD); + return INSTALL_CORRUPT; + } + long payload_offset = zip->GetEntryOffset(AB_OTA_PAYLOAD); + *cmd = { + "/sbin/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 + +int +abupdate_binary_command(__unused const char* path, __unused ZipWrap* zip, __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; +} + +#ifdef USE_MINZIP +bool verify_package_compatibility(ZipWrap *package_zip) { + if (package_zip->EntryExists("compatibility.zip")) + printf("Cannot verify treble package compatibility, must build TWRP in Oreo tree or higher.\n"); + return true; +} +#else +// 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(ZipWrap *zw) { + ZipArchiveHandle package_zip = zw->GetZipArchiveHandle(); + printf("Verifying package compatibility...\n"); + + static constexpr const char* COMPATIBILITY_ZIP_ENTRY = "compatibility.zip"; + ZipString compatibility_entry_name(COMPATIBILITY_ZIP_ENTRY); + ZipEntry compatibility_entry; + if (FindEntry(package_zip, 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(package_zip, &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; + ZipString 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.name, ErrorCodeString(ret)); + CloseArchive(zip_handle); + return false; + } + compatibility_info.emplace_back(std::move(content)); + } + CloseArchive(zip_handle); + + // VintfObjectRecovery::CheckCompatibility returns zero on success. + std::string err; + int result = android::vintf::VintfObjectRecovery::CheckCompatibility(compatibility_info, &err); + if (result == 0) { + return true; + } + + printf("Failed to verify package compatibility (result %i): %s\n", result, err.c_str()); + return false; +} +#endif |