blob: a2a416e3a0ee1d6ddd1c34eeeee2224c7d57c2ff [file] [log] [blame]
/*
* 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 "install/install.h"
#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include <inttypes.h>
#include <limits.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <unistd.h>
#include <algorithm>
#include <atomic>
#include <chrono>
#include <condition_variable>
#include <filesystem>
#include <functional>
#include <limits>
#include <mutex>
#include <thread>
#include <vector>
#include <android-base/file.h>
#include <android-base/logging.h>
#include <android-base/parsedouble.h>
#include <android-base/parseint.h>
#include <android-base/properties.h>
#include <android-base/stringprintf.h>
#include <android-base/strings.h>
#include <android-base/unique_fd.h>
#include "install/spl_check.h"
#include "install/wipe_data.h"
#include "install/wipe_device.h"
#include "otautil/error_code.h"
#include "otautil/package.h"
#include "otautil/paths.h"
#include "otautil/sysutil.h"
#include "otautil/verifier.h"
#include "private/setup_commands.h"
#include "recovery_ui/ui.h"
#include "recovery_utils/roots.h"
#include "recovery_utils/thermalutil.h"
using namespace std::chrono_literals;
static constexpr int kRecoveryApiVersion = 3;
// We define RECOVERY_API_VERSION in Android.mk, which will be picked up by build system and packed
// into target_files.zip. Assert the version defined in code and in Android.mk are consistent.
static_assert(kRecoveryApiVersion == RECOVERY_API_VERSION, "Mismatching recovery API versions.");
// Default allocation of progress bar segments to operations
// static constexpr int VERIFICATION_PROGRESS_TIME = 60;
// static constexpr float VERIFICATION_PROGRESS_FRACTION = 0.25;
// The charater used to separate dynamic fingerprints. e.x. sargo|aosp-sargo
static const char* FINGERPRING_SEPARATOR = "|";
static constexpr auto&& RELEASE_KEYS_TAG = "release-keys";
// If brick packages are smaller than |MEMORY_PACKAGE_LIMIT|, read the entire package into memory
static constexpr size_t MEMORY_PACKAGE_LIMIT = 1024 * 1024;
static std::condition_variable finish_log_temperature;
static bool isInStringList(const std::string& target_token, const std::string& str_list,
const std::string& deliminator);
bool ReadMetadataFromPackage(ZipArchiveHandle zip, std::map<std::string, std::string>* metadata) {
CHECK(metadata != nullptr);
static constexpr const char* METADATA_PATH = "META-INF/com/android/metadata";
ZipEntry64 entry;
if (FindEntry(zip, METADATA_PATH, &entry) != 0) {
LOG(ERROR) << "Failed to find " << METADATA_PATH;
return false;
}
uint32_t length = entry.uncompressed_length;
std::string metadata_string(length, '\0');
int32_t err =
ExtractToMemory(zip, &entry, reinterpret_cast<uint8_t*>(&metadata_string[0]), length);
if (err != 0) {
LOG(ERROR) << "Failed to extract " << METADATA_PATH << ": " << ErrorCodeString(err);
return false;
}
for (const std::string& line : android::base::Split(metadata_string, "\n")) {
size_t eq = line.find('=');
if (eq != std::string::npos) {
metadata->emplace(android::base::Trim(line.substr(0, eq)),
android::base::Trim(line.substr(eq + 1)));
}
}
return true;
}
// Gets the value for the given key in |metadata|. Returns an emtpy string if the key isn't
// present.
static std::string get_value(const std::map<std::string, std::string>& metadata,
const std::string& key) {
const auto& it = metadata.find(key);
return (it == metadata.end()) ? "" : it->second;
}
static std::string OtaTypeToString(OtaType type) {
switch (type) {
case OtaType::AB:
return "AB";
case OtaType::BLOCK:
return "BLOCK";
case OtaType::BRICK:
return "BRICK";
}
}
// Read the build.version.incremental of src/tgt from the metadata and log it to last_install.
static void ReadSourceTargetBuild(const std::map<std::string, std::string>& metadata,
std::vector<std::string>* log_buffer) {
// Examples of the pre-build and post-build strings in metadata:
// pre-build-incremental=2943039
// post-build-incremental=2951741
auto source_build = get_value(metadata, "pre-build-incremental");
if (!source_build.empty()) {
log_buffer->push_back("source_build: " + source_build);
}
auto target_build = get_value(metadata, "post-build-incremental");
if (!target_build.empty()) {
log_buffer->push_back("target_build: " + target_build);
}
}
// Checks the build version, fingerprint and timestamp in the metadata of the A/B package.
// Downgrading is not allowed unless explicitly enabled in the package and only for
// incremental packages.
static bool CheckAbSpecificMetadata(const std::map<std::string, std::string>& metadata) {
// Incremental updates should match the current build.
auto device_pre_build = android::base::GetProperty("ro.build.version.incremental", "");
auto pkg_pre_build = get_value(metadata, "pre-build-incremental");
if (!pkg_pre_build.empty() && pkg_pre_build != device_pre_build) {
LOG(ERROR) << "Package is for source build " << pkg_pre_build << " but expected "
<< device_pre_build;
return false;
}
auto device_fingerprint = android::base::GetProperty("ro.build.fingerprint", "");
auto pkg_pre_build_fingerprint = get_value(metadata, "pre-build");
if (!pkg_pre_build_fingerprint.empty() &&
!isInStringList(device_fingerprint, pkg_pre_build_fingerprint, FINGERPRING_SEPARATOR)) {
LOG(ERROR) << "Package is for source build " << pkg_pre_build_fingerprint << " but expected "
<< device_fingerprint;
return false;
}
// Check for downgrade version.
int64_t build_timestamp =
android::base::GetIntProperty("ro.build.date.utc", std::numeric_limits<int64_t>::max());
int64_t pkg_post_timestamp = 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.
auto pkg_post_timestamp_string = get_value(metadata, "post-timestamp");
if (pkg_post_timestamp_string.empty() ||
!android::base::ParseInt(pkg_post_timestamp_string, &pkg_post_timestamp) ||
pkg_post_timestamp < build_timestamp) {
if (get_value(metadata, "ota-downgrade") != "yes") {
LOG(ERROR) << "Update package is older than the current build, expected a build "
"newer than timestamp "
<< build_timestamp << " but package has timestamp " << pkg_post_timestamp
<< " and downgrade not allowed.";
return false;
}
if (pkg_pre_build_fingerprint.empty()) {
LOG(ERROR) << "Downgrade package must have a pre-build version set, not allowed.";
return false;
}
}
return true;
}
bool CheckPackageMetadata(const std::map<std::string, std::string>& metadata, OtaType ota_type) {
auto package_ota_type = get_value(metadata, "ota-type");
auto expected_ota_type = OtaTypeToString(ota_type);
if (ota_type != OtaType::AB && ota_type != OtaType::BRICK) {
LOG(INFO) << "Skip package metadata check for ota type " << expected_ota_type;
return true;
}
if (package_ota_type != expected_ota_type) {
LOG(ERROR) << "Unexpected ota package type, expects " << expected_ota_type << ", actual "
<< package_ota_type;
return false;
}
auto device = android::base::GetProperty("ro.product.device", "");
auto pkg_device = get_value(metadata, "pre-device");
// device name can be a | separated list, so need to check
if (pkg_device.empty() || !isInStringList(device, pkg_device, FINGERPRING_SEPARATOR)) {
LOG(ERROR) << "Package is for product " << pkg_device << " but expected " << device;
return false;
}
// We allow the package to not have any serialno; and we also allow it to carry multiple serial
// numbers split by "|"; e.g. serialno=serialno1|serialno2|serialno3 ... We will fail the
// verification if the device's serialno doesn't match any of these carried numbers.
auto pkg_serial_no = get_value(metadata, "serialno");
if (!pkg_serial_no.empty()) {
auto device_serial_no = android::base::GetProperty("ro.serialno", "");
bool serial_number_match = false;
for (const auto& number : android::base::Split(pkg_serial_no, "|")) {
if (device_serial_no == android::base::Trim(number)) {
serial_number_match = true;
}
}
if (!serial_number_match) {
LOG(ERROR) << "Package is for serial " << pkg_serial_no;
return false;
}
} else if (ota_type == OtaType::BRICK) {
const auto device_build_tag = android::base::GetProperty("ro.build.tags", "");
if (device_build_tag.empty()) {
LOG(ERROR) << "Unable to determine device build tags, serial number is missing from package. "
"Rejecting the brick OTA package.";
return false;
}
if (device_build_tag == RELEASE_KEYS_TAG) {
LOG(ERROR) << "Device is release key build, serial number is missing from package. "
"Rejecting the brick OTA package.";
return false;
}
LOG(INFO)
<< "Serial number is missing from brick OTA package, permitting anyway because device is "
<< device_build_tag;
}
if (ota_type == OtaType::AB) {
return CheckAbSpecificMetadata(metadata);
}
return true;
}
static std::string ExtractPayloadProperties(ZipArchiveHandle zip) {
// For A/B updates we extract the payload properties to a buffer and obtain the RAW payload offset
// in the zip file.
static constexpr const char* AB_OTA_PAYLOAD_PROPERTIES = "payload_properties.txt";
ZipEntry64 properties_entry;
if (FindEntry(zip, AB_OTA_PAYLOAD_PROPERTIES, &properties_entry) != 0) {
LOG(ERROR) << "Failed to find " << AB_OTA_PAYLOAD_PROPERTIES;
return {};
}
auto properties_entry_length = properties_entry.uncompressed_length;
if (properties_entry_length > std::numeric_limits<size_t>::max()) {
LOG(ERROR) << "Failed to extract " << AB_OTA_PAYLOAD_PROPERTIES
<< " because's uncompressed size exceeds size of address space. "
<< properties_entry_length;
return {};
}
std::string payload_properties(properties_entry_length, '\0');
int32_t err =
ExtractToMemory(zip, &properties_entry, reinterpret_cast<uint8_t*>(payload_properties.data()),
properties_entry_length);
if (err != 0) {
LOG(ERROR) << "Failed to extract " << AB_OTA_PAYLOAD_PROPERTIES << ": " << ErrorCodeString(err);
return {};
}
return payload_properties;
}
bool SetUpAbUpdateCommands(const std::string& package, ZipArchiveHandle zip, int status_fd,
std::vector<std::string>* cmd) {
CHECK(cmd != nullptr);
// For A/B updates we extract the payload properties to a buffer and obtain the RAW payload offset
// in the zip file.
const auto payload_properties = ExtractPayloadProperties(zip);
if (payload_properties.empty()) {
return false;
}
static constexpr const char* AB_OTA_PAYLOAD = "payload.bin";
ZipEntry64 payload_entry;
if (FindEntry(zip, AB_OTA_PAYLOAD, &payload_entry) != 0) {
LOG(ERROR) << "Failed to find " << AB_OTA_PAYLOAD;
return false;
}
long payload_offset = payload_entry.offset;
*cmd = {
"/system/bin/update_engine_sideload",
"--payload=file://" + package,
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 true;
}
bool SetUpNonAbUpdateCommands(const std::string& package, ZipArchiveHandle zip, int retry_count,
int status_fd, std::vector<std::string>* cmd) {
CHECK(cmd != nullptr);
// In non-A/B updates we extract the update binary from the package.
static constexpr const char* UPDATE_BINARY_NAME = "META-INF/com/google/android/update-binary";
ZipEntry64 binary_entry;
if (FindEntry(zip, UPDATE_BINARY_NAME, &binary_entry) != 0) {
LOG(ERROR) << "Failed to find update binary " << UPDATE_BINARY_NAME;
return false;
}
const std::string binary_path = Paths::Get().temporary_update_binary();
unlink(binary_path.c_str());
android::base::unique_fd fd(
open(binary_path.c_str(), O_CREAT | O_WRONLY | O_TRUNC | O_CLOEXEC, 0755));
if (fd == -1) {
PLOG(ERROR) << "Failed to create " << binary_path;
return false;
}
if (auto error = ExtractEntryToFile(zip, &binary_entry, fd); error != 0) {
LOG(ERROR) << "Failed to extract " << UPDATE_BINARY_NAME << ": " << ErrorCodeString(error);
return false;
}
// When executing the update binary contained in the package, the arguments passed are:
// - the version number for this interface
// - an FD to which the program can write in order to update the progress bar.
// - the name of the package zip file.
// - an optional argument "retry" if this update is a retry of a failed update attempt.
*cmd = {
binary_path,
std::to_string(kRecoveryApiVersion),
std::to_string(status_fd),
package,
};
if (retry_count > 0) {
cmd->push_back("retry");
}
return true;
}
static void log_max_temperature(int* max_temperature, const std::atomic<bool>& logger_finished) {
CHECK(max_temperature != nullptr);
std::mutex mtx;
std::unique_lock<std::mutex> lck(mtx);
while (!logger_finished.load() &&
finish_log_temperature.wait_for(lck, 20s) == std::cv_status::timeout) {
*max_temperature = std::max(*max_temperature, GetMaxValueFromThermalZone());
}
}
static bool PerformPowerwashIfRequired(ZipArchiveHandle zip, Device *device) {
const auto payload_properties = ExtractPayloadProperties(zip);
if (payload_properties.find("POWERWASH=1") != std::string::npos) {
LOG(INFO) << "Payload properties has POWERWASH=1, wiping userdata...";
return WipeData(device);
}
return true;
}
// If the package contains an update binary, extract it and run it.
static InstallResult TryUpdateBinary(Package* package, bool* wipe_cache,
std::vector<std::string>* log_buffer, int retry_count,
int* max_temperature) {
std::map<std::string, std::string> metadata;
auto zip = package->GetZipArchiveHandle();
if (!ReadMetadataFromPackage(zip, &metadata)) {
LOG(ERROR) << "Failed to parse metadata in the zip file";
return INSTALL_CORRUPT;
}
const bool package_is_ab = get_value(metadata, "ota-type") == OtaTypeToString(OtaType::AB);
const bool package_is_brick = get_value(metadata, "ota-type") == OtaTypeToString(OtaType::BRICK);
if (package_is_brick) {
LOG(INFO) << "Installing a brick package";
if (package->GetType() == PackageType::kFile &&
package->GetPackageSize() < MEMORY_PACKAGE_LIMIT) {
std::vector<uint8_t> content(package->GetPackageSize());
if (package->ReadFullyAtOffset(content.data(), content.size(), 0)) {
auto memory_package = Package::CreateMemoryPackage(std::move(content), {});
return WipeAbDevice(device, memory_package.get()) ? INSTALL_SUCCESS : INSTALL_ERROR;
}
}
return WipeAbDevice(device, package) ? INSTALL_SUCCESS : INSTALL_ERROR;
}
bool device_supports_ab = android::base::GetBoolProperty("ro.build.ab_update", false);
bool ab_device_supports_nonab =
android::base::GetBoolProperty("ro.virtual_ab.allow_non_ab", false);
bool device_only_supports_ab = device_supports_ab && !ab_device_supports_nonab;
const auto current_spl = android::base::GetProperty("ro.build.version.security_patch", "");
if (ViolatesSPLDowngrade(zip, current_spl)) {
LOG(ERROR) << "Denying OTA because it's SPL downgrade";
return INSTALL_ERROR;
}
if (package_is_ab) {
CHECK(package->GetType() == PackageType::kFile);
}
// Verify against the metadata in the package first. Expects A/B metadata if:
// Package declares itself as an A/B package
// Package does not declare itself as an A/B package, but device only supports A/B;
// still calls CheckPackageMetadata to get a meaningful error message.
if (package_is_ab || device_only_supports_ab) {
if (!CheckPackageMetadata(metadata, OtaType::AB)) {
log_buffer->push_back(android::base::StringPrintf("error: %d", kUpdateBinaryCommandFailure));
return INSTALL_ERROR;
}
}
ReadSourceTargetBuild(metadata, log_buffer);
// The updater in child process writes to the pipe to communicate with recovery.
android::base::unique_fd pipe_read, pipe_write;
// Explicitly disable O_CLOEXEC using 0 as the flags (last) parameter to Pipe
// so that the child updater process will recieve a non-closed fd.
if (!android::base::Pipe(&pipe_read, &pipe_write, 0)) {
PLOG(ERROR) << "Failed to create pipe for updater-recovery communication";
return INSTALL_CORRUPT;
}
// The updater-recovery communication protocol.
//
// progress <frac> <secs>
// fill up the next <frac> part of of the progress bar over <secs> seconds. If <secs> is
// zero, use `set_progress` commands to manually control the progress of this segment of the
// bar.
//
// set_progress <frac>
// <frac> should be between 0.0 and 1.0; sets the progress bar within the segment defined by
// the most recent progress command.
//
// ui_print <string>
// display <string> on the screen.
//
// wipe_cache
// a wipe of cache will be performed following a successful installation.
//
// clear_display
// turn off the text display.
//
// enable_reboot
// packages can explicitly request that they want the user to be able to reboot during
// installation (useful for debugging packages that don't exit).
//
// retry_update
// updater encounters some issue during the update. It requests a reboot to retry the same
// package automatically.
//
// log <string>
// updater requests logging the string (e.g. cause of the failure).
//
std::string package_path = package->GetPath();
std::vector<std::string> args;
if (auto setup_result =
package_is_ab
? SetUpAbUpdateCommands(package_path, zip, pipe_write.get(), &args)
: SetUpNonAbUpdateCommands(package_path, zip, retry_count, pipe_write.get(), &args);
!setup_result) {
log_buffer->push_back(android::base::StringPrintf("error: %d", kUpdateBinaryCommandFailure));
return INSTALL_CORRUPT;
}
pid_t pid = fork();
if (pid == -1) {
PLOG(ERROR) << "Failed to fork update binary";
log_buffer->push_back(android::base::StringPrintf("error: %d", kForkUpdateBinaryFailure));
return INSTALL_ERROR;
}
if (pid == 0) {
umask(022);
pipe_read.reset();
// Convert the std::string vector to a NULL-terminated char* vector suitable for execv.
auto chr_args = StringVectorToNullTerminatedArray(args);
execv(chr_args[0], chr_args.data());
// We shouldn't use LOG/PLOG in the forked process, since they may cause the child process to
// hang. This deadlock results from an improperly copied mutex in the ui functions.
// (Bug: 34769056)
fprintf(stdout, "E:Can't run %s (%s)\n", chr_args[0], strerror(errno));
_exit(EXIT_FAILURE);
}
pipe_write.reset();
std::atomic<bool> logger_finished(false);
std::thread temperature_logger(log_max_temperature, max_temperature, std::ref(logger_finished));
*wipe_cache = false;
bool retry_update = false;
char buffer[1024];
FILE* from_child = android::base::Fdopen(std::move(pipe_read), "r");
while (fgets(buffer, sizeof(buffer), from_child) != nullptr) {
std::string line(buffer);
size_t space = line.find_first_of(" \n");
std::string command(line.substr(0, space));
if (command.empty()) continue;
// Get rid of the leading and trailing space and/or newline.
std::string args = space == std::string::npos ? "" : android::base::Trim(line.substr(space));
if (command == "progress") {
std::vector<std::string> tokens = android::base::Split(args, " ");
double fraction;
int seconds;
if (tokens.size() == 2 && android::base::ParseDouble(tokens[0].c_str(), &fraction) &&
android::base::ParseInt(tokens[1], &seconds)) {
// ui->ShowProgress(fraction * (1 - VERIFICATION_PROGRESS_FRACTION), seconds);
} else {
LOG(ERROR) << "invalid \"progress\" parameters: " << line;
}
} else if (command == "set_progress") {
std::vector<std::string> tokens = android::base::Split(args, " ");
double fraction;
if (tokens.size() == 1 && android::base::ParseDouble(tokens[0].c_str(), &fraction)) {
// ui->SetProgress(fraction);
} else {
LOG(ERROR) << "invalid \"set_progress\" parameters: " << line;
}
} else if (command == "ui_print") {
// ui->PrintOnScreenOnly("%s\n", args.c_str());
fflush(stdout);
} else if (command == "wipe_cache") {
*wipe_cache = true;
} else if (command == "clear_display") {
// ui->SetBackground(RecoveryUI::NONE);
} else if (command == "enable_reboot") {
// packages can explicitly request that they want the user
// to be able to reboot during installation (useful for
// debugging packages that don't exit).
// ui->SetEnableReboot(true);
} else if (command == "retry_update") {
retry_update = true;
} else if (command == "log") {
if (!args.empty()) {
// Save the logging request from updater and write to last_install later.
log_buffer->push_back(args);
} else {
LOG(ERROR) << "invalid \"log\" parameters: " << line;
}
} else {
LOG(ERROR) << "unknown command [" << command << "]";
}
}
fclose(from_child);
int status;
waitpid(pid, &status, 0);
logger_finished.store(true);
finish_log_temperature.notify_one();
temperature_logger.join();
if (retry_update) {
return INSTALL_RETRY;
}
if (WIFEXITED(status)) {
if (WEXITSTATUS(status) != EXIT_SUCCESS) {
LOG(ERROR) << "Error in " << package_path << " (status " << WEXITSTATUS(status) << ")";
return INSTALL_ERROR;
}
} else if (WIFSIGNALED(status)) {
LOG(ERROR) << "Error in " << package_path << " (killed by signal " << WTERMSIG(status) << ")";
return INSTALL_ERROR;
} else {
LOG(FATAL) << "Invalid status code " << status;
}
if (package_is_ab) {
PerformPowerwashIfRequired(zip, device);
}
return INSTALL_SUCCESS;
}
static InstallResult VerifyAndInstallPackage(Package* package, bool* wipe_cache,
std::vector<std::string>* log_buffer, int retry_count,
int* max_temperature) {
// ui->SetBackground(RecoveryUI::INSTALLING_UPDATE);
// Give verification half the progress bar...
// ui->SetProgressType(RecoveryUI::DETERMINATE);
// ui->ShowProgress(VERIFICATION_PROGRESS_FRACTION, VERIFICATION_PROGRESS_TIME);
// Verify package.
if (!verify_package(package)) {
log_buffer->push_back(android::base::StringPrintf("error: %d", kZipVerificationFailure));
return INSTALL_CORRUPT;
}
// Verify and install the contents of the package.
// ui->Print("Installing update...\n");
// if (retry_count > 0) {
// ui->Print("Retry attempt: %d\n", retry_count);
// }
// ui->SetEnableReboot(false);
auto result = TryUpdateBinary(package, wipe_cache, log_buffer, retry_count, max_temperature);
// ui->SetEnableReboot(true);
// ui->Print("\n");
return result;
}
InstallResult InstallPackage(Package* package, const std::string_view package_id,
bool should_wipe_cache, int retry_count) {
auto start = std::chrono::system_clock::now();
int start_temperature = GetMaxValueFromThermalZone();
int max_temperature = start_temperature;
InstallResult result;
std::vector<std::string> log_buffer;
// ui->Print("Supported API: %d\n", kRecoveryApiVersion);
// ui->Print("Finding update package...\n");
LOG(INFO) << "Update package id: " << package_id;
if (!package) {
log_buffer.push_back(android::base::StringPrintf("error: %d", kMapFileFailure));
result = INSTALL_CORRUPT;
} else if (setup_install_mounts() != 0) {
LOG(ERROR) << "failed to set up expected mounts for install; aborting";
result = INSTALL_ERROR;
} else {
bool updater_wipe_cache = false;
result = VerifyAndInstallPackage(package, &updater_wipe_cache, &log_buffer, retry_count,
&max_temperature);
should_wipe_cache = should_wipe_cache || updater_wipe_cache;
}
// Measure the time spent to apply OTA update in seconds.
std::chrono::duration<double> duration = std::chrono::system_clock::now() - start;
int time_total = static_cast<int>(duration.count());
bool has_cache = volume_for_mount_point("/cache") != nullptr;
// Skip logging the uncrypt_status on devices without /cache.
if (has_cache) {
static constexpr const char* UNCRYPT_STATUS = "/cache/recovery/uncrypt_status";
if (ensure_path_mounted(UNCRYPT_STATUS) != 0) {
LOG(WARNING) << "Can't mount " << UNCRYPT_STATUS;
} else {
std::string uncrypt_status;
if (!android::base::ReadFileToString(UNCRYPT_STATUS, &uncrypt_status)) {
PLOG(WARNING) << "failed to read uncrypt status";
} else if (!android::base::StartsWith(uncrypt_status, "uncrypt_")) {
LOG(WARNING) << "corrupted uncrypt_status: " << uncrypt_status;
} else {
log_buffer.push_back(android::base::Trim(uncrypt_status));
}
}
}
// The first two lines need to be the package name and install result.
std::vector<std::string> log_header = {
std::string(package_id),
result == INSTALL_SUCCESS ? "1" : "0",
"time_total: " + std::to_string(time_total),
"retry: " + std::to_string(retry_count),
};
int end_temperature = GetMaxValueFromThermalZone();
max_temperature = std::max(end_temperature, max_temperature);
if (start_temperature > 0) {
log_buffer.push_back("temperature_start: " + std::to_string(start_temperature));
}
if (end_temperature > 0) {
log_buffer.push_back("temperature_end: " + std::to_string(end_temperature));
}
if (max_temperature > 0) {
log_buffer.push_back("temperature_max: " + std::to_string(max_temperature));
}
std::string log_content =
android::base::Join(log_header, "\n") + "\n" + android::base::Join(log_buffer, "\n") + "\n";
const std::string& install_file = Paths::Get().temporary_install_file();
if (!android::base::WriteStringToFile(log_content, install_file)) {
PLOG(ERROR) << "failed to write " << install_file;
}
// Write a copy into last_log.
LOG(INFO) << log_content;
if (result == INSTALL_SUCCESS && should_wipe_cache) {
if (!WipeCache(nullptr)) {
result = INSTALL_ERROR;
}
}
return result;
}
bool verify_package(Package* package) {
static constexpr const char* CERTIFICATE_ZIP_FILE = "/system/etc/security/otacerts.zip";
std::vector<Certificate> loaded_keys = LoadKeysFromZipfile(CERTIFICATE_ZIP_FILE);
if (loaded_keys.empty()) {
LOG(ERROR) << "Failed to load keys";
return false;
}
LOG(INFO) << loaded_keys.size() << " key(s) loaded from " << CERTIFICATE_ZIP_FILE;
// Verify package.
// ui->Print("Verifying update package...\n");
// auto t0 = std::chrono::system_clock::now();
int err = verify_file(package, loaded_keys);
// std::chrono::duration<double> duration = std::chrono::system_clock::now() - t0;
// ui->Print("Update package verification took %.1f s (result %d).\n", duration.count(), err);
if (err != VERIFY_SUCCESS) {
LOG(ERROR) << "Signature verification failed";
LOG(ERROR) << "error: " << kZipVerificationFailure;
return false;
}
return true;
}
bool SetupPackageMount(const std::string& package_path, bool* should_use_fuse) {
CHECK(should_use_fuse != nullptr);
if (package_path.empty()) {
return false;
}
*should_use_fuse = true;
if (package_path[0] == '@') {
auto block_map_path = package_path.substr(1);
if (ensure_path_mounted(block_map_path) != 0) {
LOG(ERROR) << "Failed to mount " << block_map_path;
return false;
}
// uncrypt only produces block map only if the package stays on /data.
*should_use_fuse = false;
return true;
}
// Package is not a block map file.
if (ensure_path_mounted(package_path) != 0) {
LOG(ERROR) << "Failed to mount " << package_path;
return false;
}
// Reject the package if the input path doesn't equal the canonicalized path.
// e.g. /cache/../sdcard/update_package.
std::error_code ec;
auto canonical_path = std::filesystem::canonical(package_path, ec);
if (ec) {
LOG(ERROR) << "Failed to get canonical of " << package_path << ", " << ec.message();
return false;
}
if (canonical_path.string() != package_path) {
LOG(ERROR) << "Installation aborts. The canonical path " << canonical_path.string()
<< " doesn't equal the original path " << package_path;
return false;
}
constexpr const char* CACHE_ROOT = "/cache";
if (android::base::StartsWith(package_path, CACHE_ROOT)) {
*should_use_fuse = false;
}
return true;
}
// Check if `target_token` is in string `str_list`, where `str_list` is expected to be a
// list delimited by `deliminator`
// E.X. isInStringList("a", "a|b|c|d", "|") => true
// E.X. isInStringList("abc", "abc", "|") => true
static bool isInStringList(const std::string& target_token, const std::string& str_list,
const std::string& deliminator) {
if (target_token.length() > str_list.length()) {
return false;
} else if (target_token.length() == str_list.length() || deliminator.length() == 0) {
return target_token == str_list;
}
auto&& list = android::base::Split(str_list, deliminator);
return std::find(list.begin(), list.end(), target_token) != list.end();
}