1 files changed, 730 insertions, 0 deletions

diff --git a/install/install.cpp b/install/install.cpp
new file mode 100644
index 000000000..a1124c361
--- /dev/null
+++ b/install/install.cpp
@@ -0,0 +1,730 @@
+/*
+ * 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 <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 <vintf/VintfObjectRecovery.h>
+
+#include "install/package.h"
+#include "install/verifier.h"
+#include "otautil/error_code.h"
+#include "otautil/paths.h"
+#include "otautil/roots.h"
+#include "otautil/sysutil.h"
+#include "otautil/thermalutil.h"
+#include "private/setup_commands.h"
+#include "recovery_ui/ui.h"
+
+using namespace std::chrono_literals;
+
+static constexpr int kRecoveryApiVersion = 3;
+// 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;
+
+static std::condition_variable finish_log_temperature;
+
+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";
+  ZipString path(METADATA_PATH);
+  ZipEntry entry;
+  if (FindEntry(zip, 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 int 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 INSTALL_ERROR;
+  }
+
+  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() && pkg_pre_build_fingerprint != device_fingerprint) {
+    LOG(ERROR) << "Package is for source build " << pkg_pre_build_fingerprint << " but expected "
+               << device_fingerprint;
+    return INSTALL_ERROR;
+  }
+
+  // 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 INSTALL_ERROR;
+    }
+    if (pkg_pre_build_fingerprint.empty()) {
+      LOG(ERROR) << "Downgrade package must have a pre-build version set, not allowed.";
+      return INSTALL_ERROR;
+    }
+  }
+
+  return 0;
+}
+
+int 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 0;
+  }
+
+  if (package_ota_type != expected_ota_type) {
+    LOG(ERROR) << "Unexpected ota package type, expects " << expected_ota_type << ", actual "
+               << package_ota_type;
+    return INSTALL_ERROR;
+  }
+
+  auto device = android::base::GetProperty("ro.product.device", "");
+  auto pkg_device = get_value(metadata, "pre-device");
+  if (pkg_device != device || pkg_device.empty()) {
+    LOG(ERROR) << "Package is for product " << pkg_device << " but expected " << device;
+    return INSTALL_ERROR;
+  }
+
+  // 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 INSTALL_ERROR;
+    }
+  }
+
+  if (ota_type == OtaType::AB) {
+    return CheckAbSpecificMetadata(metadata);
+  }
+
+  return 0;
+}
+
+int 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.
+  static constexpr const char* AB_OTA_PAYLOAD_PROPERTIES = "payload_properties.txt";
+  ZipString property_name(AB_OTA_PAYLOAD_PROPERTIES);
+  ZipEntry properties_entry;
+  if (FindEntry(zip, property_name, &properties_entry) != 0) {
+    LOG(ERROR) << "Failed to find " << AB_OTA_PAYLOAD_PROPERTIES;
+    return INSTALL_CORRUPT;
+  }
+  uint32_t properties_entry_length = properties_entry.uncompressed_length;
+  std::vector<uint8_t> payload_properties(properties_entry_length);
+  int32_t err =
+      ExtractToMemory(zip, &properties_entry, payload_properties.data(), properties_entry_length);
+  if (err != 0) {
+    LOG(ERROR) << "Failed to extract " << AB_OTA_PAYLOAD_PROPERTIES << ": " << ErrorCodeString(err);
+    return INSTALL_CORRUPT;
+  }
+
+  static constexpr const char* AB_OTA_PAYLOAD = "payload.bin";
+  ZipString payload_name(AB_OTA_PAYLOAD);
+  ZipEntry payload_entry;
+  if (FindEntry(zip, payload_name, &payload_entry) != 0) {
+    LOG(ERROR) << "Failed to find " << AB_OTA_PAYLOAD;
+    return INSTALL_CORRUPT;
+  }
+  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 0;
+}
+
+int 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";
+  ZipString binary_name(UPDATE_BINARY_NAME);
+  ZipEntry binary_entry;
+  if (FindEntry(zip, binary_name, &binary_entry) != 0) {
+    LOG(ERROR) << "Failed to find update binary " << UPDATE_BINARY_NAME;
+    return INSTALL_CORRUPT;
+  }
+
+  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 INSTALL_ERROR;
+  }
+
+  int32_t error = ExtractEntryToFile(zip, &binary_entry, fd);
+  if (error != 0) {
+    LOG(ERROR) << "Failed to extract " << UPDATE_BINARY_NAME << ": " << ErrorCodeString(error);
+    return INSTALL_ERROR;
+  }
+
+  // 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 0;
+}
+
+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());
+  }
+}
+
+// If the package contains an update binary, extract it and run it.
+static int try_update_binary(const std::string& package, ZipArchiveHandle zip, bool* wipe_cache,
+                             std::vector<std::string>* log_buffer, int retry_count,
+                             int* max_temperature, RecoveryUI* ui) {
+  std::map<std::string, std::string> metadata;
+  if (!ReadMetadataFromPackage(zip, &metadata)) {
+    LOG(ERROR) << "Failed to parse metadata in the zip file";
+    return INSTALL_CORRUPT;
+  }
+
+  bool is_ab = android::base::GetBoolProperty("ro.build.ab_update", false);
+  // Verifies against the metadata in the package first.
+  if (int check_status = is_ab ? CheckPackageMetadata(metadata, OtaType::AB) : 0;
+      check_status != 0) {
+    log_buffer->push_back(android::base::StringPrintf("error: %d", kUpdateBinaryCommandFailure));
+    return check_status;
+  }
+
+  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::vector<std::string> args;
+  if (int update_status =
+          is_ab ? SetUpAbUpdateCommands(package, zip, pipe_write.get(), &args)
+                : SetUpNonAbUpdateCommands(package, zip, retry_count, pipe_write.get(), &args);
+      update_status != 0) {
+    log_buffer->push_back(android::base::StringPrintf("error: %d", kUpdateBinaryCommandFailure));
+    return update_status;
+  }
+
+  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 << " (status " << WEXITSTATUS(status) << ")";
+      return INSTALL_ERROR;
+    }
+  } else if (WIFSIGNALED(status)) {
+    LOG(ERROR) << "Error in " << package << " (killed by signal " << WTERMSIG(status) << ")";
+    return INSTALL_ERROR;
+  } else {
+    LOG(FATAL) << "Invalid status code " << status;
+  }
+
+  return INSTALL_SUCCESS;
+}
+
+// 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 package_zip) {
+  LOG(INFO) << "Verifying package compatibility...";
+
+  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) {
+    LOG(INFO) << "Package doesn't contain " << COMPATIBILITY_ZIP_ENTRY << " 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) {
+    LOG(ERROR) << "Failed to read " << 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) {
+    LOG(ERROR) << "Failed to OpenArchiveFromMemory: " << 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) {
+    LOG(ERROR) << "Failed to start iterating zip entries: " << 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) {
+      LOG(ERROR) << "Failed to read " << 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;
+  }
+
+  LOG(ERROR) << "Failed to verify package compatibility (result " << result << "): " << err;
+  return false;
+}
+
+static int really_install_package(const std::string& path, bool* wipe_cache, bool needs_mount,
+                                  std::vector<std::string>* log_buffer, int retry_count,
+                                  int* max_temperature, RecoveryUI* ui) {
+  ui->SetBackground(RecoveryUI::INSTALLING_UPDATE);
+  ui->Print("Finding update package...\n");
+  // Give verification half the progress bar...
+  ui->SetProgressType(RecoveryUI::DETERMINATE);
+  ui->ShowProgress(VERIFICATION_PROGRESS_FRACTION, VERIFICATION_PROGRESS_TIME);
+  LOG(INFO) << "Update location: " << path;
+
+  // Map the update package into memory.
+  ui->Print("Opening update package...\n");
+
+  if (needs_mount) {
+    if (path[0] == '@') {
+      ensure_path_mounted(path.substr(1));
+    } else {
+      ensure_path_mounted(path);
+    }
+  }
+
+  auto package = Package::CreateMemoryPackage(
+      path, std::bind(&RecoveryUI::SetProgress, ui, std::placeholders::_1));
+  if (!package) {
+    log_buffer->push_back(android::base::StringPrintf("error: %d", kMapFileFailure));
+    return INSTALL_CORRUPT;
+  }
+
+  // Verify package.
+  if (!verify_package(package.get(), ui)) {
+    log_buffer->push_back(android::base::StringPrintf("error: %d", kZipVerificationFailure));
+    return INSTALL_CORRUPT;
+  }
+
+  // Try to open the package.
+  ZipArchiveHandle zip = package->GetZipArchiveHandle();
+  if (!zip) {
+    log_buffer->push_back(android::base::StringPrintf("error: %d", kZipOpenFailure));
+    return INSTALL_CORRUPT;
+  }
+
+  // Additionally verify the compatibility of the package if it's a fresh install.
+  if (retry_count == 0 && !verify_package_compatibility(zip)) {
+    log_buffer->push_back(android::base::StringPrintf("error: %d", kPackageCompatibilityFailure));
+    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);
+  int result =
+      try_update_binary(path, zip, wipe_cache, log_buffer, retry_count, max_temperature, ui);
+  ui->SetEnableReboot(true);
+  ui->Print("\n");
+
+  return result;
+}
+
+int install_package(const std::string& path, bool* wipe_cache, bool needs_mount, int retry_count,
+                    RecoveryUI* ui) {
+  CHECK(!path.empty());
+  CHECK(wipe_cache != nullptr);
+
+  auto start = std::chrono::system_clock::now();
+
+  int start_temperature = GetMaxValueFromThermalZone();
+  int max_temperature = start_temperature;
+
+  int result;
+  std::vector<std::string> log_buffer;
+  if (setup_install_mounts() != 0) {
+    LOG(ERROR) << "failed to set up expected mounts for install; aborting";
+    result = INSTALL_ERROR;
+  } else {
+    result = really_install_package(path, wipe_cache, needs_mount, &log_buffer, retry_count,
+                                    &max_temperature, ui);
+  }
+
+  // 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 = {
+    path,
+    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;
+
+  return result;
+}
+
+bool verify_package(Package* package, RecoveryUI* ui) {
+  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;
+}