| /* |
| * 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 <ctype.h> |
| #include <errno.h> |
| #include <fcntl.h> |
| #include <limits.h> |
| #include <string.h> |
| #include <sys/stat.h> |
| #include <sys/wait.h> |
| #include <unistd.h> |
| |
| #include <chrono> |
| #include <string> |
| #include <vector> |
| |
| #include <android-base/stringprintf.h> |
| #include <android-base/strings.h> |
| |
| #include "common.h" |
| #include "error_code.h" |
| #include "install.h" |
| #include "minui/minui.h" |
| #include "minzip/SysUtil.h" |
| #include "minzip/Zip.h" |
| #include "mtdutils/mounts.h" |
| #include "mtdutils/mtdutils.h" |
| #include "roots.h" |
| #include "ui.h" |
| #include "verifier.h" |
| |
| extern RecoveryUI* ui; |
| |
| #define ASSUMED_UPDATE_BINARY_NAME "META-INF/com/google/android/update-binary" |
| #define PUBLIC_KEYS_FILE "/res/keys" |
| |
| // Default allocation of progress bar segments to operations |
| static const int VERIFICATION_PROGRESS_TIME = 60; |
| static const float VERIFICATION_PROGRESS_FRACTION = 0.25; |
| static const float DEFAULT_FILES_PROGRESS_FRACTION = 0.4; |
| static const float DEFAULT_IMAGE_PROGRESS_FRACTION = 0.1; |
| |
| // If the package contains an update binary, extract it and run it. |
| static int |
| try_update_binary(const char* path, ZipArchive* zip, bool* wipe_cache, |
| std::vector<std::string>& log_buffer) |
| { |
| const ZipEntry* binary_entry = |
| mzFindZipEntry(zip, ASSUMED_UPDATE_BINARY_NAME); |
| if (binary_entry == NULL) { |
| mzCloseZipArchive(zip); |
| return INSTALL_CORRUPT; |
| } |
| |
| const char* binary = "/tmp/update_binary"; |
| unlink(binary); |
| int fd = creat(binary, 0755); |
| if (fd < 0) { |
| mzCloseZipArchive(zip); |
| LOGE("Can't make %s\n", binary); |
| return INSTALL_ERROR; |
| } |
| bool ok = mzExtractZipEntryToFile(zip, binary_entry, fd); |
| close(fd); |
| mzCloseZipArchive(zip); |
| |
| if (!ok) { |
| LOGE("Can't copy %s\n", ASSUMED_UPDATE_BINARY_NAME); |
| return INSTALL_ERROR; |
| } |
| |
| int pipefd[2]; |
| pipe(pipefd); |
| |
| // 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 program can write single-line commands: |
| // |
| // 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. |
| // |
| // firmware <"hboot"|"radio"> <filename> |
| // arrange to install the contents of <filename> in the |
| // given partition on reboot. |
| // |
| // (API v2: <filename> may start with "PACKAGE:" to |
| // indicate taking a file from the OTA package.) |
| // |
| // (API v3: this command no longer exists.) |
| // |
| // 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). |
| // |
| // - the name of the package zip file. |
| // |
| |
| const char* args[5]; |
| args[0] = binary; |
| args[1] = EXPAND(RECOVERY_API_VERSION); // defined in Android.mk |
| char temp[16]; |
| snprintf(temp, sizeof(temp), "%d", pipefd[1]); |
| args[2] = temp; |
| args[3] = path; |
| args[4] = NULL; |
| |
| pid_t pid = fork(); |
| if (pid == 0) { |
| umask(022); |
| close(pipefd[0]); |
| execv(binary, const_cast<char**>(args)); |
| fprintf(stdout, "E:Can't run %s (%s)\n", binary, strerror(errno)); |
| _exit(-1); |
| } |
| close(pipefd[1]); |
| |
| *wipe_cache = false; |
| bool retry_update = false; |
| |
| char buffer[1024]; |
| FILE* from_child = fdopen(pipefd[0], "r"); |
| while (fgets(buffer, sizeof(buffer), from_child) != NULL) { |
| char* command = strtok(buffer, " \n"); |
| if (command == NULL) { |
| continue; |
| } else if (strcmp(command, "progress") == 0) { |
| char* fraction_s = strtok(NULL, " \n"); |
| char* seconds_s = strtok(NULL, " \n"); |
| |
| float fraction = strtof(fraction_s, NULL); |
| int seconds = strtol(seconds_s, NULL, 10); |
| |
| ui->ShowProgress(fraction * (1-VERIFICATION_PROGRESS_FRACTION), seconds); |
| } else if (strcmp(command, "set_progress") == 0) { |
| char* fraction_s = strtok(NULL, " \n"); |
| float fraction = strtof(fraction_s, NULL); |
| ui->SetProgress(fraction); |
| } else if (strcmp(command, "ui_print") == 0) { |
| char* str = strtok(NULL, "\n"); |
| if (str) { |
| ui->PrintOnScreenOnly("%s", str); |
| } else { |
| ui->PrintOnScreenOnly("\n"); |
| } |
| fflush(stdout); |
| } else if (strcmp(command, "wipe_cache") == 0) { |
| *wipe_cache = true; |
| } else if (strcmp(command, "clear_display") == 0) { |
| ui->SetBackground(RecoveryUI::NONE); |
| } else if (strcmp(command, "enable_reboot") == 0) { |
| // 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 (strcmp(command, "retry_update") == 0) { |
| retry_update = true; |
| } else if (strcmp(command, "log") == 0) { |
| // Save the logging request from updater and write to |
| // last_install later. |
| log_buffer.push_back(std::string(strtok(NULL, "\n"))); |
| } else { |
| LOGE("unknown command [%s]\n", command); |
| } |
| } |
| fclose(from_child); |
| |
| int status; |
| waitpid(pid, &status, 0); |
| if (retry_update) { |
| return INSTALL_RETRY; |
| } |
| if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) { |
| LOGE("Error in %s\n(Status %d)\n", path, WEXITSTATUS(status)); |
| return INSTALL_ERROR; |
| } |
| |
| return INSTALL_SUCCESS; |
| } |
| |
| static int |
| really_install_package(const char *path, bool* wipe_cache, bool needs_mount, |
| std::vector<std::string>& log_buffer) |
| { |
| 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); |
| LOGI("Update location: %s\n", path); |
| |
| // Map the update package into memory. |
| ui->Print("Opening update package...\n"); |
| |
| if (path && needs_mount) { |
| if (path[0] == '@') { |
| ensure_path_mounted(path+1); |
| } else { |
| ensure_path_mounted(path); |
| } |
| } |
| |
| MemMapping map; |
| if (sysMapFile(path, &map) != 0) { |
| LOGE("failed to map file\n"); |
| return INSTALL_CORRUPT; |
| } |
| |
| // Load keys. |
| std::vector<Certificate> loadedKeys; |
| if (!load_keys(PUBLIC_KEYS_FILE, loadedKeys)) { |
| LOGE("Failed to load keys\n"); |
| return INSTALL_CORRUPT; |
| } |
| LOGI("%zu key(s) loaded from %s\n", loadedKeys.size(), PUBLIC_KEYS_FILE); |
| |
| // Verify package. |
| ui->Print("Verifying update package...\n"); |
| auto t0 = std::chrono::system_clock::now(); |
| int err = verify_file(map.addr, map.length, loadedKeys); |
| 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) { |
| LOGE("signature verification failed\n"); |
| log_buffer.push_back(android::base::StringPrintf("error: %d", kZipVerificationFailure)); |
| |
| sysReleaseMap(&map); |
| return INSTALL_CORRUPT; |
| } |
| |
| // Try to open the package. |
| ZipArchive zip; |
| err = mzOpenZipArchive(map.addr, map.length, &zip); |
| if (err != 0) { |
| LOGE("Can't open %s\n(%s)\n", path, err != -1 ? strerror(err) : "bad"); |
| log_buffer.push_back(android::base::StringPrintf("error: %d", kZipOpenFailure)); |
| |
| sysReleaseMap(&map); |
| return INSTALL_CORRUPT; |
| } |
| |
| // Verify and install the contents of the package. |
| ui->Print("Installing update...\n"); |
| ui->SetEnableReboot(false); |
| int result = try_update_binary(path, &zip, wipe_cache, log_buffer); |
| ui->SetEnableReboot(true); |
| ui->Print("\n"); |
| |
| sysReleaseMap(&map); |
| |
| return result; |
| } |
| |
| int |
| install_package(const char* path, bool* wipe_cache, const char* install_file, |
| bool needs_mount, int retry_count) |
| { |
| modified_flash = true; |
| auto start = std::chrono::system_clock::now(); |
| |
| FILE* install_log = fopen_path(install_file, "w"); |
| if (install_log) { |
| fputs(path, install_log); |
| fputc('\n', install_log); |
| } else { |
| LOGE("failed to open last_install: %s\n", strerror(errno)); |
| } |
| int result; |
| std::vector<std::string> log_buffer; |
| if (setup_install_mounts() != 0) { |
| LOGE("failed to set up expected mounts for install; aborting\n"); |
| result = INSTALL_ERROR; |
| } else { |
| result = really_install_package(path, wipe_cache, needs_mount, log_buffer); |
| } |
| if (install_log != nullptr) { |
| fputc(result == INSTALL_SUCCESS ? '1' : '0', install_log); |
| fputc('\n', install_log); |
| std::chrono::duration<double> duration = std::chrono::system_clock::now() - start; |
| int count = static_cast<int>(duration.count()); |
| // Report the time spent to apply OTA update in seconds. |
| fprintf(install_log, "time_total: %d\n", count); |
| fprintf(install_log, "retry: %d\n", retry_count); |
| |
| for (const auto& s : log_buffer) { |
| fprintf(install_log, "%s\n", s.c_str()); |
| } |
| |
| fclose(install_log); |
| } |
| return result; |
| } |