1 /* 2 * Copyright (C) 2007 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #include <ctype.h> 18 #include <errno.h> 19 #include <fcntl.h> 20 #include <limits.h> 21 #include <sys/stat.h> 22 #include <sys/wait.h> 23 #include <unistd.h> 24 25 #include "common.h" 26 #include "install.h" 27 #include "mincrypt/rsa.h" 28 #include "minui/minui.h" 29 #include "minzip/SysUtil.h" 30 #include "minzip/Zip.h" 31 #include "mtdutils/mounts.h" 32 #include "mtdutils/mtdutils.h" 33 #include "roots.h" 34 #include "verifier.h" 35 #include "ui.h" 36 37 extern RecoveryUI* ui; 38 39 #define ASSUMED_UPDATE_BINARY_NAME "META-INF/com/google/android/update-binary" 40 #define PUBLIC_KEYS_FILE "/res/keys" 41 42 // Default allocation of progress bar segments to operations 43 static const int VERIFICATION_PROGRESS_TIME = 60; 44 static const float VERIFICATION_PROGRESS_FRACTION = 0.25; 45 static const float DEFAULT_FILES_PROGRESS_FRACTION = 0.4; 46 static const float DEFAULT_IMAGE_PROGRESS_FRACTION = 0.1; 47 48 // If the package contains an update binary, extract it and run it. 49 static int 50 try_update_binary(const char *path, ZipArchive *zip, int* wipe_cache) { 51 const ZipEntry* binary_entry = 52 mzFindZipEntry(zip, ASSUMED_UPDATE_BINARY_NAME); 53 if (binary_entry == NULL) { 54 mzCloseZipArchive(zip); 55 return INSTALL_CORRUPT; 56 } 57 58 const char* binary = "/tmp/update_binary"; 59 unlink(binary); 60 int fd = creat(binary, 0755); 61 if (fd < 0) { 62 mzCloseZipArchive(zip); 63 LOGE("Can't make %s\n", binary); 64 return INSTALL_ERROR; 65 } 66 bool ok = mzExtractZipEntryToFile(zip, binary_entry, fd); 67 close(fd); 68 mzCloseZipArchive(zip); 69 70 if (!ok) { 71 LOGE("Can't copy %s\n", ASSUMED_UPDATE_BINARY_NAME); 72 return INSTALL_ERROR; 73 } 74 75 int pipefd[2]; 76 pipe(pipefd); 77 78 // When executing the update binary contained in the package, the 79 // arguments passed are: 80 // 81 // - the version number for this interface 82 // 83 // - an fd to which the program can write in order to update the 84 // progress bar. The program can write single-line commands: 85 // 86 // progress <frac> <secs> 87 // fill up the next <frac> part of of the progress bar 88 // over <secs> seconds. If <secs> is zero, use 89 // set_progress commands to manually control the 90 // progress of this segment of the bar 91 // 92 // set_progress <frac> 93 // <frac> should be between 0.0 and 1.0; sets the 94 // progress bar within the segment defined by the most 95 // recent progress command. 96 // 97 // firmware <"hboot"|"radio"> <filename> 98 // arrange to install the contents of <filename> in the 99 // given partition on reboot. 100 // 101 // (API v2: <filename> may start with "PACKAGE:" to 102 // indicate taking a file from the OTA package.) 103 // 104 // (API v3: this command no longer exists.) 105 // 106 // ui_print <string> 107 // display <string> on the screen. 108 // 109 // - the name of the package zip file. 110 // 111 112 const char** args = (const char**)malloc(sizeof(char*) * 5); 113 args[0] = binary; 114 args[1] = EXPAND(RECOVERY_API_VERSION); // defined in Android.mk 115 char* temp = (char*)malloc(10); 116 sprintf(temp, "%d", pipefd[1]); 117 args[2] = temp; 118 args[3] = (char*)path; 119 args[4] = NULL; 120 121 pid_t pid = fork(); 122 if (pid == 0) { 123 umask(022); 124 close(pipefd[0]); 125 execv(binary, (char* const*)args); 126 fprintf(stdout, "E:Can't run %s (%s)\n", binary, strerror(errno)); 127 _exit(-1); 128 } 129 close(pipefd[1]); 130 131 *wipe_cache = 0; 132 133 char buffer[1024]; 134 FILE* from_child = fdopen(pipefd[0], "r"); 135 while (fgets(buffer, sizeof(buffer), from_child) != NULL) { 136 char* command = strtok(buffer, " \n"); 137 if (command == NULL) { 138 continue; 139 } else if (strcmp(command, "progress") == 0) { 140 char* fraction_s = strtok(NULL, " \n"); 141 char* seconds_s = strtok(NULL, " \n"); 142 143 float fraction = strtof(fraction_s, NULL); 144 int seconds = strtol(seconds_s, NULL, 10); 145 146 ui->ShowProgress(fraction * (1-VERIFICATION_PROGRESS_FRACTION), seconds); 147 } else if (strcmp(command, "set_progress") == 0) { 148 char* fraction_s = strtok(NULL, " \n"); 149 float fraction = strtof(fraction_s, NULL); 150 ui->SetProgress(fraction); 151 } else if (strcmp(command, "ui_print") == 0) { 152 char* str = strtok(NULL, "\n"); 153 if (str) { 154 ui->Print("%s", str); 155 } else { 156 ui->Print("\n"); 157 } 158 fflush(stdout); 159 } else if (strcmp(command, "wipe_cache") == 0) { 160 *wipe_cache = 1; 161 } else if (strcmp(command, "clear_display") == 0) { 162 ui->SetBackground(RecoveryUI::NONE); 163 } else if (strcmp(command, "enable_reboot") == 0) { 164 // packages can explicitly request that they want the user 165 // to be able to reboot during installation (useful for 166 // debugging packages that don't exit). 167 ui->SetEnableReboot(true); 168 } else { 169 LOGE("unknown command [%s]\n", command); 170 } 171 } 172 fclose(from_child); 173 174 int status; 175 waitpid(pid, &status, 0); 176 if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) { 177 LOGE("Error in %s\n(Status %d)\n", path, WEXITSTATUS(status)); 178 return INSTALL_ERROR; 179 } 180 181 return INSTALL_SUCCESS; 182 } 183 184 static int 185 really_install_package(const char *path, int* wipe_cache, bool needs_mount) 186 { 187 ui->SetBackground(RecoveryUI::INSTALLING_UPDATE); 188 ui->Print("Finding update package...\n"); 189 // Give verification half the progress bar... 190 ui->SetProgressType(RecoveryUI::DETERMINATE); 191 ui->ShowProgress(VERIFICATION_PROGRESS_FRACTION, VERIFICATION_PROGRESS_TIME); 192 LOGI("Update location: %s\n", path); 193 194 // Map the update package into memory. 195 ui->Print("Opening update package...\n"); 196 197 if (path && needs_mount) { 198 if (path[0] == '@') { 199 ensure_path_mounted(path+1); 200 } else { 201 ensure_path_mounted(path); 202 } 203 } 204 205 MemMapping map; 206 if (sysMapFile(path, &map) != 0) { 207 LOGE("failed to map file\n"); 208 return INSTALL_CORRUPT; 209 } 210 211 int numKeys; 212 Certificate* loadedKeys = load_keys(PUBLIC_KEYS_FILE, &numKeys); 213 if (loadedKeys == NULL) { 214 LOGE("Failed to load keys\n"); 215 return INSTALL_CORRUPT; 216 } 217 LOGI("%d key(s) loaded from %s\n", numKeys, PUBLIC_KEYS_FILE); 218 219 ui->Print("Verifying update package...\n"); 220 221 int err; 222 err = verify_file(map.addr, map.length, loadedKeys, numKeys); 223 free(loadedKeys); 224 LOGI("verify_file returned %d\n", err); 225 if (err != VERIFY_SUCCESS) { 226 LOGE("signature verification failed\n"); 227 sysReleaseMap(&map); 228 return INSTALL_CORRUPT; 229 } 230 231 /* Try to open the package. 232 */ 233 ZipArchive zip; 234 err = mzOpenZipArchive(map.addr, map.length, &zip); 235 if (err != 0) { 236 LOGE("Can't open %s\n(%s)\n", path, err != -1 ? strerror(err) : "bad"); 237 sysReleaseMap(&map); 238 return INSTALL_CORRUPT; 239 } 240 241 /* Verify and install the contents of the package. 242 */ 243 ui->Print("Installing update...\n"); 244 ui->SetEnableReboot(false); 245 int result = try_update_binary(path, &zip, wipe_cache); 246 ui->SetEnableReboot(true); 247 ui->Print("\n"); 248 249 sysReleaseMap(&map); 250 251 return result; 252 } 253 254 int 255 install_package(const char* path, int* wipe_cache, const char* install_file, 256 bool needs_mount) 257 { 258 FILE* install_log = fopen_path(install_file, "w"); 259 if (install_log) { 260 fputs(path, install_log); 261 fputc('\n', install_log); 262 } else { 263 LOGE("failed to open last_install: %s\n", strerror(errno)); 264 } 265 int result; 266 if (setup_install_mounts() != 0) { 267 LOGE("failed to set up expected mounts for install; aborting\n"); 268 result = INSTALL_ERROR; 269 } else { 270 result = really_install_package(path, wipe_cache, needs_mount); 271 } 272 if (install_log) { 273 fputc(result == INSTALL_SUCCESS ? '1' : '0', install_log); 274 fputc('\n', install_log); 275 fclose(install_log); 276 } 277 return result; 278 } 279
