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The Android Open Source Projectc24a8e62009-03-03 19:28:42 -08001/*
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
Doug Zongkerb2ee9202009-06-04 10:24:53 -070017#include <ctype.h>
The Android Open Source Projectc24a8e62009-03-03 19:28:42 -080018#include <errno.h>
19#include <fcntl.h>
20#include <limits.h>
21#include <sys/stat.h>
Doug Zongkerb2ee9202009-06-04 10:24:53 -070022#include <sys/wait.h>
23#include <unistd.h>
The Android Open Source Projectc24a8e62009-03-03 19:28:42 -080024
The Android Open Source Projectc24a8e62009-03-03 19:28:42 -080025#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"
Doug Zongker28ce47c2011-10-28 10:33:05 -070035#include "ui.h"
The Android Open Source Projectc24a8e62009-03-03 19:28:42 -080036
Doug Zongker211aebc2011-10-28 15:13:10 -070037extern RecoveryUI* ui;
38
Doug Zongkerb2ee9202009-06-04 10:24:53 -070039#define ASSUMED_UPDATE_BINARY_NAME "META-INF/com/google/android/update-binary"
Doug Zongkerd1b19b92009-04-01 15:48:46 -070040#define PUBLIC_KEYS_FILE "/res/keys"
The Android Open Source Projectc24a8e62009-03-03 19:28:42 -080041
Doug Zongker211aebc2011-10-28 15:13:10 -070042// Default allocation of progress bar segments to operations
43static const int VERIFICATION_PROGRESS_TIME = 60;
44static const float VERIFICATION_PROGRESS_FRACTION = 0.25;
45static const float DEFAULT_FILES_PROGRESS_FRACTION = 0.4;
46static const float DEFAULT_IMAGE_PROGRESS_FRACTION = 0.1;
47
Doug Zongkerb2ee9202009-06-04 10:24:53 -070048// If the package contains an update binary, extract it and run it.
49static int
Doug Zongkerd0181b82011-10-19 10:51:12 -070050try_update_binary(const char *path, ZipArchive *zip, int* wipe_cache) {
Doug Zongkerb2ee9202009-06-04 10:24:53 -070051 const ZipEntry* binary_entry =
52 mzFindZipEntry(zip, ASSUMED_UPDATE_BINARY_NAME);
53 if (binary_entry == NULL) {
Doug Zongker8e5e4da2010-09-14 18:06:55 -070054 mzCloseZipArchive(zip);
Doug Zongkerb2ee9202009-06-04 10:24:53 -070055 return INSTALL_CORRUPT;
56 }
57
Doug Zongker28ce47c2011-10-28 10:33:05 -070058 const char* binary = "/tmp/update_binary";
Doug Zongkerb2ee9202009-06-04 10:24:53 -070059 unlink(binary);
60 int fd = creat(binary, 0755);
61 if (fd < 0) {
Doug Zongker8e5e4da2010-09-14 18:06:55 -070062 mzCloseZipArchive(zip);
Doug Zongkerb2ee9202009-06-04 10:24:53 -070063 LOGE("Can't make %s\n", binary);
Doug Zongkerd0181b82011-10-19 10:51:12 -070064 return INSTALL_ERROR;
Doug Zongkerb2ee9202009-06-04 10:24:53 -070065 }
66 bool ok = mzExtractZipEntryToFile(zip, binary_entry, fd);
67 close(fd);
Doug Zongker8e5e4da2010-09-14 18:06:55 -070068 mzCloseZipArchive(zip);
Doug Zongkerb2ee9202009-06-04 10:24:53 -070069
70 if (!ok) {
71 LOGE("Can't copy %s\n", ASSUMED_UPDATE_BINARY_NAME);
Doug Zongkerd0181b82011-10-19 10:51:12 -070072 return INSTALL_ERROR;
Doug Zongkerb2ee9202009-06-04 10:24:53 -070073 }
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 //
Doug Zongkerfb2e3af2009-06-17 17:29:40 -070081 // - the version number for this interface
Doug Zongkerb2ee9202009-06-04 10:24:53 -070082 //
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>
Doug Zongkerfbf3c102009-06-24 09:36:20 -070087 // 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.
Doug Zongkerb2ee9202009-06-04 10:24:53 -070096 //
97 // firmware <"hboot"|"radio"> <filename>
98 // arrange to install the contents of <filename> in the
Doug Zongkere08991e2010-02-02 13:09:52 -080099 // 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.)
Doug Zongkerb2ee9202009-06-04 10:24:53 -0700105 //
Doug Zongkerd9c9d102009-06-12 12:24:39 -0700106 // ui_print <string>
107 // display <string> on the screen.
108 //
Doug Zongkerb2ee9202009-06-04 10:24:53 -0700109 // - the name of the package zip file.
110 //
111
Doug Zongker28ce47c2011-10-28 10:33:05 -0700112 const char** args = (const char**)malloc(sizeof(char*) * 5);
Doug Zongkerb2ee9202009-06-04 10:24:53 -0700113 args[0] = binary;
Doug Zongkerfb2e3af2009-06-17 17:29:40 -0700114 args[1] = EXPAND(RECOVERY_API_VERSION); // defined in Android.mk
Doug Zongker28ce47c2011-10-28 10:33:05 -0700115 char* temp = (char*)malloc(10);
116 sprintf(temp, "%d", pipefd[1]);
117 args[2] = temp;
Doug Zongkerb2ee9202009-06-04 10:24:53 -0700118 args[3] = (char*)path;
119 args[4] = NULL;
120
121 pid_t pid = fork();
122 if (pid == 0) {
123 close(pipefd[0]);
Doug Zongker28ce47c2011-10-28 10:33:05 -0700124 execv(binary, (char* const*)args);
Doug Zongker56c51052010-07-01 09:18:44 -0700125 fprintf(stdout, "E:Can't run %s (%s)\n", binary, strerror(errno));
Doug Zongkerb2ee9202009-06-04 10:24:53 -0700126 _exit(-1);
127 }
128 close(pipefd[1]);
129
Doug Zongkerd0181b82011-10-19 10:51:12 -0700130 *wipe_cache = 0;
131
Doug Zongker64893cc2009-07-14 16:31:56 -0700132 char buffer[1024];
Doug Zongkerb2ee9202009-06-04 10:24:53 -0700133 FILE* from_child = fdopen(pipefd[0], "r");
134 while (fgets(buffer, sizeof(buffer), from_child) != NULL) {
Doug Zongkerb2ee9202009-06-04 10:24:53 -0700135 char* command = strtok(buffer, " \n");
136 if (command == NULL) {
137 continue;
138 } else if (strcmp(command, "progress") == 0) {
139 char* fraction_s = strtok(NULL, " \n");
140 char* seconds_s = strtok(NULL, " \n");
141
142 float fraction = strtof(fraction_s, NULL);
143 int seconds = strtol(seconds_s, NULL, 10);
144
Doug Zongker211aebc2011-10-28 15:13:10 -0700145 ui->ShowProgress(fraction * (1-VERIFICATION_PROGRESS_FRACTION), seconds);
Doug Zongkerfbf3c102009-06-24 09:36:20 -0700146 } else if (strcmp(command, "set_progress") == 0) {
147 char* fraction_s = strtok(NULL, " \n");
148 float fraction = strtof(fraction_s, NULL);
Doug Zongker211aebc2011-10-28 15:13:10 -0700149 ui->SetProgress(fraction);
Doug Zongkerd9c9d102009-06-12 12:24:39 -0700150 } else if (strcmp(command, "ui_print") == 0) {
151 char* str = strtok(NULL, "\n");
152 if (str) {
Doug Zongker211aebc2011-10-28 15:13:10 -0700153 ui->Print("%s", str);
Doug Zongkerd9c9d102009-06-12 12:24:39 -0700154 } else {
Doug Zongker211aebc2011-10-28 15:13:10 -0700155 ui->Print("\n");
Doug Zongkerd9c9d102009-06-12 12:24:39 -0700156 }
Doug Zongkerd0181b82011-10-19 10:51:12 -0700157 } else if (strcmp(command, "wipe_cache") == 0) {
158 *wipe_cache = 1;
Doug Zongkerb2ee9202009-06-04 10:24:53 -0700159 } else {
160 LOGE("unknown command [%s]\n", command);
161 }
162 }
163 fclose(from_child);
164
165 int status;
166 waitpid(pid, &status, 0);
167 if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) {
Doug Zongker9931f7f2009-06-10 14:11:53 -0700168 LOGE("Error in %s\n(Status %d)\n", path, WEXITSTATUS(status));
Doug Zongkerb2ee9202009-06-04 10:24:53 -0700169 return INSTALL_ERROR;
170 }
171
Doug Zongkere08991e2010-02-02 13:09:52 -0800172 return INSTALL_SUCCESS;
Doug Zongkerb2ee9202009-06-04 10:24:53 -0700173}
174
Doug Zongkerd1b19b92009-04-01 15:48:46 -0700175// Reads a file containing one or more public keys as produced by
176// DumpPublicKey: this is an RSAPublicKey struct as it would appear
177// as a C source literal, eg:
178//
179// "{64,0xc926ad21,{1795090719,...,-695002876},{-857949815,...,1175080310}}"
180//
181// (Note that the braces and commas in this example are actual
182// characters the parser expects to find in the file; the ellipses
183// indicate more numbers omitted from this example.)
184//
185// The file may contain multiple keys in this format, separated by
186// commas. The last key must not be followed by a comma.
187//
188// Returns NULL if the file failed to parse, or if it contain zero keys.
189static RSAPublicKey*
190load_keys(const char* filename, int* numKeys) {
191 RSAPublicKey* out = NULL;
192 *numKeys = 0;
193
194 FILE* f = fopen(filename, "r");
195 if (f == NULL) {
196 LOGE("opening %s: %s\n", filename, strerror(errno));
197 goto exit;
198 }
199
Doug Zongker28ce47c2011-10-28 10:33:05 -0700200 {
201 int i;
202 bool done = false;
203 while (!done) {
204 ++*numKeys;
205 out = (RSAPublicKey*)realloc(out, *numKeys * sizeof(RSAPublicKey));
206 RSAPublicKey* key = out + (*numKeys - 1);
207 if (fscanf(f, " { %i , 0x%x , { %u",
208 &(key->len), &(key->n0inv), &(key->n[0])) != 3) {
209 goto exit;
210 }
211 if (key->len != RSANUMWORDS) {
212 LOGE("key length (%d) does not match expected size\n", key->len);
213 goto exit;
214 }
215 for (i = 1; i < key->len; ++i) {
216 if (fscanf(f, " , %u", &(key->n[i])) != 1) goto exit;
217 }
218 if (fscanf(f, " } , { %u", &(key->rr[0])) != 1) goto exit;
219 for (i = 1; i < key->len; ++i) {
220 if (fscanf(f, " , %u", &(key->rr[i])) != 1) goto exit;
221 }
222 fscanf(f, " } } ");
Doug Zongkerd1b19b92009-04-01 15:48:46 -0700223
Doug Zongker28ce47c2011-10-28 10:33:05 -0700224 // if the line ends in a comma, this file has more keys.
225 switch (fgetc(f)) {
Doug Zongkerd1b19b92009-04-01 15:48:46 -0700226 case ',':
227 // more keys to come.
228 break;
229
230 case EOF:
231 done = true;
232 break;
233
234 default:
235 LOGE("unexpected character between keys\n");
236 goto exit;
Doug Zongker28ce47c2011-10-28 10:33:05 -0700237 }
Doug Zongkerd1b19b92009-04-01 15:48:46 -0700238 }
239 }
240
241 fclose(f);
242 return out;
243
244exit:
245 if (f) fclose(f);
246 free(out);
247 *numKeys = 0;
248 return NULL;
249}
250
Doug Zongker469243e2011-04-12 09:28:10 -0700251static int
Doug Zongkerd0181b82011-10-19 10:51:12 -0700252really_install_package(const char *path, int* wipe_cache)
The Android Open Source Projectc24a8e62009-03-03 19:28:42 -0800253{
Doug Zongker211aebc2011-10-28 15:13:10 -0700254 ui->SetBackground(RecoveryUI::INSTALLING);
255 ui->Print("Finding update package...\n");
256 ui->SetProgressType(RecoveryUI::INDETERMINATE);
Doug Zongkercc8cd3f2010-09-20 12:16:13 -0700257 LOGI("Update location: %s\n", path);
The Android Open Source Projectc24a8e62009-03-03 19:28:42 -0800258
Doug Zongkercc8cd3f2010-09-20 12:16:13 -0700259 if (ensure_path_mounted(path) != 0) {
260 LOGE("Can't mount %s\n", path);
The Android Open Source Projectc24a8e62009-03-03 19:28:42 -0800261 return INSTALL_CORRUPT;
262 }
263
Doug Zongker211aebc2011-10-28 15:13:10 -0700264 ui->Print("Opening update package...\n");
The Android Open Source Projectc24a8e62009-03-03 19:28:42 -0800265
Doug Zongkerd1b19b92009-04-01 15:48:46 -0700266 int numKeys;
267 RSAPublicKey* loadedKeys = load_keys(PUBLIC_KEYS_FILE, &numKeys);
268 if (loadedKeys == NULL) {
269 LOGE("Failed to load keys\n");
270 return INSTALL_CORRUPT;
271 }
272 LOGI("%d key(s) loaded from %s\n", numKeys, PUBLIC_KEYS_FILE);
273
Doug Zongker60151a22009-08-12 18:30:03 -0700274 // Give verification half the progress bar...
Doug Zongker211aebc2011-10-28 15:13:10 -0700275 ui->Print("Verifying update package...\n");
276 ui->SetProgressType(RecoveryUI::DETERMINATE);
277 ui->ShowProgress(VERIFICATION_PROGRESS_FRACTION, VERIFICATION_PROGRESS_TIME);
Doug Zongker60151a22009-08-12 18:30:03 -0700278
279 int err;
280 err = verify_file(path, loadedKeys, numKeys);
281 free(loadedKeys);
282 LOGI("verify_file returned %d\n", err);
283 if (err != VERIFY_SUCCESS) {
284 LOGE("signature verification failed\n");
285 return INSTALL_CORRUPT;
286 }
287
The Android Open Source Projectc24a8e62009-03-03 19:28:42 -0800288 /* Try to open the package.
289 */
290 ZipArchive zip;
Doug Zongker60151a22009-08-12 18:30:03 -0700291 err = mzOpenZipArchive(path, &zip);
The Android Open Source Projectc24a8e62009-03-03 19:28:42 -0800292 if (err != 0) {
293 LOGE("Can't open %s\n(%s)\n", path, err != -1 ? strerror(err) : "bad");
294 return INSTALL_CORRUPT;
295 }
296
297 /* Verify and install the contents of the package.
298 */
Doug Zongker211aebc2011-10-28 15:13:10 -0700299 ui->Print("Installing update...\n");
Doug Zongkerd0181b82011-10-19 10:51:12 -0700300 return try_update_binary(path, &zip, wipe_cache);
The Android Open Source Projectc24a8e62009-03-03 19:28:42 -0800301}
Doug Zongker469243e2011-04-12 09:28:10 -0700302
303int
Doug Zongkerd0181b82011-10-19 10:51:12 -0700304install_package(const char* path, int* wipe_cache, const char* install_file)
Doug Zongker469243e2011-04-12 09:28:10 -0700305{
Doug Zongkerd0181b82011-10-19 10:51:12 -0700306 FILE* install_log = fopen_path(install_file, "w");
Doug Zongker469243e2011-04-12 09:28:10 -0700307 if (install_log) {
308 fputs(path, install_log);
309 fputc('\n', install_log);
310 } else {
311 LOGE("failed to open last_install: %s\n", strerror(errno));
312 }
Doug Zongkerd0181b82011-10-19 10:51:12 -0700313 int result = really_install_package(path, wipe_cache);
Doug Zongker469243e2011-04-12 09:28:10 -0700314 if (install_log) {
315 fputc(result == INSTALL_SUCCESS ? '1' : '0', install_log);
316 fputc('\n', install_log);
317 fclose(install_log);
Doug Zongker469243e2011-04-12 09:28:10 -0700318 }
319 return result;
320}