529 lines
16 KiB
C
529 lines
16 KiB
C
/*
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* Copyright (C) 2007 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <ctype.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <limits.h>
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#include <sys/stat.h>
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#include <sys/wait.h>
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#include <unistd.h>
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#include "common.h"
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#include "install.h"
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#include "mincrypt/rsa.h"
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#include "minui/minui.h"
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#include "minzip/SysUtil.h"
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#include "minzip/Zip.h"
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#include "mtdutils/mounts.h"
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#include "mtdutils/mtdutils.h"
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#include "roots.h"
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#include "verifier.h"
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#define ASSUMED_UPDATE_BINARY_NAME "META-INF/com/google/android/update-binary"
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#define PUBLIC_KEYS_FILE "/res/keys"
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// Flash dsp*.mbn files included in the zip
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/* [yangjihong] Update dsp image */
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#define MAX_DSP_MBN_IMAGES 4
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#define WLAN_MODEM_ZIP_PATH "firmware"
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#define WLAN_MODEM_DEST_PATH "/firmware"
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#define WLAN_MODEM_INFO_FILE "firmware/image/update_info"
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#define TMP_WLAN_MODEM_INFO_FILE "/firmware/image/update_info"
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#define MODEM_ENTRY_MAX_LINE_LEN 64
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// Callback invoked by mzProcessZipEntryContents to write uncompressed data to flash
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static bool flash_mbn_data(const unsigned char *data, int dataLen, void *cookie) {
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ssize_t ret;
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MtdWriteContext *ctx = (MtdWriteContext *) cookie;
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if (cookie == NULL) {
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LOGI("unexpected null ptr\n");
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return false;
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}
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ret = mtd_write_data(ctx, data, dataLen);
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if (ret != dataLen) {
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LOGI("error writing buffer: return value %d, expected %d\n", ret, dataLen);
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return false;
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}
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return true;
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}
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static bool update_wlan_modem(const ZipArchive *zip)
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{
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char* zip_path;
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char* dest_path;
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const ZipEntry *info_entry;
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char line[MODEM_ENTRY_MAX_LINE_LEN];
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int i;
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info_entry = mzFindZipEntry(zip, WLAN_MODEM_INFO_FILE);
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if (info_entry == NULL)
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{
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LOGI("None wlan & modem imags found!\n");
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return true;
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}
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// To create a consistent system image, never use the clock for timestamps.
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struct utimbuf timestamp = { 1217592000, 1217592000 }; // 8/1/2008 default
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// extract images to firmware dir
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bool success = mzExtractRecursive(zip, WLAN_MODEM_ZIP_PATH, WLAN_MODEM_DEST_PATH,
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MZ_EXTRACT_FILES_ONLY, ×tamp,
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NULL, NULL);
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FILE* file = fopen(TMP_WLAN_MODEM_INFO_FILE, "r");
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if (file == NULL) {
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LOGI("Can't open %s, do default set permission\n", TMP_WLAN_MODEM_INFO_FILE);
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system("chmod /firmware/image/* 664");
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system("chmod /firmware/image/*.bin 775");
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system("chmod /firmware/image/*.tlv 775");
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system("chmod /firmware/image/*.txt 775");
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return true;
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}
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memset(line, 0, MODEM_ENTRY_MAX_LINE_LEN);
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while(fgets(line, MODEM_ENTRY_MAX_LINE_LEN - 1, file)!=NULL)
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{
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for (i = 0; line[i] && isspace(line[i]); ++i);
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if (line[i] == '\0' || line[i] == '#') continue;
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char* original = strdup(line);
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char* image = strtok(line+i, " \t\n");
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char* image_mode = strtok(NULL, " \t\n");
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char* mode_end;
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if (image && image_mode) {
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int mode = strtoul(image_mode, &mode_end, 0);
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if (*mode_end != '\0' || image_mode[0] == 0) {
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LOGI("Unknown permission: %s\n", original);
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continue;
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}
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if (chmod(image, mode) < 0) {
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LOGI("%s: chmod to %o failed: %s\n", image, mode, strerror(errno));
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}else {
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LOGI("Set permission: file %s (mode:%o)\n", image, mode);
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}
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}else {
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LOGI("skipping line: %s\n", original);
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}
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free(original);
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memset(line, 0, MODEM_ENTRY_MAX_LINE_LEN);
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}
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fclose(file);
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unlink(TMP_WLAN_MODEM_INFO_FILE);
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return success;
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}
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static bool install_mbns(const ZipArchive *zip)
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{
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int i;
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const char *mbn_names[MAX_DSP_MBN_IMAGES] =
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{
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"sbl1.mbn",
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"appsboot.mbn",
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"NON-HLOS.ubi",
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"boot.img"
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};
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const char *mbn_partitions[MAX_DSP_MBN_IMAGES] =
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{"sbl", "aboot", "modem", "boot"};
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const ZipEntry *mbn_entry;
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const MtdPartition *part;
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size_t total_size, erase_size, write_size;
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MtdWriteContext *ctx;
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if (mtd_scan_partitions() < 0) {
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LOGI("error scanning mtd partitions\n");
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return false;
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}
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for (i = 0; i < MAX_DSP_MBN_IMAGES; i++)
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{
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mbn_entry = mzFindZipEntry(zip, mbn_names[i]);
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if (mbn_entry != NULL)
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{
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LOGI("found full mbn %s\n", mbn_names[i]);
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part = mtd_find_partition_by_name(mbn_partitions[i]);
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if (part == NULL) {
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LOGI("couldn't find partition %s\n", mbn_partitions[i]);
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return false;
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}
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if (mtd_partition_info(part, &total_size, &erase_size, &write_size) < 0) {
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LOGI("couldn't get partition info for %s\n", mbn_partitions[i]);
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return false;
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}
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if (total_size < mbn_entry->uncompLen) {
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LOGI("not enough room in partition %s for file of size %d "
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"(have %d bytes)!\n", mbn_partitions[i], total_size,
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mbn_entry->uncompLen);
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return false;
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}
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ctx = mtd_write_partition(part);
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if (ctx == NULL) {
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LOGI("couldn't open write context for %s\n", mbn_partitions[i]);
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return false;
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}
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if (!mzProcessZipEntryContents(zip, mbn_entry, flash_mbn_data, ctx)) {
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LOGI("error writing image\n");
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(void) mtd_write_close(ctx);
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return false;
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}
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if (mtd_erase_blocks(ctx, -1) < 0) {
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LOGI("error finishing mtd write\n");
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mtd_write_close(ctx);
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return false;
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}
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if (mtd_write_close(ctx) < 0) {
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LOGI("error closing write context");
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return false;
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}
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LOGI("updating %s complete: wrote %d bytes\n",
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mbn_partitions[i], mbn_entry->uncompLen);
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}
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else
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{
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LOGI("No mbn %s image found\n", mbn_names[i]);
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}
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}
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return true;
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}
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// If the package contains an update binary, extract it and run it.
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static int
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try_update_binary(const char *path, ZipArchive *zip, int* wipe_cache) {
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const ZipEntry* binary_entry =
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mzFindZipEntry(zip, ASSUMED_UPDATE_BINARY_NAME);
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if (binary_entry == NULL) {
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mzCloseZipArchive(zip);
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LOGE("File corrupted %s; can't find %s\n", path, ASSUMED_UPDATE_BINARY_NAME);
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return INSTALL_CORRUPT;
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}
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char* binary = "/tmp/update_binary";
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unlink(binary);
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int fd = creat(binary, 0755);
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if (fd < 0) {
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mzCloseZipArchive(zip);
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LOGE("Can't make %s\n", binary);
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return INSTALL_ERROR;
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}
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bool ok = mzExtractZipEntryToFile(zip, binary_entry, fd);
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close(fd);
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//mzCloseZipArchive(zip);
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if (!ok) {
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LOGE("Can't copy %s\n", ASSUMED_UPDATE_BINARY_NAME);
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return INSTALL_ERROR;
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}
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int pipefd[2];
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pipe(pipefd);
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// When executing the update binary contained in the package, the
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// arguments passed are:
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//
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// - the version number for this interface
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//
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// - an fd to which the program can write in order to update the
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// progress bar. The program can write single-line commands:
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//
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// progress <frac> <secs>
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// fill up the next <frac> part of of the progress bar
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// over <secs> seconds. If <secs> is zero, use
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// set_progress commands to manually control the
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// progress of this segment of the bar
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//
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// set_progress <frac>
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// <frac> should be between 0.0 and 1.0; sets the
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// progress bar within the segment defined by the most
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// recent progress command.
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//
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// firmware <"hboot"|"radio"> <filename>
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// arrange to install the contents of <filename> in the
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// given partition on reboot.
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//
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// (API v2: <filename> may start with "PACKAGE:" to
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// indicate taking a file from the OTA package.)
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//
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// (API v3: this command no longer exists.)
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//
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// ui_print <string>
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// display <string> on the screen.
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//
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// - the name of the package zip file.
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//
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char *recovery_version = "3";
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char** args = malloc(sizeof(char*) * 5);
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args[0] = binary;
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args[1] = recovery_version; // defined in Android.mk
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args[2] = malloc(10);
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sprintf(args[2], "%d", pipefd[1]);
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args[3] = (char*)path;
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args[4] = NULL;
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LOGI("Attempting to run %s\n", binary);
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pid_t pid = fork();
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if (pid == 0) {
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close(pipefd[0]);
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execv(binary, args);
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fprintf(stdout, "E:Can't run %s (%s)\n", binary, strerror(errno));
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LOGE("Can't run %s (%s)\n", binary, strerror(errno));
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_exit(-1);
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}
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close(pipefd[1]);
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*wipe_cache = 0;
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char buffer[1024];
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FILE* from_child = fdopen(pipefd[0], "r");
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while (fgets(buffer, sizeof(buffer), from_child) != NULL) {
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char* command = strtok(buffer, " \n");
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if (command == NULL) {
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continue;
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} else if (strcmp(command, "progress") == 0) {
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char* fraction_s = strtok(NULL, " \n");
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char* seconds_s = strtok(NULL, " \n");
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float fraction = strtof(fraction_s, NULL);
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int seconds = strtol(seconds_s, NULL, 10);
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ui_show_progress(fraction * (1-VERIFICATION_PROGRESS_FRACTION),
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seconds);
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} else if (strcmp(command, "set_progress") == 0) {
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char* fraction_s = strtok(NULL, " \n");
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float fraction = strtof(fraction_s, NULL);
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ui_set_progress(fraction);
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} else if (strcmp(command, "ui_print") == 0) {
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char* str = strtok(NULL, "\n");
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if (str) {
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ui_print("%s", str);
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} else {
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ui_print("\n");
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}
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} else if (strcmp(command, "wipe_cache") == 0) {
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*wipe_cache = 1;
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} else {
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LOGE("unknown command [%s]\n", command);
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}
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}
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fclose(from_child);
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int status;
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waitpid(pid, &status, 0);
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if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) {
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LOGI("Error in %s\n(Status %d)\n", path, WEXITSTATUS(status));
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return INSTALL_ERROR;
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}
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if (!install_mbns(zip)) {
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LOGI("Installing MBNs failed\n");
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mzCloseZipArchive(zip);
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return INSTALL_ERROR;
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}
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else {
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LOGI("Installing MBNs success\n");
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}
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#if 0
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if (!update_wlan_modem(zip)) {
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LOGI("Update wlan & modem failed\n");
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mzCloseZipArchive(zip);
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return INSTALL_ERROR;
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}
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else {
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LOGI("Update wlan & modem success\n");
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}
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#endif
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mzCloseZipArchive(zip);
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return INSTALL_SUCCESS;
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}
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// Reads a file containing one or more public keys as produced by
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// DumpPublicKey: this is an RSAPublicKey struct as it would appear
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// as a C source literal, eg:
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//
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// "{64,0xc926ad21,{1795090719,...,-695002876},{-857949815,...,1175080310}}"
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//
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// (Note that the braces and commas in this example are actual
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// characters the parser expects to find in the file; the ellipses
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// indicate more numbers omitted from this example.)
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//
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// The file may contain multiple keys in this format, separated by
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// commas. The last key must not be followed by a comma.
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//
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// Returns NULL if the file failed to parse, or if it contain zero keys.
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static RSAPublicKey*
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load_keys(const char* filename, int* numKeys) {
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RSAPublicKey* out = NULL;
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*numKeys = 0;
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FILE* f = fopen(filename, "r");
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if (f == NULL) {
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LOGE("opening %s: %s\n", filename, strerror(errno));
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goto exit;
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}
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int i;
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bool done = false;
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while (!done) {
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++*numKeys;
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out = realloc(out, *numKeys * sizeof(RSAPublicKey));
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RSAPublicKey* key = out + (*numKeys - 1);
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if (fscanf(f, " { %i , 0x%x , { %u",
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&(key->len), &(key->n0inv), &(key->n[0])) != 3) {
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goto exit;
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}
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if (key->len != RSANUMWORDS) {
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LOGE("key length (%d) does not match expected size\n", key->len);
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goto exit;
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}
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for (i = 1; i < key->len; ++i) {
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if (fscanf(f, " , %u", &(key->n[i])) != 1) goto exit;
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}
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if (fscanf(f, " } , { %u", &(key->rr[0])) != 1) goto exit;
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for (i = 1; i < key->len; ++i) {
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if (fscanf(f, " , %u", &(key->rr[i])) != 1) goto exit;
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}
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fscanf(f, " } } ");
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// if the line ends in a comma, this file has more keys.
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switch (fgetc(f)) {
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case ',':
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// more keys to come.
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break;
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case EOF:
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done = true;
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break;
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default:
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LOGE("unexpected character between keys\n");
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goto exit;
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}
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}
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fclose(f);
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return out;
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exit:
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if (f) fclose(f);
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free(out);
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*numKeys = 0;
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return NULL;
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}
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static int
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really_install_package(const char *path, int* wipe_cache)
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{
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ui_set_background(BACKGROUND_ICON_INSTALLING);
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ui_print("Finding update package...\n");
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ui_show_indeterminate_progress();
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LOGI("Update location: %s\n", path);
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if (ensure_path_mounted(path) != 0) {
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LOGE("Can't mount %s\n", path);
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return INSTALL_CORRUPT;
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}
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ui_print("Opening update package...\n");
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#if ENABLE_SIGNATURE_CHECK
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int numKeys;
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RSAPublicKey* loadedKeys = load_keys(PUBLIC_KEYS_FILE, &numKeys);
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if (loadedKeys == NULL) {
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LOGE("Failed to load keys\n");
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return INSTALL_CORRUPT;
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}
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LOGI("%d key(s) loaded from %s\n", numKeys, PUBLIC_KEYS_FILE);
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// Give verification half the progress bar...
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ui_print("Verifying update package...\n");
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LOGI("Verifying update package...\n");
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ui_show_progress(
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VERIFICATION_PROGRESS_FRACTION,
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VERIFICATION_PROGRESS_TIME);
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int err;
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err = verify_file(path, loadedKeys, numKeys);
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free(loadedKeys);
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LOGI("verify_file returned %d\n", err);
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if (err != VERIFY_SUCCESS) {
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LOGE("signature verification failed\n");
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return INSTALL_CORRUPT;
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}
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#endif
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/* Try to open the package.
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*/
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int err;
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ZipArchive zip;
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err = mzOpenZipArchive(path, &zip);
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if (err != 0) {
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LOGE("Can't open %s\n(%s)\n", path, err != -1 ? strerror(err) : "bad");
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return INSTALL_CORRUPT;
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}
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/*Do CRC check for files in zip package
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*/
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int zip_file_count;
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LOGI( "number of files in zip is %d \n",zip.numEntries);
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for(zip_file_count = 0; zip_file_count < zip.numEntries; zip_file_count++)
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{
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//LOGI("verifying file at index %d\n",zip_file_count);
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if(!mzIsZipEntryIntact(&zip, &zip.pEntries[zip_file_count])){
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LOGI("Zip archive corrupt at entry %d\n",zip_file_count);
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return INSTALL_CORRUPT;
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}
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|
}
|
|
/* Verify and install the contents of the package.
|
|
*/
|
|
ui_print("Installing update...\n");
|
|
LOGI("Installing update...\n");
|
|
return try_update_binary(path, &zip, wipe_cache);
|
|
}
|
|
|
|
int
|
|
install_package(const char* path, int* wipe_cache, const char* install_file)
|
|
{
|
|
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 = really_install_package(path, wipe_cache);
|
|
if (install_log) {
|
|
fputc(result == INSTALL_SUCCESS ? '1' : '0', install_log);
|
|
fputc('\n', install_log);
|
|
fclose(install_log);
|
|
}
|
|
return result;
|
|
}
|