c51f1f994a
Modify AOSP mount and wipe functions to use Partition Manager. Update wipe code to reset the log file index when wiping cache. Add ADB sideload to 540x960 theme.
331 lines
10 KiB
C++
331 lines
10 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 <string.h>
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#include <stdio.h>
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#include "common.h"
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#include "mincrypt/rsa.h"
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#include "mincrypt/sha.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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#include "ui.h"
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#include "variables.h"
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#include "data.hpp"
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#include "partitions.hpp"
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#include "twrp-functions.hpp"
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extern "C" {
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#include "extra-functions.h"
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int __system(const char *command);
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};
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extern RecoveryUI* ui;
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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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// Default allocation of progress bar segments to operations
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static const int VERIFICATION_PROGRESS_TIME = 60;
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static const float VERIFICATION_PROGRESS_FRACTION = 0.25;
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static const float DEFAULT_FILES_PROGRESS_FRACTION = 0.4;
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static const float DEFAULT_IMAGE_PROGRESS_FRACTION = 0.1;
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enum { INSTALL_SUCCESS, INSTALL_ERROR, INSTALL_CORRUPT };
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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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return INSTALL_CORRUPT;
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}
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const 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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const char** args = (const char**)malloc(sizeof(char*) * 5);
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args[0] = binary;
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args[1] = EXPAND(RECOVERY_API_VERSION); // defined in Android.mk
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char* temp = (char*)malloc(10);
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sprintf(temp, "%d", pipefd[1]);
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args[2] = temp;
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args[3] = (char*)path;
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args[4] = NULL;
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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, (char* const*)args);
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fprintf(stdout, "E: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->ShowProgress(fraction * (1-VERIFICATION_PROGRESS_FRACTION), 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->SetProgress(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 if (strcmp(command, "clear_display") == 0) {
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//ui->SetBackground(RecoveryUI::NONE);
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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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LOGE("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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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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{
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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 = (RSAPublicKey*)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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}
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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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extern "C" int TWinstall_zip(const char* path, int* wipe_cache) {
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int err, zip_verify, md5_return, md5_verify;
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ui_print("Installing '%s'...\n", path);
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if (!PartitionManager.Mount_By_Path(path, 0)) {
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LOGE("Failed to mount '%s'\n", path);
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return -1;
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}
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ui_print("Checking for MD5 file...\n");
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md5_return = TWFunc::Check_MD5(path);
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if (md5_return == 0) {
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// MD5 did not match.
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LOGE("Zip MD5 does not match.\nUnable to install zip.\n");
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return INSTALL_CORRUPT;
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} else if (md5_return == -1) {
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DataManager::GetValue(TW_FORCE_MD5_CHECK_VAR, md5_verify);
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if (md5_verify == 1) {
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// Forced MD5 checking is on and no MD5 file found.
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LOGE("No MD5 file found for '%s'.\nDisable force MD5 check to avoid this error.\n", path);
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return INSTALL_CORRUPT;
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} else
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ui_print("Skipping MD5 check: no MD5 file found.\n");
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} else if (md5_return == 1)
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ui_print("Zip MD5 matched.\n"); // MD5 found and matched.
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DataManager::GetValue(TW_SIGNED_ZIP_VERIFY_VAR, zip_verify);
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if (zip_verify) {
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ui_print("Verifying zip signature...\n");
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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 -1;
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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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ui->SetProgressType(RecoveryUI::DETERMINATE);
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ui->ShowProgress(VERIFICATION_PROGRESS_FRACTION, VERIFICATION_PROGRESS_TIME);
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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 -1;
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}
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}
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/* Try to open the package.
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*/
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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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/* Verify and install the contents of the package.
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*/
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return try_update_binary(path, &zip, wipe_cache);
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}
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