install.cpp - SHIFTPHONES/android_bootable_recovery - Gitiles

 /*
  * 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 <sys/stat.h>
 #include <sys/wait.h>
 #include <unistd.h>

 #include "common.h"
 #include "install.h"
 #include "mincrypt/rsa.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 "verifier.h"
 #include "ui.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, int* wipe_cache) {
     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.
     //
     //   - the name of the package zip file.
     //

     const char** args = (const char**)malloc(sizeof(char*) * 5);
     args[0] = binary;
     args[1] = EXPAND(RECOVERY_API_VERSION);   // defined in Android.mk
     char* temp = (char*)malloc(10);
     sprintf(temp, "%d", pipefd[1]);
     args[2] = temp;
     args[3] = (char*)path;
     args[4] = NULL;

     pid_t pid = fork();
     if (pid == 0) {
         umask(022);
         close(pipefd[0]);
         execv(binary, (char* const*)args);
         fprintf(stdout, "E:Can't run %s (%s)\n", binary, strerror(errno));
         _exit(-1);
     }
     close(pipefd[1]);

     *wipe_cache = 0;

     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->Print("%s", str);
             } else {
                 ui->Print("\n");
             }
             fflush(stdout);
         } else if (strcmp(command, "wipe_cache") == 0) {
             *wipe_cache = 1;
         } 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 {
             LOGE("unknown command [%s]\n", command);
         }
     }
     fclose(from_child);

     int status;
     waitpid(pid, &status, 0);
     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, int* wipe_cache)
 {
     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) {
         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;
     }

     int numKeys;
     Certificate* loadedKeys = load_keys(PUBLIC_KEYS_FILE, &numKeys);
     if (loadedKeys == NULL) {
         LOGE("Failed to load keys\n");
         return INSTALL_CORRUPT;
     }
     LOGI("%d key(s) loaded from %s\n", numKeys, PUBLIC_KEYS_FILE);

     ui->Print("Verifying update package...\n");

     int err;
     err = verify_file(map.addr, map.length, loadedKeys, numKeys);
     free(loadedKeys);
     LOGI("verify_file returned %d\n", err);
     if (err != VERIFY_SUCCESS) {
         LOGE("signature verification failed\n");
         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");
         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);
     ui->SetEnableReboot(true);

     sysReleaseMap(&map);

     return result;
 }

 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;
     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);
     }
     if (install_log) {
         fputc(result == INSTALL_SUCCESS ? '1' : '0', install_log);
         fputc('\n', install_log);
         fclose(install_log);
     }
     return result;
 }
	/*
	* 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 <sys/stat.h>
	#include <sys/wait.h>
	#include <unistd.h>

	#include "common.h"
	#include "install.h"
	#include "mincrypt/rsa.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 "verifier.h"
	#include "ui.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, int* wipe_cache) {
	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.
	//
	// - the name of the package zip file.
	//

	const char args = (const char)malloc(sizeof(char) 5);
	args[0] = binary;
	args[1] = EXPAND(RECOVERY_API_VERSION); // defined in Android.mk
	char* temp = (char*)malloc(10);
	sprintf(temp, "%d", pipefd[1]);
	args[2] = temp;
	args[3] = (char*)path;
	args[4] = NULL;

	pid_t pid = fork();
	if (pid == 0) {
	umask(022);
	close(pipefd[0]);
	execv(binary, (char* const*)args);
	fprintf(stdout, "E:Can't run %s (%s)\n", binary, strerror(errno));
	_exit(-1);
	}
	close(pipefd[1]);

	*wipe_cache = 0;

	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->Print("%s", str);
	} else {
	ui->Print("\n");
	}
	fflush(stdout);
	} else if (strcmp(command, "wipe_cache") == 0) {
	*wipe_cache = 1;
	} 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 {
	LOGE("unknown command [%s]\n", command);
	}
	}
	fclose(from_child);

	int status;
	waitpid(pid, &status, 0);
	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, int wipe_cache)
	{
	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) {
	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;
	}

	int numKeys;
	Certificate* loadedKeys = load_keys(PUBLIC_KEYS_FILE, &numKeys);
	if (loadedKeys == NULL) {
	LOGE("Failed to load keys\n");
	return INSTALL_CORRUPT;
	}
	LOGI("%d key(s) loaded from %s\n", numKeys, PUBLIC_KEYS_FILE);

	ui->Print("Verifying update package...\n");

	int err;
	err = verify_file(map.addr, map.length, loadedKeys, numKeys);
	free(loadedKeys);
	LOGI("verify_file returned %d\n", err);
	if (err != VERIFY_SUCCESS) {
	LOGE("signature verification failed\n");
	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");
	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);
	ui->SetEnableReboot(true);

	sysReleaseMap(&map);

	return result;
	}

	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;
	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);
	}
	if (install_log) {
	fputc(result == INSTALL_SUCCESS ? '1' : '0', install_log);
	fputc('\n', install_log);
	fclose(install_log);
	}
	return result;
	}