Initial tool for OBB manipulation (6e7ac5f0) · Commits · e / os / android_frameworks_base

include/utils/ObbFile.h

+4 −0

Original line number	Diff line number	Diff line
		@@ -35,6 +35,8 @@ public:
		bool readFrom(int fd);
		bool writeTo(const char* filename);
		bool writeTo(int fd);
		bool removeFrom(const char* filename);
		bool removeFrom(int fd);

		const char* getFileName() const {
		return mFileName;
		@@ -78,6 +80,8 @@ private:

		size_t mFileSize;

		size_t mFooterStart;

		unsigned char* mReadBuf;

		bool parseObbFile(int fd);

libs/utils/ObbFile.cpp

+39 −3

Original line number	Diff line number	Diff line
		@@ -156,9 +156,9 @@ bool ObbFile::parseObbFile(int fd)
		return false;
		}

		if (footerSize < kFooterMinSize) {
		LOGW("claimed footer size is too small (%08zx; minimum size is 0x%x)\n",
		footerSize, kFooterMinSize);
		if (footerSize < (kFooterMinSize - kFooterTagSize)) {
		LOGW("claimed footer size is too small (0x%zx; minimum size is 0x%x)\n",
		footerSize, kFooterMinSize - kFooterTagSize);
		return false;
		}
		}
		@@ -169,6 +169,8 @@ bool ObbFile::parseObbFile(int fd)
		return false;
		}

		mFooterStart = fileOffset;

		char* scanBuf = (char*)malloc(footerSize);
		if (scanBuf == NULL) {
		LOGW("couldn't allocate scanBuf: %s\n", strerror(errno));
		@@ -293,4 +295,38 @@ bool ObbFile::writeTo(int fd)
		return true;
		}

		bool ObbFile::removeFrom(const char* filename)
		{
		int fd;
		bool success = false;

		fd = ::open(filename, O_RDWR);
		if (fd < 0) {
		goto out;
		}
		success = removeFrom(fd);
		close(fd);

		out:
		if (!success) {
		LOGW("failed to remove signature from %s: %s\n", filename, strerror(errno));
		}
		return success;
		}

		bool ObbFile::removeFrom(int fd)
		{
		if (fd < 0) {
		return false;
		}

		if (!readFrom(fd)) {
		return false;
		}

		ftruncate(fd, mFooterStart);

		return true;
		}

		}

tools/obbtool/Android.mk

0 → 100644

+30 −0

Original line number	Diff line number	Diff line
		#
		# Copyright 2010 The Android Open Source Project
		#
		# Opaque Binary Blob (OBB) Tool
		#

		# This tool is prebuilt if we're doing an app-only build.
		ifeq ($(TARGET_BUILD_APPS),)

		LOCAL_PATH:= $(call my-dir)
		include $(CLEAR_VARS)

		LOCAL_SRC_FILES := \
		Main.cpp

		#LOCAL_C_INCLUDES +=

		LOCAL_STATIC_LIBRARIES := \
		libutils \
		libcutils

		ifeq ($(HOST_OS),linux)
		LOCAL_LDLIBS += -lpthread
		endif

		LOCAL_MODULE := obbtool

		include $(BUILD_HOST_EXECUTABLE)

		endif # TARGET_BUILD_APPS

tools/obbtool/Main.cpp

0 → 100644

+225 −0

Original line number	Diff line number	Diff line
		/*
		* Copyright (C) 2010 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 <utils/ObbFile.h>
		#include <utils/String8.h>

		#include <getopt.h>
		#include <stdio.h>
		#include <stdlib.h>

		using namespace android;

		static const char* gProgName = "obbtool";
		static const char* gProgVersion = "1.0";

		static int wantUsage = 0;
		static int wantVersion = 0;

		#define ADD_OPTS "n:v:f:c:"
		static const struct option longopts[] = {
		{"help", no_argument, &wantUsage, 1},
		{"version", no_argument, &wantVersion, 1},

		/* Args for "add" */
		{"name", required_argument, NULL, 'n'},
		{"version", required_argument, NULL, 'v'},
		{"filesystem", required_argument, NULL, 'f'},
		{"crypto", required_argument, NULL, 'c'},

		{NULL, 0, NULL, '\0'}
		};

		struct package_info_t {
		char* packageName;
		int packageVersion;
		char* filesystem;
		char* crypto;
		};

		/*
		* Print usage info.
		*/
		void usage(void)
		{
		fprintf(stderr, "Opaque Binary Blob (OBB) Tool\n\n");
		fprintf(stderr, "Usage:\n");
		fprintf(stderr,
		" %s a[dd] [ OPTIONS ] FILENAME\n"
		" Adds an OBB signature to the file.\n\n", gProgName);
		fprintf(stderr,
		" %s r[emove] FILENAME\n"
		" Removes the OBB signature from the file.\n\n", gProgName);
		fprintf(stderr,
		" %s i[nfo] FILENAME\n"
		" Prints the OBB signature information of a file.\n\n", gProgName);
		}

		void doAdd(const char* filename, struct package_info_t* info) {
		ObbFile *obb = new ObbFile();
		if (obb->readFrom(filename)) {
		fprintf(stderr, "ERROR: %s: OBB signature already present\n", filename);
		return;
		}

		obb->setPackageName(String8(info->packageName));
		obb->setVersion(info->packageVersion);

		if (!obb->writeTo(filename)) {
		fprintf(stderr, "ERROR: %s: couldn't write OBB signature: %s\n",
		filename, strerror(errno));
		return;
		}

		fprintf(stderr, "OBB signature successfully written\n");
		}

		void doRemove(const char* filename) {
		ObbFile *obb = new ObbFile();
		if (!obb->readFrom(filename)) {
		fprintf(stderr, "ERROR: %s: no OBB signature present\n", filename);
		return;
		}

		if (!obb->removeFrom(filename)) {
		fprintf(stderr, "ERROR: %s: couldn't remove OBB signature\n", filename);
		return;
		}

		fprintf(stderr, "OBB signature successfully removed\n");
		}

		void doInfo(const char* filename) {
		ObbFile *obb = new ObbFile();
		if (!obb->readFrom(filename)) {
		fprintf(stderr, "ERROR: %s: couldn't read OBB signature\n", filename);
		return;
		}

		printf("OBB info for '%s':\n", filename);
		printf("Package name: %s\n", obb->getPackageName().string());
		printf(" Version: %d\n", obb->getVersion());
		}

		/*
		* Parse args.
		*/
		int main(int argc, char* const argv[])
		{
		const char *prog = argv[0];
		struct options *options;
		int opt;
		int option_index = 0;
		struct package_info_t package_info;

		int result = 1; // pessimistically assume an error.

		if (argc < 2) {
		wantUsage = 1;
		goto bail;
		}

		while ((opt = getopt_long(argc, argv, ADD_OPTS, longopts, &option_index)) != -1) {
		switch (opt) {
		case 0:
		if (longopts[option_index].flag)
		break;
		fprintf(stderr, "'%s' requires an argument\n", longopts[option_index].name);
		wantUsage = 1;
		goto bail;
		case 'n':
		package_info.packageName = optarg;
		break;
		case 'v':
		char *end;
		package_info.packageVersion = strtol(optarg, &end, 10);
		if (optarg == '\0' \|\| end != '\0') {
		fprintf(stderr, "ERROR: invalid version; should be integer!\n\n");
		wantUsage = 1;
		goto bail;
		}
		break;
		case 'f':
		package_info.filesystem = optarg;
		break;
		case 'c':
		package_info.crypto = optarg;
		break;
		case '?':
		wantUsage = 1;
		goto bail;
		}
		}

		if (wantVersion) {
		fprintf(stderr, "%s %s\n", gProgName, gProgVersion);
		}

		if (wantUsage) {
		goto bail;
		}

		#define CHECK_OP(name) \
		if (strncmp(op, name, opsize)) { \
		fprintf(stderr, "ERROR: unknown function '%s'!\n\n", op); \
		wantUsage = 1; \
		goto bail; \
		}

		if (optind < argc) {
		const char* op = argv[optind++];
		const int opsize = strlen(op);

		if (optind >= argc) {
		fprintf(stderr, "ERROR: filename required!\n\n");
		wantUsage = 1;
		goto bail;
		}

		const char* filename = argv[optind++];

		switch (op[0]) {
		case 'a':
		CHECK_OP("add");
		if (package_info.packageName == NULL) {
		fprintf(stderr, "ERROR: arguments required 'packageName' and 'version'\n");
		goto bail;
		}
		doAdd(filename, &package_info);
		break;
		case 'r':
		CHECK_OP("remove");
		doRemove(filename);
		break;
		case 'i':
		CHECK_OP("info");
		doInfo(filename);
		break;
		default:
		fprintf(stderr, "ERROR: unknown command '%s'!\n\n", op);
		wantUsage = 1;
		goto bail;
		}
		}

		bail:
		if (wantUsage) {
		usage();
		result = 2;
		}

		return result;
		}