| /* |
| * Copyright (C) 2011 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. |
| */ |
| |
| #define LOG_TAG "NativeLibraryHelper" |
| //#define LOG_NDEBUG 0 |
| |
| #include <android_runtime/AndroidRuntime.h> |
| |
| #include <ScopedUtfChars.h> |
| #include <UniquePtr.h> |
| #include <androidfw/ZipFileRO.h> |
| #include <androidfw/ZipUtils.h> |
| #include <utils/Log.h> |
| #include <utils/Vector.h> |
| |
| #include <zlib.h> |
| |
| #include <fcntl.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <time.h> |
| #include <unistd.h> |
| #include <sys/stat.h> |
| #include <sys/types.h> |
| |
| |
| #define APK_LIB "lib/" |
| #define APK_LIB_LEN (sizeof(APK_LIB) - 1) |
| |
| #define LIB_PREFIX "/lib" |
| #define LIB_PREFIX_LEN (sizeof(LIB_PREFIX) - 1) |
| |
| #define LIB_SUFFIX ".so" |
| #define LIB_SUFFIX_LEN (sizeof(LIB_SUFFIX) - 1) |
| |
| #define RS_BITCODE_SUFFIX ".bc" |
| #define RS_BITCODE_SUFFIX_LEN (sizeof(RS_BITCODE_SUFFIX) -1) |
| |
| #define GDBSERVER "gdbserver" |
| #define GDBSERVER_LEN (sizeof(GDBSERVER) - 1) |
| |
| #define TMP_FILE_PATTERN "/tmp.XXXXXX" |
| #define TMP_FILE_PATTERN_LEN (sizeof(TMP_FILE_PATTERN) - 1) |
| |
| namespace android { |
| |
| // These match PackageManager.java install codes |
| enum install_status_t { |
| INSTALL_SUCCEEDED = 1, |
| INSTALL_FAILED_INVALID_APK = -2, |
| INSTALL_FAILED_INSUFFICIENT_STORAGE = -4, |
| INSTALL_FAILED_CONTAINER_ERROR = -18, |
| INSTALL_FAILED_INTERNAL_ERROR = -110, |
| INSTALL_FAILED_NO_MATCHING_ABIS = -113, |
| NO_NATIVE_LIBRARIES = -114 |
| }; |
| |
| typedef install_status_t (*iterFunc)(JNIEnv*, void*, ZipFileRO*, ZipEntryRO, const char*); |
| |
| // Equivalent to android.os.FileUtils.isFilenameSafe |
| static bool |
| isFilenameSafe(const char* filename) |
| { |
| off_t offset = 0; |
| for (;;) { |
| switch (*(filename + offset)) { |
| case 0: |
| // Null. |
| // If we've reached the end, all the other characters are good. |
| return true; |
| |
| case 'A' ... 'Z': |
| case 'a' ... 'z': |
| case '0' ... '9': |
| case '+': |
| case ',': |
| case '-': |
| case '.': |
| case '/': |
| case '=': |
| case '_': |
| offset++; |
| break; |
| |
| default: |
| // We found something that is not good. |
| return false; |
| } |
| } |
| // Should not reach here. |
| } |
| |
| static bool |
| isFileDifferent(const char* filePath, size_t fileSize, time_t modifiedTime, |
| long zipCrc, struct stat64* st) |
| { |
| if (lstat64(filePath, st) < 0) { |
| // File is not found or cannot be read. |
| ALOGV("Couldn't stat %s, copying: %s\n", filePath, strerror(errno)); |
| return true; |
| } |
| |
| if (!S_ISREG(st->st_mode)) { |
| return true; |
| } |
| |
| if (st->st_size != fileSize) { |
| return true; |
| } |
| |
| // For some reason, bionic doesn't define st_mtime as time_t |
| if (time_t(st->st_mtime) != modifiedTime) { |
| ALOGV("mod time doesn't match: %ld vs. %ld\n", st->st_mtime, modifiedTime); |
| return true; |
| } |
| |
| int fd = TEMP_FAILURE_RETRY(open(filePath, O_RDONLY)); |
| if (fd < 0) { |
| ALOGV("Couldn't open file %s: %s", filePath, strerror(errno)); |
| return true; |
| } |
| |
| long crc = crc32(0L, Z_NULL, 0); |
| unsigned char crcBuffer[16384]; |
| ssize_t numBytes; |
| while ((numBytes = TEMP_FAILURE_RETRY(read(fd, crcBuffer, sizeof(crcBuffer)))) > 0) { |
| crc = crc32(crc, crcBuffer, numBytes); |
| } |
| close(fd); |
| |
| ALOGV("%s: crc = %lx, zipCrc = %lx\n", filePath, crc, zipCrc); |
| |
| if (crc != zipCrc) { |
| return true; |
| } |
| |
| return false; |
| } |
| |
| static install_status_t |
| sumFiles(JNIEnv*, void* arg, ZipFileRO* zipFile, ZipEntryRO zipEntry, const char*) |
| { |
| size_t* total = (size_t*) arg; |
| size_t uncompLen; |
| |
| if (!zipFile->getEntryInfo(zipEntry, NULL, &uncompLen, NULL, NULL, NULL, NULL)) { |
| return INSTALL_FAILED_INVALID_APK; |
| } |
| |
| *total += uncompLen; |
| |
| return INSTALL_SUCCEEDED; |
| } |
| |
| /* |
| * Copy the native library if needed. |
| * |
| * This function assumes the library and path names passed in are considered safe. |
| */ |
| static install_status_t |
| copyFileIfChanged(JNIEnv *env, void* arg, ZipFileRO* zipFile, ZipEntryRO zipEntry, const char* fileName) |
| { |
| jstring* javaNativeLibPath = (jstring*) arg; |
| ScopedUtfChars nativeLibPath(env, *javaNativeLibPath); |
| |
| size_t uncompLen; |
| long when; |
| long crc; |
| time_t modTime; |
| |
| if (!zipFile->getEntryInfo(zipEntry, NULL, &uncompLen, NULL, NULL, &when, &crc)) { |
| ALOGD("Couldn't read zip entry info\n"); |
| return INSTALL_FAILED_INVALID_APK; |
| } else { |
| struct tm t; |
| ZipUtils::zipTimeToTimespec(when, &t); |
| modTime = mktime(&t); |
| } |
| |
| // Build local file path |
| const size_t fileNameLen = strlen(fileName); |
| char localFileName[nativeLibPath.size() + fileNameLen + 2]; |
| |
| if (strlcpy(localFileName, nativeLibPath.c_str(), sizeof(localFileName)) != nativeLibPath.size()) { |
| ALOGD("Couldn't allocate local file name for library"); |
| return INSTALL_FAILED_INTERNAL_ERROR; |
| } |
| |
| *(localFileName + nativeLibPath.size()) = '/'; |
| |
| if (strlcpy(localFileName + nativeLibPath.size() + 1, fileName, sizeof(localFileName) |
| - nativeLibPath.size() - 1) != fileNameLen) { |
| ALOGD("Couldn't allocate local file name for library"); |
| return INSTALL_FAILED_INTERNAL_ERROR; |
| } |
| |
| // Only copy out the native file if it's different. |
| struct stat64 st; |
| if (!isFileDifferent(localFileName, uncompLen, modTime, crc, &st)) { |
| return INSTALL_SUCCEEDED; |
| } |
| |
| char localTmpFileName[nativeLibPath.size() + TMP_FILE_PATTERN_LEN + 2]; |
| if (strlcpy(localTmpFileName, nativeLibPath.c_str(), sizeof(localTmpFileName)) |
| != nativeLibPath.size()) { |
| ALOGD("Couldn't allocate local file name for library"); |
| return INSTALL_FAILED_INTERNAL_ERROR; |
| } |
| |
| *(localFileName + nativeLibPath.size()) = '/'; |
| |
| if (strlcpy(localTmpFileName + nativeLibPath.size(), TMP_FILE_PATTERN, |
| TMP_FILE_PATTERN_LEN - nativeLibPath.size()) != TMP_FILE_PATTERN_LEN) { |
| ALOGI("Couldn't allocate temporary file name for library"); |
| return INSTALL_FAILED_INTERNAL_ERROR; |
| } |
| |
| int fd = mkstemp(localTmpFileName); |
| if (fd < 0) { |
| ALOGI("Couldn't open temporary file name: %s: %s\n", localTmpFileName, strerror(errno)); |
| return INSTALL_FAILED_CONTAINER_ERROR; |
| } |
| |
| if (!zipFile->uncompressEntry(zipEntry, fd)) { |
| ALOGI("Failed uncompressing %s to %s\n", fileName, localTmpFileName); |
| close(fd); |
| unlink(localTmpFileName); |
| return INSTALL_FAILED_CONTAINER_ERROR; |
| } |
| |
| close(fd); |
| |
| // Set the modification time for this file to the ZIP's mod time. |
| struct timeval times[2]; |
| times[0].tv_sec = st.st_atime; |
| times[1].tv_sec = modTime; |
| times[0].tv_usec = times[1].tv_usec = 0; |
| if (utimes(localTmpFileName, times) < 0) { |
| ALOGI("Couldn't change modification time on %s: %s\n", localTmpFileName, strerror(errno)); |
| unlink(localTmpFileName); |
| return INSTALL_FAILED_CONTAINER_ERROR; |
| } |
| |
| // Set the mode to 755 |
| static const mode_t mode = S_IRUSR | S_IWUSR | S_IXUSR | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH; |
| if (chmod(localTmpFileName, mode) < 0) { |
| ALOGI("Couldn't change permissions on %s: %s\n", localTmpFileName, strerror(errno)); |
| unlink(localTmpFileName); |
| return INSTALL_FAILED_CONTAINER_ERROR; |
| } |
| |
| // Finally, rename it to the final name. |
| if (rename(localTmpFileName, localFileName) < 0) { |
| ALOGI("Couldn't rename %s to %s: %s\n", localTmpFileName, localFileName, strerror(errno)); |
| unlink(localTmpFileName); |
| return INSTALL_FAILED_CONTAINER_ERROR; |
| } |
| |
| ALOGV("Successfully moved %s to %s\n", localTmpFileName, localFileName); |
| |
| return INSTALL_SUCCEEDED; |
| } |
| |
| /* |
| * An iterator over all shared libraries in a zip file. An entry is |
| * considered to be a shared library if all of the conditions below are |
| * satisfied : |
| * |
| * - The entry is under the lib/ directory. |
| * - The entry name ends with ".so" and the entry name starts with "lib", |
| * an exception is made for entries whose name is "gdbserver". |
| * - The entry filename is "safe" (as determined by isFilenameSafe). |
| * |
| */ |
| class NativeLibrariesIterator { |
| private: |
| NativeLibrariesIterator(ZipFileRO* zipFile, void* cookie) |
| : mZipFile(zipFile), mCookie(cookie), mLastSlash(NULL) { |
| fileName[0] = '\0'; |
| } |
| |
| public: |
| static NativeLibrariesIterator* create(ZipFileRO* zipFile) { |
| void* cookie = NULL; |
| if (!zipFile->startIteration(&cookie)) { |
| return NULL; |
| } |
| |
| return new NativeLibrariesIterator(zipFile, cookie); |
| } |
| |
| ZipEntryRO next() { |
| ZipEntryRO next = NULL; |
| while ((next = mZipFile->nextEntry(mCookie)) != NULL) { |
| // Make sure this entry has a filename. |
| if (mZipFile->getEntryFileName(next, fileName, sizeof(fileName))) { |
| continue; |
| } |
| |
| // Make sure we're in the lib directory of the ZIP. |
| if (strncmp(fileName, APK_LIB, APK_LIB_LEN)) { |
| continue; |
| } |
| |
| // Make sure the filename is at least to the minimum library name size. |
| const size_t fileNameLen = strlen(fileName); |
| static const size_t minLength = APK_LIB_LEN + 2 + LIB_PREFIX_LEN + 1 + LIB_SUFFIX_LEN; |
| if (fileNameLen < minLength) { |
| continue; |
| } |
| |
| const char* lastSlash = strrchr(fileName, '/'); |
| ALOG_ASSERT(lastSlash != NULL, "last slash was null somehow for %s\n", fileName); |
| |
| // Exception: If we find the gdbserver binary, return it. |
| if (!strncmp(lastSlash + 1, GDBSERVER, GDBSERVER_LEN)) { |
| break; |
| } |
| |
| // Make sure the filename starts with lib and ends with ".so". |
| if (strncmp(fileName + fileNameLen - LIB_SUFFIX_LEN, LIB_SUFFIX, LIB_SUFFIX_LEN) |
| || strncmp(lastSlash, LIB_PREFIX, LIB_PREFIX_LEN)) { |
| continue; |
| } |
| |
| // Make sure the filename is safe. |
| if (!isFilenameSafe(lastSlash + 1)) { |
| continue; |
| } |
| |
| mLastSlash = lastSlash; |
| break; |
| } |
| |
| return next; |
| } |
| |
| inline const char* currentEntry() const { |
| return fileName; |
| } |
| |
| inline const char* lastSlash() const { |
| return mLastSlash; |
| } |
| |
| virtual ~NativeLibrariesIterator() { |
| mZipFile->endIteration(mCookie); |
| } |
| private: |
| |
| char fileName[PATH_MAX]; |
| ZipFileRO* const mZipFile; |
| void* mCookie; |
| const char* mLastSlash; |
| }; |
| |
| static install_status_t |
| iterateOverNativeFiles(JNIEnv *env, jlong apkHandle, jstring javaCpuAbi, |
| iterFunc callFunc, void* callArg) { |
| ZipFileRO* zipFile = reinterpret_cast<ZipFileRO*>(apkHandle); |
| if (zipFile == NULL) { |
| return INSTALL_FAILED_INVALID_APK; |
| } |
| |
| UniquePtr<NativeLibrariesIterator> it(NativeLibrariesIterator::create(zipFile)); |
| if (it.get() == NULL) { |
| return INSTALL_FAILED_INVALID_APK; |
| } |
| |
| const ScopedUtfChars cpuAbi(env, javaCpuAbi); |
| if (cpuAbi.c_str() == NULL) { |
| // This would've thrown, so this return code isn't observable by |
| // Java. |
| return INSTALL_FAILED_INVALID_APK; |
| } |
| ZipEntryRO entry = NULL; |
| while ((entry = it->next()) != NULL) { |
| const char* fileName = it->currentEntry(); |
| const char* lastSlash = it->lastSlash(); |
| |
| // Check to make sure the CPU ABI of this file is one we support. |
| const char* cpuAbiOffset = fileName + APK_LIB_LEN; |
| const size_t cpuAbiRegionSize = lastSlash - cpuAbiOffset; |
| |
| if (cpuAbi.size() == cpuAbiRegionSize && !strncmp(cpuAbiOffset, cpuAbi.c_str(), cpuAbiRegionSize)) { |
| install_status_t ret = callFunc(env, callArg, zipFile, entry, lastSlash + 1); |
| |
| if (ret != INSTALL_SUCCEEDED) { |
| ALOGV("Failure for entry %s", lastSlash + 1); |
| return ret; |
| } |
| } |
| } |
| |
| return INSTALL_SUCCEEDED; |
| } |
| |
| |
| static int findSupportedAbi(JNIEnv *env, jlong apkHandle, jobjectArray supportedAbisArray) { |
| const int numAbis = env->GetArrayLength(supportedAbisArray); |
| Vector<ScopedUtfChars*> supportedAbis; |
| |
| for (int i = 0; i < numAbis; ++i) { |
| supportedAbis.add(new ScopedUtfChars(env, |
| (jstring) env->GetObjectArrayElement(supportedAbisArray, i))); |
| } |
| |
| ZipFileRO* zipFile = reinterpret_cast<ZipFileRO*>(apkHandle); |
| if (zipFile == NULL) { |
| return INSTALL_FAILED_INVALID_APK; |
| } |
| |
| UniquePtr<NativeLibrariesIterator> it(NativeLibrariesIterator::create(zipFile)); |
| if (it.get() == NULL) { |
| return INSTALL_FAILED_INVALID_APK; |
| } |
| |
| ZipEntryRO entry = NULL; |
| char fileName[PATH_MAX]; |
| int status = NO_NATIVE_LIBRARIES; |
| while ((entry = it->next()) != NULL) { |
| // We're currently in the lib/ directory of the APK, so it does have some native |
| // code. We should return INSTALL_FAILED_NO_MATCHING_ABIS if none of the |
| // libraries match. |
| if (status == NO_NATIVE_LIBRARIES) { |
| status = INSTALL_FAILED_NO_MATCHING_ABIS; |
| } |
| |
| const char* fileName = it->currentEntry(); |
| const char* lastSlash = it->lastSlash(); |
| |
| // Check to see if this CPU ABI matches what we are looking for. |
| const char* abiOffset = fileName + APK_LIB_LEN; |
| const size_t abiSize = lastSlash - abiOffset; |
| for (int i = 0; i < numAbis; i++) { |
| const ScopedUtfChars* abi = supportedAbis[i]; |
| if (abi->size() == abiSize && !strncmp(abiOffset, abi->c_str(), abiSize)) { |
| // The entry that comes in first (i.e. with a lower index) has the higher priority. |
| if (((i < status) && (status >= 0)) || (status < 0) ) { |
| status = i; |
| } |
| } |
| } |
| } |
| |
| for (int i = 0; i < numAbis; ++i) { |
| delete supportedAbis[i]; |
| } |
| |
| return status; |
| } |
| |
| static jint |
| com_android_internal_content_NativeLibraryHelper_copyNativeBinaries(JNIEnv *env, jclass clazz, |
| jlong apkHandle, jstring javaNativeLibPath, jstring javaCpuAbi) |
| { |
| return (jint) iterateOverNativeFiles(env, apkHandle, javaCpuAbi, |
| copyFileIfChanged, &javaNativeLibPath); |
| } |
| |
| static jlong |
| com_android_internal_content_NativeLibraryHelper_sumNativeBinaries(JNIEnv *env, jclass clazz, |
| jlong apkHandle, jstring javaCpuAbi) |
| { |
| size_t totalSize = 0; |
| |
| iterateOverNativeFiles(env, apkHandle, javaCpuAbi, sumFiles, &totalSize); |
| |
| return totalSize; |
| } |
| |
| static jint |
| com_android_internal_content_NativeLibraryHelper_findSupportedAbi(JNIEnv *env, jclass clazz, |
| jlong apkHandle, jobjectArray javaCpuAbisToSearch) |
| { |
| return (jint) findSupportedAbi(env, apkHandle, javaCpuAbisToSearch); |
| } |
| |
| enum bitcode_scan_result_t { |
| APK_SCAN_ERROR = -1, |
| NO_BITCODE_PRESENT = 0, |
| BITCODE_PRESENT = 1, |
| }; |
| |
| static jint |
| com_android_internal_content_NativeLibraryHelper_hasRenderscriptBitcode(JNIEnv *env, jclass clazz, |
| jlong apkHandle) { |
| ZipFileRO* zipFile = reinterpret_cast<ZipFileRO*>(apkHandle); |
| void* cookie = NULL; |
| if (!zipFile->startIteration(&cookie)) { |
| return APK_SCAN_ERROR; |
| } |
| |
| char fileName[PATH_MAX]; |
| ZipEntryRO next = NULL; |
| while ((next = zipFile->nextEntry(cookie)) != NULL) { |
| if (zipFile->getEntryFileName(next, fileName, sizeof(fileName))) { |
| continue; |
| } |
| |
| const size_t fileNameLen = strlen(fileName); |
| const char* lastSlash = strrchr(fileName, '/'); |
| const char* baseName = (lastSlash == NULL) ? fileName : fileName + 1; |
| if (!strncmp(fileName + fileNameLen - RS_BITCODE_SUFFIX_LEN, RS_BITCODE_SUFFIX, |
| RS_BITCODE_SUFFIX_LEN) && isFilenameSafe(baseName)) { |
| zipFile->endIteration(cookie); |
| return BITCODE_PRESENT; |
| } |
| } |
| |
| zipFile->endIteration(cookie); |
| return NO_BITCODE_PRESENT; |
| } |
| |
| static jlong |
| com_android_internal_content_NativeLibraryHelper_openApk(JNIEnv *env, jclass, jstring apkPath) |
| { |
| ScopedUtfChars filePath(env, apkPath); |
| ZipFileRO* zipFile = ZipFileRO::open(filePath.c_str()); |
| |
| return reinterpret_cast<jlong>(zipFile); |
| } |
| |
| static void |
| com_android_internal_content_NativeLibraryHelper_close(JNIEnv *env, jclass, jlong apkHandle) |
| { |
| delete reinterpret_cast<ZipFileRO*>(apkHandle); |
| } |
| |
| static JNINativeMethod gMethods[] = { |
| {"nativeOpenApk", |
| "(Ljava/lang/String;)J", |
| (void *)com_android_internal_content_NativeLibraryHelper_openApk}, |
| {"nativeClose", |
| "(J)V", |
| (void *)com_android_internal_content_NativeLibraryHelper_close}, |
| {"nativeCopyNativeBinaries", |
| "(JLjava/lang/String;Ljava/lang/String;)I", |
| (void *)com_android_internal_content_NativeLibraryHelper_copyNativeBinaries}, |
| {"nativeSumNativeBinaries", |
| "(JLjava/lang/String;)J", |
| (void *)com_android_internal_content_NativeLibraryHelper_sumNativeBinaries}, |
| {"nativeFindSupportedAbi", |
| "(J[Ljava/lang/String;)I", |
| (void *)com_android_internal_content_NativeLibraryHelper_findSupportedAbi}, |
| {"hasRenderscriptBitcode", "(J)I", |
| (void *)com_android_internal_content_NativeLibraryHelper_hasRenderscriptBitcode}, |
| }; |
| |
| |
| int register_com_android_internal_content_NativeLibraryHelper(JNIEnv *env) |
| { |
| return AndroidRuntime::registerNativeMethods(env, |
| "com/android/internal/content/NativeLibraryHelper", gMethods, NELEM(gMethods)); |
| } |
| |
| }; |