Kenny Root | 85387d7 | 2010-08-26 10:13:11 -0700 | [diff] [blame] | 1 | package com.android.internal.content; |
| 2 | |
| 3 | import android.content.pm.PackageManager; |
| 4 | import android.os.Build; |
| 5 | import android.os.FileUtils; |
| 6 | import android.os.SystemProperties; |
| 7 | import android.util.Config; |
| 8 | import android.util.Log; |
| 9 | import android.util.Pair; |
| 10 | import android.util.Slog; |
| 11 | |
| 12 | import java.io.File; |
| 13 | import java.io.IOException; |
| 14 | import java.io.InputStream; |
| 15 | import java.util.Enumeration; |
| 16 | import java.util.LinkedList; |
| 17 | import java.util.List; |
| 18 | import java.util.zip.ZipEntry; |
| 19 | import java.util.zip.ZipException; |
| 20 | import java.util.zip.ZipFile; |
| 21 | |
| 22 | /** |
| 23 | * Native libraries helper. |
| 24 | * |
| 25 | * @hide |
| 26 | */ |
| 27 | public class NativeLibraryHelper { |
| 28 | private static final String TAG = "NativeHelper"; |
| 29 | |
| 30 | private static final boolean DEBUG_NATIVE = false; |
| 31 | |
| 32 | /* |
| 33 | * The following constants are returned by listPackageSharedLibsForAbiLI |
| 34 | * to indicate if native shared libraries were found in the package. |
| 35 | * Values are: |
| 36 | * PACKAGE_INSTALL_NATIVE_FOUND_LIBRARIES => native libraries found and installed |
| 37 | * PACKAGE_INSTALL_NATIVE_NO_LIBRARIES => no native libraries in package |
| 38 | * PACKAGE_INSTALL_NATIVE_ABI_MISMATCH => native libraries for another ABI found |
| 39 | * in package (and not installed) |
| 40 | * |
| 41 | */ |
| 42 | private static final int PACKAGE_INSTALL_NATIVE_FOUND_LIBRARIES = 0; |
| 43 | private static final int PACKAGE_INSTALL_NATIVE_NO_LIBRARIES = 1; |
| 44 | private static final int PACKAGE_INSTALL_NATIVE_ABI_MISMATCH = 2; |
| 45 | |
| 46 | // Directory in the APK that holds all the native shared libraries. |
| 47 | private static final String APK_LIB = "lib/"; |
| 48 | private static final int APK_LIB_LENGTH = APK_LIB.length(); |
| 49 | |
| 50 | // Prefix that native shared libraries must have. |
| 51 | private static final String LIB_PREFIX = "lib"; |
| 52 | private static final int LIB_PREFIX_LENGTH = LIB_PREFIX.length(); |
| 53 | |
| 54 | // Suffix that the native shared libraries must have. |
| 55 | private static final String LIB_SUFFIX = ".so"; |
| 56 | private static final int LIB_SUFFIX_LENGTH = LIB_SUFFIX.length(); |
| 57 | |
| 58 | // Name of the GDB binary. |
| 59 | private static final String GDBSERVER = "gdbserver"; |
| 60 | |
| 61 | // the minimum length of a valid native shared library of the form |
| 62 | // lib/<something>/lib<name>.so. |
| 63 | private static final int MIN_ENTRY_LENGTH = APK_LIB_LENGTH + 2 + LIB_PREFIX_LENGTH + 1 |
| 64 | + LIB_SUFFIX_LENGTH; |
| 65 | |
| 66 | /* |
| 67 | * Find all files of the form lib/<cpuAbi>/lib<name>.so in the .apk |
| 68 | * and add them to a list to be installed later. |
| 69 | * |
| 70 | * NOTE: this method may throw an IOException if the library cannot |
| 71 | * be copied to its final destination, e.g. if there isn't enough |
| 72 | * room left on the data partition, or a ZipException if the package |
| 73 | * file is malformed. |
| 74 | */ |
| 75 | private static int listPackageSharedLibsForAbiLI(ZipFile zipFile, |
| 76 | String cpuAbi, List<Pair<ZipEntry, String>> libEntries) throws IOException, |
| 77 | ZipException { |
| 78 | final int cpuAbiLen = cpuAbi.length(); |
| 79 | boolean hasNativeLibraries = false; |
| 80 | boolean installedNativeLibraries = false; |
| 81 | |
| 82 | if (DEBUG_NATIVE) { |
| 83 | Slog.d(TAG, "Checking " + zipFile.getName() + " for shared libraries of CPU ABI type " |
| 84 | + cpuAbi); |
| 85 | } |
| 86 | |
| 87 | Enumeration<? extends ZipEntry> entries = zipFile.entries(); |
| 88 | |
| 89 | while (entries.hasMoreElements()) { |
| 90 | ZipEntry entry = entries.nextElement(); |
| 91 | |
| 92 | // skip directories |
| 93 | if (entry.isDirectory()) { |
| 94 | continue; |
| 95 | } |
| 96 | String entryName = entry.getName(); |
| 97 | |
| 98 | /* |
| 99 | * Check that the entry looks like lib/<something>/lib<name>.so |
| 100 | * here, but don't check the ABI just yet. |
| 101 | * |
| 102 | * - must be sufficiently long |
| 103 | * - must end with LIB_SUFFIX, i.e. ".so" |
| 104 | * - must start with APK_LIB, i.e. "lib/" |
| 105 | */ |
| 106 | if (entryName.length() < MIN_ENTRY_LENGTH || !entryName.endsWith(LIB_SUFFIX) |
| 107 | || !entryName.startsWith(APK_LIB)) { |
| 108 | continue; |
| 109 | } |
| 110 | |
| 111 | // file name must start with LIB_PREFIX, i.e. "lib" |
| 112 | int lastSlash = entryName.lastIndexOf('/'); |
| 113 | |
| 114 | if (lastSlash < 0 |
| 115 | || !entryName.regionMatches(lastSlash + 1, LIB_PREFIX, 0, LIB_PREFIX_LENGTH)) { |
| 116 | continue; |
| 117 | } |
| 118 | |
| 119 | hasNativeLibraries = true; |
| 120 | |
| 121 | // check the cpuAbi now, between lib/ and /lib<name>.so |
| 122 | if (lastSlash != APK_LIB_LENGTH + cpuAbiLen |
| 123 | || !entryName.regionMatches(APK_LIB_LENGTH, cpuAbi, 0, cpuAbiLen)) |
| 124 | continue; |
| 125 | |
| 126 | /* |
| 127 | * Extract the library file name, ensure it doesn't contain |
| 128 | * weird characters. we're guaranteed here that it doesn't contain |
| 129 | * a directory separator though. |
| 130 | */ |
| 131 | String libFileName = entryName.substring(lastSlash+1); |
| 132 | if (!FileUtils.isFilenameSafe(new File(libFileName))) { |
| 133 | continue; |
| 134 | } |
| 135 | |
| 136 | installedNativeLibraries = true; |
| 137 | |
| 138 | if (DEBUG_NATIVE) { |
| 139 | Log.d(TAG, "Caching shared lib " + entry.getName()); |
| 140 | } |
| 141 | |
| 142 | libEntries.add(Pair.create(entry, libFileName)); |
| 143 | } |
| 144 | if (!hasNativeLibraries) |
| 145 | return PACKAGE_INSTALL_NATIVE_NO_LIBRARIES; |
| 146 | |
| 147 | if (!installedNativeLibraries) |
| 148 | return PACKAGE_INSTALL_NATIVE_ABI_MISMATCH; |
| 149 | |
| 150 | return PACKAGE_INSTALL_NATIVE_FOUND_LIBRARIES; |
| 151 | } |
| 152 | |
| 153 | /* |
| 154 | * Find the gdbserver executable program in a package at |
| 155 | * lib/<cpuAbi>/gdbserver and add it to the list of binaries |
| 156 | * to be copied out later. |
| 157 | * |
| 158 | * Returns PACKAGE_INSTALL_NATIVE_FOUND_LIBRARIES on success, |
| 159 | * or PACKAGE_INSTALL_NATIVE_NO_LIBRARIES otherwise. |
| 160 | */ |
| 161 | private static int listPackageGdbServerLI(ZipFile zipFile, String cpuAbi, |
| 162 | List<Pair<ZipEntry, String>> nativeFiles) throws IOException, ZipException { |
| 163 | final String apkGdbServerPath = "lib/" + cpuAbi + "/" + GDBSERVER; |
| 164 | |
| 165 | Enumeration<? extends ZipEntry> entries = zipFile.entries(); |
| 166 | |
| 167 | while (entries.hasMoreElements()) { |
| 168 | ZipEntry entry = entries.nextElement(); |
| 169 | // skip directories |
| 170 | if (entry.isDirectory()) { |
| 171 | continue; |
| 172 | } |
| 173 | String entryName = entry.getName(); |
| 174 | |
| 175 | if (!entryName.equals(apkGdbServerPath)) { |
| 176 | continue; |
| 177 | } |
| 178 | |
| 179 | if (Config.LOGD) { |
| 180 | Log.d(TAG, "Found gdbserver: " + entry.getName()); |
| 181 | } |
| 182 | |
Kenny Root | e6da118 | 2010-09-30 14:13:59 -0700 | [diff] [blame] | 183 | final String installGdbServerPath = GDBSERVER; |
Kenny Root | 85387d7 | 2010-08-26 10:13:11 -0700 | [diff] [blame] | 184 | nativeFiles.add(Pair.create(entry, installGdbServerPath)); |
| 185 | |
| 186 | return PACKAGE_INSTALL_NATIVE_FOUND_LIBRARIES; |
| 187 | } |
| 188 | return PACKAGE_INSTALL_NATIVE_NO_LIBRARIES; |
| 189 | } |
| 190 | |
| 191 | /* |
| 192 | * Examine shared libraries stored in the APK as |
| 193 | * lib/<cpuAbi>/lib<name>.so and add them to a list to be copied |
| 194 | * later. |
| 195 | * |
| 196 | * This function will first try the main CPU ABI defined by Build.CPU_ABI |
| 197 | * (which corresponds to ro.product.cpu.abi), and also try an alternate |
| 198 | * one if ro.product.cpu.abi2 is defined. |
| 199 | */ |
| 200 | public static int listPackageNativeBinariesLI(ZipFile zipFile, |
| 201 | List<Pair<ZipEntry, String>> nativeFiles) throws ZipException, IOException { |
| 202 | String cpuAbi = Build.CPU_ABI; |
| 203 | |
| 204 | int result = listPackageSharedLibsForAbiLI(zipFile, cpuAbi, nativeFiles); |
| 205 | |
| 206 | /* |
| 207 | * Some architectures are capable of supporting several CPU ABIs |
| 208 | * for example, 'armeabi-v7a' also supports 'armeabi' native code |
| 209 | * this is indicated by the definition of the ro.product.cpu.abi2 |
| 210 | * system property. |
| 211 | * |
| 212 | * only scan the package twice in case of ABI mismatch |
| 213 | */ |
| 214 | if (result == PACKAGE_INSTALL_NATIVE_ABI_MISMATCH) { |
| 215 | final String cpuAbi2 = SystemProperties.get("ro.product.cpu.abi2", null); |
| 216 | if (cpuAbi2 != null) { |
| 217 | result = listPackageSharedLibsForAbiLI(zipFile, cpuAbi2, nativeFiles); |
| 218 | } |
| 219 | |
| 220 | if (result == PACKAGE_INSTALL_NATIVE_ABI_MISMATCH) { |
| 221 | Slog.w(TAG, "Native ABI mismatch from package file"); |
| 222 | return PackageManager.INSTALL_FAILED_INVALID_APK; |
| 223 | } |
| 224 | |
| 225 | if (result == PACKAGE_INSTALL_NATIVE_FOUND_LIBRARIES) { |
| 226 | cpuAbi = cpuAbi2; |
| 227 | } |
| 228 | } |
| 229 | |
| 230 | /* |
| 231 | * Debuggable packages may have gdbserver embedded, so add it to |
| 232 | * the list to the list of items to be extracted (as lib/gdbserver) |
| 233 | * into the application's native library directory later. |
| 234 | */ |
| 235 | if (result == PACKAGE_INSTALL_NATIVE_FOUND_LIBRARIES) { |
| 236 | listPackageGdbServerLI(zipFile, cpuAbi, nativeFiles); |
| 237 | } |
| 238 | return PackageManager.INSTALL_SUCCEEDED; |
| 239 | } |
| 240 | |
| 241 | public static int copyNativeBinariesLI(File scanFile, File sharedLibraryDir) { |
| 242 | /* |
| 243 | * Check all the native files that need to be copied and add |
| 244 | * that to the container size. |
| 245 | */ |
| 246 | ZipFile zipFile; |
| 247 | try { |
| 248 | zipFile = new ZipFile(scanFile); |
| 249 | |
| 250 | List<Pair<ZipEntry, String>> nativeFiles = new LinkedList<Pair<ZipEntry, String>>(); |
| 251 | |
| 252 | NativeLibraryHelper.listPackageNativeBinariesLI(zipFile, nativeFiles); |
| 253 | |
| 254 | final int N = nativeFiles.size(); |
| 255 | |
| 256 | for (int i = 0; i < N; i++) { |
| 257 | final Pair<ZipEntry, String> entry = nativeFiles.get(i); |
| 258 | |
| 259 | File destFile = new File(sharedLibraryDir, entry.second); |
| 260 | copyNativeBinaryLI(zipFile, entry.first, sharedLibraryDir, destFile); |
| 261 | } |
Brian Carlstrom | fd9ddd1 | 2010-11-04 11:24:58 -0700 | [diff] [blame] | 262 | zipFile.close(); |
Kenny Root | 85387d7 | 2010-08-26 10:13:11 -0700 | [diff] [blame] | 263 | } catch (ZipException e) { |
| 264 | Slog.w(TAG, "Failed to extract data from package file", e); |
| 265 | return PackageManager.INSTALL_FAILED_INVALID_APK; |
| 266 | } catch (IOException e) { |
| 267 | Slog.w(TAG, "Failed to cache package shared libs", e); |
| 268 | return PackageManager.INSTALL_FAILED_INSUFFICIENT_STORAGE; |
| 269 | } |
| 270 | |
| 271 | return PackageManager.INSTALL_SUCCEEDED; |
| 272 | } |
| 273 | |
| 274 | private static void copyNativeBinaryLI(ZipFile zipFile, ZipEntry entry, |
| 275 | File binaryDir, File binaryFile) throws IOException { |
| 276 | InputStream inputStream = zipFile.getInputStream(entry); |
| 277 | try { |
| 278 | File tempFile = File.createTempFile("tmp", "tmp", binaryDir); |
| 279 | String tempFilePath = tempFile.getPath(); |
| 280 | // XXX package manager can't change owner, so the executable files for |
| 281 | // now need to be left as world readable and owned by the system. |
| 282 | if (!FileUtils.copyToFile(inputStream, tempFile) |
| 283 | || !tempFile.setLastModified(entry.getTime()) |
| 284 | || FileUtils.setPermissions(tempFilePath, FileUtils.S_IRUSR | FileUtils.S_IWUSR |
| 285 | | FileUtils.S_IRGRP | FileUtils.S_IXUSR | FileUtils.S_IXGRP |
| 286 | | FileUtils.S_IXOTH | FileUtils.S_IROTH, -1, -1) != 0 |
| 287 | || !tempFile.renameTo(binaryFile)) { |
| 288 | // Failed to properly write file. |
| 289 | tempFile.delete(); |
| 290 | throw new IOException("Couldn't create cached binary " + binaryFile + " in " |
| 291 | + binaryDir); |
| 292 | } |
| 293 | } finally { |
| 294 | inputStream.close(); |
| 295 | } |
| 296 | } |
Kenny Root | 8f7cc02 | 2010-09-12 09:04:56 -0700 | [diff] [blame] | 297 | |
Kenny Root | 831baa2 | 2010-10-05 12:29:25 -0700 | [diff] [blame] | 298 | // Convenience method to call removeNativeBinariesFromDirLI(File) |
| 299 | public static boolean removeNativeBinariesLI(String nativeLibraryPath) { |
| 300 | return removeNativeBinariesFromDirLI(new File(nativeLibraryPath)); |
| 301 | } |
| 302 | |
Kenny Root | 8f7cc02 | 2010-09-12 09:04:56 -0700 | [diff] [blame] | 303 | // Remove the native binaries of a given package. This simply |
| 304 | // gets rid of the files in the 'lib' sub-directory. |
Kenny Root | 831baa2 | 2010-10-05 12:29:25 -0700 | [diff] [blame] | 305 | public static boolean removeNativeBinariesFromDirLI(File nativeLibraryDir) { |
Kenny Root | 8f7cc02 | 2010-09-12 09:04:56 -0700 | [diff] [blame] | 306 | if (DEBUG_NATIVE) { |
Kenny Root | 831baa2 | 2010-10-05 12:29:25 -0700 | [diff] [blame] | 307 | Slog.w(TAG, "Deleting native binaries from: " + nativeLibraryDir.getPath()); |
Kenny Root | 8f7cc02 | 2010-09-12 09:04:56 -0700 | [diff] [blame] | 308 | } |
| 309 | |
Kenny Root | 831baa2 | 2010-10-05 12:29:25 -0700 | [diff] [blame] | 310 | boolean deletedFiles = false; |
| 311 | |
Kenny Root | 8f7cc02 | 2010-09-12 09:04:56 -0700 | [diff] [blame] | 312 | /* |
| 313 | * Just remove any file in the directory. Since the directory is owned |
| 314 | * by the 'system' UID, the application is not supposed to have written |
| 315 | * anything there. |
| 316 | */ |
Kenny Root | 831baa2 | 2010-10-05 12:29:25 -0700 | [diff] [blame] | 317 | if (nativeLibraryDir.exists()) { |
| 318 | final File[] binaries = nativeLibraryDir.listFiles(); |
Kenny Root | 8f7cc02 | 2010-09-12 09:04:56 -0700 | [diff] [blame] | 319 | if (binaries != null) { |
| 320 | for (int nn = 0; nn < binaries.length; nn++) { |
| 321 | if (DEBUG_NATIVE) { |
| 322 | Slog.d(TAG, " Deleting " + binaries[nn].getName()); |
| 323 | } |
Kenny Root | 831baa2 | 2010-10-05 12:29:25 -0700 | [diff] [blame] | 324 | |
Kenny Root | 8f7cc02 | 2010-09-12 09:04:56 -0700 | [diff] [blame] | 325 | if (!binaries[nn].delete()) { |
| 326 | Slog.w(TAG, "Could not delete native binary: " + binaries[nn].getPath()); |
Kenny Root | 831baa2 | 2010-10-05 12:29:25 -0700 | [diff] [blame] | 327 | } else { |
| 328 | deletedFiles = true; |
Kenny Root | 8f7cc02 | 2010-09-12 09:04:56 -0700 | [diff] [blame] | 329 | } |
| 330 | } |
| 331 | } |
| 332 | // Do not delete 'lib' directory itself, or this will prevent |
| 333 | // installation of future updates. |
| 334 | } |
Kenny Root | 831baa2 | 2010-10-05 12:29:25 -0700 | [diff] [blame] | 335 | |
| 336 | return deletedFiles; |
Kenny Root | 8f7cc02 | 2010-09-12 09:04:56 -0700 | [diff] [blame] | 337 | } |
Kenny Root | 85387d7 | 2010-08-26 10:13:11 -0700 | [diff] [blame] | 338 | } |