| /* |
| * Copyright 2016, Google Inc. |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are |
| * met: |
| * |
| * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * Redistributions in binary form must reproduce the above |
| * copyright notice, this list of conditions and the following disclaimer |
| * in the documentation and/or other materials provided with the |
| * distribution. |
| * Neither the name of Google Inc. nor the names of its |
| * contributors may be used to endorse or promote products derived from |
| * this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| package org.jf.dexlib2.dexbacked; |
| |
| import com.google.common.collect.Lists; |
| import com.google.common.io.ByteStreams; |
| import org.jf.dexlib2.Opcodes; |
| import org.jf.dexlib2.dexbacked.DexBackedDexFile.NotADexFile; |
| import org.jf.dexlib2.dexbacked.ZipDexContainer.ZipDexFile; |
| import org.jf.dexlib2.iface.MultiDexContainer; |
| import org.jf.dexlib2.util.DexUtil; |
| import org.jf.dexlib2.util.DexUtil.InvalidFile; |
| import org.jf.dexlib2.util.DexUtil.UnsupportedFile; |
| |
| import javax.annotation.Nonnull; |
| import javax.annotation.Nullable; |
| import java.io.BufferedInputStream; |
| import java.io.File; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.util.Enumeration; |
| import java.util.List; |
| import java.util.zip.ZipEntry; |
| import java.util.zip.ZipFile; |
| |
| /** |
| * Represents a zip file that contains dex files (i.e. an apk or jar file) |
| */ |
| public class ZipDexContainer implements MultiDexContainer<ZipDexFile> { |
| |
| private final File zipFilePath; |
| private final Opcodes opcodes; |
| |
| /** |
| * Constructs a new ZipDexContainer for the given zip file |
| * |
| * @param zipFilePath The path to the zip file |
| * @param opcodes The Opcodes instance to use when loading dex files from this container |
| */ |
| public ZipDexContainer(@Nonnull File zipFilePath, @Nonnull Opcodes opcodes) { |
| this.zipFilePath = zipFilePath; |
| this.opcodes = opcodes; |
| } |
| |
| @Nonnull @Override public Opcodes getOpcodes() { |
| return opcodes; |
| } |
| |
| /** |
| * Gets a list of the names of dex files in this zip file. |
| * |
| * @return A list of the names of dex files in this zip file |
| */ |
| @Nonnull @Override public List<String> getDexEntryNames() throws IOException { |
| List<String> entryNames = Lists.newArrayList(); |
| ZipFile zipFile = getZipFile(); |
| try { |
| Enumeration<? extends ZipEntry> entriesEnumeration = zipFile.entries(); |
| |
| while (entriesEnumeration.hasMoreElements()) { |
| ZipEntry entry = entriesEnumeration.nextElement(); |
| |
| if (!isDex(zipFile, entry)) { |
| continue; |
| } |
| |
| entryNames.add(entry.getName()); |
| } |
| |
| return entryNames; |
| } finally { |
| zipFile.close(); |
| } |
| } |
| |
| /** |
| * Loads a dex file from a specific named entry. |
| * |
| * @param entryName The name of the entry |
| * @return A ZipDexFile, or null if there is no entry with the given name |
| * @throws NotADexFile If the entry isn't a dex file |
| */ |
| @Nullable @Override public ZipDexFile getEntry(@Nonnull String entryName) throws IOException { |
| ZipFile zipFile = getZipFile(); |
| try { |
| ZipEntry entry = zipFile.getEntry(entryName); |
| if (entry == null) { |
| return null; |
| } |
| |
| return loadEntry(zipFile, entry); |
| } finally { |
| zipFile.close(); |
| } |
| } |
| |
| public boolean isZipFile() { |
| ZipFile zipFile = null; |
| try { |
| zipFile = getZipFile(); |
| return true; |
| } catch (IOException ex) { |
| return false; |
| } catch (NotAZipFileException ex) { |
| return false; |
| } finally { |
| if(zipFile != null) { |
| try { |
| zipFile.close(); |
| } catch (IOException ex) { |
| // just eat it |
| } |
| } |
| } |
| } |
| |
| public class ZipDexFile extends DexBackedDexFile implements MultiDexContainer.MultiDexFile { |
| |
| private final String entryName; |
| |
| protected ZipDexFile(@Nonnull Opcodes opcodes, @Nonnull byte[] buf, @Nonnull String entryName) { |
| super(opcodes, buf, 0); |
| this.entryName = entryName; |
| } |
| |
| @Nonnull @Override public String getEntryName() { |
| return entryName; |
| } |
| |
| @Nonnull @Override public MultiDexContainer getContainer() { |
| return ZipDexContainer.this; |
| } |
| } |
| |
| protected boolean isDex(@Nonnull ZipFile zipFile, @Nonnull ZipEntry zipEntry) throws IOException { |
| InputStream inputStream = new BufferedInputStream(zipFile.getInputStream(zipEntry)); |
| try { |
| DexUtil.verifyDexHeader(inputStream); |
| } catch (NotADexFile ex) { |
| return false; |
| } catch (InvalidFile ex) { |
| return false; |
| } catch (UnsupportedFile ex) { |
| return false; |
| } finally { |
| inputStream.close(); |
| } |
| return true; |
| } |
| |
| protected ZipFile getZipFile() throws IOException { |
| try { |
| return new ZipFile(zipFilePath); |
| } catch (IOException ex) { |
| throw new NotAZipFileException(); |
| } |
| } |
| |
| @Nonnull |
| protected ZipDexFile loadEntry(@Nonnull ZipFile zipFile, @Nonnull ZipEntry zipEntry) throws IOException { |
| InputStream inputStream = zipFile.getInputStream(zipEntry); |
| try { |
| byte[] buf = ByteStreams.toByteArray(inputStream); |
| return new ZipDexFile(opcodes, buf, zipEntry.getName()); |
| } finally { |
| inputStream.close(); |
| } |
| } |
| |
| public static class NotAZipFileException extends RuntimeException { |
| } |
| } |