| /* |
| * Copyright 2012, 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.io.ByteStreams; |
| import org.jf.dexlib2.Opcodes; |
| import org.jf.dexlib2.dexbacked.raw.*; |
| import org.jf.dexlib2.dexbacked.util.FixedSizeSet; |
| import org.jf.dexlib2.iface.DexFile; |
| import org.jf.util.ExceptionWithContext; |
| |
| import javax.annotation.Nonnull; |
| import javax.annotation.Nullable; |
| import java.io.EOFException; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.util.Set; |
| |
| public class DexBackedDexFile extends BaseDexBuffer implements DexFile { |
| private final Opcodes opcodes; |
| |
| private final int stringCount; |
| private final int stringStartOffset; |
| private final int typeCount; |
| private final int typeStartOffset; |
| private final int protoCount; |
| private final int protoStartOffset; |
| private final int fieldCount; |
| private final int fieldStartOffset; |
| private final int methodCount; |
| private final int methodStartOffset; |
| private final int classCount; |
| private final int classStartOffset; |
| |
| private DexBackedDexFile(Opcodes opcodes, @Nonnull byte[] buf, int offset, boolean verifyMagic) { |
| super(buf); |
| |
| this.opcodes = opcodes; |
| |
| if (verifyMagic) { |
| verifyMagicAndByteOrder(buf, offset); |
| } |
| |
| stringCount = readSmallUint(HeaderItem.STRING_COUNT_OFFSET); |
| stringStartOffset = readSmallUint(HeaderItem.STRING_START_OFFSET); |
| typeCount = readSmallUint(HeaderItem.TYPE_COUNT_OFFSET); |
| typeStartOffset = readSmallUint(HeaderItem.TYPE_START_OFFSET); |
| protoCount = readSmallUint(HeaderItem.PROTO_COUNT_OFFSET); |
| protoStartOffset = readSmallUint(HeaderItem.PROTO_START_OFFSET); |
| fieldCount = readSmallUint(HeaderItem.FIELD_COUNT_OFFSET); |
| fieldStartOffset = readSmallUint(HeaderItem.FIELD_START_OFFSET); |
| methodCount = readSmallUint(HeaderItem.METHOD_COUNT_OFFSET); |
| methodStartOffset = readSmallUint(HeaderItem.METHOD_START_OFFSET); |
| classCount = readSmallUint(HeaderItem.CLASS_COUNT_OFFSET); |
| classStartOffset = readSmallUint(HeaderItem.CLASS_START_OFFSET); |
| } |
| |
| public DexBackedDexFile(@Nonnull Opcodes opcodes, @Nonnull BaseDexBuffer buf) { |
| this(opcodes, buf.buf); |
| } |
| |
| public DexBackedDexFile(@Nonnull Opcodes opcodes, @Nonnull byte[] buf, int offset) { |
| this(opcodes, buf, offset, false); |
| } |
| |
| public DexBackedDexFile(@Nonnull Opcodes opcodes, @Nonnull byte[] buf) { |
| this(opcodes, buf, 0, true); |
| } |
| |
| public static DexBackedDexFile fromInputStream(@Nonnull Opcodes opcodes, @Nonnull InputStream is) |
| throws IOException { |
| if (!is.markSupported()) { |
| throw new IllegalArgumentException("InputStream must support mark"); |
| } |
| is.mark(44); |
| byte[] partialHeader = new byte[44]; |
| try { |
| ByteStreams.readFully(is, partialHeader); |
| } catch (EOFException ex) { |
| throw new NotADexFile("File is too short"); |
| } finally { |
| is.reset(); |
| } |
| |
| verifyMagicAndByteOrder(partialHeader, 0); |
| |
| byte[] buf = ByteStreams.toByteArray(is); |
| return new DexBackedDexFile(opcodes, buf, 0, false); |
| } |
| |
| public Opcodes getOpcodes() { |
| return opcodes; |
| } |
| |
| public boolean isOdexFile() { |
| return false; |
| } |
| |
| @Nonnull |
| @Override |
| public Set<? extends DexBackedClassDef> getClasses() { |
| return new FixedSizeSet<DexBackedClassDef>() { |
| @Nonnull |
| @Override |
| public DexBackedClassDef readItem(int index) { |
| return new DexBackedClassDef(DexBackedDexFile.this, getClassDefItemOffset(index)); |
| } |
| |
| @Override |
| public int size() { |
| return classCount; |
| } |
| }; |
| } |
| |
| private static void verifyMagicAndByteOrder(@Nonnull byte[] buf, int offset) { |
| if (!HeaderItem.verifyMagic(buf, offset)) { |
| StringBuilder sb = new StringBuilder("Invalid magic value:"); |
| for (int i=0; i<8; i++) { |
| sb.append(String.format(" %02x", buf[i])); |
| } |
| throw new NotADexFile(sb.toString()); |
| } |
| |
| int endian = HeaderItem.getEndian(buf, offset); |
| if (endian == HeaderItem.BIG_ENDIAN_TAG) { |
| throw new ExceptionWithContext("Big endian dex files are not currently supported"); |
| } |
| |
| if (endian != HeaderItem.LITTLE_ENDIAN_TAG) { |
| throw new ExceptionWithContext("Invalid endian tag: 0x%x", endian); |
| } |
| } |
| |
| public int getStringIdItemOffset(int stringIndex) { |
| if (stringIndex < 0 || stringIndex >= stringCount) { |
| throw new InvalidItemIndex(stringIndex, "String index out of bounds: %d", stringIndex); |
| } |
| return stringStartOffset + stringIndex*StringIdItem.ITEM_SIZE; |
| } |
| |
| public int getTypeIdItemOffset(int typeIndex) { |
| if (typeIndex < 0 || typeIndex >= typeCount) { |
| throw new InvalidItemIndex(typeIndex, "Type index out of bounds: %d", typeIndex); |
| } |
| return typeStartOffset + typeIndex*TypeIdItem.ITEM_SIZE; |
| } |
| |
| public int getFieldIdItemOffset(int fieldIndex) { |
| if (fieldIndex < 0 || fieldIndex >= fieldCount) { |
| throw new InvalidItemIndex(fieldIndex, "Field index out of bounds: %d", fieldIndex); |
| } |
| return fieldStartOffset + fieldIndex*FieldIdItem.ITEM_SIZE; |
| } |
| |
| public int getMethodIdItemOffset(int methodIndex) { |
| if (methodIndex < 0 || methodIndex >= methodCount) { |
| throw new InvalidItemIndex(methodIndex, "Method index out of bounds: %d", methodIndex); |
| } |
| return methodStartOffset + methodIndex*MethodIdItem.ITEM_SIZE; |
| } |
| |
| public int getProtoIdItemOffset(int protoIndex) { |
| if (protoIndex < 0 || protoIndex >= protoCount) { |
| throw new InvalidItemIndex(protoIndex, "Proto index out of bounds: %d", protoIndex); |
| } |
| return protoStartOffset + protoIndex*ProtoIdItem.ITEM_SIZE; |
| } |
| |
| public int getClassDefItemOffset(int classIndex) { |
| if (classIndex < 0 || classIndex >= classCount) { |
| throw new InvalidItemIndex(classIndex, "Class index out of bounds: %d", classIndex); |
| } |
| return classStartOffset + classIndex*ClassDefItem.ITEM_SIZE; |
| } |
| |
| public int getClassCount() { |
| return classCount; |
| } |
| |
| public int getStringCount() { |
| return stringCount; |
| } |
| |
| public int getTypeCount() { |
| return typeCount; |
| } |
| |
| public int getProtoCount() { |
| return protoCount; |
| } |
| |
| public int getFieldCount() { |
| return fieldCount; |
| } |
| |
| public int getMethodCount() { |
| return methodCount; |
| } |
| |
| @Nonnull |
| public String getString(int stringIndex) { |
| int stringOffset = getStringIdItemOffset(stringIndex); |
| int stringDataOffset = readSmallUint(stringOffset); |
| DexReader reader = readerAt(stringDataOffset); |
| int utf16Length = reader.readSmallUleb128(); |
| return reader.readString(utf16Length); |
| } |
| |
| @Nullable |
| public String getOptionalString(int stringIndex) { |
| if (stringIndex == -1) { |
| return null; |
| } |
| return getString(stringIndex); |
| } |
| |
| @Nonnull |
| public String getType(int typeIndex) { |
| int typeOffset = getTypeIdItemOffset(typeIndex); |
| int stringIndex = readSmallUint(typeOffset); |
| return getString(stringIndex); |
| } |
| |
| @Nullable |
| public String getOptionalType(int typeIndex) { |
| if (typeIndex == -1) { |
| return null; |
| } |
| return getType(typeIndex); |
| } |
| |
| @Override |
| @Nonnull |
| public DexReader readerAt(int offset) { |
| return new DexReader(this, offset); |
| } |
| |
| public static class NotADexFile extends RuntimeException { |
| public NotADexFile() { |
| } |
| |
| public NotADexFile(Throwable cause) { |
| super(cause); |
| } |
| |
| public NotADexFile(String message) { |
| super(message); |
| } |
| |
| public NotADexFile(String message, Throwable cause) { |
| super(message, cause); |
| } |
| } |
| |
| public static class InvalidItemIndex extends ExceptionWithContext { |
| private final int itemIndex; |
| |
| public InvalidItemIndex(int itemIndex) { |
| super(""); |
| this.itemIndex = itemIndex; |
| } |
| |
| public InvalidItemIndex(int itemIndex, String message, Object... formatArgs) { |
| super(message, formatArgs); |
| this.itemIndex = itemIndex; |
| } |
| |
| public int getInvalidIndex() { |
| return itemIndex; |
| } |
| } |
| } |