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73a63516fc
git-svn-id: https://smali.googlecode.com/svn/trunk@431 55b6fa8a-2a1e-11de-a435-ffa8d773f76a
243 lines
9.1 KiB
Java
243 lines
9.1 KiB
Java
/*
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* [The "BSD licence"]
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* Copyright (c) 2009 Ben Gruver
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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package org.jf.dexlib;
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import org.jf.dexlib.Util.AnnotatedOutput;
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import org.jf.dexlib.Util.Input;
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import org.jf.dexlib.Util.Utf8Utils;
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import java.io.UnsupportedEncodingException;
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public class HeaderItem extends Item<HeaderItem> {
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/**
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* the file format magic number, represented as the
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* low-order bytes of a string
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*/
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public static final String MAGIC = "dex\n035" + '\0';
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/** size of this section, in bytes */
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private static final int HEADER_SIZE = 0x70;
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/** the endianness constants */
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private static final int LITTLE_ENDIAN = 0x12345678;
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private static final int BIG_ENDIAN = 0x78562312;
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/**
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* Create a new uninitialized <code>HeaderItem</code>
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* @param dexFile The <code>DexFile</code> containing this <code>HeaderItem</code>
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*/
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protected HeaderItem(final DexFile dexFile) {
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super(dexFile);
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}
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/** {@inheritDoc} */
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protected void readItem(Input in, ReadContext readContext) {
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byte[] expectedMagic;
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try {
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expectedMagic = MAGIC.getBytes("US-ASCII");
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} catch (UnsupportedEncodingException ex) {
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throw new RuntimeException(ex);
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}
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byte[] readMagic = in.readBytes(8);
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for (int i=0; i<8; i++) {
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if (expectedMagic[i] != readMagic[i]) {
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throw new RuntimeException("The magic value is not the expected value");
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}
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}
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in.readBytes(20); //checksum
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in.readInt(); //signature
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in.readInt(); //filesize
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if (in.readInt() != HEADER_SIZE) {
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throw new RuntimeException("The header size is not the expected value (0x70)");
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}
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int endianTag = in.readInt();
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if (endianTag == BIG_ENDIAN) {
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throw new RuntimeException("This dex file is big endian. Only little endian is currently supported.");
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} else if (endianTag != LITTLE_ENDIAN) {
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throw new RuntimeException("The endian tag is not 0x12345678 or 0x78563412");
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}
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//link_size
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if (in.readInt() != 0) {
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throw new RuntimeException("This dex file has a link section, which is not supported");
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}
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//link_off
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if (in.readInt() != 0) {
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throw new RuntimeException("This dex file has a link section, which is not supported");
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}
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int sectionSize;
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int sectionOffset;
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//map_offset
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sectionOffset = in.readInt();
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readContext.addSection(ItemType.TYPE_MAP_LIST, 1, sectionOffset);
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//string_id_item
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sectionSize = in.readInt();
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sectionOffset = in.readInt();
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readContext.addSection(ItemType.TYPE_STRING_ID_ITEM, sectionSize, sectionOffset);
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//type_id_item
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sectionSize = in.readInt();
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sectionOffset = in.readInt();
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readContext.addSection(ItemType.TYPE_TYPE_ID_ITEM, sectionSize, sectionOffset);
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//proto_id_item
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sectionSize = in.readInt();
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sectionOffset = in.readInt();
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readContext.addSection(ItemType.TYPE_PROTO_ID_ITEM, sectionSize, sectionOffset);
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//field_id_item
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sectionSize = in.readInt();
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sectionOffset = in.readInt();
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readContext.addSection(ItemType.TYPE_FIELD_ID_ITEM, sectionSize, sectionOffset);
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//method_id_item
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sectionSize = in.readInt();
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sectionOffset = in.readInt();
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readContext.addSection(ItemType.TYPE_METHOD_ID_ITEM, sectionSize, sectionOffset);
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//class_data_item
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sectionSize = in.readInt();
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sectionOffset = in.readInt();
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readContext.addSection(ItemType.TYPE_CLASS_DEF_ITEM, sectionSize, sectionOffset);
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in.readInt(); //data_size
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in.readInt(); //data_off
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}
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/** {@inheritDoc} */
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protected int placeItem(int offset) {
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return HEADER_SIZE;
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}
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/** {@inheritDoc} */
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protected void writeItem(AnnotatedOutput out) {
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byte[] magic;
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try {
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magic = MAGIC.getBytes("US-ASCII");
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} catch (UnsupportedEncodingException ex) {
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throw new RuntimeException(ex);
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}
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out.annotate("magic: " + Utf8Utils.escapeString(MAGIC));
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out.write(magic);
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out.annotate("checksum");
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out.writeInt(0);
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out.annotate("signature");
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out.write(new byte[20]);
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out.annotate("file_size: 0x" + Integer.toHexString(dexFile.getFileSize()) + " (" + dexFile.getFileSize() +
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" bytes)");
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out.writeInt(dexFile.getFileSize());
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out.annotate("header_size: 0x" + Integer.toHexString(HEADER_SIZE));
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out.writeInt(HEADER_SIZE);
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out.annotate("endian_tag: 0x" + Integer.toHexString(LITTLE_ENDIAN));
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out.writeInt(LITTLE_ENDIAN);
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out.annotate("link_size: 0");
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out.writeInt(0);
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out.annotate("link_off: 0");
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out.writeInt(0);
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out.annotate("map_off: 0x" + Integer.toHexString(dexFile.MapItem.getOffset()));
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out.writeInt(dexFile.MapItem.getOffset());
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out.annotate("string_ids_size: " + dexFile.StringIdsSection.getItems().size());
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out.writeInt(dexFile.StringIdsSection.getItems().size());
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out.annotate("string_ids_off: 0x" + Integer.toHexString(dexFile.StringIdsSection.getOffset()));
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out.writeInt(dexFile.StringIdsSection.getOffset());
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out.annotate("type_ids_size: " + dexFile.TypeIdsSection.getItems().size());
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out.writeInt(dexFile.TypeIdsSection.getItems().size());
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out.annotate("type_ids_off: 0x" + Integer.toHexString(dexFile.TypeIdsSection.getOffset()));
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out.writeInt(dexFile.TypeIdsSection.getOffset());
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out.annotate("proto_ids_size: " + dexFile.ProtoIdsSection.getItems().size());
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out.writeInt(dexFile.ProtoIdsSection.getItems().size());
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out.annotate("proto_ids_off: 0x" + Integer.toHexString(dexFile.ProtoIdsSection.getOffset()));
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out.writeInt(dexFile.ProtoIdsSection.getOffset());
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out.annotate("field_ids_size: " + dexFile.FieldIdsSection.getItems().size());
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out.writeInt(dexFile.FieldIdsSection.getItems().size());
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out.annotate("field_ids_off: 0x" + Integer.toHexString(dexFile.FieldIdsSection.getOffset()));
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out.writeInt(dexFile.FieldIdsSection.getOffset());
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out.annotate("method_ids_size: " + dexFile.MethodIdsSection.getItems().size());
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out.writeInt(dexFile.MethodIdsSection.getItems().size());
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out.annotate("method_ids_off: 0x" + Integer.toHexString(dexFile.MethodIdsSection.getOffset()));
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out.writeInt(dexFile.MethodIdsSection.getOffset());
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out.annotate("class_defs_size: " + dexFile.ClassDefsSection.getItems().size());
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out.writeInt(dexFile.ClassDefsSection.getItems().size());
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out.annotate("class_defs_off: 0x" + Integer.toHexString(dexFile.ClassDefsSection.getOffset()));
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out.writeInt(dexFile.ClassDefsSection.getOffset());
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out.annotate("data_size: 0x" + Integer.toHexString(dexFile.getDataSize()) + " (" + dexFile.getDataSize() +
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" bytes)");
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out.writeInt(dexFile.getDataSize());
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out.annotate("data_off: 0x" + Integer.toHexString(dexFile.getDataOffset()));
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out.writeInt(dexFile.getDataOffset());
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}
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/** {@inheritDoc} */
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public ItemType getItemType() {
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return ItemType.TYPE_HEADER_ITEM;
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}
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/** {@inheritDoc} */
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public String getConciseIdentity() {
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return "header_item";
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}
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/** {@inheritDoc} */
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public int compareTo(HeaderItem o) {
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//there is only 1 header item
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return 0;
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}
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}
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