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546 lines
16 KiB
546 lines
16 KiB
/*
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* ClassIdentifier (c) 1998 Jochen Hoenicke
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*
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* You may distribute under the terms of the GNU General Public License.
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*
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* IN NO EVENT SHALL JOCHEN HOENICKE BE LIABLE TO ANY PARTY FOR DIRECT,
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* INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT OF
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* THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF JOCHEN HOENICKE
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* HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* JOCHEN HOENICKE SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
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* PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS ON AN "AS IS"
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* BASIS, AND JOCHEN HOENICKE HAS NO OBLIGATION TO PROVIDE MAINTENANCE,
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* SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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*
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* $Id$
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*/
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package jode.obfuscator;
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import jode.Obfuscator;
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import jode.bytecode.*;
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import java.lang.reflect.Modifier;
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import java.util.*;
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import java.io.*;
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public class ClassIdentifier extends Identifier {
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ClassBundle bundle;
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PackageIdentifier pack;
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String name;
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ClassInfo info;
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boolean willStrip;
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int preserveRule;
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int fieldCount;
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/* The first fieldCount are of type FieldIdentifier, the remaining
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* are MethodIdentifier
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*/
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Identifier[] identifiers;
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Vector knownSubClasses = new Vector();
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Vector virtualReachables = new Vector();
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public ClassIdentifier(ClassBundle bundle, PackageIdentifier pack,
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String name, ClassInfo info) {
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super(name);
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this.bundle = bundle;
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this.pack = pack;
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this.name = name;
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this.info = info;
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preserveRule = bundle.preserveRule;
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if ((preserveRule & (info.getModifiers() ^ Modifier.PRIVATE)) != 0) {
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setReachable();
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setPreserved();
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}
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}
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public void addSubClass(ClassIdentifier ci) {
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knownSubClasses.addElement(ci);
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Enumeration enum = virtualReachables.elements();
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while (enum.hasMoreElements()) {
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String[] method = (String[]) enum.nextElement();
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ci.reachableIdentifier(method[0], method[1], true);
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}
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}
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public void preserveIdentifier(String name, String typeSig) {
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for (int i=0; i< identifiers.length; i++) {
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if (identifiers[i].getName().equals(name)
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&& (typeSig == null
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|| identifiers[i].getType().equals(typeSig)))
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identifiers[i].setPreserved();
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}
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}
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public void reachableIdentifier(String name, String typeSig,
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boolean isVirtual) {
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for (int i=0; i < identifiers.length; i++) {
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if (identifiers[i].getName().equals(name)
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&& (typeSig == null
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|| identifiers[i] .getType().equals(typeSig)))
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identifiers[i].setReachable();
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}
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if (isVirtual) {
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Enumeration enum = knownSubClasses.elements();
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while (enum.hasMoreElements())
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((ClassIdentifier)enum.nextElement())
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.reachableIdentifier(name, typeSig, isVirtual);
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virtualReachables.addElement
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(new String[] { name, typeSig });
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}
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}
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public void chainIdentifier(Identifier ident) {
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String name = ident.getName();
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String typeSig = ident.getType();
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for (int i=0; i< identifiers.length; i++) {
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if (identifiers[i].getName().equals(ident.getName())
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&& (identifiers[i].getType().equals(typeSig)))
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ident.addShadow(identifiers[i]);
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}
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}
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/**
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* Preserve all fields, that are necessary, to serialize
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* a compatible class.
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*/
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public void preserveSerializable() {
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/*XXX*/
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/* add a field serializableVersionUID if not existent */
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}
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public void initSuperClasses(ClassInfo superclass) {
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while (superclass != null) {
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if (superclass.getName().equals("java.lang.Serializable"))
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preserveSerializable();
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ClassIdentifier superident = (ClassIdentifier)
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bundle.getIdentifier(superclass.getName());
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if (superident != null) {
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for (int i=superident.fieldCount;
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i < superident.identifiers.length; i++) {
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MethodIdentifier mid = (MethodIdentifier)
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superident.identifiers[i];
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// all virtual methods in superclass must be chained.
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int modif = mid.info.getModifiers();
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if (((Modifier.PRIVATE
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| Modifier.STATIC
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| Modifier.FINAL) & modif) == 0
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&& !(mid.getName().equals("<init>"))) {
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// chain the preserved/same name lists.
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chainIdentifier(superident.identifiers[i]);
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}
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}
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} else {
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// all methods and fields in superclass are preserved!
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MethodInfo[] topmethods = superclass.getMethods();
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FieldInfo[] topfields = superclass.getFields();
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for (int i=0; i< topmethods.length; i++) {
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// all virtual methods in superclass may be
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// virtually reachable
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int modif = topmethods[i].getModifiers();
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if (((Modifier.PRIVATE | Modifier.STATIC | Modifier.FINAL)
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& modif) == 0
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&& !topmethods[i].getName().equals("<init>")) {
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reachableIdentifier
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(topmethods[i].getName(),
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topmethods[i].getType().getTypeSignature(),
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true);
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preserveIdentifier
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(topmethods[i].getName(),
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topmethods[i].getType().getTypeSignature());
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}
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}
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}
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ClassInfo[] ifaces = superclass.getInterfaces();
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for (int i=0; i < ifaces.length; i++)
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initSuperClasses(ifaces[i]);
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superclass = superclass.getSuperclass();
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}
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}
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public void setSingleReachable() {
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super.setSingleReachable();
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if (Obfuscator.isVerbose)
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Obfuscator.err.println("Reachable: "+this);
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reachableIdentifier("<clinit>", "()V", false);
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}
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public void initClass() {
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info.loadInfo(info.FULLINFO);
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FieldInfo[] finfos = info.getFields();
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MethodInfo[] minfos = info.getMethods();
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fieldCount = finfos.length;
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identifiers = new Identifier[finfos.length + minfos.length];
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for (int i=0; i< fieldCount; i++) {
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identifiers[i] = new FieldIdentifier(this, finfos[i]);
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if ((preserveRule & (finfos[i].getModifiers() ^ Modifier.PRIVATE))
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!= 0) {
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identifiers[i].setReachable();
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identifiers[i].setPreserved();
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}
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}
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for (int i=0; i< minfos.length; i++) {
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identifiers[fieldCount + i]
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= new MethodIdentifier(this, minfos[i]);
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if ((preserveRule & (minfos[i].getModifiers() ^ Modifier.PRIVATE))
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!= 0) {
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identifiers[i].setReachable();
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identifiers[i].setPreserved();
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}
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if (identifiers[i].getName().equals("<init>"))
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identifiers[i].setPreserved();
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}
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ClassInfo[] ifaces = info.getInterfaces();
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for (int i=0; i < ifaces.length; i++) {
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ClassIdentifier ifaceident = (ClassIdentifier)
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bundle.getIdentifier(ifaces[i].getName());
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if (ifaceident != null) {
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ifaceident.addSubClass(this);
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}
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initSuperClasses(ifaces[i]);
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}
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if (info.getSuperclass() != null) {
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ClassIdentifier superident = (ClassIdentifier)
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bundle.getIdentifier(info.getSuperclass().getName());
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if (superident != null) {
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superident.addSubClass(this);
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}
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initSuperClasses(info.getSuperclass());
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}
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preserveIdentifier("<clinit>", "()V");
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preserveIdentifier("<init>", null);
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}
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public void strip() {
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willStrip = true;
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if (Obfuscator.isDebugging) {
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for (int i=0; i < identifiers.length; i++) {
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if (!identifiers[i].isReachable())
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Obfuscator.err.println(identifiers[i].toString()
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+ " is stripped");
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}
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}
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}
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public void buildTable(int renameRule) {
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super.buildTable(renameRule);
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for (int i=0; i < identifiers.length; i++)
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if (!willStrip || identifiers[i].isReachable())
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identifiers[i].buildTable(renameRule);
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}
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public void writeTable(PrintWriter out) throws IOException {
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if (getName() != getAlias())
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out.println("" + getFullAlias() + " = " + getName());
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for (int i=0; i < identifiers.length; i++)
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if (!willStrip || identifiers[i].isReachable())
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identifiers[i].writeTable(out);
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}
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public void addIfaces(Vector result, ClassInfo[] ifaces) {
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for (int i=0; i < ifaces.length; i++) {
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ClassIdentifier ifaceident = (ClassIdentifier)
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bundle.getIdentifier(ifaces[i].getName());
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if (ifaceident != null) {
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if (ifaceident.isReachable())
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result.addElement(ifaceident.getFullAlias());
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else
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addIfaces(result, ifaceident.info.getInterfaces());
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} else
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result.addElement(ifaces[i].getName());
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}
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}
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/**
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* Generates the new super class and interfaces, removing super
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* classes and interfaces that are not reachable.
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* @return an array of class names (full qualified, dot separated)
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* where the first entry is the super class (may be null) and the
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* other entries are the interfaces.
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*/
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public String[] getSuperIfaces() {
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/* First generate Ifaces and superclass infos */
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Vector newSuperIfaces = new Vector();
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addIfaces(newSuperIfaces, info.getInterfaces());
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String superName = null;
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ClassInfo superClass = info.getSuperclass();
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while (superClass != null) {
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ClassIdentifier superident = (ClassIdentifier)
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bundle.getIdentifier(superClass.getName());
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if (superident != null) {
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if (superident.isReachable()) {
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superName = superident.getFullAlias();
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break;
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} else {
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addIfaces(newSuperIfaces, superClass.getInterfaces());
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superClass = superClass.getSuperclass();
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}
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} else {
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superName = superClass.getName();
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break;
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}
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}
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newSuperIfaces.insertElementAt(superName, 0);
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String[] result = new String[newSuperIfaces.size()];
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newSuperIfaces.copyInto(result);
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return result;
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}
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public void storeClass(DataOutputStream out) throws IOException {
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GrowableConstantPool gcp = new GrowableConstantPool();
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for (int i=fieldCount; i < identifiers.length; i++)
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if (!willStrip || identifiers[i].isReachable())
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((MethodIdentifier)identifiers[i]).reserveSmallConstants(gcp);
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int[] hierarchyInts;
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{
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String[] hierarchy = getSuperIfaces();
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hierarchyInts = new int[hierarchy.length];
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for (int i=0; i< hierarchy.length; i++) {
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if (hierarchy[i] != null)
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hierarchyInts[i] = gcp.putClassRef(hierarchy[i]);
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else
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hierarchyInts[i] = 0;
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}
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hierarchy = null;
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}
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int nameIndex = gcp.putClassRef(getFullAlias());
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int fields = 0;
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int methods = 0;
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for (int i=0; i<fieldCount; i++) {
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if (!willStrip || identifiers[i].isReachable()) {
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((FieldIdentifier)identifiers[i]).fillConstantPool(gcp);
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fields++;
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}
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}
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for (int i=fieldCount; i < identifiers.length; i++) {
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if (!willStrip || identifiers[i].isReachable()) {
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((MethodIdentifier)identifiers[i]).fillConstantPool(gcp);
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methods++;
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}
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}
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out.writeInt(0xcafebabe);
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out.writeShort(3);
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out.writeShort(45);
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gcp.write(out);
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out.writeShort(info.getModifiers());
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out.writeShort(nameIndex);
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out.writeShort(hierarchyInts[0]);
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out.writeShort(hierarchyInts.length-1);
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for (int i=1; i<hierarchyInts.length; i++)
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out.writeShort(hierarchyInts[i]);
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out.writeShort(fields);
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for (int i=0; i<fieldCount; i++)
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if (!willStrip || identifiers[i].isReachable())
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((FieldIdentifier)identifiers[i]).write(out);
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out.writeShort(methods);
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for (int i=fieldCount; i < identifiers.length; i++)
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if (!willStrip || identifiers[i].isReachable())
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((MethodIdentifier)identifiers[i]).write(out);
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out.writeShort(0); // no attributes;
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}
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public Identifier getParent() {
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return pack;
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}
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/**
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* @return the full qualified name, excluding trailing dot.
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*/
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public String getFullName() {
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return pack.getFullName() + getName();
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}
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/**
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* @return the full qualified alias, excluding trailing dot.
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*/
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public String getFullAlias() {
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return pack.getFullAlias() + getAlias();
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}
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public String getName() {
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return name;
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}
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public String getType() {
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return "Ljava/lang/Class;";
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}
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public String toString() {
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return "ClassIdentifier "+getFullName();
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}
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public Identifier getIdentifier(String fieldName, String typeSig) {
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for (int i=0; i < identifiers.length; i++) {
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if (identifiers[i].getName().equals(fieldName)
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&& identifiers[i].getType().startsWith(typeSig))
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return identifiers[i];
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}
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ClassInfo[] ifaces = info.getInterfaces();
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for (int i=0; i < ifaces.length; i++) {
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ClassIdentifier ifaceident = (ClassIdentifier)
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bundle.getIdentifier(ifaces[i].getName());
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if (ifaceident != null) {
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Identifier ident
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= ifaceident.getIdentifier(fieldName, typeSig);
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if (ident != null)
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return ident;
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}
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}
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if (info.getSuperclass() != null) {
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ClassIdentifier superident = (ClassIdentifier)
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bundle.getIdentifier(info.getSuperclass().getName());
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if (superident != null) {
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Identifier ident
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= superident.getIdentifier(fieldName, typeSig);
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if (ident != null)
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return ident;
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}
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}
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return null;
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}
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public static boolean containFieldAlias(ClassInfo clazz,
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String fieldName, String typeSig) {
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FieldInfo[] finfos = clazz.getFields();
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for (int i=0; i< finfos.length; i++) {
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if (finfos[i].getName().equals(fieldName)
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&& finfos[i].getType().getTypeSignature().startsWith(typeSig))
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return true;
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}
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ClassInfo[] ifaces = clazz.getInterfaces();
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for (int i=0; i < ifaces.length; i++) {
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if (containFieldAlias(ifaces[i], fieldName, typeSig))
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return true;
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}
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if (clazz.getSuperclass() != null) {
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if (containFieldAlias(clazz.getSuperclass(),
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fieldName, typeSig))
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return true;
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}
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return false;
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}
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public boolean containFieldAlias(String fieldName, String typeSig) {
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for (int i=0; i < fieldCount; i++) {
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if ((!willStrip || identifiers[i].isReachable())
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&& identifiers[i].getAlias().equals(fieldName)
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&& identifiers[i].getType().startsWith(typeSig))
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return true;
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}
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ClassInfo[] ifaces = info.getInterfaces();
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for (int i=0; i < ifaces.length; i++) {
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ClassIdentifier ifaceident = (ClassIdentifier)
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bundle.getIdentifier(ifaces[i].getName());
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if (ifaceident != null) {
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if (ifaceident.containFieldAlias(fieldName, typeSig))
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return true;
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} else {
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if (containFieldAlias(ifaces[i], fieldName, typeSig))
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return true;
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}
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}
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|
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if (info.getSuperclass() != null) {
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ClassIdentifier superident = (ClassIdentifier)
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bundle.getIdentifier(info.getSuperclass().getName());
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if (superident != null) {
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if (superident.containFieldAlias(fieldName, typeSig))
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return true;
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} else {
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if (containFieldAlias(info.getSuperclass(),
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fieldName, typeSig))
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return true;
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}
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}
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return false;
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}
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public static Object getMethod(ClassInfo clazz,
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String methodName, String paramType) {
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MethodInfo[] minfos = clazz.getMethods();
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for (int i=0; i< minfos.length; i++) {
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if (minfos[i].getName().equals(methodName)
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&& minfos[i].getType().getTypeSignature()
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.startsWith(paramType))
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return minfos[i];
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}
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ClassInfo[] ifaces = clazz.getInterfaces();
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for (int i=0; i < ifaces.length; i++) {
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Object result = getMethod(ifaces[i], methodName, paramType);
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if (result != null)
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return result;
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}
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if (clazz.getSuperclass() != null) {
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Object result = getMethod(clazz.getSuperclass(),
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methodName, paramType);
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if (result != null)
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return result;
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}
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return null;
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}
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public Object getMethod(String methodName, String paramType) {
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for (int i=fieldCount; i< identifiers.length; i++) {
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if ((!willStrip || identifiers[i].isReachable())
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&& identifiers[i].getAlias().equals(methodName)
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&& identifiers[i].getType().startsWith(paramType))
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return identifiers[i];
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}
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ClassInfo[] ifaces = info.getInterfaces();
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for (int i=0; i < ifaces.length; i++) {
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ClassIdentifier ifaceident = (ClassIdentifier)
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bundle.getIdentifier(ifaces[i].getName());
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if (ifaceident != null) {
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Object result = ifaceident.getMethod(methodName, paramType);
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if (result != null)
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return result;
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} else {
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Object result = getMethod(ifaces[i], methodName, paramType);
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if (result != null)
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return result;
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}
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}
|
|
|
|
if (info.getSuperclass() != null) {
|
|
ClassIdentifier superident = (ClassIdentifier)
|
|
bundle.getIdentifier(info.getSuperclass().getName());
|
|
if (superident != null) {
|
|
Object result = superident.getMethod(methodName, paramType);
|
|
if (result != null)
|
|
return result;
|
|
} else {
|
|
Object result = getMethod(info.getSuperclass(),
|
|
methodName, paramType);
|
|
if (result != null)
|
|
return result;
|
|
}
|
|
}
|
|
return null;
|
|
}
|
|
|
|
public boolean conflicting(String newAlias) {
|
|
return pack.contains(newAlias);
|
|
}
|
|
}
|
|
|
|
|