1b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato/* 2b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * ProGuard -- shrinking, optimization, obfuscation, and preverification 3b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * of Java bytecode. 4b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * 5b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * Copyright (c) 2002-2009 Eric Lafortune (eric@graphics.cornell.edu) 6b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * 7b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * This program is free software; you can redistribute it and/or modify it 8b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * under the terms of the GNU General Public License as published by the Free 9b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * Software Foundation; either version 2 of the License, or (at your option) 10b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * any later version. 11b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * 12b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * This program is distributed in the hope that it will be useful, but WITHOUT 13b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 14b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 15b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * more details. 16b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * 17b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * You should have received a copy of the GNU General Public License along 18b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * with this program; if not, write to the Free Software Foundation, Inc., 19b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 20b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato */ 21b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onoratopackage proguard.obfuscate; 22b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 23b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onoratoimport proguard.classfile.*; 24b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onoratoimport proguard.classfile.constant.ClassConstant; 25b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onoratoimport proguard.classfile.constant.visitor.ConstantVisitor; 26b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onoratoimport proguard.classfile.editor.ConstantPoolEditor; 27b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onoratoimport proguard.classfile.util.SimplifiedVisitor; 28b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onoratoimport proguard.classfile.visitor.*; 29b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 30b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato/** 31b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * This <code>ClassVisitor</code> renames the class names and class member 32b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * names of the classes it visits, using names previously determined by the 33b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * obfuscator. 34b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * 35b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * @see ClassObfuscator 36b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * @see MemberObfuscator 37b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * 38b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * @author Eric Lafortune 39b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato */ 40b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onoratopublic class ClassRenamer 41b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onoratoextends SimplifiedVisitor 42b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onoratoimplements ClassVisitor, 43b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato MemberVisitor, 44b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato ConstantVisitor 45b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato{ 46b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato // Implementations for ClassVisitor. 47b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 48b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato public void visitProgramClass(ProgramClass programClass) 49b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato { 50b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato // Rename this class. 51b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato programClass.thisClassConstantAccept(this); 52b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 53b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato // Rename the class members. 54b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato programClass.fieldsAccept(this); 55b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato programClass.methodsAccept(this); 56b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato } 57b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 58b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 59b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato public void visitLibraryClass(LibraryClass libraryClass) 60b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato { 61b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato libraryClass.thisClassName = ClassObfuscator.newClassName(libraryClass); 62b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 63b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato // Rename the class members. 64b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato libraryClass.fieldsAccept(this); 65b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato libraryClass.methodsAccept(this); 66b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato } 67b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 68b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 69b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato // Implementations for MemberVisitor. 70b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 71b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato public void visitProgramMember(ProgramClass programClass, 72b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato ProgramMember programMember) 73b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato { 74b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato // Has the class member name changed? 75b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato String name = programMember.getName(programClass); 76b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato String newName = MemberObfuscator.newMemberName(programMember); 77b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato if (newName != null && 78b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato !newName.equals(name)) 79b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato { 80b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato programMember.u2nameIndex = 81b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato new ConstantPoolEditor(programClass).addUtf8Constant(newName); 82b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato } 83b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato } 84b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 85b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato public void visitLibraryMember(LibraryClass libraryClass, 86b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato LibraryMember libraryMember) 87b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato { 88b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato String newName = MemberObfuscator.newMemberName(libraryMember); 89b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato if (newName != null) 90b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato { 91b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato libraryMember.name = newName; 92b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato } 93b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato } 94b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 95b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 96b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato // Implementations for ConstantVisitor. 97b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 98b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato public void visitClassConstant(Clazz clazz, ClassConstant classConstant) 99b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato { 100b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato // Update the Class entry if required. 101b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato String newName = ClassObfuscator.newClassName(clazz); 102b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato if (newName != null) 103b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato { 104b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato // Refer to a new Utf8 entry. 105b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato classConstant.u2nameIndex = 106b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato new ConstantPoolEditor((ProgramClass)clazz).addUtf8Constant(newName); 107b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato } 108b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato } 109b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato} 110