diff options
Diffstat (limited to 'src/proguard/obfuscate/Obfuscator.java')
| -rw-r--r-- | src/proguard/obfuscate/Obfuscator.java | 475 |
1 files changed, 0 insertions, 475 deletions
diff --git a/src/proguard/obfuscate/Obfuscator.java b/src/proguard/obfuscate/Obfuscator.java deleted file mode 100644 index b2758a7..0000000 --- a/src/proguard/obfuscate/Obfuscator.java +++ /dev/null @@ -1,475 +0,0 @@ -/* - * ProGuard -- shrinking, optimization, obfuscation, and preverification - * of Java bytecode. - * - * Copyright (c) 2002-2014 Eric Lafortune (eric@graphics.cornell.edu) - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the Free - * Software Foundation; either version 2 of the License, or (at your option) - * any later version. - * - * This program is distributed in the hope that it will be useful, but WITHOUT - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for - * more details. - * - * You should have received a copy of the GNU General Public License along - * with this program; if not, write to the Free Software Foundation, Inc., - * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - */ -package proguard.obfuscate; - -import proguard.*; -import proguard.classfile.*; -import proguard.classfile.attribute.visitor.*; -import proguard.classfile.constant.visitor.AllConstantVisitor; -import proguard.classfile.editor.*; -import proguard.classfile.util.*; -import proguard.classfile.visitor.*; -import proguard.util.*; - -import java.io.*; -import java.util.*; - -/** - * This class can perform obfuscation of class pools according to a given - * specification. - * - * @author Eric Lafortune - */ -public class Obfuscator -{ - private final Configuration configuration; - - - /** - * Creates a new Obfuscator. - */ - public Obfuscator(Configuration configuration) - { - this.configuration = configuration; - } - - - /** - * Performs obfuscation of the given program class pool. - */ - public void execute(ClassPool programClassPool, - ClassPool libraryClassPool) throws IOException - { - // Check if we have at least some keep commands. - if (configuration.keep == null && - configuration.applyMapping == null && - configuration.printMapping == null) - { - throw new IOException("You have to specify '-keep' options for the obfuscation step."); - } - - // Clean up any old visitor info. - programClassPool.classesAccept(new ClassCleaner()); - libraryClassPool.classesAccept(new ClassCleaner()); - - // If the class member names have to correspond globally, - // link all class members in all classes, otherwise - // link all non-private methods in all class hierarchies. - ClassVisitor memberInfoLinker = - configuration.useUniqueClassMemberNames ? - (ClassVisitor)new AllMemberVisitor(new MethodLinker()) : - (ClassVisitor)new BottomClassFilter(new MethodLinker()); - - programClassPool.classesAccept(memberInfoLinker); - libraryClassPool.classesAccept(memberInfoLinker); - - // Create a visitor for marking the seeds. - NameMarker nameMarker = new NameMarker(); - ClassPoolVisitor classPoolvisitor = - ClassSpecificationVisitorFactory.createClassPoolVisitor(configuration.keep, - nameMarker, - nameMarker, - false, - false, - true); - // Mark the seeds. - programClassPool.accept(classPoolvisitor); - libraryClassPool.accept(classPoolvisitor); - - // All library classes and library class members keep their names. - libraryClassPool.classesAccept(nameMarker); - libraryClassPool.classesAccept(new AllMemberVisitor(nameMarker)); - - // We also keep the names of all methods of classes that are returned - // by dynamic method invocations. They may return dynamic - // implementations of interfaces. The method names then have to match - // with the invoke dynamic names. - programClassPool.classesAccept( - new ClassVersionFilter(ClassConstants.CLASS_VERSION_1_7, - new AllConstantVisitor( - new DynamicReturnedClassVisitor( - new AllMemberVisitor(nameMarker))))); - - // Mark attributes that have to be kept. - AttributeVisitor attributeUsageMarker = - new NonEmptyAttributeFilter( - new AttributeUsageMarker()); - - AttributeVisitor optionalAttributeUsageMarker = - configuration.keepAttributes == null ? null : - new AttributeNameFilter(configuration.keepAttributes, - attributeUsageMarker); - - programClassPool.classesAccept( - new AllAttributeVisitor(true, - new RequiredAttributeFilter(attributeUsageMarker, - optionalAttributeUsageMarker))); - - // Keep parameter names and types if specified. - if (configuration.keepParameterNames) - { - programClassPool.classesAccept( - new AllMethodVisitor( - new MemberNameFilter( - new AllAttributeVisitor(true, - new ParameterNameMarker(attributeUsageMarker))))); - } - - // Remove the attributes that can be discarded. Note that the attributes - // may only be discarded after the seeds have been marked, since the - // configuration may rely on annotations. - programClassPool.classesAccept(new AttributeShrinker()); - - // Apply the mapping, if one has been specified. The mapping can - // override the names of library classes and of library class members. - if (configuration.applyMapping != null) - { - WarningPrinter warningPrinter = new WarningPrinter(System.err, configuration.warn); - - MappingReader reader = new MappingReader(configuration.applyMapping); - - MappingProcessor keeper = - new MultiMappingProcessor(new MappingProcessor[] - { - new MappingKeeper(programClassPool, warningPrinter), - new MappingKeeper(libraryClassPool, null), - }); - - reader.pump(keeper); - - // Print out a summary of the warnings if necessary. - int warningCount = warningPrinter.getWarningCount(); - if (warningCount > 0) - { - System.err.println("Warning: there were " + warningCount + - " kept classes and class members that were remapped anyway."); - System.err.println(" You should adapt your configuration or edit the mapping file."); - - if (!configuration.ignoreWarnings) - { - System.err.println(" If you are sure this remapping won't hurt, you could try your luck"); - System.err.println(" using the '-ignorewarnings' option."); - } - - System.err.println(" (http://proguard.sourceforge.net/manual/troubleshooting.html#mappingconflict1)"); - - if (!configuration.ignoreWarnings) - { - throw new IOException("Please correct the above warnings first."); - } - } - } - - // Come up with new names for all classes. - DictionaryNameFactory classNameFactory = configuration.classObfuscationDictionary != null ? - new DictionaryNameFactory(configuration.classObfuscationDictionary, null) : - null; - - DictionaryNameFactory packageNameFactory = configuration.packageObfuscationDictionary != null ? - new DictionaryNameFactory(configuration.packageObfuscationDictionary, null) : - null; - - programClassPool.classesAccept( - new ClassObfuscator(programClassPool, - classNameFactory, - packageNameFactory, - configuration.useMixedCaseClassNames, - configuration.keepPackageNames, - configuration.flattenPackageHierarchy, - configuration.repackageClasses, - configuration.allowAccessModification)); - - // Come up with new names for all class members. - NameFactory nameFactory = new SimpleNameFactory(); - - if (configuration.obfuscationDictionary != null) - { - nameFactory = new DictionaryNameFactory(configuration.obfuscationDictionary, - nameFactory); - } - - WarningPrinter warningPrinter = new WarningPrinter(System.err, configuration.warn); - - // Maintain a map of names to avoid [descriptor - new name - old name]. - Map descriptorMap = new HashMap(); - - // Do the class member names have to be globally unique? - if (configuration.useUniqueClassMemberNames) - { - // Collect all member names in all classes. - programClassPool.classesAccept( - new AllMemberVisitor( - new MemberNameCollector(configuration.overloadAggressively, - descriptorMap))); - - // Assign new names to all members in all classes. - programClassPool.classesAccept( - new AllMemberVisitor( - new MemberObfuscator(configuration.overloadAggressively, - nameFactory, - descriptorMap))); - } - else - { - // Come up with new names for all non-private class members. - programClassPool.classesAccept( - new MultiClassVisitor(new ClassVisitor[] - { - // Collect all private member names in this class and down - // the hierarchy. - new ClassHierarchyTraveler(true, false, false, true, - new AllMemberVisitor( - new MemberAccessFilter(ClassConstants.ACC_PRIVATE, 0, - new MemberNameCollector(configuration.overloadAggressively, - descriptorMap)))), - - // Collect all non-private member names anywhere in the hierarchy. - new ClassHierarchyTraveler(true, true, true, true, - new AllMemberVisitor( - new MemberAccessFilter(0, ClassConstants.ACC_PRIVATE, - new MemberNameCollector(configuration.overloadAggressively, - descriptorMap)))), - - // Assign new names to all non-private members in this class. - new AllMemberVisitor( - new MemberAccessFilter(0, ClassConstants.ACC_PRIVATE, - new MemberObfuscator(configuration.overloadAggressively, - nameFactory, - descriptorMap))), - - // Clear the collected names. - new MapCleaner(descriptorMap) - })); - - // Come up with new names for all private class members. - programClassPool.classesAccept( - new MultiClassVisitor(new ClassVisitor[] - { - // Collect all member names in this class. - new AllMemberVisitor( - new MemberNameCollector(configuration.overloadAggressively, - descriptorMap)), - - // Collect all non-private member names higher up the hierarchy. - new ClassHierarchyTraveler(false, true, true, false, - new AllMemberVisitor( - new MemberAccessFilter(0, ClassConstants.ACC_PRIVATE, - new MemberNameCollector(configuration.overloadAggressively, - descriptorMap)))), - - // Collect all member names from interfaces of abstract - // classes down the hierarchy. - // Due to an error in the JLS/JVMS, virtual invocations - // may end up at a private method otherwise (Sun/Oracle - // bugs #6691741 and #6684387, ProGuard bug #3471941, - // and ProGuard test #1180). - new ClassHierarchyTraveler(false, false, false, true, - new ClassAccessFilter(ClassConstants.ACC_ABSTRACT, 0, - new ClassHierarchyTraveler(false, false, true, false, - new AllMemberVisitor( - new MemberNameCollector(configuration.overloadAggressively, - descriptorMap))))), - - // Assign new names to all private members in this class. - new AllMemberVisitor( - new MemberAccessFilter(ClassConstants.ACC_PRIVATE, 0, - new MemberObfuscator(configuration.overloadAggressively, - nameFactory, - descriptorMap))), - - // Clear the collected names. - new MapCleaner(descriptorMap) - })); - } - - // Some class members may have ended up with conflicting names. - // Come up with new, globally unique names for them. - NameFactory specialNameFactory = - new SpecialNameFactory(new SimpleNameFactory()); - - // Collect a map of special names to avoid - // [descriptor - new name - old name]. - Map specialDescriptorMap = new HashMap(); - - programClassPool.classesAccept( - new AllMemberVisitor( - new MemberSpecialNameFilter( - new MemberNameCollector(configuration.overloadAggressively, - specialDescriptorMap)))); - - libraryClassPool.classesAccept( - new AllMemberVisitor( - new MemberSpecialNameFilter( - new MemberNameCollector(configuration.overloadAggressively, - specialDescriptorMap)))); - - // Replace conflicting non-private member names with special names. - programClassPool.classesAccept( - new MultiClassVisitor(new ClassVisitor[] - { - // Collect all private member names in this class and down - // the hierarchy. - new ClassHierarchyTraveler(true, false, false, true, - new AllMemberVisitor( - new MemberAccessFilter(ClassConstants.ACC_PRIVATE, 0, - new MemberNameCollector(configuration.overloadAggressively, - descriptorMap)))), - - // Collect all non-private member names in this class and - // higher up the hierarchy. - new ClassHierarchyTraveler(true, true, true, false, - new AllMemberVisitor( - new MemberAccessFilter(0, ClassConstants.ACC_PRIVATE, - new MemberNameCollector(configuration.overloadAggressively, - descriptorMap)))), - - // Assign new names to all conflicting non-private members - // in this class and higher up the hierarchy. - new ClassHierarchyTraveler(true, true, true, false, - new AllMemberVisitor( - new MemberAccessFilter(0, ClassConstants.ACC_PRIVATE, - new MemberNameConflictFixer(configuration.overloadAggressively, - descriptorMap, - warningPrinter, - new MemberObfuscator(configuration.overloadAggressively, - specialNameFactory, - specialDescriptorMap))))), - - // Clear the collected names. - new MapCleaner(descriptorMap) - })); - - // Replace conflicting private member names with special names. - // This is only possible if those names were kept or mapped. - programClassPool.classesAccept( - new MultiClassVisitor(new ClassVisitor[] - { - // Collect all member names in this class. - new AllMemberVisitor( - new MemberNameCollector(configuration.overloadAggressively, - descriptorMap)), - - // Collect all non-private member names higher up the hierarchy. - new ClassHierarchyTraveler(false, true, true, false, - new AllMemberVisitor( - new MemberAccessFilter(0, ClassConstants.ACC_PRIVATE, - new MemberNameCollector(configuration.overloadAggressively, - descriptorMap)))), - - // Assign new names to all conflicting private members in this - // class. - new AllMemberVisitor( - new MemberAccessFilter(ClassConstants.ACC_PRIVATE, 0, - new MemberNameConflictFixer(configuration.overloadAggressively, - descriptorMap, - warningPrinter, - new MemberObfuscator(configuration.overloadAggressively, - specialNameFactory, - specialDescriptorMap)))), - - // Clear the collected names. - new MapCleaner(descriptorMap) - })); - - // Print out any warnings about member name conflicts. - int warningCount = warningPrinter.getWarningCount(); - if (warningCount > 0) - { - System.err.println("Warning: there were " + warningCount + - " conflicting class member name mappings."); - System.err.println(" Your configuration may be inconsistent."); - - if (!configuration.ignoreWarnings) - { - System.err.println(" If you are sure the conflicts are harmless,"); - System.err.println(" you could try your luck using the '-ignorewarnings' option."); - } - - System.err.println(" (http://proguard.sourceforge.net/manual/troubleshooting.html#mappingconflict2)"); - - if (!configuration.ignoreWarnings) - { - throw new IOException("Please correct the above warnings first."); - } - } - - // Print out the mapping, if requested. - if (configuration.printMapping != null) - { - PrintStream ps = - configuration.printMapping == Configuration.STD_OUT ? System.out : - new PrintStream( - new BufferedOutputStream( - new FileOutputStream(configuration.printMapping))); - - // Print out items that will be removed. - programClassPool.classesAcceptAlphabetically(new MappingPrinter(ps)); - - if (ps == System.out) - { - ps.flush(); - } - else - { - ps.close(); - } - } - - // Actually apply the new names. - programClassPool.classesAccept(new ClassRenamer()); - libraryClassPool.classesAccept(new ClassRenamer()); - - // Update all references to these new names. - programClassPool.classesAccept(new ClassReferenceFixer(false)); - libraryClassPool.classesAccept(new ClassReferenceFixer(false)); - programClassPool.classesAccept(new MemberReferenceFixer()); - - // Make package visible elements public or protected, if obfuscated - // classes are being repackaged aggressively. - if (configuration.repackageClasses != null && - configuration.allowAccessModification) - { - programClassPool.classesAccept( - new AccessFixer()); - - // Fix the access flags of the inner classes information. - programClassPool.classesAccept( - new AllAttributeVisitor( - new AllInnerClassesInfoVisitor( - new InnerClassesAccessFixer()))); - } - - // Fix the bridge method flags. - programClassPool.classesAccept( - new AllMethodVisitor( - new BridgeMethodFixer())); - - // Rename the source file attributes, if requested. - if (configuration.newSourceFileAttribute != null) - { - programClassPool.classesAccept(new SourceFileRenamer(configuration.newSourceFileAttribute)); - } - - // Remove unused constants. - programClassPool.classesAccept( - new ConstantPoolShrinker()); - } -} |