1 files changed, 548 insertions, 0 deletions

diff --git a/src/cuchaz/enigma/Deobfuscator.java b/src/cuchaz/enigma/Deobfuscator.java
new file mode 100644
index 0000000..08a974a
--- /dev/null
+++ b/src/cuchaz/enigma/Deobfuscator.java
@@ -0,0 +1,548 @@
+/*******************************************************************************
+ * Copyright (c) 2015 Jeff Martin.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the GNU Lesser General Public
+ * License v3.0 which accompanies this distribution, and is available at
+ * http://www.gnu.org/licenses/lgpl.html
+ * 
+ * Contributors:
+ *     Jeff Martin - initial API and implementation
+ ******************************************************************************/
+package cuchaz.enigma;
+
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.FileWriter;
+import java.io.IOException;
+import java.io.StringWriter;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+import java.util.jar.JarEntry;
+import java.util.jar.JarFile;
+import java.util.jar.JarOutputStream;
+
+import javassist.CtClass;
+import javassist.bytecode.Descriptor;
+
+import com.google.common.collect.Maps;
+import com.google.common.collect.Sets;
+import com.strobel.assembler.metadata.MetadataSystem;
+import com.strobel.assembler.metadata.TypeDefinition;
+import com.strobel.assembler.metadata.TypeReference;
+import com.strobel.decompiler.DecompilerContext;
+import com.strobel.decompiler.DecompilerSettings;
+import com.strobel.decompiler.PlainTextOutput;
+import com.strobel.decompiler.languages.java.JavaOutputVisitor;
+import com.strobel.decompiler.languages.java.ast.AstBuilder;
+import com.strobel.decompiler.languages.java.ast.CompilationUnit;
+import com.strobel.decompiler.languages.java.ast.InsertParenthesesVisitor;
+
+import cuchaz.enigma.analysis.EntryReference;
+import cuchaz.enigma.analysis.JarClassIterator;
+import cuchaz.enigma.analysis.JarIndex;
+import cuchaz.enigma.analysis.SourceIndex;
+import cuchaz.enigma.analysis.SourceIndexVisitor;
+import cuchaz.enigma.analysis.Token;
+import cuchaz.enigma.bytecode.ClassProtectifier;
+import cuchaz.enigma.bytecode.ClassPublifier;
+import cuchaz.enigma.mapping.ArgumentEntry;
+import cuchaz.enigma.mapping.BehaviorEntry;
+import cuchaz.enigma.mapping.ClassEntry;
+import cuchaz.enigma.mapping.ClassMapping;
+import cuchaz.enigma.mapping.ConstructorEntry;
+import cuchaz.enigma.mapping.Entry;
+import cuchaz.enigma.mapping.FieldEntry;
+import cuchaz.enigma.mapping.FieldMapping;
+import cuchaz.enigma.mapping.Mappings;
+import cuchaz.enigma.mapping.MappingsChecker;
+import cuchaz.enigma.mapping.MappingsRenamer;
+import cuchaz.enigma.mapping.MethodEntry;
+import cuchaz.enigma.mapping.MethodMapping;
+import cuchaz.enigma.mapping.TranslationDirection;
+import cuchaz.enigma.mapping.Translator;
+
+public class Deobfuscator {
+        
+        public interface ProgressListener {
+                void init(int totalWork, String title);
+                void onProgress(int numDone, String message);
+        }
+        
+        private JarFile m_jar;
+        private DecompilerSettings m_settings;
+        private JarIndex m_jarIndex;
+        private Mappings m_mappings;
+        private MappingsRenamer m_renamer;
+        private Map<TranslationDirection,Translator> m_translatorCache;
+        
+        public Deobfuscator(JarFile jar) throws IOException {
+                m_jar = jar;
+                
+                // build the jar index
+                m_jarIndex = new JarIndex();
+                m_jarIndex.indexJar(m_jar, true);
+                
+                // config the decompiler
+                m_settings = DecompilerSettings.javaDefaults();
+                m_settings.setMergeVariables(true);
+                m_settings.setForceExplicitImports(true);
+                m_settings.setForceExplicitTypeArguments(true);
+                m_settings.setShowDebugLineNumbers(true);
+                // DEBUG
+                //m_settings.setShowSyntheticMembers(true);
+                
+                // init defaults
+                m_translatorCache = Maps.newTreeMap();
+                
+                // init mappings
+                setMappings(new Mappings());
+        }
+        
+        public JarFile getJar() {
+                return m_jar;
+        }
+        
+        public String getJarName() {
+                return m_jar.getName();
+        }
+        
+        public JarIndex getJarIndex() {
+                return m_jarIndex;
+        }
+        
+        public Mappings getMappings() {
+                return m_mappings;
+        }
+        
+        public void setMappings(Mappings val) {
+                setMappings(val, true);
+        }
+        
+        public void setMappings(Mappings val, boolean warnAboutDrops) {
+                if (val == null) {
+                        val = new Mappings();
+                }
+                
+                // drop mappings that don't match the jar
+                MappingsChecker checker = new MappingsChecker(m_jarIndex);
+                checker.dropBrokenMappings(val);
+                if (warnAboutDrops) {
+                        for (java.util.Map.Entry<ClassEntry,ClassMapping> mapping : checker.getDroppedClassMappings().entrySet()) {
+                                System.out.println("WARNING: Couldn't find class entry " + mapping.getKey() + " (" + mapping.getValue().getDeobfName() + ") in jar. Mapping was dropped.");
+                        }
+                        for (java.util.Map.Entry<ClassEntry,ClassMapping> mapping : checker.getDroppedInnerClassMappings().entrySet()) {
+                                System.out.println("WARNING: Couldn't find inner class entry " + mapping.getKey() + " (" + mapping.getValue().getDeobfName() + ") in jar. Mapping was dropped.");
+                        }
+                        for (java.util.Map.Entry<FieldEntry,FieldMapping> mapping : checker.getDroppedFieldMappings().entrySet()) {
+                                System.out.println("WARNING: Couldn't find field entry " + mapping.getKey() + " (" + mapping.getValue().getDeobfName() + ") in jar. Mapping was dropped.");
+                        }
+                        for (java.util.Map.Entry<BehaviorEntry,MethodMapping> mapping : checker.getDroppedMethodMappings().entrySet()) {
+                                System.out.println("WARNING: Couldn't find behavior entry " + mapping.getKey() + " (" + mapping.getValue().getDeobfName() + ") in jar. Mapping was dropped.");
+                        }
+                }
+                
+                // check for related method inconsistencies
+                if (checker.getRelatedMethodChecker().hasProblems()) {
+                        throw new Error("Related methods are inconsistent! Need to fix the mappings manually.\n" + checker.getRelatedMethodChecker().getReport());
+                }
+                
+                m_mappings = val;
+                m_renamer = new MappingsRenamer(m_jarIndex, val);
+                m_translatorCache.clear();
+        }
+        
+        public Translator getTranslator(TranslationDirection direction) {
+                Translator translator = m_translatorCache.get(direction);
+                if (translator == null) {
+                        translator = m_mappings.getTranslator(direction, m_jarIndex.getTranslationIndex());
+                        m_translatorCache.put(direction, translator);
+                }
+                return translator;
+        }
+        
+        public void getSeparatedClasses(List<ClassEntry> obfClasses, List<ClassEntry> deobfClasses) {
+                for (ClassEntry obfClassEntry : m_jarIndex.getObfClassEntries()) {
+                        // skip inner classes
+                        if (obfClassEntry.isInnerClass()) {
+                                continue;
+                        }
+                        
+                        // separate the classes
+                        ClassEntry deobfClassEntry = deobfuscateEntry(obfClassEntry);
+                        if (!deobfClassEntry.equals(obfClassEntry)) {
+                                // if the class has a mapping, clearly it's deobfuscated
+                                deobfClasses.add(deobfClassEntry);
+                        } else if (!obfClassEntry.getPackageName().equals(Constants.NonePackage)) {
+                                // also call it deobufscated if it's not in the none package
+                                deobfClasses.add(obfClassEntry);
+                        } else {
+                                // otherwise, assume it's still obfuscated
+                                obfClasses.add(obfClassEntry);
+                        }
+                }
+        }
+        
+        public CompilationUnit getSourceTree(String className) {
+                
+                // we don't know if this class name is obfuscated or deobfuscated
+                // we need to tell the decompiler the deobfuscated name so it doesn't get freaked out
+                // the decompiler only sees classes after deobfuscation, so we need to load it by the deobfuscated name if there is one
+                
+                // first, assume class name is deobf
+                String deobfClassName = className;
+                
+                // if it wasn't actually deobf, then we can find a mapping for it and get the deobf name
+                ClassMapping classMapping = m_mappings.getClassByObf(className);
+                if (classMapping != null && classMapping.getDeobfName() != null) {
+                        deobfClassName = classMapping.getDeobfName();
+                }
+                
+                // set the type loader
+                TranslatingTypeLoader loader = new TranslatingTypeLoader(
+                        m_jar,
+                        m_jarIndex,
+                        getTranslator(TranslationDirection.Obfuscating),
+                        getTranslator(TranslationDirection.Deobfuscating)
+                ); 
+                m_settings.setTypeLoader(loader);
+
+                // see if procyon can find the type
+                TypeReference type = new MetadataSystem(loader).lookupType(deobfClassName);
+                if (type == null) {
+                        throw new Error(String.format("Unable to find type: %s (deobf: %s)\nTried class names: %s",
+                                className, deobfClassName, loader.getClassNamesToTry(deobfClassName)
+                        ));
+                }
+                TypeDefinition resolvedType = type.resolve();
+                
+                // decompile it!
+                DecompilerContext context = new DecompilerContext();
+                context.setCurrentType(resolvedType);
+                context.setSettings(m_settings);
+                AstBuilder builder = new AstBuilder(context);
+                builder.addType(resolvedType);
+                builder.runTransformations(null);
+                return builder.getCompilationUnit();
+        }
+        
+        public SourceIndex getSourceIndex(CompilationUnit sourceTree, String source) {
+                return getSourceIndex(sourceTree, source, null);
+        }
+        
+        public SourceIndex getSourceIndex(CompilationUnit sourceTree, String source, Boolean ignoreBadTokens) {
+                
+                // build the source index
+                SourceIndex index;
+                if (ignoreBadTokens != null) {
+                        index = new SourceIndex(source, ignoreBadTokens);
+                } else {
+                        index = new SourceIndex(source);
+                }
+                sourceTree.acceptVisitor(new SourceIndexVisitor(), index);
+                
+                // DEBUG
+                // sourceTree.acceptVisitor( new TreeDumpVisitor( new File( "tree.txt" ) ), null );
+                
+                // resolve all the classes in the source references
+                for (Token token : index.referenceTokens()) {
+                        EntryReference<Entry,Entry> deobfReference = index.getDeobfReference(token);
+                        
+                        // get the obfuscated entry
+                        Entry obfEntry = obfuscateEntry(deobfReference.entry);
+                        
+                        // try to resolve the class
+                        ClassEntry resolvedObfClassEntry = m_jarIndex.getTranslationIndex().resolveEntryClass(obfEntry);
+                        if (resolvedObfClassEntry != null && !resolvedObfClassEntry.equals(obfEntry.getClassEntry())) {
+                                // change the class of the entry
+                                obfEntry = obfEntry.cloneToNewClass(resolvedObfClassEntry);
+                                
+                                // save the new deobfuscated reference
+                                deobfReference.entry = deobfuscateEntry(obfEntry);
+                                index.replaceDeobfReference(token, deobfReference);
+                        }
+                        
+                        // DEBUG
+                        // System.out.println( token + " -> " + reference + " -> " + index.getReferenceToken( reference ) );
+                }
+                
+                return index;
+        }
+        
+        public String getSource(CompilationUnit sourceTree) {
+                // render the AST into source
+                StringWriter buf = new StringWriter();
+                sourceTree.acceptVisitor(new InsertParenthesesVisitor(), null);
+                sourceTree.acceptVisitor(new JavaOutputVisitor(new PlainTextOutput(buf), m_settings), null);
+                return buf.toString();
+        }
+        
+        public void writeSources(File dirOut, ProgressListener progress) throws IOException {
+                // get the classes to decompile
+                Set<ClassEntry> classEntries = Sets.newHashSet();
+                for (ClassEntry obfClassEntry : m_jarIndex.getObfClassEntries()) {
+                        // skip inner classes
+                        if (obfClassEntry.isInnerClass()) {
+                                continue;
+                        }
+                        
+                        classEntries.add(obfClassEntry);
+                }
+                
+                if (progress != null) {
+                        progress.init(classEntries.size(), "Decompiling classes...");
+                }
+                
+                // DEOBFUSCATE ALL THE THINGS!! @_@
+                int i = 0;
+                for (ClassEntry obfClassEntry : classEntries) {
+                        ClassEntry deobfClassEntry = deobfuscateEntry(new ClassEntry(obfClassEntry));
+                        if (progress != null) {
+                                progress.onProgress(i++, deobfClassEntry.toString());
+                        }
+                        
+                        try {
+                                // get the source
+                                String source = getSource(getSourceTree(obfClassEntry.getName()));
+                                
+                                // write the file
+                                File file = new File(dirOut, deobfClassEntry.getName().replace('.', '/') + ".java");
+                                file.getParentFile().mkdirs();
+                                try (FileWriter out = new FileWriter(file)) {
+                                        out.write(source);
+                                }
+                        } catch (Throwable t) {
+                                throw new Error("Unable to deobfuscate class " + deobfClassEntry.toString() + " (" + obfClassEntry.toString() + ")", t);
+                        }
+                }
+                if (progress != null) {
+                        progress.onProgress(i, "Done!");
+                }
+        }
+        
+        public void writeJar(File out, ProgressListener progress) {
+                final TranslatingTypeLoader loader = new TranslatingTypeLoader(
+                        m_jar,
+                        m_jarIndex,
+                        getTranslator(TranslationDirection.Obfuscating),
+                        getTranslator(TranslationDirection.Deobfuscating)
+                );
+                transformJar(out, progress, new ClassTransformer() {
+
+                        @Override
+                        public CtClass transform(CtClass c) throws Exception {
+                                return loader.transformClass(c);
+                        }
+                });
+        }
+        
+        public void protectifyJar(File out, ProgressListener progress) {
+                transformJar(out, progress, new ClassTransformer() {
+
+                        @Override
+                        public CtClass transform(CtClass c) throws Exception {
+                                return ClassProtectifier.protectify(c);
+                        }
+                });
+        }
+        
+        public void publifyJar(File out, ProgressListener progress) {
+                transformJar(out, progress, new ClassTransformer() {
+
+                        @Override
+                        public CtClass transform(CtClass c) throws Exception {
+                                return ClassPublifier.publify(c);
+                        }
+                });
+        }
+        
+        private interface ClassTransformer {
+                public CtClass transform(CtClass c) throws Exception;
+        }
+        private void transformJar(File out, ProgressListener progress, ClassTransformer transformer) {
+                try (JarOutputStream outJar = new JarOutputStream(new FileOutputStream(out))) {
+                        if (progress != null) {
+                                progress.init(JarClassIterator.getClassEntries(m_jar).size(), "Transforming classes...");
+                        }
+                        
+                        int i = 0;
+                        for (CtClass c : JarClassIterator.classes(m_jar)) {
+                                if (progress != null) {
+                                        progress.onProgress(i++, c.getName());
+                                }
+                                
+                                try {
+                                        c = transformer.transform(c);
+                                        outJar.putNextEntry(new JarEntry(c.getName().replace('.', '/') + ".class"));
+                                        outJar.write(c.toBytecode());
+                                        outJar.closeEntry();
+                                } catch (Throwable t) {
+                                        throw new Error("Unable to transform class " + c.getName(), t);
+                                }
+                        }
+                        if (progress != null) {
+                                progress.onProgress(i, "Done!");
+                        }
+                        
+                        outJar.close();
+                } catch (IOException ex) {
+                        throw new Error("Unable to write to Jar file!");
+                }
+        }
+        
+        public <T extends Entry> T obfuscateEntry(T deobfEntry) {
+                if (deobfEntry == null) {
+                        return null;
+                }
+                return getTranslator(TranslationDirection.Obfuscating).translateEntry(deobfEntry);
+        }
+        
+        public <T extends Entry> T deobfuscateEntry(T obfEntry) {
+                if (obfEntry == null) {
+                        return null;
+                }
+                return getTranslator(TranslationDirection.Deobfuscating).translateEntry(obfEntry);
+        }
+        
+        public <E extends Entry,C extends Entry> EntryReference<E,C> obfuscateReference(EntryReference<E,C> deobfReference) {
+                if (deobfReference == null) {
+                        return null;
+                }
+                return new EntryReference<E,C>(
+                        obfuscateEntry(deobfReference.entry),
+                        obfuscateEntry(deobfReference.context),
+                        deobfReference
+                );
+        }
+        
+        public <E extends Entry,C extends Entry> EntryReference<E,C> deobfuscateReference(EntryReference<E,C> obfReference) {
+                if (obfReference == null) {
+                        return null;
+                }
+                return new EntryReference<E,C>(
+                        deobfuscateEntry(obfReference.entry),
+                        deobfuscateEntry(obfReference.context),
+                        obfReference
+                );
+        }
+        
+        public boolean isObfuscatedIdentifier(Entry obfEntry) {
+                
+                if (obfEntry instanceof MethodEntry) {
+                        
+                        // HACKHACK: Object methods are not obfuscated identifiers
+                        MethodEntry obfMethodEntry = (MethodEntry)obfEntry;
+                        String name = obfMethodEntry.getName();
+                        String sig = obfMethodEntry.getSignature().toString();
+                        if (name.equals("clone") && sig.equals("()Ljava/lang/Object;")) {
+                                return false;
+                        } else if (name.equals("equals") && sig.equals("(Ljava/lang/Object;)Z")) {
+                                return false;
+                        } else if (name.equals("finalize") && sig.equals("()V")) {
+                                return false;
+                        } else if (name.equals("getClass") && sig.equals("()Ljava/lang/Class;")) {
+                                return false;
+                        } else if (name.equals("hashCode") && sig.equals("()I")) {
+                                return false;
+                        } else if (name.equals("notify") && sig.equals("()V")) {
+                                return false;
+                        } else if (name.equals("notifyAll") && sig.equals("()V")) {
+                                return false;
+                        } else if (name.equals("toString") && sig.equals("()Ljava/lang/String;")) {
+                                return false;
+                        } else if (name.equals("wait") && sig.equals("()V")) {
+                                return false;
+                        } else if (name.equals("wait") && sig.equals("(J)V")) {
+                                return false;
+                        } else if (name.equals("wait") && sig.equals("(JI)V")) {
+                                return false;
+                        }
+                }
+                
+                return m_jarIndex.containsObfEntry(obfEntry);
+        }
+        
+        public boolean isRenameable(EntryReference<Entry,Entry> obfReference) {
+                return obfReference.isNamed() && isObfuscatedIdentifier(obfReference.getNameableEntry());
+        }
+        
+        // NOTE: these methods are a bit messy... oh well
+        
+        public boolean hasDeobfuscatedName(Entry obfEntry) {
+                Translator translator = getTranslator(TranslationDirection.Deobfuscating);
+                if (obfEntry instanceof ClassEntry) {
+                        ClassEntry obfClass = (ClassEntry)obfEntry;
+                        List<ClassMapping> mappingChain = m_mappings.getClassMappingChain(obfClass);
+                        ClassMapping classMapping = mappingChain.get(mappingChain.size() - 1);
+                        return classMapping != null && classMapping.getDeobfName() != null;
+                } else if (obfEntry instanceof FieldEntry) {
+                        return translator.translate((FieldEntry)obfEntry) != null;
+                } else if (obfEntry instanceof MethodEntry) {
+                        return translator.translate((MethodEntry)obfEntry) != null;
+                } else if (obfEntry instanceof ConstructorEntry) {
+                        // constructors have no names
+                        return false;
+                } else if (obfEntry instanceof ArgumentEntry) {
+                        return translator.translate((ArgumentEntry)obfEntry) != null;
+                } else {
+                        throw new Error("Unknown entry type: " + obfEntry.getClass().getName());
+                }
+        }
+        
+        public void rename(Entry obfEntry, String newName) {
+                if (obfEntry instanceof ClassEntry) {
+                        m_renamer.setClassName((ClassEntry)obfEntry, Descriptor.toJvmName(newName));
+                } else if (obfEntry instanceof FieldEntry) {
+                        m_renamer.setFieldName((FieldEntry)obfEntry, newName);
+                } else if (obfEntry instanceof MethodEntry) {
+                        m_renamer.setMethodTreeName((MethodEntry)obfEntry, newName);
+                } else if (obfEntry instanceof ConstructorEntry) {
+                        throw new IllegalArgumentException("Cannot rename constructors");
+                } else if (obfEntry instanceof ArgumentEntry) {
+                        m_renamer.setArgumentName((ArgumentEntry)obfEntry, newName);
+                } else {
+                        throw new Error("Unknown entry type: " + obfEntry.getClass().getName());
+                }
+                
+                // clear caches
+                m_translatorCache.clear();
+        }
+        
+        public void removeMapping(Entry obfEntry) {
+                if (obfEntry instanceof ClassEntry) {
+                        m_renamer.removeClassMapping((ClassEntry)obfEntry);
+                } else if (obfEntry instanceof FieldEntry) {
+                        m_renamer.removeFieldMapping((FieldEntry)obfEntry);
+                } else if (obfEntry instanceof MethodEntry) {
+                        m_renamer.removeMethodTreeMapping((MethodEntry)obfEntry);
+                } else if (obfEntry instanceof ConstructorEntry) {
+                        throw new IllegalArgumentException("Cannot rename constructors");
+                } else if (obfEntry instanceof ArgumentEntry) {
+                        m_renamer.removeArgumentMapping((ArgumentEntry)obfEntry);
+                } else {
+                        throw new Error("Unknown entry type: " + obfEntry);
+                }
+                
+                // clear caches
+                m_translatorCache.clear();
+        }
+        
+        public void markAsDeobfuscated(Entry obfEntry) {
+                if (obfEntry instanceof ClassEntry) {
+                        m_renamer.markClassAsDeobfuscated((ClassEntry)obfEntry);
+                } else if (obfEntry instanceof FieldEntry) {
+                        m_renamer.markFieldAsDeobfuscated((FieldEntry)obfEntry);
+                } else if (obfEntry instanceof MethodEntry) {
+                        m_renamer.markMethodTreeAsDeobfuscated((MethodEntry)obfEntry);
+                } else if (obfEntry instanceof ConstructorEntry) {
+                        throw new IllegalArgumentException("Cannot rename constructors");
+                } else if (obfEntry instanceof ArgumentEntry) {
+                        m_renamer.markArgumentAsDeobfuscated((ArgumentEntry)obfEntry);
+                } else {
+                        throw new Error("Unknown entry type: " + obfEntry);
+                }
+                
+                // clear caches
+                m_translatorCache.clear();
+        }
+}