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/*******************************************************************************
* Copyright (c) 2014 Jeff Martin.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the GNU Public License v3.0
* which accompanies this distribution, and is available at
* http://www.gnu.org/licenses/gpl.html
*
* Contributors:
* Jeff Martin - initial API and implementation
******************************************************************************/
package cuchaz.enigma;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.StringWriter;
import java.util.Enumeration;
import java.util.List;
import java.util.Map;
import java.util.jar.JarEntry;
import java.util.jar.JarFile;
import com.strobel.decompiler.Decompiler;
import com.strobel.decompiler.DecompilerSettings;
import com.strobel.decompiler.PlainTextOutput;
import cuchaz.enigma.mapping.Ancestries;
import cuchaz.enigma.mapping.ArgumentEntry;
import cuchaz.enigma.mapping.ClassEntry;
import cuchaz.enigma.mapping.ClassMapping;
import cuchaz.enigma.mapping.Entry;
import cuchaz.enigma.mapping.FieldEntry;
import cuchaz.enigma.mapping.Mappings;
import cuchaz.enigma.mapping.MethodEntry;
import cuchaz.enigma.mapping.Renamer;
import cuchaz.enigma.mapping.TranslationDirection;
import cuchaz.enigma.mapping.Translator;
public class Deobfuscator
{
private File m_file;
private JarFile m_jar;
private DecompilerSettings m_settings;
private Ancestries m_ancestries;
private Mappings m_mappings;
private Renamer m_renamer;
public Deobfuscator( File file )
throws IOException
{
m_file = file;
m_jar = new JarFile( m_file );
// build the ancestries
InputStream jarIn = null;
try
{
m_ancestries = new Ancestries();
jarIn = new FileInputStream( m_file );
m_ancestries.readFromJar( jarIn );
}
finally
{
Util.closeQuietly( jarIn );
}
// config the decompiler
m_settings = DecompilerSettings.javaDefaults();
m_settings.setForceExplicitImports( true );
m_settings.setShowSyntheticMembers( true );
// init mappings
setMappings( new Mappings() );
}
public String getJarName( )
{
return m_file.getName();
}
public Ancestries getAncestries( )
{
return m_ancestries;
}
public Mappings getMappings( )
{
return m_mappings;
}
public void setMappings( Mappings val )
{
if( val == null )
{
val = new Mappings();
}
m_mappings = val;
m_renamer = new Renamer( m_ancestries, m_mappings );
// update decompiler options
m_settings.setTypeLoader( new TranslatingTypeLoader(
m_jar,
m_mappings.getTranslator( m_ancestries, TranslationDirection.Obfuscating ),
m_mappings.getTranslator( m_ancestries, TranslationDirection.Deobfuscating )
) );
}
public void getSeparatedClasses( List<ClassFile> obfClasses, Map<ClassFile,String> deobfClasses )
{
Enumeration<JarEntry> entries = m_jar.entries();
while( entries.hasMoreElements() )
{
JarEntry entry = entries.nextElement();
// skip everything but class files
if( !entry.getName().endsWith( ".class" ) )
{
continue;
}
// get the class name from the file
String className = entry.getName().substring( 0, entry.getName().length() - 6 );
ClassFile classFile = new ClassFile( className );
// separate the classes
ClassMapping classMapping = m_mappings.getClassByObf( classFile.getName() );
if( classMapping != null )
{
deobfClasses.put( classFile, classMapping.getDeobfName() );
}
else
{
obfClasses.add( classFile );
}
}
}
public String getSource( final ClassFile classFile )
{
// is this class deobfuscated?
// we need to tell the decompiler the deobfuscated name so it doesn't get freaked out
// the decompiler only sees the deobfuscated class, so we need to load it by the deobfuscated name
String deobfName = classFile.getName();
ClassMapping classMapping = m_mappings.getClassByObf( classFile.getName() );
if( classMapping != null )
{
deobfName = classMapping.getDeobfName();
}
// decompile it!
StringWriter buf = new StringWriter();
Decompiler.decompile( deobfName, new PlainTextOutput( buf ), m_settings );
return buf.toString();
}
// NOTE: these methods are a bit messy... oh well
public void rename( Entry obfEntry, String newName )
{
if( obfEntry instanceof ClassEntry )
{
m_renamer.setClassName( (ClassEntry)obfEntry, newName );
}
else if( obfEntry instanceof FieldEntry )
{
m_renamer.setFieldName( (FieldEntry)obfEntry, newName );
}
else if( obfEntry instanceof MethodEntry )
{
m_renamer.setMethodName( (MethodEntry)obfEntry, newName );
}
else if( obfEntry instanceof ArgumentEntry )
{
m_renamer.setArgumentName( (ArgumentEntry)obfEntry, newName );
}
else
{
throw new Error( "Unknown entry type: " + obfEntry.getClass().getName() );
}
}
public Entry obfuscateEntry( Entry deobfEntry )
{
Translator translator = m_mappings.getTranslator( m_ancestries, TranslationDirection.Obfuscating );
if( deobfEntry instanceof ClassEntry )
{
return translator.translateEntry( (ClassEntry)deobfEntry );
}
else if( deobfEntry instanceof FieldEntry )
{
return translator.translateEntry( (FieldEntry)deobfEntry );
}
else if( deobfEntry instanceof MethodEntry )
{
return translator.translateEntry( (MethodEntry)deobfEntry );
}
else if( deobfEntry instanceof ArgumentEntry )
{
return translator.translateEntry( (ArgumentEntry)deobfEntry );
}
else
{
throw new Error( "Unknown entry type: " + deobfEntry.getClass().getName() );
}
}
public Entry deobfuscateEntry( Entry obfEntry )
{
Translator translator = m_mappings.getTranslator( m_ancestries, TranslationDirection.Deobfuscating );
if( obfEntry instanceof ClassEntry )
{
return translator.translateEntry( (ClassEntry)obfEntry );
}
else if( obfEntry instanceof FieldEntry )
{
return translator.translateEntry( (FieldEntry)obfEntry );
}
else if( obfEntry instanceof MethodEntry )
{
return translator.translateEntry( (MethodEntry)obfEntry );
}
else if( obfEntry instanceof ArgumentEntry )
{
return translator.translateEntry( (ArgumentEntry)obfEntry );
}
else
{
throw new Error( "Unknown entry type: " + obfEntry.getClass().getName() );
}
}
public boolean hasMapping( Entry obfEntry )
{
Translator translator = m_mappings.getTranslator( m_ancestries, TranslationDirection.Deobfuscating );
if( obfEntry instanceof ClassEntry )
{
String deobfName = translator.translate( (ClassEntry)obfEntry );
return deobfName != null && !deobfName.equals( obfEntry.getName() );
}
else if( obfEntry instanceof FieldEntry )
{
String deobfName = translator.translate( (FieldEntry)obfEntry );
return deobfName != null && !deobfName.equals( obfEntry.getName() );
}
else if( obfEntry instanceof MethodEntry )
{
String deobfName = translator.translate( (MethodEntry)obfEntry );
return deobfName != null && !deobfName.equals( obfEntry.getName() );
}
else if( obfEntry instanceof ArgumentEntry )
{
return translator.translate( (ArgumentEntry)obfEntry ) != null;
}
else
{
throw new Error( "Unknown entry type: " + obfEntry.getClass().getName() );
}
}
}
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