/**
* Closes the given print stream, or closes it if is the standard output.
*
* @param printStream
*/
private void closePrintStream(PrintStream printStream) {
if (printStream == System.out) {
printStream.flush();
} else {
printStream.close();
}
}
/** 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));
// Mark attributes that have to be kept.
AttributeUsageMarker requiredAttributeUsageMarker = new AttributeUsageMarker();
AttributeVisitor optionalAttributeUsageMarker =
configuration.keepAttributes == null
? null
: new AttributeNameFilter(
new ListParser(new NameParser()).parse(configuration.keepAttributes),
requiredAttributeUsageMarker);
programClassPool.classesAccept(
new AllAttributeVisitor(
true,
new RequiredAttributeFilter(
requiredAttributeUsageMarker, optionalAttributeUsageMarker)));
// 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 mappingWarningCount = warningPrinter.getWarningCount();
if (mappingWarningCount > 0) {
System.err.println(
"Warning: there were "
+ mappingWarningCount
+ " 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,");
System.err.println(
" you could try your luck using the '-ignorewarnings' option.");
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.INTERNAL_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.INTERNAL_ACC_PRIVATE,
new MemberNameCollector(
configuration.overloadAggressively, descriptorMap)))),
// Assign new names to all non-private members in this class.
new AllMemberVisitor(
new MemberAccessFilter(
0,
ClassConstants.INTERNAL_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.INTERNAL_ACC_PRIVATE,
new MemberNameCollector(
configuration.overloadAggressively, descriptorMap)))),
// Assign new names to all private members in this class.
new AllMemberVisitor(
new MemberAccessFilter(
ClassConstants.INTERNAL_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.INTERNAL_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.INTERNAL_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.INTERNAL_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.INTERNAL_ACC_PRIVATE,
new MemberNameCollector(
configuration.overloadAggressively, descriptorMap)))),
// Assign new names to all conflicting private members in this
// class.
new AllMemberVisitor(
new MemberAccessFilter(
ClassConstants.INTERNAL_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.");
throw new IOException("Please correct the above warnings first.");
}
}
// Print out the mapping, if requested.
if (configuration.printMapping != null) {
PrintStream ps =
isFile(configuration.printMapping)
? new PrintStream(
new BufferedOutputStream(new FileOutputStream(configuration.printMapping)))
: System.out;
// Print out items that will be removed.
programClassPool.classesAcceptAlphabetically(new MappingPrinter(ps));
if (ps != System.out) {
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 AllConstantVisitor(new AccessFixer()));
}
// Rename the source file attributes, if requested.
if (configuration.newSourceFileAttribute != null) {
programClassPool.classesAccept(new SourceFileRenamer(configuration.newSourceFileAttribute));
}
// Mark NameAndType constant pool entries that have to be kept
// and remove the other ones.
programClassPool.classesAccept(new NameAndTypeUsageMarker());
programClassPool.classesAccept(new NameAndTypeShrinker());
// Mark Utf8 constant pool entries that have to be kept
// and remove the other ones.
programClassPool.classesAccept(new Utf8UsageMarker());
programClassPool.classesAccept(new Utf8Shrinker());
}