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Example 1 with PacketRead

use of net.runelite.deob.deobfuscators.packethandler.PacketRead in project runelite by runelite.

the class PacketHandler method findReorderableReads.

public void findReorderableReads() {
    for (PacketRead pr : reads) {
        // InstructionContext invokeCtx = pr.getInvokeCtx();
        List<Instruction> instructions = pr.getInvoke().getInstructions().getInstructions();
        // look for an lvt store immediately after
        int invokeIdx = instructions.indexOf(pr.getInvoke());
        assert invokeIdx != -1;
        Instruction next = instructions.get(invokeIdx + 1);
        if (next instanceof LVTInstruction) {
            LVTInstruction lvt = (LVTInstruction) next;
            if (lvt.store()) {
                logger.info("Found lvt store {} for {}", next, pr.getInvoke());
                pr.setStore(next);
            }
        }
    }
}
Also used : Instruction(net.runelite.asm.attributes.code.Instruction) LVTInstruction(net.runelite.asm.attributes.code.instruction.types.LVTInstruction) LVTInstruction(net.runelite.asm.attributes.code.instruction.types.LVTInstruction) PacketRead(net.runelite.deob.deobfuscators.packethandler.PacketRead)

Example 2 with PacketRead

use of net.runelite.deob.deobfuscators.packethandler.PacketRead in project runelite by runelite.

the class PacketHandler method getAfterRead.

public Instruction getAfterRead() {
    if (reads.isEmpty()) {
        return null;
    }
    PacketRead last = reads.get(reads.size() - 1);
    if (last.getStore() == null) {
        return null;
    }
    List<Instruction> ins = method.getCode().getInstructions().getInstructions();
    int idx = ins.indexOf(last.getStore());
    if (idx == -1) {
        // can be a read in not this function
        return null;
    }
    return ins.get(idx + 1);
}
Also used : Instruction(net.runelite.asm.attributes.code.Instruction) LVTInstruction(net.runelite.asm.attributes.code.instruction.types.LVTInstruction) PacketRead(net.runelite.deob.deobfuscators.packethandler.PacketRead)

Example 3 with PacketRead

use of net.runelite.deob.deobfuscators.packethandler.PacketRead in project runelite by runelite.

the class PacketHandlerOrder method run.

@Override
public void run(ClassGroup group) {
    // This is run on the deobfuscated jar, so there are no symbols yet...
    // Find packetType and buffer classes
    PacketTypeFinder ptf = new PacketTypeFinder(group);
    ptf.find();
    BufferFinder bf = new BufferFinder(group);
    bf.find();
    HandlerFinder hf = new HandlerFinder(group, ptf.getPacketType());
    PacketHandlers handlers = hf.findHandlers();
    logger.info("Found {} packet handlers", handlers.getHandlers().size());
    for (PacketHandler handler : handlers.getHandlers()) {
        Execution e = hf.getExecution();
        e.reset();
        e.staticStep = true;
        e.step = false;
        e.noInvoke = true;
        // exception processing won't do non-local jumps, so
        // depending on whether methods are inlined or not
        // it may jump completely out of the handler into the
        // catch all for all packet handling
        // just disable exception execution
        e.noExceptions = true;
        assert e.frames.isEmpty();
        Frame f = handler.jumpFrame.dup();
        assert f.isExecuting();
        f.getMethodCtx().reset();
        e.clearExecutionVisitor();
        e.addExecutionVisitor(ictx -> {
            if (ictx.getInstruction() instanceof MappableInstruction) {
                if (ictx.getInstruction().getType() != InstructionType.INVOKESTATIC) {
                    if (!handler.mappable.contains(ictx.getInstruction())) {
                        handler.mappable.add(ictx.getInstruction());
                    }
                }
            }
            if (ictx.getInstruction().getType() == InstructionType.INVOKEVIRTUAL) {
                InvokeInstruction ii = (InvokeInstruction) ictx.getInstruction();
                // check if the invoke is on buffer/packetbuffer classes
                boolean matches = ii.getMethods().stream().filter(m -> m.getDescriptor().size() == 0).map(method -> method.getClassFile()).anyMatch(cf -> cf == bf.getBuffer() || cf == bf.getPacketBuffer());
                if (matches) {
                    Method method = ii.getMethods().get(0);
                    Signature signature = method.getDescriptor();
                    Type returnValue = signature.getReturnValue();
                    // buffer reference
                    assert ictx.getPops().size() == 1;
                    InstructionContext bufferCtx = ictx.getPops().get(0).getPushed();
                    if (bufferCtx.getInstruction().getType() != InstructionType.GETSTATIC) {
                        // sometimes buffer is passed to a function and then invoked.
                        return;
                    }
                    PacketRead packetRead = new PacketRead(returnValue, bufferCtx.getInstruction(), ictx);
                    if (!handler.reads.contains(packetRead)) {
                        handler.reads.add(packetRead);
                    }
                }
            }
            if (ictx.getInstruction().getType() == InstructionType.INVOKEVIRTUAL || ictx.getInstruction().getType() == InstructionType.INVOKESPECIAL || ictx.getInstruction().getType() == InstructionType.INVOKEINTERFACE) {
                InvokeInstruction ii = (InvokeInstruction) ictx.getInstruction();
                // read methods are scrambled so cant count them
                if (!handler.hasPacketRead(ictx.getInstruction())) {
                    handler.methodInvokes.addAll(ii.getMethods());
                }
            }
            if (ictx.getInstruction() instanceof SetFieldInstruction) {
                SetFieldInstruction sfi = (SetFieldInstruction) ictx.getInstruction();
                Field field = sfi.getMyField();
                if (field != null) {
                    handler.fieldWrite.add(field);
                }
            }
            if (ictx.getInstruction() instanceof GetFieldInstruction) {
                GetFieldInstruction gfi = (GetFieldInstruction) ictx.getInstruction();
                Field field = gfi.getMyField();
                if (field != null) {
                    handler.fieldRead.add(field);
                }
            }
            if (ictx.getInstruction() instanceof LVTInstruction) {
                LVTInstruction lvt = (LVTInstruction) ictx.getInstruction();
                if (!lvt.store()) {
                    // get lvt access order
                    Frame frame = ictx.getFrame();
                    int order = frame.getNextOrder();
                    if (!handler.lvtOrder.containsKey(lvt.getVariableIndex())) {
                        handler.lvtOrder.put(lvt.getVariableIndex(), order);
                    }
                }
            }
            if (ictx.getInstruction() instanceof PushConstantInstruction) {
                PushConstantInstruction pci = (PushConstantInstruction) ictx.getInstruction();
                handler.constants.add(pci.getConstant());
            }
        });
        logger.debug("Beginning execution of opcode {}", handler.getOpcode());
        e.run();
        logger.info("Executed opcode {}: {} mappable instructions", handler.getOpcode(), handler.mappable.size());
        handler.findReorderableReads();
    }
    List<PacketHandler> unsortedHandlers = new ArrayList<>(handlers.getHandlers());
    List<PacketHandler> sortedHandlers = new ArrayList<>(handlers.getHandlers()).stream().sorted((PacketHandler p1, PacketHandler p2) -> {
        int c = compareReads(p1.reads, p2.reads);
        if (c != 0) {
            return c;
        }
        if (p1.methodInvokes.size() != p2.methodInvokes.size()) {
            return Integer.compare(p1.methodInvokes.size(), p2.methodInvokes.size());
        }
        if (p1.fieldRead.size() != p2.fieldRead.size()) {
            return Integer.compare(p1.fieldRead.size(), p2.fieldRead.size());
        }
        if (p1.fieldWrite.size() != p2.fieldWrite.size()) {
            return Integer.compare(p1.fieldWrite.size(), p2.fieldWrite.size());
        }
        int i = Integer.compare(p1.mappable.size(), p2.mappable.size());
        if (i != 0) {
            return i;
        }
        int s1 = hashConstants(p1.constants), s2 = hashConstants(p2.constants);
        if (s1 != s2) {
            return Integer.compare(s1, s2);
        }
        logger.warn("Unable to differentiate {} from {}", p1, p2);
        return 0;
    }).map(s -> s.clone()).collect(Collectors.toList());
    assert sortedHandlers.size() == handlers.getHandlers().size();
    for (PacketHandler handler : sortedHandlers) {
        handler.sortedReads = new ArrayList<>(handler.reads);
        Collections.sort(handler.sortedReads, (PacketRead p1, PacketRead p2) -> {
            LVTInstruction l1 = (LVTInstruction) p1.getStore();
            LVTInstruction l2 = (LVTInstruction) p2.getStore();
            if (l1 == null && l2 == null) {
                return 0;
            }
            if (l1 == null) {
                return 1;
            }
            if (l2 == null) {
                return -1;
            }
            if (l1.getVariableIndex() == l2.getVariableIndex()) {
                return 0;
            }
            Integer i1 = handler.lvtOrder.get(l1.getVariableIndex());
            Integer i2 = handler.lvtOrder.get(l2.getVariableIndex());
            assert i1 != null;
            assert i2 != null;
            int i = Integer.compare(i1, i2);
            if (i == 0) {
                logger.warn("Cannot differentiate {} from {}", p1, p2);
            }
            return i;
        });
        Collections.reverse(handler.sortedReads);
    }
    ClassFile runeliteOpcodes = group.findClass(RUNELITE_OPCODES);
    assert runeliteOpcodes != null : "Opcodes class must exist";
    for (PacketHandler handler : sortedHandlers) {
        logger.info("Handler {} mappable {} reads {} invokes {} freads {} fwrites {}", handler.getOpcode(), handler.mappable.size(), handler.reads.size(), handler.methodInvokes.size(), handler.fieldRead.size(), handler.fieldWrite.size());
        final String fieldName = "PACKET_SERVER_" + handler.getOpcode();
        // Add opcode fields
        if (runeliteOpcodes.findField(fieldName) == null) {
            Field opField = new Field(runeliteOpcodes, fieldName, Type.INT);
            // ACC_FINAL causes javac to inline the fields, which prevents
            // the mapper from doing field mapping
            opField.setAccessFlags(ACC_PUBLIC | ACC_STATIC);
            // setting a non-final static field value
            // doesn't work with fernflower
            opField.setValue(handler.getOpcode());
            runeliteOpcodes.addField(opField);
            // add initialization
            Method clinit = runeliteOpcodes.findMethod("<clinit>");
            assert clinit != null;
            Instructions instructions = clinit.getCode().getInstructions();
            instructions.addInstruction(0, new LDC(instructions, handler.getOpcode()));
            instructions.addInstruction(1, new PutStatic(instructions, opField));
        }
    }
    // Find unique methods
    List<Method> methods = unsortedHandlers.stream().map(ph -> ph.getMethod()).distinct().collect(Collectors.toList());
    for (Method m : methods) {
        List<PacketHandler> unsortedMethodHandlers = unsortedHandlers.stream().filter(ph -> ph.getMethod() == m).collect(Collectors.toList());
        List<PacketHandler> sortedMethodHandlers = sortedHandlers.stream().filter(ph -> ph.getMethod() == m).collect(Collectors.toList());
        assert unsortedMethodHandlers.size() == sortedMethodHandlers.size();
        for (int i = 0; i < sortedMethodHandlers.size(); ++i) {
            PacketHandler unsorted = unsortedMethodHandlers.get(i);
            PacketHandler sortedh = sortedMethodHandlers.get(i);
            // Set opcode/jump from sorted -> unsorted
            If jump = (If) unsorted.getJump();
            PushConstantInstruction pci = (PushConstantInstruction) unsorted.getPush();
            assert unsorted.getOpcode() == ((Number) pci.getConstant()).intValue();
            Instructions instructions = unsorted.getMethod().getCode().getInstructions();
            final String fieldName = "PACKET_SERVER_" + sortedh.getOpcode();
            net.runelite.asm.pool.Field field = new net.runelite.asm.pool.Field(new net.runelite.asm.pool.Class(RUNELITE_OPCODES), fieldName, Type.INT);
            instructions.replace(unsorted.getPush(), new GetStatic(instructions, field));
            assert jump.getType() == InstructionType.IF_ICMPEQ || jump.getType() == InstructionType.IF_ICMPNE;
            Label startLabel = instructions.createLabelFor(sortedh.getStart());
            if (jump.getType() == InstructionType.IF_ICMPEQ) {
                instructions.replace(jump, new IfICmpEq(instructions, startLabel));
            } else if (jump.getType() == InstructionType.IF_ICMPNE) {
                // insert a jump after to go to sortedh start
                int idx = instructions.getInstructions().indexOf(jump);
                assert idx != -1;
                instructions.addInstruction(idx + 1, new Goto(instructions, startLabel));
            } else {
                throw new IllegalStateException();
            }
        }
    }
    insertSortedReads(group, sortedHandlers);
    insertPacketLength(group, ptf);
}
Also used : IfICmpEq(net.runelite.asm.attributes.code.instructions.IfICmpEq) LoggerFactory(org.slf4j.LoggerFactory) PacketHandler(net.runelite.deob.s2c.PacketHandler) Goto(net.runelite.asm.attributes.code.instructions.Goto) If(net.runelite.asm.attributes.code.instructions.If) LVTInstruction(net.runelite.asm.attributes.code.instruction.types.LVTInstruction) InstructionType(net.runelite.asm.attributes.code.InstructionType) SetFieldInstruction(net.runelite.asm.attributes.code.instruction.types.SetFieldInstruction) PacketTypeFinder(net.runelite.deob.deobfuscators.packethandler.PacketTypeFinder) GetFieldInstruction(net.runelite.asm.attributes.code.instruction.types.GetFieldInstruction) Type(net.runelite.asm.Type) Deobfuscator(net.runelite.deob.Deobfuscator) BufferFinder(net.runelite.deob.deobfuscators.transformers.buffer.BufferFinder) Collectors(java.util.stream.Collectors) InstructionContext(net.runelite.asm.execution.InstructionContext) ComparisonInstruction(net.runelite.asm.attributes.code.instruction.types.ComparisonInstruction) List(java.util.List) ACC_PUBLIC(org.objectweb.asm.Opcodes.ACC_PUBLIC) NoSuchAlgorithmException(java.security.NoSuchAlgorithmException) PacketRead(net.runelite.deob.deobfuscators.packethandler.PacketRead) Signature(net.runelite.asm.signature.Signature) PushConstantInstruction(net.runelite.asm.attributes.code.instruction.types.PushConstantInstruction) MessageDigest(java.security.MessageDigest) PutStatic(net.runelite.asm.attributes.code.instructions.PutStatic) ACC_STATIC(org.objectweb.asm.Opcodes.ACC_STATIC) ArrayList(java.util.ArrayList) ClassGroup(net.runelite.asm.ClassGroup) Method(net.runelite.asm.Method) InvokeInstruction(net.runelite.asm.attributes.code.instruction.types.InvokeInstruction) JumpingInstruction(net.runelite.asm.attributes.code.instruction.types.JumpingInstruction) GetStatic(net.runelite.asm.attributes.code.instructions.GetStatic) Frame(net.runelite.asm.execution.Frame) Logger(org.slf4j.Logger) RUNELITE_OPCODES(net.runelite.deob.deobfuscators.transformers.OpcodesTransformer.RUNELITE_OPCODES) Field(net.runelite.asm.Field) PacketLengthFinder(net.runelite.deob.deobfuscators.packethandler.PacketLengthFinder) Ints(com.google.common.primitives.Ints) InvokeVirtual(net.runelite.asm.attributes.code.instructions.InvokeVirtual) Execution(net.runelite.asm.execution.Execution) ClassFile(net.runelite.asm.ClassFile) Label(net.runelite.asm.attributes.code.Label) PacketHandlers(net.runelite.deob.s2c.PacketHandlers) HandlerFinder(net.runelite.deob.s2c.HandlerFinder) IfEq(net.runelite.asm.attributes.code.instructions.IfEq) LDC(net.runelite.asm.attributes.code.instructions.LDC) Instructions(net.runelite.asm.attributes.code.Instructions) Instruction(net.runelite.asm.attributes.code.Instruction) MappableInstruction(net.runelite.asm.attributes.code.instruction.types.MappableInstruction) Collections(java.util.Collections) Frame(net.runelite.asm.execution.Frame) BufferFinder(net.runelite.deob.deobfuscators.transformers.buffer.BufferFinder) PacketHandlers(net.runelite.deob.s2c.PacketHandlers) ArrayList(java.util.ArrayList) Label(net.runelite.asm.attributes.code.Label) LDC(net.runelite.asm.attributes.code.instructions.LDC) PacketRead(net.runelite.deob.deobfuscators.packethandler.PacketRead) Field(net.runelite.asm.Field) MappableInstruction(net.runelite.asm.attributes.code.instruction.types.MappableInstruction) Execution(net.runelite.asm.execution.Execution) GetStatic(net.runelite.asm.attributes.code.instructions.GetStatic) IfICmpEq(net.runelite.asm.attributes.code.instructions.IfICmpEq) InstructionContext(net.runelite.asm.execution.InstructionContext) SetFieldInstruction(net.runelite.asm.attributes.code.instruction.types.SetFieldInstruction) Goto(net.runelite.asm.attributes.code.instructions.Goto) ClassFile(net.runelite.asm.ClassFile) PushConstantInstruction(net.runelite.asm.attributes.code.instruction.types.PushConstantInstruction) Instructions(net.runelite.asm.attributes.code.Instructions) Method(net.runelite.asm.Method) LVTInstruction(net.runelite.asm.attributes.code.instruction.types.LVTInstruction) PutStatic(net.runelite.asm.attributes.code.instructions.PutStatic) InvokeInstruction(net.runelite.asm.attributes.code.instruction.types.InvokeInstruction) InstructionType(net.runelite.asm.attributes.code.InstructionType) Type(net.runelite.asm.Type) PacketHandler(net.runelite.deob.s2c.PacketHandler) Signature(net.runelite.asm.signature.Signature) HandlerFinder(net.runelite.deob.s2c.HandlerFinder) PacketTypeFinder(net.runelite.deob.deobfuscators.packethandler.PacketTypeFinder) GetFieldInstruction(net.runelite.asm.attributes.code.instruction.types.GetFieldInstruction) If(net.runelite.asm.attributes.code.instructions.If)

Aggregations

Instruction (net.runelite.asm.attributes.code.Instruction)3 LVTInstruction (net.runelite.asm.attributes.code.instruction.types.LVTInstruction)3 PacketRead (net.runelite.deob.deobfuscators.packethandler.PacketRead)3 Ints (com.google.common.primitives.Ints)1 MessageDigest (java.security.MessageDigest)1 NoSuchAlgorithmException (java.security.NoSuchAlgorithmException)1 ArrayList (java.util.ArrayList)1 Collections (java.util.Collections)1 List (java.util.List)1 Collectors (java.util.stream.Collectors)1 ClassFile (net.runelite.asm.ClassFile)1 ClassGroup (net.runelite.asm.ClassGroup)1 Field (net.runelite.asm.Field)1 Method (net.runelite.asm.Method)1 Type (net.runelite.asm.Type)1 InstructionType (net.runelite.asm.attributes.code.InstructionType)1 Instructions (net.runelite.asm.attributes.code.Instructions)1 Label (net.runelite.asm.attributes.code.Label)1 ComparisonInstruction (net.runelite.asm.attributes.code.instruction.types.ComparisonInstruction)1 GetFieldInstruction (net.runelite.asm.attributes.code.instruction.types.GetFieldInstruction)1