Example #1
0
  private void hookRecieveMessage(ClassNode cn) {
    Pattern p =
        new PatternBuilder()
            .add(
                new InstructionElement(DUP),
                new InstructionElement(INVOKESPECIAL),
                new LdcElement(new LdcInsnNode("\n")))
            .build();

    for (MethodNode mn : cn.methods) {
      if (!p.contains(mn.instructions)) continue;

      int offset = p.getOffset(mn.instructions);

      MethodInsnNode getMsgInsn = (MethodInsnNode) mn.instructions.get(offset + 5);

      InsnList inject = new InsnList();
      inject.add(new VarInsnNode(ALOAD, 1));
      inject.add(
          new MethodInsnNode(
              INVOKEVIRTUAL, getMsgInsn.owner, getMsgInsn.name, "()Ljava/lang/String;", false));
      inject.add(
          new MethodInsnNode(
              INVOKESTATIC,
              "me/themallard/bitmmo/impl/plugin/chathook/ChatHookManager",
              "onReceiveMessage",
              "(Ljava/lang/String;)V",
              false));

      mn.instructions.insertBefore(mn.instructions.get(offset), inject);
    }
  }
Example #2
0
  private void createAddMessage(ClassNode cn) {
    Pattern p =
        new PatternBuilder()
            .add(
                new InstructionElement(ALOAD),
                new LdcElement(new LdcInsnNode("")),
                new InstructionElement(ALOAD),
                new InstructionElement(INVOKEVIRTUAL))
            .build();

    MethodInsnNode ebola1 = null;

    for (MethodNode mn : cn.methods) {
      if (!p.contains(mn.instructions)) continue;

      int offset = p.getOffset(mn.instructions);

      ebola1 = (MethodInsnNode) mn.instructions.get(offset + 3);
    }

    {
      MethodVisitor mv =
          cn.visitMethod(ACC_PUBLIC, "addChatMessage", "(Ljava/lang/String;)V", null, null);
      mv.visitVarInsn(ALOAD, 0);
      mv.visitLdcInsn("");
      mv.visitVarInsn(ALOAD, 1);
      mv.visitMethodInsn(INVOKEVIRTUAL, ebola1.owner, ebola1.name, ebola1.desc, ebola1.itf);
      mv.visitInsn(RETURN);
      mv.visitEnd();
    }
  }
Example #3
0
  private void hookSendMessage(ClassNode cn) {
    Pattern p =
        new PatternBuilder()
            .add(
                new InstructionElement(INVOKESTATIC),
                new AnyElement(),
                new LdcElement(new LdcInsnNode("Chat")),
                new InstructionElement(INVOKEVIRTUAL))
            .build();

    for (MethodNode mn : cn.methods) {
      if (!p.contains(mn.instructions)) continue;

      int offset = p.getOffset(mn.instructions) + 4;

      InsnList inject = new InsnList();
      inject.add(new VarInsnNode(ALOAD, 2));
      inject.add(
          new MethodInsnNode(
              INVOKESTATIC,
              "me/themallard/bitmmo/impl/plugin/chathook/ChatHookManager",
              "onChatMessage",
              "(Ljava/lang/String;)V",
              false));

      mn.instructions.insert(mn.instructions.get(offset), inject);
    }
  }
Example #4
0
  // too lazy to deobfuscate all network/chat stuff, use info from method
  // calls to create new send message function
  private void createSendMessage(ClassNode cn) {
    Pattern p =
        new PatternBuilder()
            .add(
                new InstructionElement(INVOKESTATIC),
                new AnyElement(),
                new LdcElement(new LdcInsnNode("Chat")),
                new InstructionElement(INVOKEVIRTUAL))
            .build();

    MethodInsnNode newBuilder = null;
    MethodInsnNode setChatText = null;
    MethodInsnNode ebola1 = null;
    MethodInsnNode ebola2 = null;
    MethodInsnNode ebola3 = null;
    MethodInsnNode ebola4 = null;
    MethodInsnNode ebola5 = null;
    MethodInsnNode ebola6 = null;
    MethodInsnNode ebola7 = null;

    for (MethodNode mn : cn.methods) {
      if (!p.contains(mn.instructions)) continue;

      int offset = p.getOffset(mn.instructions);

      newBuilder = (MethodInsnNode) mn.instructions.get(offset - 9); // newbuilder
      // then var insn of parameter, ldc or w/e
      setChatText = (MethodInsnNode) mn.instructions.get(offset - 7); // setchattext
      ebola1 = (MethodInsnNode) mn.instructions.get(offset - 6); // U a
      ebola2 = (MethodInsnNode) mn.instructions.get(offset - 5); // U p
      ebola3 = (MethodInsnNode) mn.instructions.get(offset - 4); // Player
      // r
      ebola4 = (MethodInsnNode) mn.instructions.get(offset - 3); // setMapID
      ebola5 = (MethodInsnNode) mn.instructions.get(offset - 2); // build
      // store that crap
      ebola6 = (MethodInsnNode) mn.instructions.get(offset); // i e
      // load crap again
      // LDC "Chat"
      ebola7 = (MethodInsnNode) mn.instructions.get(offset + 3); // i a
    }

    {
      MethodVisitor mv =
          cn.visitMethod(ACC_PUBLIC, "sendChatMessage", "(Ljava/lang/String;)V", null, null);
      mv.visitMethodInsn(
          INVOKESTATIC, newBuilder.owner, newBuilder.name, newBuilder.desc, newBuilder.itf);
      mv.visitVarInsn(ALOAD, 1);
      mv.visitMethodInsn(
          INVOKEVIRTUAL, setChatText.owner, setChatText.name, setChatText.desc, setChatText.itf);
      mv.visitMethodInsn(INVOKESTATIC, ebola1.owner, ebola1.name, ebola1.desc, ebola1.itf);
      mv.visitMethodInsn(INVOKEVIRTUAL, ebola2.owner, ebola2.name, ebola2.desc, ebola2.itf);
      mv.visitMethodInsn(INVOKEVIRTUAL, ebola3.owner, ebola3.name, ebola3.desc, ebola3.itf);
      mv.visitMethodInsn(INVOKEVIRTUAL, ebola4.owner, ebola4.name, ebola4.desc, ebola4.itf);
      mv.visitMethodInsn(INVOKEVIRTUAL, ebola5.owner, ebola5.name, ebola5.desc, ebola5.itf);
      mv.visitVarInsn(ASTORE, 2);
      mv.visitMethodInsn(INVOKESTATIC, ebola6.owner, ebola6.name, ebola6.desc, ebola6.itf);
      mv.visitVarInsn(ALOAD, 2);
      mv.visitLdcInsn("Chat");
      mv.visitMethodInsn(INVOKEVIRTUAL, ebola7.owner, ebola7.name, ebola7.desc, ebola7.itf);
      mv.visitInsn(RETURN);
      mv.visitMaxs(2, 2);
      mv.visitEnd();
    }
  }