Decencies

#!/usr/bin/env python3

from struct import *
from argparse import *

# Royal Kludge vendor ID
rk_venor = 0x258a

# Update File magic bytes
upf_magic = b'\x5a\xa5SINO'

Decencies

/* 
 * Auto-generated JNIC implementation file
 * 
 * 
 * 
 * 
 * 
 * 
 */

Decencies

Introduction

This small document will explain how I cracked version 3.3.1 of JNIC. (https://jnic.dev)

Motive

The motive of this crack was simply to test the strength of "DRM" applied to JNIC.

Methodology

Discovering the funny

Upon opening the JNIC JAR in a decompiler, I quickly discovered a 'JNICLoader' class, which contained methods whos first parameter were MethodHandles (all of these methods were named 'invoke').

Decencies

/**
 * Creates a pipeline associated to this block.
 *
 * @param [I] the current block's input.
 * @param [O] the current block's output.
 * @param [K] the resulting block's output.
 *
 * @return a block of type ([I]) -> [K].
 */
operator fun <I, O, K> ((I) -> O).plus(next: (O) -> K): (I) -> K = { input -> next(this(input)) }