SciresM

import idaapi
import idautils
import idc
import struct

def do_rename(eaaddr, name):
    idc.MakeCode(eaaddr)
    idc.MakeFunction(eaaddr)
    idc.MakeNameEx(eaaddr, name, idc.SN_NOWARN)

SciresM

def fe_xor(string, key):
    '''Decrypts a Fire Emblem Heroes string using a specified key.'''
    if type(key) == str:
        key = map(ord, key)
    cur_k = (key[0] + key[1]) & 0xFF
    crypt = ''
    for i in range(len(string)):
        cur_k ^= key[i % len(key)]
        crypt += chr((cur_k ^ ord(string[i])) or ord(string[i]))
    return crypt

SciresM

from struct import unpack as up
import sys, os

dirs, files = None, None

def read_at(fp, off, len):
    fp.seek(off)
    return fp.read(len)

def read_u8(fp, off):

SciresM

This is being hosted here, until the reddit post I made gets approved.

I saw, in the recent reddit thread about sighax, a lot of information being posted that's factually incorrect. I'd like to go ahead and clarify how sighax works, and how it's different from arm9loaderhax, while also clearing up some misconceptions I'm seeing (I really dislike misinformation).

What is sighax?

Sighax is an exploit taking advantage of a flaw in the arm9 bootrom, causing the signatures (which those of you less technically oriented may think of as "proofs of authenticity" that normally only Nintendo can generate) for arbitrary firmwares to be read as valid. On a normal boot, if one modifies the header for the firmware partition stored in NAND, the signatur

SciresM

        private static uint DecryptACNLMoney(ulong money)
        {
            // Unpack 64-bit value into (u32, u16, u8, u8) values.
            var enc = (uint)(money & 0xFFFFFFFF);
            var adjust = (ushort)((money >> 32) & 0xFFFF);
            var shift_val = (byte)((money >> 48) & 0xFF);
            var chk = (byte)((money >> 56) & 0xFF);

            // Validate 8-bit checksum
            if ((((enc >> 0) + (enc >> 8) + (enc >> 16) + (enc >> 24) + 0xBA) & 0xFF) != chk) return 0;

SciresM

Retail NAND FIRM:

Perfect Signature:
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

Exponentiated Message:
0002B31331C710412333A587890F9CF0B6A86E71C8A78F96B76082903B3E54EA9AB935978BBF2493BB829E9A5A6060B0C7811881176BCF9FE8B1C5C5E0A95327DB8B52EC178A884AD9CF28DB8BBF2922C05FD034AC81BD231AEB0CBEF6F7DE6F3A30812B9F9A83BF33251891BFA18FA38A64C6FF5F77DBE11C3780C23EA9F6D00F9C01D6FC8A878591D36C4F64ACA6B8D11BBEB21476103C6E86FF2196D465BA4DB78F81F1D3BCCA186BDDD56739A12DD36122F3F5B3DD518DDAC4FA29395EA4CD9DFD80AF8A399990F4FDD3CD6B07EC2122437CCFC3B62B1D1493A7DBB442003

SciresM

import os, sys
from struct import unpack as up

pkm_lst = ['Egg', 'Bulbasaur', 'Ivysaur', 'Venusaur', 'Charmander', 'Charmeleon', 'Charizard', 'Squirtle', 'Wartortle', 'Blastoise', 'Caterpie', 'Metapod', 'Butterfree', 'Weedle', 'Kakuna', 'Beedrill', 'Pidgey', 'Pidgeotto', 'Pidgeot', 'Rattata', 'Raticate', 'Spearow', 'Fearow', 'Ekans', 'Arbok', 'Pikachu', 'Raichu', 'Sandshrew', 'Sandslash', 'Nidoran-F', 'Nidorina', 'Nidoqueen', 'Nidoran-M', 'Nidorino', 'Nidoking', 'Clefairy', 'Clefable', 'Vulpix', 'Ninetales', 'Jigglypuff', 'Wigglytuff', 'Zubat', 'Golbat', 'Oddish', 'Gloom', 'Vileplume', 'Paras', 'Parasect', 'Venonat', 'Venomoth', 'Diglett', 'Dugtrio', 'Meowth', 'Persian', 'Psyduck', 'Golduck', 'Mankey', 'Primeape', 'Growlithe', 'Arcanine', 'Poliwag', 'Poliwhirl', 'Poliwrath', 'Abra', 'Kadabra', 'Alakazam', 'Machop', 'Machoke', 'Machamp', 'Bellsprout', 'Weepinbell', 'Victreebel', 'Tentacool', 'Tentacruel', 'Geodude', 'Graveler', 'Golem', 'Ponyta', 'Rapidash', 'Slowpoke', 'Slowbro', 'Magnemite', 'Magneton', 'Fa

SciresM

import binascii, sys, random, asn1
from fractions import gcd

def extended_gcd(aa, bb):
    lastremainder, remainder = abs(aa), abs(bb)
    x, lastx, y, lasty = 0, 1, 1, 0
    while remainder:
        lastremainder, (quotient, remainder) = remainder, divmod(lastremainder, remainder)
        x, lastx = lastx - quotient*x, x
        y, lasty = lasty - quotient*y, y

SciresM

from struct import unpack as up
import sys, os, hashlib

dirs, files = None, None

def read_at(fp, off, len):
    fp.seek(off)
    return fp.read(len)

def read_u8(fp, off):

SciresM

from struct import unpack as up
import sys, os

dirs, files = None, None

def read_at(fp, off, len):
    fp.seek(off)
    return fp.read(len)

def read_u8(fp, off):