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| import binascii | |
| import sys | |
| from Crypto.Cipher import DES | |
| key="H3U89XT1" | |
| def mungeit(code): | |
| out=[] | |
| temp=[] | |
| numbers=code.split(" ") | |
| for i in numbers: | |
| num=0 | |
| binstr=binascii.unhexlify(i) | |
| for j in range(0,4): | |
| num+=ord(binstr[j])<<(j*8) | |
| temp.append(num) | |
| out.append(format(temp[0],'08x') + format(temp[1],'08x')) | |
| out.append(format(temp[2],'08x') + format(temp[3],'08x')) | |
| return out | |
| def decryptit(code,key): | |
| cipher=DES.new(key, DES.MODE_ECB) | |
| t=cipher.encrypt(binascii.unhexlify(code[0])) | |
| tx=''.join(chr(ord(a)^ord(b)) for a,b in zip(t, binascii.unhexlify(code[1]))) | |
| t2=cipher.encrypt(tx) | |
| unlock1=0 | |
| unlock2=0 | |
| for x in range(0,4): | |
| unlock1+=(ord(t2[x])<<(x*8)) | |
| unlock2+=(ord(t2[x+4])<<(x*8)) | |
| return unlock1 ^ unlock2 | |
| code="" | |
| for x in range(1,5): | |
| code+=sys.argv[x] | |
| if x != 4: | |
| code+=" " | |
| texts=mungeit(code) | |
| unlockcode=decryptit(texts, key) | |
| print "Unlock code: " + str(unlockcode) |