hgsupass.py

import hashlib
import argparse

parser = argparse.ArgumentParser()
parser.add_argument("challenge")
parser.add_argument("-q", "--quiet", action="store_true")
args = parser.parse_args()
challenge = args.challenge


def suPassword(arg):
    premd5 = bytearray(8)
    for i in range(8):
        if ord(arg[i]) <= 0x47:
            premd5[i] = ord(arg[i]) << 1
        else:
            premd5[i] = ord(arg[i]) >> 1
    md5hash = hashlib.md5()
    md5hash.update(premd5)
    print("MD5:", md5hash.hexdigest())
    prepass = bytearray(md5hash.digest())
    challpass = bytearray(8)
    for i in range(8):
        temp2 = (prepass[i] >> 1) * 0xB60B60B7
        temp2 = temp2 >> (5 + 32)
        temp1 = temp2 << 3
        temp1 = temp1 - (temp2 << 1)
        temp3 = (temp1 << 4)
        temp3 = temp3 - temp1
        temp0 = prepass[i] - temp3 + 0x21
        temp0 = temp0 & 0xFF
        if temp0 == 0x3F:
            challpass[i] = 0x3E
        else:
            challpass[i] = temp0
    print("Password:", challpass.decode())


if args.challenge:
    if len(challenge) == 8:
        suPassword(challenge)
    else:
        print("Challenge must have 8 chars")