keygen-crackme2.py

BITMASK32 = int('0xffffffff', 16)


def hash_name(name):
    if any([ord(x) < ord('A') for x in name]):
        return 1

    out = []
    for each in name:

        if ord(each) >= ord('Z'):
            sub = ord(each) - 0x20
            out.append(sub)
        else:
            out.append(ord(each))

    hashsum = sum(out) & BITMASK32

    return hashsum ^ 0x5678


def hash_pass(pswd):
    hashsum = 0

    for each in pswd:
        hashsum *= 0xa
        hashsum += ord(each) - 0x30

    hashsum &= BITMASK32

    return hashsum ^ 0x1234


def generate_key(hash_n):
    for i in range(1000000):

        if hash_pass(str(i)) == hash_n:
            return str(i)


def main():
    name = input()

    hashed_n = hash_name(name)

    print('hashed_n', hex(hashed_n))

    pswd = generate_key(hashed_n)
    print('pswd', pswd)


if __name__ == '__main__':
    main()