Kagiya? What's that

narpas_sword.py

import hashlib

def secret(start: int, size: int) -> bytes:
    result = bytearray()
    add = start + size
    for i in range(size):
        result.append(start & 0xff)
        next = start + add
        add = start
        start = next
    return bytes(result)

SECRET = secret(-3, 10)

def derive(tid: bytes, passphrase: bytes) -> bytes:
    tids = hashlib.md5(SECRET + tid.lstrip(b'\x00')).digest()
    return hashlib.pbkdf2_hmac('sha1', passphrase, tids, 20, 32)

if __name__ == '__main__':
    print(derive(bytes.fromhex('000100014e414150'), b'nintendo').hex())
    print(derive(bytes.fromhex('000100014e414150'), b'mypass').hex())