beerpsi-x/geki/calc_title_server_enc_key.py

from hashlib import blake2b
import os
import sys

# MU3.Sys.System.keyIvDigestFixed
KEY_IV_DIGEST_FIXED = bytes([
    179, 10, 98, 130, 17, 166, 184, 233, 246, 211,
    46, 229, 236, 79, 78, 83, 107, 151, 195, 172,
    57, 72, 120, 103, 17, 124, 18, 64, 15, 225,
    169, 39
])

if len(sys.argv) < 4:
    print(f"Usage: python {os.path.basename(__file__)} <noise0> <noise1> <noise2>")
    exit(1)

with open(sys.argv[1], "rb") as f:
    key = blake2b(
        f.read(),
        digest_size=32,
        key=KEY_IV_DIGEST_FIXED,
    ).hexdigest()

    print(f"Key: {key}")

with open(sys.argv[2], "rb") as f:
    iv = blake2b(
        f.read(),
        digest_size=32,
        key=KEY_IV_DIGEST_FIXED,
    ).hexdigest()

    print(f"IV: {iv}")

with open(sys.argv[3], "rb") as f:
    salt = blake2b(
        f.read(),
        digest_size=32,
        key=KEY_IV_DIGEST_FIXED,
    ).hexdigest()

    print(f"Endpoint salt: {salt}")