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https://github.com/drmext/MonkeyBusiness.git
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106 lines
2.7 KiB
Python
106 lines
2.7 KiB
Python
# https://bsnk.me/eamuse/
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from Cryptodome.Cipher import DES3
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KEY = bytes(i * 2 for i in b"?I'llB2c.YouXXXeMeHaYpy!")
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IV = bytes(8)
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valid_characters = "0123456789ABCDEFGHJKLMNPRSTUWXYZ"
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def enc_des(uid):
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cipher = DES3.new(KEY, DES3.MODE_CBC, IV)
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return cipher.encrypt(uid)
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def dec_des(uid):
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cipher = DES3.new(KEY, DES3.MODE_CBC, IV)
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return cipher.decrypt(uid)
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def checksum(data):
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chk = sum(data[i] * (i % 3 + 1) for i in range(15))
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while chk > 31:
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chk = (chk >> 5) + (chk & 31)
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return chk
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def pack_5(data):
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data = "".join(f"{i:05b}" for i in data)
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if len(data) % 8 != 0:
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data += "0" * (8 - (len(data) % 8))
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return bytes(int(data[i : i + 8], 2) for i in range(0, len(data), 8))
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def unpack_5(data):
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data = "".join(f"{i:08b}" for i in data)
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if len(data) % 5 != 0:
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data += "0" * (5 - (len(data) % 5))
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return bytes(int(data[i : i + 5], 2) for i in range(0, len(data), 5))
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def to_konami_id(uid):
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assert len(uid) == 16, "UID must be 16 bytes"
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if uid.upper().startswith("E004"):
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card_type = 1
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elif uid.upper().startswith("0"):
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card_type = 2
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else:
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raise ValueError("Invalid UID prefix")
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kid = bytes.fromhex(uid)
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assert len(kid) == 8, "ID must be 8 bytes"
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out = bytearray(unpack_5(enc_des(kid[::-1]))[:13]) + bytes(3)
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out[0] ^= card_type
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out[13] = 1
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for i in range(1, 14):
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out[i] ^= out[i - 1]
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out[14] = card_type
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out[15] = checksum(out)
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return "".join(valid_characters[i] for i in out)
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def to_uid(konami_id):
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if konami_id[14] == "1":
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card_type = 1
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elif konami_id[14] == "2":
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card_type = 2
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else:
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raise ValueError("Invalid ID")
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assert len(konami_id) == 16, f"ID must be 16 characters"
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assert all(
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i in valid_characters for i in konami_id
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), "ID contains invalid characters"
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card = [valid_characters.index(i) for i in konami_id]
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assert card[11] % 2 == card[12] % 2, "Parity check failed"
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assert card[13] == card[12] ^ 1, "Card invalid"
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assert card[15] == checksum(card), "Checksum failed"
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for i in range(13, 0, -1):
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card[i] ^= card[i - 1]
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card[0] ^= card_type
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card_id = dec_des(pack_5(card[:13])[:8])[::-1]
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card_id = card_id.hex().upper()
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if card_type == 1:
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assert card_id[:4] == "E004", "Invalid card type"
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elif card_type == 2:
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assert card_id[0] == "0", "Invalid card type"
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return card_id
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if __name__ == "__main__":
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assert to_konami_id("0000000000000000") == "007TUT8XJNSSPN2P", "To KID failed"
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assert to_uid("007TUT8XJNSSPN2P") == "0000000000000000", "From KID failed"
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assert (
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to_uid(to_konami_id("000000100200F000")) == "000000100200F000"
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), "Roundtrip failed"
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