Source code for univention.radius.pyMsChapV2

#!/usr/bin/python3
#
# Univention RADIUS 802.1X
#  helper functions for RFC 2759
#
# SPDX-FileCopyrightText: 2012-2025 Univention GmbH
# SPDX-License-Identifier: AGPL-3.0-only

import passlib.crypto.des
from samba.crypto import md4_hash_blob




[docs]
def md4(data: bytes) -> bytes:
    return md4_hash_blob(data)






[docs]
def DesEncrypt(data: bytes, key: bytes) -> bytes:
    return passlib.crypto.des.des_encrypt_block(key, data)






[docs]
def HashNtPasswordHash(passwordhash: bytes) -> bytes:
    return md4(passwordhash)






[docs]
def ChallengeResponse(challenge: bytes, passwordhash: bytes) -> bytes:
    z_password_hash = passwordhash.ljust(21, b'\0')
    response = DesEncrypt(challenge, z_password_hash[0:7])
    response += DesEncrypt(challenge, z_password_hash[7:14])
    response += DesEncrypt(challenge, z_password_hash[14:21])
    return response