Function MS_CHAP2_GenerateAuthenticatorResponse

scapy/layers/radius.py:1482–1514

rfc 2759 sect 8.7

(HashNT,
                                           NTResponse,
                                           PeerChallenge,
                                           AuthenticatorChallenge,
                                           UserName)

def MS_CHAP2_GenerateAuthenticatorResponse(HashNT,
                                           NTResponse,
                                           PeerChallenge,
                                           AuthenticatorChallenge,
                                           UserName):
    """
    rfc 2759 sect 8.7
    """
    Magic1 = bytes(bytearray([
        0x4D, 0x61, 0x67, 0x69, 0x63, 0x20, 0x73, 0x65, 0x72, 0x76,
        0x65, 0x72, 0x20, 0x74, 0x6F, 0x20, 0x63, 0x6C, 0x69, 0x65,
        0x6E, 0x74, 0x20, 0x73, 0x69, 0x67, 0x6E, 0x69, 0x6E, 0x67,
        0x20, 0x63, 0x6F, 0x6E, 0x73, 0x74, 0x61, 0x6E, 0x74,
    ]))
    Magic2 = bytes(bytearray([
        0x50, 0x61, 0x64, 0x20, 0x74, 0x6F, 0x20, 0x6D, 0x61, 0x6B,
        0x65, 0x20, 0x69, 0x74, 0x20, 0x64, 0x6F, 0x20, 0x6D, 0x6F,
        0x72, 0x65, 0x20, 0x74, 0x68, 0x61, 0x6E, 0x20, 0x6F, 0x6E,
        0x65, 0x20, 0x69, 0x74, 0x65, 0x72, 0x61, 0x74, 0x69, 0x6F,
        0x6E
    ]))
    PasswordHash = HashNT
    PasswordHashHash = Hash_MD4().digest(PasswordHash)

    Digest = Hash_SHA().digest(PasswordHashHash + NTResponse + Magic1)

    Challenge = MS_CHAP2_ChallengeHash(
        PeerChallenge,
        AuthenticatorChallenge,
        UserName,
    )

    return Hash_SHA().digest(Digest + Challenge + Magic2)


# Answering machine