rana-cli/wakatime/packages/ntlm_auth/compute_hash.py

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2017-02-15 23:02:05 +00:00
# This library is free software: you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation, either
# version 3 of the License, or (at your option) any later version.
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.
# You should have received a copy of the GNU Lesser General Public
# License along with this library. If not, see <http://www.gnu.org/licenses/> or <http://www.gnu.org/licenses/lgpl.txt>.
import binascii
import hashlib
import hmac
import re
from ntlm_auth import des
def _lmowfv1(password):
"""
[MS-NLMP] v28.0 2016-07-14
3.3.1 NTLM v1 Authentication
Same function as LMOWFv1 in document to create a one way hash of the password. Only
used in NTLMv1 auth without session security
:param password: The password of the user we are trying to authenticate with
:return res: A Lan Manager hash of the password supplied
"""
# fix the password length to 14 bytes
password = password.upper()
lm_pw = password[0:14]
# do hash
magic_str = b"KGS!@#$%" # page 56 in [MS-NLMP v28.0]
res = b''
dobj = des.DES(lm_pw[0:7])
res = res + dobj.encrypt(magic_str)
dobj = des.DES(lm_pw[7:14])
res = res + dobj.encrypt(magic_str)
return res
def _ntowfv1(password):
"""
[MS-NLMP] v28.0 2016-07-14
3.3.1 NTLM v1 Authentication
Same function as NTOWFv1 in document to create a one way hash of the password. Only
used in NTLMv1 auth without session security
:param password: The password of the user we are trying to authenticate with
:return digest: An NT hash of the password supplied
"""
digest = hashlib.new('md4', password.encode('utf-16le')).digest()
return digest
def _ntowfv2(user_name, password, domain_name):
"""
[MS-NLMP] v28.0 2016-07-14
3.3.2 NTLM v2 Authentication
Same function as NTOWFv2 (and LMOWFv2) in document to create a one way hash of the password.
This combines some extra security features over the v1 calculations used in NTLMv2 auth.
:param user_name: The user name of the user we are trying to authenticate with
:param password: The password of the user we are trying to authenticate with
:param domain_name: The domain name of the user account we are authenticated with
:return digest: An NT hash of the parameters supplied
"""
digest = _ntowfv1(password)
digest = hmac.new(digest, (user_name.upper() + domain_name).encode('utf-16le')).digest()
return digest