Import NK15 passwords

This commit is contained in:
Yohann D'ANELLO 2020-02-20 10:26:00 +01:00
parent 71a88e84f7
commit e28b19b353
2 changed files with 33 additions and 0 deletions

27
apps/member/hashers.py Normal file
View File

@ -0,0 +1,27 @@
# Copyright (C) 2018-2020 by BDE ENS Paris-Saclay
# SPDX-License-Identifier: GPL-3.0-or-later
import hashlib
from django.contrib.auth.hashers import PBKDF2PasswordHasher
from django.utils.crypto import constant_time_compare
class CustomNK15Hasher(PBKDF2PasswordHasher):
"""
Permet d'importer les mots de passe depuis la Note KFet 2015.
Si un hash de mot de passe est de la forme :
`custom_nk15$<NB>$<ENCODED>`
<NB> est un entier quelconque (symbolisant normalement un nombre d'itérations)
et <ENCODED> le hash du mot de passe dans la Note Kfet 2015,
alors ce hasher va vérifier le mot de passe.
N'ayant pas la priorité (cf note_kfet/settings/base.py), le mot de passe sera
converti automatiquement avec l'algorithme PBKDF2.
"""
algorithm = "custom_nk15"
def verify(self, password, encoded):
if '|' in encoded:
salt, db_hashed_pass = encoded.split('$')[2].split('|')
return constant_time_compare(hashlib.sha256((salt + password).encode("utf-8")).hexdigest(), db_hashed_pass)
return super().verify(password, encoded)

View File

@ -110,6 +110,12 @@ AUTH_PASSWORD_VALIDATORS = [
},
]
# Use our custom hasher in order to import NK15 passwords
PASSWORD_HASHERS = [
'django.contrib.auth.hashers.PBKDF2PasswordHasher',
'member.hashers.CustomNK15Hasher',
]
# Django Guardian object permissions
AUTHENTICATION_BACKENDS = (