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FIDO2.py
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FIDO2.py
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from fido2.client import Fido2Client
from fido2.server import Fido2Server, PublicKeyCredentialRpEntity
from fido2.webauthn import AttestationObject, AuthenticatorData, CollectedClientData
from django.template.context_processors import csrf
from django.views.decorators.csrf import csrf_exempt
from django.shortcuts import render
# from django.template.context import RequestContext
import simplejson
from fido2 import cbor
from django.http import HttpResponse
from django.conf import settings
from .models import *
from fido2.utils import websafe_decode, websafe_encode
from fido2.webauthn import AttestedCredentialData
from .views import login, reset_cookie
import datetime
from .Common import get_redirect_url
from django.utils import timezone
def recheck(request):
"""Starts FIDO2 recheck"""
context = csrf(request)
context["mode"] = "recheck"
request.session["mfa_recheck"] = True
return render(request, "FIDO2/recheck.html", context)
def getServer():
"""Get Server Info from settings and returns a Fido2Server"""
rp = PublicKeyCredentialRpEntity(id=settings.FIDO_SERVER_ID, name=settings.FIDO_SERVER_NAME)
return Fido2Server(rp)
def begin_registeration(request):
"""Starts registering a new FIDO Device, called from API"""
server = getServer()
registration_data, state = server.register_begin({
u'id': request.user.username.encode("utf8"),
u'name': (request.user.first_name + " " + request.user.last_name),
u'displayName': request.user.username,
}, getUserCredentials(request.user.username))
request.session['fido_state'] = state
return HttpResponse(cbor.encode(registration_data), content_type = 'application/octet-stream')
@csrf_exempt
def complete_reg(request):
"""Completes the registeration, called by API"""
try:
data = cbor.decode(request.body)
client_data = CollectedClientData(data['clientDataJSON'])
att_obj = AttestationObject((data['attestationObject']))
server = getServer()
auth_data = server.register_complete(
request.session['fido_state'],
client_data,
att_obj
)
encoded = websafe_encode(auth_data.credential_data)
uk = User_Keys()
uk.username = request.user.username
uk.properties = {"device": encoded, "type": att_obj.fmt, }
uk.owned_by_enterprise = getattr(settings, "MFA_OWNED_BY_ENTERPRISE", False)
uk.key_type = "FIDO2"
uk.save()
return HttpResponse(simplejson.dumps({'status': 'OK'}))
except Exception as exp:
import traceback
print(traceback.format_exc())
try:
from raven.contrib.django.raven_compat.models import client
client.captureException()
except:
pass
return HttpResponse(simplejson.dumps({'status': 'ERR', "message": "Error on server, please try again later"}))
def start(request):
"""Start Registeration a new FIDO Token"""
context = csrf(request)
context.update(get_redirect_url())
return render(request, "FIDO2/Add.html", context)
def getUserCredentials(username):
credentials = []
for uk in User_Keys.objects.filter(username = username, key_type = "FIDO2"):
credentials.append(AttestedCredentialData(websafe_decode(uk.properties["device"])))
return credentials
def auth(request):
context = csrf(request)
return render(request, "FIDO2/Auth.html", context)
def authenticate_begin(request):
server = getServer()
credentials = getUserCredentials(request.session.get("base_username", request.user.username))
auth_data, state = server.authenticate_begin(credentials)
request.session['fido_state'] = state
return HttpResponse(cbor.encode(auth_data), content_type = "application/octet-stream")
@csrf_exempt
def authenticate_complete(request):
try:
credentials = []
username = request.session.get("base_username", request.user.username)
server = getServer()
credentials = getUserCredentials(username)
data = cbor.decode(request.body)
credential_id = data['credentialId']
client_data = CollectedClientData(data['clientDataJSON'])
auth_data = AuthenticatorData(data['authenticatorData'])
signature = data['signature']
try:
cred = server.authenticate_complete(
request.session.pop('fido_state'),
credentials,
credential_id,
client_data,
auth_data,
signature
)
except ValueError:
return HttpResponse(simplejson.dumps({'status': "ERR",
"message": "Wrong challenge received, make sure that this is your security and try again."}),
content_type = "application/json")
except Exception as excep:
try:
from raven.contrib.django.raven_compat.models import client
client.captureException()
except:
pass
return HttpResponse(simplejson.dumps({'status': "ERR",
"message": excep.message}),
content_type = "application/json")
if request.session.get("mfa_recheck", False):
import time
request.session["mfa"]["rechecked_at"] = time.time()
return HttpResponse(simplejson.dumps({'status': "OK"}),
content_type = "application/json")
else:
import random
keys = User_Keys.objects.filter(username = username, key_type = "FIDO2", enabled = 1)
for k in keys:
if AttestedCredentialData(websafe_decode(k.properties["device"])).credential_id == cred.credential_id:
k.last_used = timezone.now()
k.save()
mfa = {"verified": True, "method": "FIDO2", 'id': k.id}
if getattr(settings, "MFA_RECHECK", False):
mfa["next_check"] = datetime.datetime.timestamp((datetime.datetime.now() + datetime.timedelta(
seconds = random.randint(settings.MFA_RECHECK_MIN, settings.MFA_RECHECK_MAX))))
request.session["mfa"] = mfa
try:
authenticated = request.user.is_authenticated
except:
authenticated = request.user.is_authenticated()
if not authenticated:
res = login(request)
if not "location" in res: return reset_cookie(request)
return HttpResponse(simplejson.dumps({'status': "OK", "redirect": res["location"]}),
content_type = "application/json")
return HttpResponse(simplejson.dumps({'status': "OK"}),
content_type = "application/json")
except Exception as exp:
return HttpResponse(simplejson.dumps({'status': "ERR", "message": exp.message}),
content_type = "application/json")