652 lines
27 KiB
Python
652 lines
27 KiB
Python
# Imports from django
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from django.shortcuts import render
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from django.views.generic import View, FormView
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from django.contrib.auth import authenticate, login, logout
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from django.contrib.auth.models import User
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from django.http import HttpResponse
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from django.core.validators import validate_email, ValidationError
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from django.urls import reverse_lazy
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from django.contrib.auth.tokens import PasswordResetTokenGenerator
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from django.core.mail import EmailMessage
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from django.views.decorators.cache import cache_control
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from rest_framework.views import APIView
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from rest_framework.response import Response
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from .models import ResetToken
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from .forms import LoginForm
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from .ungleich_ldap import LdapManager
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from decouple import config, Csv
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from pyotp import TOTP
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import logging
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logger = logging.getLogger(__name__)
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# Imports for the extra stuff not in django
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from base64 import b64encode, b64decode
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from datetime import datetime
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from random import choice, randint
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import string
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import requests
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import json
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from django.conf import settings
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from django.contrib.auth.mixins import LoginRequiredMixin
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def activate_account_link(base_url, user, pwd, firstname, lastname, email, epochutc):
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tokengen = PasswordResetTokenGenerator()
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pseudouser = PseudoUser()
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token = tokengen.make_token(pseudouser)
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buser = bytes(user, 'utf-8')
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bpwd = bytes(pwd, 'utf-8')
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bfirstname = bytes(firstname, 'utf-8')
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blasttname = bytes(lastname, 'utf-8')
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bemail = bytes(email, 'utf-8')
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userpart = b64encode(buser)
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pwdpart = b64encode(bpwd)
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fnpart = b64encode(bfirstname)
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lnpart = b64encode(blasttname)
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mailpart = b64encode(bemail)
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# create entry into the database
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newdbentry = ResetToken(user=user, token=token, creation=epochutc)
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newdbentry.save()
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# set up the link
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link = "{base_url}/activate/{user}/{pwd}/{fn}/{ln}/{mail}/{token}/".format(
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base_url=base_url, user=userpart.decode('utf-8'),
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pwd=pwdpart.decode('utf-8'),
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fn=fnpart.decode('utf-8'),
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ln=lnpart.decode('utf-8'),
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mail=mailpart.decode('utf-8'),
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token=token
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)
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return link
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def clean_db():
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"""Revoves outdated tokens"""
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# cutoff time is set to 24h hours
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# using utcnow() to have no headache with timezones
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cutoff = int(datetime.utcnow().timestamp()) - (24*60*60)
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# Get all tokens older than 24 hours
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oldtokens = ResetToken.objects.all().filter(creation__lt=cutoff)
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for token in oldtokens:
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# delete all tokens older than 24 hours
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token.delete()
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return True
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class Index(FormView):
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template_name = "landing.html"
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form_class = LoginForm
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success_url = 'useroptions.html'
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def form_valid(self, form):
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username = form.cleaned_data.get('username')
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password = form.cleaned_data.get('password')
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user = authenticate(username=username, password=password)
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if user is not None:
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login(self.request, user)
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return render(self.request, 'useroptions.html', { 'user': user } )
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return render(self.request, 'loginfailed.html')
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@cache_control(no_cache=True, must_revalidate=True, no_store=True)
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def get(self, request, *args, **kwargs):
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if self.request.user.is_authenticated:
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return render(self.request, 'useroptions.html',
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{ 'user': self.request.user.username } )
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return super(Index, self).get(request, *args, **kwargs)
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class Register(View):
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def get(self, request):
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return render(request, 'registeruser.html')
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# Someone filled out the register page, do some basic checks and throw it at nameko
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def post(self, request):
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service = 'register an user'
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urlname = 'register'
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username = request.POST.get('username')
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if username == "" or not username:
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return render(request, 'error.html', { 'urlname': urlname, 'service': service, 'error': 'Please supply a username.' } )
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password1 = request.POST.get('password1')
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password2 = request.POST.get('password2')
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if password1 != password2:
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return render(request, 'error.html', { 'urlname': urlname,
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'service': service,
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'error': "Passwords don't match." } )
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email = request.POST.get('email')
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try:
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validate_email(email)
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except ValidationError:
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return render(request, 'error.html', { 'urlname': urlname,
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'service': service,
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'error': 'The supplied email address is invalid.' } )
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firstname = request.POST.get('firstname')
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lastname = request.POST.get('lastname')
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if not firstname or not lastname:
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return render(request, 'error.html', { 'urlname': urlname,
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'service': service,
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'error': 'Please enter your firstname and lastname.' } )
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# so nothing strange happens if there are escapable chars
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pwd = r'%s' % password1
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try:
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creationtime = int(datetime.utcnow().timestamp())
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base_url = "{0}://{1}".format(self.request.scheme,
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self.request.get_host())
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link = activate_account_link(base_url, username, pwd, firstname, lastname, email, creationtime)
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email_from = settings.EMAIL_FROM_ADDRESS
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to = ['%s <%s>' % (username, email)]
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subject = 'Activate your ungleich account'.format(firstname)
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body = 'You can activate your ungleich account account by clicking <a href="{link}">here</a>.' \
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' You can also copy and paste the following link into the address bar of your browser and follow' \
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' the link in order to activate your account.\n\n{link}'.format(link=link)
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# Build the email
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mail = EmailMessage(
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subject=subject,
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body=body,
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from_email=email_from,
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to=to
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)
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mail.send()
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except Exception as e:
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return render(request, 'error.html', { 'urlname': urlname,
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'service': service,
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'error': e } )
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return render(request, 'confirm_email.html')
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class ChangeData(LoginRequiredMixin, View):
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login_url = reverse_lazy('login_index')
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# provide the form for the change request
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def get(self, request):
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urlname = 'change_data'
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service = 'get default data for logged in user'
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user = request.user
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ldap_manager = LdapManager()
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user_exists, entries = ldap_manager.check_user_exists(
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uid=user.username,
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attributes=['uid', 'givenName', 'sn', 'mail'],
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search_base=settings.ENTIRE_SEARCH_BASE
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)
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if user_exists:
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return render(
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request,
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'changeuserdata.html',
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{ 'user': user.username,
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'firstname': entries[0].givenName
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if entries[0].givenName.value is not None else '',
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'lastname': entries[0].sn
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if entries[0].sn.value is not None else '',
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'email': entries[0].mail
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if entries[0].mail.value is not None else ''}
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)
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else:
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return render(request, 'error.html',
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{'urlname': urlname, 'service': service,
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'error': request.user.username})
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# get the change request
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def post(self, request):
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# variables for the error page
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service = 'change user data'
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urlname = 'change_data'
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firstname = request.POST.get('firstname')
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lastname = request.POST.get('lastname')
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email = request.POST.get('email')
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# Some sanity checks for the supplied data
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if firstname == "":
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return render(request, 'error.html', { 'urlname': urlname, 'service': service, 'error': 'Please enter a firstname.' } )
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elif lastname == "":
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return render(request, 'error.html', { 'urlname': urlname, 'service': service, 'error': 'Please enter a lastname.' } )
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elif email == "":
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return render(request, 'error.html', { 'urlname': urlname, 'service': service, 'error': 'Please enter an email.' } )
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try:
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validate_email(email)
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except ValidationError:
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return render(request, 'error.html', { 'urlname': urlname, 'service': service, 'error': 'The supplied email address is invalid.' } )
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ldap_manager = LdapManager()
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result, msg = ldap_manager.change_user_details(
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uid=request.user.username,
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details={"givenName": firstname, "sn": lastname, "mail": email}
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)
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# Data change worked
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if result:
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return render(request, 'changeddata.html', { 'user': request.user.username, 'firstname': firstname, 'lastname': lastname, 'email': email } )
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# Data change did not work, display error
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else:
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return render(request, 'error.html', { 'urlname': urlname, 'service': service, 'error': msg } )
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class ResetPassword(View):
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def get(self, request):
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return render(request, 'resetpassword.html')
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def post(self, request):
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urlname = 'reset_password'
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service = 'send a password reset request'
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user = request.POST.get('user')
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# First, check if the user exists
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ldap_manager = LdapManager()
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user_exists, entries = ldap_manager.check_user_exists(
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uid=user,
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search_base=settings.ENTIRE_SEARCH_BASE,
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attributes=['uid', 'givenName', 'sn', 'mail']
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)
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if user_exists:
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# user exists, so try to get email
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# with get_pool().next() as rpc:
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# (state, tmp1, tmp2, email) = rpc.getuserdata.get_data(user)
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# Either error with the datalookup or no email provided
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email = entries[0].mail.value
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if email is None:
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return render(
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request, 'error.html',
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{'urlname': urlname, 'service': service,
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'error': 'Unable to retrieve email address for user.'}
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)
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base_url = "{0}://{1}".format(self.request.scheme,
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self.request.get_host())
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# Try to send the email out
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emailsend = self.email(user, email, base_url)
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# Email got sent out
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if emailsend == True:
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return render(
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request, 'send_resetrequest.html', {'user': user}
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)
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# Error while trying to send email
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else:
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return render(
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request, 'error.html',
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{'urlname': urlname, 'service': service,
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'error': emailsend}
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)
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else:
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return render(
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request, 'error.html',
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{ 'urlname': urlname, 'service': service,
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'error': 'The user does not exist.' }
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)
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# Sends an email to the user with the 24h active link for a password reset
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def email(self, user, email, base_url):
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# getting epoch for the time now in UTC to spare us headache with timezones
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creationtime = int(datetime.utcnow().timestamp())
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# Construct the data for the email
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email_from = settings.EMAIL_FROM_ADDRESS
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to = ['%s <%s>' % (user, email)]
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subject = 'Password reset request for %s' % user
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link = self.build_reset_link(user, creationtime, base_url)
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body = 'This is an automated email which was triggered by a reset request for the user %s. Please do not reply to this email.\n' % user
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body += 'If you received this email in error, please disregard it. If you get multiple emails like this, please contact us to look into potential abuse.\n'
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body += 'To reset your password, please follow the link below:\n'
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body += '%s\n\n' % link
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body += 'The link will remain active for 24 hours.\n'
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# Build the email
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mail = EmailMessage(
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subject=subject,
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body=body,
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from_email=email_from,
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to=to
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)
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try:
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mail.send()
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result = True
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except:
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result = "An error occurred while trying to send the mail."
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return result
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# Builds the reset link for the email and puts the token into the database
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def build_reset_link(self, user, epochutc, base_url):
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# set up the data
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tokengen = PasswordResetTokenGenerator()
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# create some noise for use in the tokengenerator
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pseudouser = PseudoUser()
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token = tokengen.make_token(pseudouser)
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buser = bytes(user, 'utf-8')
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userpart = b64encode(buser)
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# create entry into the database
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newdbentry = ResetToken(user=user, token=token, creation=epochutc)
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newdbentry.save()
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# set up the link
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link = "{base_url}/reset/{user}/{token}/".format(
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base_url=base_url,user=userpart.decode('utf-8'),token=token
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)
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logger.debug("User reset url is {}".format(link))
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return link
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# Catch the resetrequest URL and check it
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class ResetRequest(View):
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# Gets the URL with user in b64 and the token, and checks it
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# Also cleans the database
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def get(self, request, user=None, token=None):
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# Cleans up outdated tokens
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# If we expect quite a bit of old tokens, maybe somewhere else is better,
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# but for now we don't really expect many unused tokens
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clean_db()
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# If user and token are not supplied by django, it was called from somewhere else, so it's
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# invalid
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if user == None or token == None:
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return HttpResponse('Invalid URL.', status=404)
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# extract user from b64 format
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tmp_user = bytes(user, 'utf-8')
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user = b64decode(tmp_user)
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user_clean = user.decode('utf-8')
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# set checks_out = True if token is found in database
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checks_out = False
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dbentries = ResetToken.objects.all().filter(user=user_clean)
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for entry in dbentries:
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if entry.token == token:
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# found the token, now delete it since it's used
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checks_out = True
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entry.delete()
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# No token was found
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if not checks_out:
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return HttpResponse('Invalid URL.', status=404)
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# Token was found, supply the form
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else:
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return render(request, 'resetpasswordnew.html', { 'user': user_clean } )
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# Gets the post form with the new password and sets it
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def post(self, request):
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service = 'reset the password'
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# get the supplied passwords
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password1 = request.POST.get("password1")
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password2 = request.POST.get("password2")
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# get the hidden value of user
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user = request.POST.get("user")
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# some checks over the supplied data
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if user == "" or not user:
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return render(request, 'error.html', { 'service': service, 'error': 'Something went wrong. Did you use the supplied form?' } )
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if password1 == "" or not password1 or password2 == "" or not password2:
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return render(request, 'error.html', { 'service': service, 'error': 'Please supply a password and confirm it.' } )
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if password1 != password2:
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return render(request, 'error.html', {'service': service, 'error': 'The supplied passwords do not match.'})
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if len(password1) < 8:
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return render(request, 'error.html', {'service': service,
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'error': 'The password is too short, please use a longer one. At least 8 characters.'})
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ldap_manager = LdapManager()
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result = ldap_manager.change_password(
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user,
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password1
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)
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# password change successful
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if result:
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return render(request, 'changedpassword.html', { 'user': user } )
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# Something went wrong while changing the password
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else:
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return render(request, 'error.html', { 'service': service, 'error': result } )
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# The logged in user can change the password here
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class ChangePassword(LoginRequiredMixin, View):
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login_url = reverse_lazy('login_index')
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# Presents the page for a logged in user
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def get(self, request):
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if not request.user.is_authenticated:
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return render(request, 'mustbeloggedin.html')
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return render(request, 'changepassword.html', { 'user': request.user } )
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# Does some checks on the supplied data and changes the password
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def post(self, request):
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# Variables for the error page
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urlname = 'change_password'
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service = 'change the password'
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if not request.user.is_authenticated:
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return render(request, 'mustbeloggedin.html')
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login(request, request.user)
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user = str(request.user)
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oldpassword = request.POST.get('oldpassword')
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check = authenticate(request, username=user, password=oldpassword)
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# Is the right password for the user supplied?
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if check is None:
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return render(request, 'error.html', { 'urlname': urlname, 'service': service, 'error': 'Wrong password for the user.' } )
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password1 = request.POST.get('password1')
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password2 = request.POST.get('password2')
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# Are both passwords from the form the same?
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if password1 != password2:
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return render(request, 'error.html', { 'urlname': urlname, 'service': service,
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'error': 'Please check if you typed the same password both times for the new password' } )
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# Check for password length
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if len(password1) < 8:
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return render(request, 'error.html', { 'urlname': urlname, 'service': service,
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'error': 'The password is too short, please use a longer one. At least 8 characters.' } )
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from .ungleich_ldap import LdapManager
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ldap_manager = LdapManager()
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result = ldap_manager.change_password(
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user,
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password1
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)
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# Password was changed
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if result:
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logout(request)
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return render(request, 'changedpassword.html', { 'user': user } )
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# Password not changed, instead got some kind of error
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else:
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return render(request, 'error.html', { 'urlname': urlname, 'service': service, 'error': result } )
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# Deletes an account
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class DeleteAccount(LoginRequiredMixin, View):
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login_url = reverse_lazy('login_index')
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# Show the basic form for deleting an account
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def get(self, request):
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return render(request, 'deleteaccount.html')
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# Reads the filled out form
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def post(self, request):
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# Variables for error page
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urlname = 'account_delete'
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service = 'delete an account'
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# Does the user exist?
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username = request.POST.get('username')
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ldap_manager = LdapManager()
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user_exists, user_details = ldap_manager.check_user_exists(username)
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if user_exists and request.user.username == username:
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# Do user and password match?
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password = request.POST.get('password')
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pwd = r'%s' % password
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check = authenticate(request, username=username, password=pwd)
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if check is None:
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return render(request, 'error.html',
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{'urlname': urlname, 'service': service,
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'error': 'Wrong password for user.'})
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result = ldap_manager.delete_user(username)
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# User deleted
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if result:
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logout(request)
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return render(request, 'deleteduser.html', {'user': username})
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# User not deleted, got some kind of error
|
|
else:
|
|
return render(request, 'error.html',
|
|
{'urlname': urlname, 'service': service,
|
|
'error': result})
|
|
else:
|
|
return render(request, 'error.html', { 'urlname': urlname, 'service': service, 'error': 'Unknown user.' } )
|
|
|
|
# Log out the session
|
|
class LogOut(View):
|
|
def get(self, request):
|
|
logout(request)
|
|
return HttpResponse(
|
|
"You have been logged out. You will be redirected in 2 seconds."
|
|
"<script>"
|
|
"setTimeout(function (){document.location.href='/';}, 2000);"
|
|
"</script>",
|
|
status=200
|
|
)
|
|
|
|
|
|
|
|
# TO be clarified
|
|
|
|
# To trick the tokengenerator to work with us, because we don't really
|
|
# have the expected user Class since we are reading the user from a form
|
|
# We store the tokens and don't have to use the check function,
|
|
# some one time data works fine.
|
|
|
|
class LastLogin():
|
|
def replace(self, microsecond=0, tzinfo=None):
|
|
return randint(1,100000)
|
|
|
|
class PseudoUser():
|
|
# easiest way to handle the check for lastlogin
|
|
last_login = LastLogin()
|
|
# random alphanumeric strings for primary key and password, just used for token generation
|
|
pk = ''.join(choice(string.ascii_letters + string.digits) for _ in range(20))
|
|
password = ''.join(choice(string.ascii_letters + string.digits) for _ in range(30))
|
|
|
|
|
|
class ActivateAccount(View):
|
|
|
|
def get(self, request, user=None, pwd=None, firstname=None, lastname=None, email=None, token=None):
|
|
clean_db()
|
|
if token is None:
|
|
return HttpResponse('Invalid URL', status=404)
|
|
elem_list = [user, pwd, firstname, lastname, email]
|
|
clean_list = []
|
|
for value in elem_list:
|
|
try:
|
|
value_temp = bytes(value, 'utf-8')
|
|
value_decode = b64decode(value_temp)
|
|
value_clean = value_decode.decode('utf-8')
|
|
clean_list.append(value_clean)
|
|
except Exception as e:
|
|
return HttpResponse('Invalid URL', status=404)
|
|
checks_out = False
|
|
dbentries = ResetToken.objects.all().filter(user=clean_list[0])
|
|
for entry in dbentries:
|
|
if entry.token == token:
|
|
# found the token, now delete it since it's used
|
|
checks_out = True
|
|
entry.delete()
|
|
# No token was found
|
|
if not checks_out:
|
|
return HttpResponse('Invalid URL.', status=404)
|
|
# Token was found, create user
|
|
try:
|
|
ldap_manager = LdapManager()
|
|
ldap_manager.create_user(
|
|
clean_list[0], clean_list[1], clean_list[2], clean_list[3], clean_list[4]
|
|
)
|
|
#Send welcome email
|
|
except Exception as e:
|
|
return render(request, 'error.html', {'urlname': 'register',
|
|
'service': 'register an user',
|
|
'error': e})
|
|
return render(request, 'usercreated.html', { 'user': clean_list[0] } )
|
|
|
|
|
|
class UserCreateAPI(APIView):
|
|
|
|
def post(self, request):
|
|
|
|
username = request.POST.get('username')
|
|
email = request.POST.get('email')
|
|
firstname = request.POST.get('firstname')
|
|
lastname = request.POST.get('lastname')
|
|
|
|
if username == "" or not username:
|
|
return Response('Please supply a username.', 400)
|
|
try:
|
|
validate_email(email)
|
|
except ValidationError:
|
|
return Response('Email is not valid.', 400)
|
|
if not firstname or not lastname:
|
|
return Response('Please provide firstname and lastname', 400)
|
|
|
|
pwd = r'%s' % User.objects.make_random_password()
|
|
|
|
base_url = "{0}://{1}".format(self.request.scheme,
|
|
self.request.get_host())
|
|
creationtime = int(datetime.utcnow().timestamp())
|
|
link = activate_account_link(base_url, username, pwd, firstname, lastname, email. creationtime)
|
|
|
|
# Construct the data for the email
|
|
email_from = settings.EMAIL_FROM_ADDRESS
|
|
to = ['%s <%s>' % (username, email)]
|
|
subject = 'Ungleich account creation.'
|
|
body = 'A request has been sent to our servers to register you as a ungleich user.\n'
|
|
body += 'In order to complete the registration process you must ' \
|
|
'click <a href="{link}">here</a> or copy & paste the following link into the address bar of ' \
|
|
'your browser.\n{link}\n'.format(link=link)
|
|
body += 'Your credentials are:\n'
|
|
body += 'Username: %s\n\n' % username
|
|
body += 'Password: %s\n\n' % pwd
|
|
body += 'We strongly recommend after the activation to log in and change your password.\n'
|
|
body += 'This link will remain active for 24 hours.\n'
|
|
# Build the email
|
|
mail = EmailMessage(
|
|
subject=subject,
|
|
body=body,
|
|
from_email=email_from,
|
|
to=to
|
|
)
|
|
try:
|
|
mail.send()
|
|
except:
|
|
return Response('Failed to send the email', 201)
|
|
return Response('Email with activation link successfully sent', 200)
|
|
|
|
|
|
class SeedRetrieveCreate(APIView):
|
|
def post(self, request):
|
|
try:
|
|
username = request.data['username']
|
|
password = request.data['password']
|
|
realm = request.data['realm']
|
|
except KeyError:
|
|
return Response('You need to specify username, password, and realm values', 400)
|
|
# authenticate the user against ldap
|
|
user = authenticate(username=username, password=password)
|
|
if user is not None:
|
|
req = requests.get(config('OTPSERVER'), data=json.dumps(
|
|
{
|
|
'auth_token': TOTP(config('ADMIN_SEED')).now,
|
|
'auth_name': config('ADMIN_NAME'),
|
|
'auth_realm': 'ungleich-admin'}), headers={'Content-Type': 'application/json'})
|
|
response_data = json.loads(req)
|
|
for elem in response_data:
|
|
if elem['name'] == username and elem['realm'] == realm:
|
|
return Response('Your {} seed is {}'.format(realm, elem['seed']), 200)
|
|
# If doesn't find a match then check if the realm is allowed and create the user
|
|
allowed_realms = config('ALLOWED_REALMS', cast=Csv())
|
|
if realm not in allowed_realms:
|
|
return Response('Not allowed to perform this action.', 403)
|
|
else:
|
|
req = requests.post(config('OTPSERVER'), data=json.dumps(
|
|
{
|
|
'auth_token': TOTP(config('ADMIN_SEED')).now,
|
|
'auth_name': config('ADMIN_NAME'),
|
|
'auth_realm': 'ungleich-admin',
|
|
'name': username,
|
|
'realm': realm
|
|
}), headers={'Content-Type': 'application/json'})
|
|
if req.status_code == 201:
|
|
msg = json.loads(req.text)
|
|
return Response(msg, 201)
|
|
else:
|
|
return Response(json.loads(req.text))
|