240 lines
9 KiB
Python
240 lines
9 KiB
Python
"""passbook core authentication views"""
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from typing import Dict, Optional
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from django.contrib import messages
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from django.contrib.auth import login, logout
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from django.contrib.auth.mixins import LoginRequiredMixin, UserPassesTestMixin
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from django.forms.utils import ErrorList
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from django.http import HttpRequest, HttpResponse
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from django.shortcuts import get_object_or_404, redirect, reverse
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from django.utils.translation import ugettext as _
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from django.views import View
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from django.views.generic import FormView
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from structlog import get_logger
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from passbook.core.forms.authentication import LoginForm, SignUpForm
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from passbook.core.models import Invitation, Nonce, Source, User
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from passbook.core.signals import invitation_used, user_signed_up
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from passbook.factors.password.exceptions import PasswordPolicyInvalid
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from passbook.factors.view import AuthenticationView, _redirect_with_qs
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from passbook.lib.config import CONFIG
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LOGGER = get_logger()
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class LoginView(UserPassesTestMixin, FormView):
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"""Allow users to sign in"""
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template_name = "login/form.html"
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form_class = LoginForm
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success_url = "."
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# Allow only not authenticated users to login
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def test_func(self):
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return self.request.user.is_authenticated is False
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def handle_no_permission(self):
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if "next" in self.request.GET:
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return redirect(self.request.GET.get("next"))
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return redirect(reverse("passbook_core:overview"))
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def get_context_data(self, **kwargs):
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kwargs["config"] = CONFIG.y("passbook")
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kwargs["is_login"] = True
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kwargs["title"] = _("Log in to your account")
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kwargs["primary_action"] = _("Log in")
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kwargs["show_sign_up_notice"] = CONFIG.y("passbook.sign_up.enabled")
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kwargs["sources"] = []
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sources = Source.objects.filter(enabled=True).select_subclasses()
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for source in sources:
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login_button = source.login_button
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if login_button:
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kwargs["sources"].append(login_button)
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if kwargs["sources"]:
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self.template_name = "login/with_sources.html"
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return super().get_context_data(**kwargs)
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def get_user(self, uid_value) -> Optional[User]:
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"""Find user instance. Returns None if no user was found."""
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for search_field in CONFIG.y("passbook.uid_fields"):
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# Workaround for E-Mail -> email
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if search_field == "e-mail":
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search_field = "email"
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users = User.objects.filter(**{search_field: uid_value})
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if users.exists():
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LOGGER.debug("Found user", user=users.first(), uid_field=search_field)
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return users.first()
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return None
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def form_valid(self, form: LoginForm) -> HttpResponse:
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"""Form data is valid"""
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pre_user = self.get_user(form.cleaned_data.get("uid_field"))
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if not pre_user:
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# No user found
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return self.invalid_login(self.request)
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self.request.session[AuthenticationView.SESSION_PENDING_USER] = pre_user.pk
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return _redirect_with_qs("passbook_core:auth-process", self.request.GET)
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def invalid_login(
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self, request: HttpRequest, disabled_user: User = None
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) -> HttpResponse:
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"""Handle login for disabled users/invalid login attempts"""
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LOGGER.debug("invalid_login", user=disabled_user)
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messages.error(request, _("Failed to authenticate."))
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return self.render_to_response(self.get_context_data())
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class LogoutView(LoginRequiredMixin, View):
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"""Log current user out"""
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def dispatch(self, request):
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"""Log current user out"""
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logout(request)
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messages.success(request, _("You've successfully been logged out."))
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return redirect(reverse("passbook_core:auth-login"))
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class SignUpView(UserPassesTestMixin, FormView):
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"""Sign up new user, optionally consume one-use invitation link."""
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template_name = "login/form.html"
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form_class = SignUpForm
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success_url = "."
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# Invitation instance, if invitation link was used
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_invitation = None
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# Instance of newly created user
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_user = None
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# Allow only not authenticated users to login
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def test_func(self):
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return self.request.user.is_authenticated is False
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def handle_no_permission(self):
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return redirect(reverse("passbook_core:overview"))
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def dispatch(self, request, *args, **kwargs):
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"""Check if sign-up is enabled or invitation link given"""
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allowed = False
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if "invitation" in request.GET:
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invitations = Invitation.objects.filter(uuid=request.GET.get("invitation"))
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allowed = invitations.exists()
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if allowed:
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self._invitation = invitations.first()
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if CONFIG.y("passbook.sign_up.enabled"):
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allowed = True
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if not allowed:
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messages.error(request, _("Sign-ups are currently disabled."))
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return redirect(reverse("passbook_core:auth-login"))
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return super().dispatch(request, *args, **kwargs)
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def get_initial(self):
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if self._invitation:
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initial = {}
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if self._invitation.fixed_username:
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initial["username"] = self._invitation.fixed_username
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if self._invitation.fixed_email:
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initial["email"] = self._invitation.fixed_email
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return initial
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return super().get_initial()
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def get_context_data(self, **kwargs):
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kwargs["config"] = CONFIG.y("passbook")
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kwargs["is_login"] = True
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kwargs["title"] = _("Sign Up")
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kwargs["primary_action"] = _("Sign up")
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return super().get_context_data(**kwargs)
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def form_valid(self, form: SignUpForm) -> HttpResponse:
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"""Create user"""
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try:
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self._user = SignUpView.create_user(form.cleaned_data, self.request)
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except PasswordPolicyInvalid as exc:
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# Manually inject error into form
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# pylint: disable=protected-access
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errors = form._errors.setdefault("password", ErrorList())
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for error in exc.messages:
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errors.append(error)
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return self.form_invalid(form)
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self.consume_invitation()
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messages.success(self.request, _("Successfully signed up!"))
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LOGGER.debug("Successfully signed up", email=form.cleaned_data.get("email"))
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return redirect(reverse("passbook_core:auth-login"))
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def consume_invitation(self):
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"""Consume invitation if an invitation was used"""
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if self._invitation:
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invitation_used.send(
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sender=self,
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request=self.request,
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invitation=self._invitation,
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user=self._user,
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)
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self._invitation.delete()
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@staticmethod
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def create_user(data: Dict, request: HttpRequest = None) -> User:
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"""Create user from data
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Args:
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data: Dictionary as returned by SignUpForm's cleaned_data
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request: Optional current request.
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Returns:
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The user created
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Raises:
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PasswordPolicyInvalid: if any policy are not fulfilled.
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This also deletes the created user.
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"""
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# Create user
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new_user = User.objects.create(
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username=data.get("username"),
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email=data.get("email"),
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name=data.get("name"),
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)
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new_user.is_active = True
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try:
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new_user.set_password(data.get("password"))
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new_user.save()
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request.user = new_user
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# Send signal for other auth sources
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user_signed_up.send(sender=SignUpView, user=new_user, request=request)
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return new_user
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except PasswordPolicyInvalid as exc:
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new_user.delete()
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raise exc
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class SignUpConfirmView(View):
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"""Confirm registration from Nonce"""
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def get(self, request, nonce):
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"""Verify UUID and activate user"""
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nonce = get_object_or_404(Nonce, uuid=nonce)
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nonce.user.is_active = True
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nonce.user.save()
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# Workaround: hardcoded reference to ModelBackend, needs testing
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nonce.user.backend = "django.contrib.auth.backends.ModelBackend"
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login(request, nonce.user)
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nonce.delete()
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messages.success(request, _("Successfully confirmed registration."))
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return redirect("passbook_core:overview")
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class PasswordResetView(View):
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"""Temporarily authenticate User and allow them to reset their password"""
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def get(self, request, nonce):
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"""Authenticate user with nonce and redirect to password change view"""
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# 3. (Optional) Trap user in password change view
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nonce = get_object_or_404(Nonce, uuid=nonce)
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# Workaround: hardcoded reference to ModelBackend, needs testing
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nonce.user.backend = "django.contrib.auth.backends.ModelBackend"
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login(request, nonce.user)
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nonce.delete()
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messages.success(
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request,
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_(("Temporarily authenticated with Nonce, " "please change your password")),
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)
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return redirect("passbook_core:user-change-password")
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