authentik/passbook/policies/expiry/models.py

"""passbook password_expiry_policy Models"""
from datetime import timedelta
from typing import Type

from django.db import models
from django.forms import ModelForm
from django.utils.timezone import now
from django.utils.translation import gettext as _
from rest_framework.serializers import BaseSerializer
from structlog import get_logger

from passbook.policies.models import Policy
from passbook.policies.types import PolicyRequest, PolicyResult

LOGGER = get_logger()


class PasswordExpiryPolicy(Policy):
    """If password change date is more than x days in the past, invalidate the user's password
    and show a notice"""

    deny_only = models.BooleanField(default=False)
    days = models.IntegerField()

    @property
    def serializer(self) -> BaseSerializer:
        from passbook.policies.expiry.api import PasswordExpiryPolicySerializer

        return PasswordExpiryPolicySerializer

    @property
    def form(self) -> Type[ModelForm]:
        from passbook.policies.expiry.forms import PasswordExpiryPolicyForm

        return PasswordExpiryPolicyForm

    def passes(self, request: PolicyRequest) -> PolicyResult:
        """If password change date is more than x days in the past, call set_unusable_password
        and show a notice"""
        actual_days = (now() - request.user.password_change_date).days
        days_since_expiry = (
            now() - (request.user.password_change_date + timedelta(days=self.days))
        ).days
        if actual_days >= self.days:
            if not self.deny_only:
                request.user.set_unusable_password()
                request.user.save()
                message = _(
                    (
                        "Password expired %(days)d days ago. "
                        "Please update your password."
                    )
                    % {"days": days_since_expiry}
                )
                return PolicyResult(False, message)
            return PolicyResult(False, _("Password has expired."))
        return PolicyResult(True)

    class Meta:

        verbose_name = _("Password Expiry Policy")
        verbose_name_plural = _("Password Expiry Policies")