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authentik/passbook/outposts/models.py

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"""Outpost models"""
from dataclasses import asdict, dataclass
from datetime import datetime
from json import dumps, loads
from typing import Iterable, Optional
from uuid import uuid4
from dacite import from_dict
from django.contrib.postgres.fields import ArrayField
from django.core.cache import cache
from django.db import models
from django.db.models.base import Model
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from django.utils.translation import gettext_lazy as _
from guardian.shortcuts import assign_perm
from passbook.core.models import Provider, Token, TokenIntents, User
from passbook.lib.config import CONFIG
@dataclass
class OutpostConfig:
"""Configuration an outpost uses to configure it self"""
passbook_host: str
passbook_host_insecure: bool = False
log_level: str = CONFIG.y("log_level")
error_reporting_enabled: bool = CONFIG.y_bool("error_reporting.enabled")
error_reporting_environment: str = CONFIG.y(
"error_reporting.environment", "customer"
)
class OutpostModel(Model):
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"""Base model for providers that need more objects than just themselves"""
def get_required_objects(self) -> Iterable[models.Model]:
"""Return a list of all required objects"""
return [self]
class Meta:
abstract = True
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class OutpostType(models.TextChoices):
"""Outpost types, currently only the reverse proxy is available"""
PROXY = "proxy"
class OutpostDeploymentType(models.TextChoices):
"""Deployment types that are managed through passbook"""
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# KUBERNETES = "kubernetes"
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CUSTOM = "custom"
def default_outpost_config():
"""Get default outpost config"""
return asdict(OutpostConfig(passbook_host=""))
class Outpost(models.Model):
"""Outpost instance which manages a service user and token"""
uuid = models.UUIDField(default=uuid4, editable=False, primary_key=True)
name = models.TextField()
type = models.TextField(choices=OutpostType.choices, default=OutpostType.PROXY)
deployment_type = models.TextField(
choices=OutpostDeploymentType.choices,
default=OutpostDeploymentType.CUSTOM,
help_text=_(
"Select between passbook-managed deployment types or a custom deployment."
),
)
_config = models.JSONField(default=default_outpost_config)
providers = models.ManyToManyField(Provider)
channels = ArrayField(models.TextField(), default=list)
@property
def config(self) -> OutpostConfig:
"""Load config as OutpostConfig object"""
return from_dict(OutpostConfig, loads(self._config))
@config.setter
def config(self, value):
"""Dump config into json"""
self._config = dumps(asdict(value))
@property
def health_cache_key(self) -> str:
"""Key by which the outposts health status is saved"""
return f"outpost_{self.uuid.hex}_health"
@property
def health(self) -> Optional[datetime]:
"""Get outpost's health status"""
key = self.health_cache_key
value = cache.get(key, None)
if value:
return datetime.fromtimestamp(value)
return None
def _create_user(self) -> User:
"""Create user and assign permissions for all required objects"""
user: User = User.objects.create(username=f"pb-outpost-{self.uuid.hex}")
user.set_unusable_password()
user.save()
for model in self.get_required_objects():
assign_perm(
f"{model._meta.app_label}.view_{model._meta.model_name}", user, model
)
return user
@property
def user(self) -> User:
"""Get/create user with access to all required objects"""
user = User.objects.filter(username=f"pb-outpost-{self.uuid.hex}")
if user.exists():
return user.first()
return self._create_user()
@property
def token(self) -> Token:
"""Get/create token for auto-generated user"""
token = Token.filter_not_expired(user=self.user, intent=TokenIntents.INTENT_API)
if token.exists():
return token.first()
return Token.objects.create(
user=self.user,
intent=TokenIntents.INTENT_API,
description=f"Autogenerated by passbook for Outpost {self.name}",
expiring=False,
)
def get_required_objects(self) -> Iterable[models.Model]:
"""Get an iterator of all objects the user needs read access to"""
objects = [self]
for provider in (
Provider.objects.filter(outpost=self).select_related().select_subclasses()
):
if isinstance(provider, OutpostModel):
objects.extend(provider.get_required_objects())
else:
objects.append(provider)
return objects
def __str__(self) -> str:
return f"Outpost {self.name}"