125 lines
3.7 KiB
Python
125 lines
3.7 KiB
Python
"""passbook proxy models"""
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import string
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from random import SystemRandom
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from typing import Iterable, Optional, Type
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from urllib.parse import urljoin
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from django.db import models
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from django.forms import ModelForm
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from django.http import HttpRequest
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from django.utils.translation import gettext as _
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from passbook.crypto.models import CertificateKeyPair
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from passbook.lib.models import DomainlessURLValidator
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from passbook.outposts.models import OutpostModel
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from passbook.providers.oauth2.constants import (
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SCOPE_OPENID,
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SCOPE_OPENID_EMAIL,
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SCOPE_OPENID_PROFILE,
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)
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from passbook.providers.oauth2.models import (
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ClientTypes,
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JWTAlgorithms,
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OAuth2Provider,
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ResponseTypes,
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ScopeMapping,
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)
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SCOPE_PB_PROXY = "pb_proxy"
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def get_cookie_secret():
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"""Generate random 32-character string for cookie-secret"""
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return "".join(
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SystemRandom().choice(string.ascii_uppercase + string.digits) for _ in range(32)
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)
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def _get_callback_url(uri: str) -> str:
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return urljoin(uri, "/pbprox/callback")
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class ProxyProvider(OutpostModel, OAuth2Provider):
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"""Protect applications that don't support any of the other
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Protocols by using a Reverse-Proxy."""
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internal_host = models.TextField(
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validators=[DomainlessURLValidator(schemes=("http", "https"))]
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)
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external_host = models.TextField(
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validators=[DomainlessURLValidator(schemes=("http", "https"))]
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)
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internal_host_ssl_validation = models.BooleanField(
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default=True,
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help_text=_("Validate SSL Certificates of upstream servers"),
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verbose_name=_("Internal host SSL Validation"),
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)
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skip_path_regex = models.TextField(
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default="",
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blank=True,
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help_text=_(
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(
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"Regular expressions for which authentication is not required. "
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"Each new line is interpreted as a new Regular Expression."
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)
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),
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)
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certificate = models.ForeignKey(
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CertificateKeyPair, on_delete=models.SET_NULL, null=True, blank=True,
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)
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cookie_secret = models.TextField(default=get_cookie_secret)
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@property
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def form(self) -> Type[ModelForm]:
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from passbook.providers.proxy.forms import ProxyProviderForm
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return ProxyProviderForm
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@property
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def launch_url(self) -> Optional[str]:
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"""Use external_host as launch URL"""
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return self.external_host
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def html_setup_urls(self, request: HttpRequest) -> Optional[str]:
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"""Overwrite Setup URLs as they are not needed for proxy"""
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return None
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def set_oauth_defaults(self):
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"""Ensure all OAuth2-related settings are correct"""
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self.client_type = ClientTypes.CONFIDENTIAL
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self.response_type = ResponseTypes.CODE
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self.jwt_alg = JWTAlgorithms.RS256
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self.rsa_key = CertificateKeyPair.objects.first()
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scopes = ScopeMapping.objects.filter(
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scope_name__in=[
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SCOPE_OPENID,
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SCOPE_OPENID_PROFILE,
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SCOPE_OPENID_EMAIL,
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SCOPE_PB_PROXY,
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]
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)
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self.property_mappings.set(scopes)
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self.redirect_uris = "\n".join(
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[
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_get_callback_url(self.external_host),
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_get_callback_url(self.internal_host),
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]
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)
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def __str__(self):
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return f"Proxy Provider {self.name}"
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def get_required_objects(self) -> Iterable[models.Model]:
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required_models = [self]
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if self.certificate is not None:
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required_models.append(self.certificate)
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return required_models
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class Meta:
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verbose_name = _("Proxy Provider")
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verbose_name_plural = _("Proxy Providers")
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