providers/samlv2: remove SAMLv2 from master
This commit is contained in:
Jens Langhammer
parent
cc0b8164b0
commit
bd40585247
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@ -1,11 +0,0 @@
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"""passbook saml provider app config"""
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from django.apps import AppConfig
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class PassbookProviderSAMLv2Config(AppConfig):
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"""passbook samlv2 provider app config"""
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name = "passbook.providers.samlv2"
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label = "passbook_providers_samlv2"
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verbose_name = "passbook Providers.SAMLv2"
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mountpoint = "application/samlv2/"
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@ -1,15 +0,0 @@
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"""SAML-related constants"""
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NS_SAML_PROTOCOL = "urn:oasis:names:tc:SAML:2.0:protocol"
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NS_SAML_ASSERTION = "urn:oasis:names:tc:SAML:2.0:assertion"
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NS_SIGNATURE = "http://www.w3.org/2000/09/xmldsig#"
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REQ_KEY_REQUEST = "SAMLRequest"
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REQ_KEY_SIGNATURE = "Signature"
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SESSION_KEY = "passbook_saml_request"
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SAML_ATTRIB_ACS_URL = "AssertionConsumerServiceURL"
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SAML_ATTRIB_DESTINATION = "Destination"
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SAML_ATTRIB_ID = "ID"
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SAML_ATTRIB_ISSUE_INSTANT = "IssueInstant"
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SAML_ATTRIB_PROTOCOL_BINDING = "ProtocolBinding"
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@ -1,83 +0,0 @@
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"""SAML Request Parse/builder"""
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from typing import TYPE_CHECKING, Optional
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from defusedxml import ElementTree
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from signxml import XMLVerifier
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from passbook.crypto.models import CertificateKeyPair
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from passbook.providers.samlv2.saml.constants import (
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NS_SAML_ASSERTION,
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NS_SAML_PROTOCOL,
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SAML_ATTRIB_ACS_URL,
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SAML_ATTRIB_DESTINATION,
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SAML_ATTRIB_ID,
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SAML_ATTRIB_ISSUE_INSTANT,
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SAML_ATTRIB_PROTOCOL_BINDING,
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)
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from passbook.providers.samlv2.saml.utils import decode_base64_and_inflate
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if TYPE_CHECKING:
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from xml.etree.ElementTree import Element # nosec
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# pylint: disable=too-many-instance-attributes
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class SAMLRequest:
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"""SAML Request data class, parse raw base64-encoded data, checks signature and more"""
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_root: "Element"
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acs_url: str
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destination: str
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id: str
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issue_instant: str
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protocol_binding: str
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issuer: str
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is_signed: bool
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_detached_signature: str
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def __init__(self):
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self.acs_url = ""
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self.destination = ""
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# pylint: disable=invalid-name
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self.id = ""
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self.issue_instant = ""
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self.protocol_binding = ""
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@staticmethod
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def parse(raw: str, detached_signature: Optional[str] = None) -> "SAMLRequest":
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"""Prase SAML request from raw string, which can be base64 encoded and deflated.
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Optionally accepts a detached_signature, as from a REDIRECT request."""
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decoded_xml = decode_base64_and_inflate(raw)
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root = ElementTree.fromstring(decoded_xml)
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req = SAMLRequest()
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req._root = root # pylint: disable=protected-access
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# Verify the root element's tag
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_expected_tag = f"{{{NS_SAML_PROTOCOL}}}AuthnRequest"
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if root.tag != _expected_tag:
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raise ValueError(
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f"Invalid root tag, got '{root.tag}', expected '{_expected_tag}."
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)
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req.acs_url = root.attrib[SAML_ATTRIB_ACS_URL]
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req.destination = root.attrib[SAML_ATTRIB_DESTINATION]
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req.id = root.attrib[SAML_ATTRIB_ID]
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req.issue_instant = root.attrib[SAML_ATTRIB_ISSUE_INSTANT]
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req.protocol_binding = root.attrib[SAML_ATTRIB_PROTOCOL_BINDING]
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req.issuer = root.find(f"{{{NS_SAML_ASSERTION}}}Issuer").text
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# Check if this Request is signed
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if detached_signature:
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# pylint: disable=protected-access
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req._detached_signature = detached_signature
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return req
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def verify_signature(self, keypair: CertificateKeyPair):
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"""Verify signature of SAML Request.
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Raises `cryptography.exceptions.InvalidSignature` on validaton failure."""
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verifier = XMLVerifier()
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if self._detached_signature:
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verifier.verify(
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self._detached_signature, x509_cert=keypair.certificate_data
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)
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else:
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verifier.verify(self._root, x509_cert=keypair.certificate_data)
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@ -1,5 +0,0 @@
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"""SAML Provider logic"""
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class SAMLProvider:
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"""SAML Provider"""
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@ -1,24 +0,0 @@
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"""Wrappers to de/encode and de/inflate strings"""
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import base64
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import zlib
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def decode_base64_and_inflate(encoded: str, encoding="utf-8") -> str:
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"""Base64 decode and ZLib decompress b64string"""
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decoded_data = base64.b64decode(encoded)
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try:
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return zlib.decompress(decoded_data, -15).decode(encoding)
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except zlib.error:
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return decoded_data.decode(encoding)
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def deflate_and_base64_encode(inflated: bytes, encoding="utf-8"):
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"""Base64 and ZLib Compress b64string"""
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zlibbed_str = zlib.compress(inflated)
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compressed_string = zlibbed_str[2:-4]
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return base64.b64encode(compressed_string).decode(encoding)
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def nice64(src):
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""" Returns src base64-encoded and formatted nicely for our XML. """
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return base64.b64encode(src).decode("utf-8").replace("\n", "")
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@ -1,35 +0,0 @@
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"""passbook samlv2 URLs"""
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from django.urls import path
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from passbook.providers.samlv2.views import authorize, idp_initiated, slo, sso
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urlpatterns = [
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path(
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"<slug:app_slug>/authorize/",
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authorize.AuthorizeView.as_view(),
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name="authorize",
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),
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path(
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"<slug:app_slug>/sso/redirect/",
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sso.SAMLRedirectBindingView.as_view(),
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name="sso-redirect",
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),
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path(
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"<slug:app_slug>/sso/post/", sso.SAMLPostBindingView.as_view(), name="sso-post",
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),
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path(
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"<slug:app_slug>/slo/redirect/",
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slo.SAMLRedirectBindingView.as_view(),
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name="slo-redirect",
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),
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path(
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"<slug:app_slug>/slo/redirect/",
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slo.SAMLPostBindingView.as_view(),
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name="slo-post",
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),
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path(
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"<slug:app_slug>/initiate/",
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idp_initiated.IDPInitiatedView.as_view(),
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name="initiate",
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),
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]
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@ -1,6 +0,0 @@
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"""SAML Provider authorization view"""
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from django.views.generic import FormView
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class AuthorizeView(FormView):
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"""Authorization view"""
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"""SAML base views"""
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from typing import Optional
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from django.http import HttpRequest, HttpResponse
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from django.shortcuts import get_object_or_404
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from django.views import View
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from passbook.core.models import Application
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from passbook.policies.mixins import PolicyAccessMixin
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from passbook.providers.samlv2.saml.constants import SESSION_KEY
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from passbook.providers.samlv2.saml.parser import SAMLRequest
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class BaseSAMLView(PolicyAccessMixin, View):
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"""Base SAML View to resolve app_slug"""
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application: Application
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def setup(self, request: HttpRequest, *args, **kwargs):
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View.setup(self, request, *args, **kwargs)
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self.application = self.get_application(self.kwargs.get("app_slug"))
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def get_application(self, app_slug: str) -> Optional[Application]:
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"""Return application or raise 404"""
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return get_object_or_404(Application, slug=app_slug)
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def handle_saml_request(self, request: SAMLRequest) -> HttpResponse:
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"""Handle SAML Request"""
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self.request.SESSION[SESSION_KEY] = request
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if self.application.skip_authorization:
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pass
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@ -1,6 +0,0 @@
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"""IDP-Initiated Views"""
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from django.views import View
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class IDPInitiatedView(View):
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"""IDP-initiated Handler"""
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@ -1,10 +0,0 @@
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"""Single Logout Views"""
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from django.views import View
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class SAMLPostBindingView(View):
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"""Handle SAML POST-type Requests"""
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class SAMLRedirectBindingView(View):
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"""Handle SAML Redirect-type Requests"""
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@ -1,41 +0,0 @@
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"""Single Signon Views"""
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from django.http import HttpRequest, HttpResponse, HttpResponseBadRequest
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from passbook.providers.samlv2.saml.constants import REQ_KEY_REQUEST, REQ_KEY_SIGNATURE
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from passbook.providers.samlv2.saml.parser import SAMLRequest
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from passbook.providers.samlv2.views.base import BaseSAMLView
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# SAML Authentication flow in passbook
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# - Parse and Verify SAML Request
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# - Check access to application (this is done after parsing as it might take a few seconds)
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# - Ask for user authorization (if required from Application)
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# - Log Access to audit log
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# - Create response with unique ID to protect against replay
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class SAMLPostBindingView(BaseSAMLView):
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"""Handle SAML POST-type Requests"""
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# pylint: disable=unused-argument
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def post(self, request: HttpRequest, app_slug: str) -> HttpResponse:
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"""Handle POST Requests"""
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if REQ_KEY_REQUEST not in request.POST:
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return HttpResponseBadRequest()
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raw_saml_request = request.POST.get(REQ_KEY_REQUEST)
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detached_signature = request.POST.get(REQ_KEY_SIGNATURE, None)
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srq = SAMLRequest.parse(raw_saml_request, detached_signature)
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return self.handle_saml_request(srq)
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class SAMLRedirectBindingView(BaseSAMLView):
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"""Handle SAML Redirect-type Requests"""
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# pylint: disable=unused-argument
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def get(self, request: HttpRequest, app_slug: str) -> HttpResponse:
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"""Handle GET Requests"""
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if REQ_KEY_REQUEST not in request.GET:
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return HttpResponseBadRequest()
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raw_saml_request = request.GET.get(REQ_KEY_REQUEST)
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detached_signature = request.GET.get(REQ_KEY_SIGNATURE, None)
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srq = SAMLRequest.parse(raw_saml_request, detached_signature)
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return self.handle_saml_request(srq)
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@ -92,7 +92,6 @@ INSTALLED_APPS = [
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"passbook.providers.oauth.apps.PassbookProviderOAuthConfig",
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"passbook.providers.oidc.apps.PassbookProviderOIDCConfig",
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"passbook.providers.saml.apps.PassbookProviderSAMLConfig",
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"passbook.providers.samlv2.apps.PassbookProviderSAMLv2Config",
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"passbook.recovery.apps.PassbookRecoveryConfig",
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"passbook.sources.ldap.apps.PassbookSourceLDAPConfig",
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"passbook.sources.oauth.apps.PassbookSourceOAuthConfig",
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