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#!/usr/bin/env python
# -*- coding: utf-8 -*-
#
# Copyright (C) 2010-2011 Umeå University
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""
Contains classes used in the SAML ECP profile
"""
from saml2 import element_to_extension_element
from saml2 import samlp
from saml2 import soap
from saml2 import BINDING_SOAP, BINDING_PAOS
from saml2.profile import paos
from saml2.profile import ecp
#from saml2.client import Saml2Client
from saml2.server import Server
from saml2.schema import soapenv
from saml2.s_utils import sid
from saml2.response import authn_response
SERVICE = "urn:oasis:names:tc:SAML:2.0:profiles:SSO:ecp"
def ecp_capable(headers):
if "application/vnd.paos+xml" in headers["Accept"]:
if "PAOS" in headers:
if 'ver="%s";"%s"' % (paos.NAMESPACE,
SERVICE) in headers["PAOS"]:
return True
return False
ACTOR = "http://schemas.xmlsoap.org/soap/actor/next"
#noinspection PyUnusedLocal
def ecp_auth_request(cls, entityid=None, relay_state="",
log=None, sign=False):
""" Makes an authentication request.
:param entityid: The entity ID of the IdP to send the request to
:param relay_state: To where the user should be returned after
successfull log in.
:param log: Where to write log messages
:param sign: Whether the request should be signed or not.
:return: AuthnRequest response
"""
eelist = []
# ----------------------------------------
# <paos:Request>
# ----------------------------------------
my_url = cls.service_url(BINDING_PAOS)
# must_understan and actor according to the standard
#
paos_request = paos.Request(must_understand="1", actor=ACTOR,
response_consumer_url=my_url,
service = SERVICE)
eelist.append(element_to_extension_element(paos_request))
# ----------------------------------------
# <ecp:Request>
# ----------------------------------------
# idp = samlp.IDPEntry(
# provider_id = "https://idp.example.org/entity",
# name = "Example identity provider",
# loc = "https://idp.example.org/saml2/sso",
# )
#
# idp_list = samlp.IDPList(idp_entry= [idp])
#
# ecp_request = ecp.Request(actor = ACTOR, must_understand = "1",
# provider_name = "Example Service Provider",
# issuer=saml.Issuer(text="https://sp.example.org/entity"),
# idp_list = idp_list)
#
# eelist.append(element_to_extension_element(ecp_request))
# ----------------------------------------
# <ecp:RelayState>
# ----------------------------------------
relay_state = ecp.RelayState(actor=ACTOR, must_understand="1",
text=relay_state)
eelist.append(element_to_extension_element(relay_state))
header = soapenv.Header()
header.extension_elements = eelist
# ----------------------------------------
# <samlp:AuthnRequest>
# ----------------------------------------
if log:
log.info("entityid: %s, binding: %s" % (entityid, BINDING_SOAP))
location = cls._sso_location(entityid, binding=BINDING_SOAP)
session_id = sid()
authn_req = cls._authn_request(session_id, location, log=log,
binding=BINDING_PAOS,
service_url_binding=BINDING_PAOS)
body = soapenv.Body()
body.extension_elements = [element_to_extension_element(authn_req)]
# ----------------------------------------
# The SOAP envelope
# ----------------------------------------
soap_envelope = soapenv.Envelope(header=header, body=body)
return session_id, "%s" % soap_envelope
def handle_ecp_authn_response(cls, soap_message, outstanding=None):
rdict = soap.class_instances_from_soap_enveloped_saml_thingies(
soap_message,
[paos, ecp,
samlp])
_relay_state = None
for item in rdict["header"]:
if item.c_tag == "RelayState" and \
item.c_namespace == ecp.NAMESPACE:
_relay_state = item
response = authn_response(cls.config, cls.service_url(),
outstanding, log=cls.logger,
debug=cls.debug,
allow_unsolicited=True)
response.loads("%s" % rdict["body"], False, soap_message)
response.verify()
cls.users.add_information_about_person(response.session_info())
return response, _relay_state
def ecp_response(target_url, response):
# ----------------------------------------
# <ecp:Response
# ----------------------------------------
ecp_response = ecp.Response(assertion_consumer_service_url=target_url)
header = soapenv.Header()
header.extension_elements = [element_to_extension_element(ecp_response)]
# ----------------------------------------
# <samlp:Response
# ----------------------------------------
body = soapenv.Body()
body.extension_elements = [element_to_extension_element(response)]
soap_envelope = soapenv.Envelope(header=header, body=body)
return "%s" % soap_envelope
class ECPServer(Server):
""" This deals with what the IdP has to do
TODO: Still tentative
"""
def __init__(self, config_file="", config=None, _cache="",
log=None, debug=0):
Server.__init__(self, config_file, config, _cache, log, debug)
def parse_ecp_authn_query(self):
pass
def ecp_response(self):
# ----------------------------------------
# <ecp:Response
# ----------------------------------------
target_url = ""
ecp_response = ecp.Response(assertion_consumer_service_url=target_url)
header = soapenv.Body()
header.extension_elements = [element_to_extension_element(ecp_response)]
# ----------------------------------------
# <samlp:Response
# ----------------------------------------
response = samlp.Response()
body = soapenv.Body()
body.extension_elements = [element_to_extension_element(response)]
soap_envelope = soapenv.Envelope(header=header, body=body)
return "%s" % soap_envelope
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