def handle_authn_request(self, saml_request, relay_state, binding, userid):
self.authn_req = self.idp.parse_authn_request(saml_request, binding)
_encrypt_cert = encrypt_cert_from_item(self.authn_req.message)
self.binding_out, self.destination = self.idp.pick_binding(
"assertion_consumer_service",
bindings=None,
entity_id=self.authn_req.message.issuer.text,
request=self.authn_req.message)
resp_args = self.idp.response_args(self.authn_req.message)
AUTHN_BROKER = AuthnBroker()
AUTHN_BROKER.add(authn_context_class_ref(PASSWORD),
username_password_authn_dummy,
10,
"http://test.idp.se")
AUTHN_BROKER.get_authn_by_accr(PASSWORD)
resp_args["authn"] = AUTHN_BROKER.get_authn_by_accr(PASSWORD)
_resp = self.idp.create_authn_response(TestIdP.USERS[userid],
userid=userid,
encrypt_cert=_encrypt_cert,
encrypt_assertion_self_contained=True,
encrypted_advice_attributes=True,
**resp_args)
kwargs = {}
http_args = self.idp.apply_binding(BINDING_HTTP_POST,
"%s" % _resp,
self.destination,
relay_state,
response=True,
**kwargs)
action, body = get_post_action_body(http_args["data"][3])
return action, urllib.urlencode(body)
def outgoing(self, response, org_response, instance):
"""
An authentication response has been received and now an authentication
response from this server should be constructed.
:param response: The Authentication response
:param instance: SP instance that received the authentication response
:return: response
"""
_idp = self.create_SamlIDP(instance.environ, instance.start_response, self.outgoing)
_state = instance.sp.state[response.in_response_to]
orig_authn_req, relay_state, req_args = instance.sp.state[_state]
# The Subject NameID
try:
subject = response.get_subject()
except:
pass
resp_args = _idp.idp.response_args(orig_authn_req)
try:
_authn_info = response.authn_info()[0]
AUTHN_BROKER = AuthnBroker()
AUTHN_BROKER.add(authn_context_class_ref(_authn_info[0]), username_password_authn_dummy, 0, self.issuer)
_authn = AUTHN_BROKER.get_authn_by_accr(_authn_info[0])
#_authn = {"class_ref": _authn_info[0], "authn_auth": self.issuer}
except:
AUTHN_BROKER = AuthnBroker()
AUTHN_BROKER.add(authn_context_class_ref(UNSPECIFIED), username_password_authn_dummy, 0, self.issuer)
_authn = AUTHN_BROKER.get_authn_by_accr(UNSPECIFIED)
identity = response.ava
if identity is None and response.response.encrypted_assertion is not None:
#Add dummy value
identity = {"uid": "dummyuser"}
# Will signed the response by default
resp = _idp.construct_authn_response(identity, userid="dummyuser",
authn=_authn, name_id=None, resp_args=resp_args,
relay_state=relay_state, sign_response=True,
org_resp=response, org_xml_response=org_response)
return resp
def get_authn(self, req_info=None):
if req_info:
req_authn_context = req_info.message.requested_authn_context
else:
req_authn_context = PASSWORD
broker = AuthnBroker()
broker.add(authn_context_class_ref(req_authn_context), "")
return broker.get_authn_by_accr(req_authn_context)
def handle_auth_req(self, saml_request, relay_state, binding, userid,
response_binding=BINDING_HTTP_POST):
"""
Handles a SAML request, validates and creates a SAML response.
:type saml_request: str
:type relay_state: str
:type binding: str
:type userid: str
:rtype:
:param saml_request:
:param relay_state: RelayState is a parameter used by some SAML protocol implementations to
identify the specific resource at the resource provider in an IDP initiated single sign on
scenario.
:param binding:
:param userid: The user identification.
:return: A tuple with
"""
auth_req = self.parse_authn_request(saml_request, binding)
binding_out, destination = self.pick_binding(
'assertion_consumer_service',
bindings=[response_binding],
entity_id=auth_req.message.issuer.text, request=auth_req.message)
resp_args = self.response_args(auth_req.message)
authn_broker = AuthnBroker()
authn_broker.add(authn_context_class_ref(PASSWORD), lambda: None, 10,
'unittest_idp.xml')
authn_broker.get_authn_by_accr(PASSWORD)
resp_args['authn'] = authn_broker.get_authn_by_accr(PASSWORD)
_resp = self.create_authn_response(self.user_db[userid],
userid=userid,
**resp_args)
if response_binding == BINDING_HTTP_POST:
saml_response = base64.b64encode(str(_resp).encode("utf-8"))
resp = {"SAMLResponse": saml_response, "RelayState": relay_state}
elif response_binding == BINDING_HTTP_REDIRECT:
http_args = self.apply_binding(response_binding, '%s' % _resp,
destination, relay_state, response=True)
resp = dict(parse_qsl(urlparse(dict(http_args["headers"])["Location"]).query))
return destination, resp
def __create_authn_response(self,
saml_request,
relay_state,
binding,
userid,
response_binding=BINDING_HTTP_POST):
"""
Handles a SAML request, validates and creates a SAML response but
does not apply the binding to encode it.
:type saml_request: str
:type relay_state: str
:type binding: str
:type userid: str
:rtype: tuple [string, saml2.samlp.Response]
:param saml_request:
:param relay_state: RelayState is a parameter used by some SAML
protocol implementations to identify the specific resource at the
resource provider in an IDP initiated single sign on scenario.
:param binding:
:param userid: The user identification.
:return: A tuple containing the destination and instance of
saml2.samlp.Response
"""
auth_req = self.parse_authn_request(saml_request, binding)
binding_out, destination = self.pick_binding(
'assertion_consumer_service',
bindings=[response_binding],
entity_id=auth_req.message.issuer.text,
request=auth_req.message)
resp_args = self.response_args(auth_req.message)
authn_broker = AuthnBroker()
authn_broker.add(authn_context_class_ref(PASSWORD), lambda: None, 10,
'unittest_idp.xml')
authn_broker.get_authn_by_accr(PASSWORD)
resp_args['authn'] = authn_broker.get_authn_by_accr(PASSWORD)
resp = self.create_authn_response(self.user_db[userid],
userid=userid,
**resp_args)
return destination, resp
def __create_authn_response(self, saml_request, relay_state, binding,
userid, response_binding=BINDING_HTTP_POST):
"""
Handles a SAML request, validates and creates a SAML response but
does not apply the binding to encode it.
:type saml_request: str
:type relay_state: str
:type binding: str
:type userid: str
:rtype: tuple [string, saml2.samlp.Response]
:param saml_request:
:param relay_state: RelayState is a parameter used by some SAML
protocol implementations to identify the specific resource at the
resource provider in an IDP initiated single sign on scenario.
:param binding:
:param userid: The user identification.
:return: A tuple containing the destination and instance of
saml2.samlp.Response
"""
auth_req = self.parse_authn_request(saml_request, binding)
binding_out, destination = self.pick_binding(
'assertion_consumer_service',
bindings=[response_binding],
entity_id=auth_req.message.issuer.text, request=auth_req.message)
resp_args = self.response_args(auth_req.message)
authn_broker = AuthnBroker()
authn_broker.add(authn_context_class_ref(PASSWORD), lambda: None, 10,
'unittest_idp.xml')
authn_broker.get_authn_by_accr(PASSWORD)
resp_args['authn'] = authn_broker.get_authn_by_accr(PASSWORD)
resp = self.create_authn_response(self.user_db[userid],
userid=userid,
**resp_args)
return destination, resp
def handle_auth_req(self, saml_request, relay_state, binding, userid):
auth_req = self.parse_authn_request(saml_request, binding)
binding_out, destination = self.pick_binding(
'assertion_consumer_service',
entity_id=auth_req.message.issuer.text, request=auth_req.message)
resp_args = self.response_args(auth_req.message)
authn_broker = AuthnBroker()
authn_broker.add(authn_context_class_ref(PASSWORD), lambda: None, 10,
'unittest_idp.xml')
authn_broker.get_authn_by_accr(PASSWORD)
resp_args['authn'] = authn_broker.get_authn_by_accr(PASSWORD)
_resp = self.create_authn_response(self.user_db[userid],
userid=userid,
**resp_args)
http_args = self.apply_binding(BINDING_HTTP_POST, '%s' % _resp,
destination, relay_state, response=True)
url = http_args['url']
saml_response = base64.b64encode(str(_resp).encode("utf-8"))
resp = {'SAMLResponse': saml_response, 'RelayState': relay_state}
return url, resp
def get(self, request, *args, **kwargs):
passed_data = request.POST if request.method == 'POST' else request.GET
# get sp information from the parameters
try:
sp_entity_id = passed_data['sp']
except KeyError as excp:
return self.handle_error(request, exception=excp, status=400)
try:
sp_config = settings.SAML_IDP_SPCONFIG[sp_entity_id]
except Exception:
return self.handle_error(
request,
exception=ImproperlyConfigured(
"No config for SP %s defined in SAML_IDP_SPCONFIG" %
sp_entity_id),
status=400)
binding_out, destination = self.IDP.pick_binding(
service="assertion_consumer_service", entity_id=sp_entity_id)
processor = self.get_processor(sp_entity_id, sp_config)
# Check if user has access to the service of this SP
if not processor.has_access(request):
return self.handle_error(
request,
exception=PermissionDenied(
"You do not have access to this resource"),
status=403)
identity = self.get_identity(processor, request.user, sp_config)
req_authn_context = PASSWORD
AUTHN_BROKER = AuthnBroker()
AUTHN_BROKER.add(authn_context_class_ref(req_authn_context), "")
user_id = processor.get_user_id(request.user)
# Construct SamlResponse messages
try:
name_id_formats = self.IDP.config.getattr(
"name_id_format", "idp") or [NAMEID_FORMAT_UNSPECIFIED]
name_id = NameID(format=name_id_formats[0], text=user_id)
authn = AUTHN_BROKER.get_authn_by_accr(req_authn_context)
sign_response = self.IDP.config.getattr("sign_response",
"idp") or False
sign_assertion = self.IDP.config.getattr("sign_assertion",
"idp") or False
authn_resp = self.IDP.create_authn_response(
identity=identity,
in_response_to=None,
destination=destination,
sp_entity_id=sp_entity_id,
userid=user_id,
name_id=name_id,
authn=authn,
sign_response=sign_response,
sign_assertion=sign_assertion,
**passed_data)
except Exception as excp:
return self.handle_error(request, exception=excp, status=500)
# Return as html with self-submitting form.
http_args = self.IDP.apply_binding(
binding=binding_out,
msg_str="%s" % authn_resp,
destination=destination,
relay_state=passed_data['RelayState'],
response=True)
return HttpResponse(http_args['data'])
def get(self, request, *args, **kwargs):
binding = request.session.get('Binding', BINDING_HTTP_POST)
# Parse incoming request
try:
req_info = self.IDP.parse_authn_request(
request.session['SAMLRequest'], binding)
except Exception as excp:
return self.handle_error(request, exception=excp)
# Signed request for HTTP-REDIRECT
if "SigAlg" in request.session and "Signature" in request.session:
_certs = self.IDP.metadata.certs(req_info.message.issuer.text,
"any", "signing")
verified_ok = False
for cert in _certs:
# TODO implement
# if verify_redirect_signature(_info, self.IDP.sec.sec_backend, cert):
# verified_ok = True
# break
pass
if not verified_ok:
return self.handle_error(
request,
extra_message="Message signature verification failure",
status=400)
# Gather response arguments
try:
resp_args = self.IDP.response_args(req_info.message)
except (UnknownPrincipal, UnsupportedBinding) as excp:
return self.handle_error(request, exception=excp, status=400)
try:
sp_config = settings.SAML_IDP_SPCONFIG[resp_args['sp_entity_id']]
except Exception:
return self.handle_error(
request,
exception=ImproperlyConfigured(
"No config for SP %s defined in SAML_IDP_SPCONFIG" %
resp_args['sp_entity_id']),
status=400)
processor = self.get_processor(resp_args['sp_entity_id'], sp_config)
# Check if user has access to the service of this SP
if not processor.has_access(request):
return self.handle_error(
request,
exception=PermissionDenied(
"You do not have access to this resource"),
status=403)
identity = self.get_identity(processor, request.user, sp_config)
req_authn_context = req_info.message.requested_authn_context or PASSWORD
AUTHN_BROKER = AuthnBroker()
AUTHN_BROKER.add(authn_context_class_ref(req_authn_context), "")
user_id = processor.get_user_id(request.user)
# Construct SamlResponse message
try:
authn_resp = self.IDP.create_authn_response(
identity=identity,
userid=user_id,
name_id=NameID(format=resp_args['name_id_policy'].format,
sp_name_qualifier=resp_args['sp_entity_id'],
text=user_id),
authn=AUTHN_BROKER.get_authn_by_accr(req_authn_context),
sign_response=self.IDP.config.getattr("sign_response", "idp")
or False,
sign_assertion=self.IDP.config.getattr("sign_assertion", "idp")
or False,
**resp_args)
except Exception as excp:
return self.handle_error(request, exception=excp, status=500)
http_args = self.IDP.apply_binding(
binding=resp_args['binding'],
msg_str="%s" % authn_resp,
destination=resp_args['destination'],
relay_state=request.session['RelayState'],
response=True)
logger.debug('http args are: %s' % http_args)
return self.render_response(request, processor, http_args)
def login_process(request):
""" View which processes the actual SAML request and returns a self-submitting form with the SAML response.
The login_required decorator ensures the user authenticates first on the IdP using 'normal' ways.
"""
# Construct server with config from settings dict
conf = IdPConfig()
conf.load(copy.deepcopy(settings.SAML_IDP_CONFIG))
IDP = Server(config=conf)
# Parse incoming request
try:
req_info = IDP.parse_authn_request(request.session['SAMLRequest'],
BINDING_HTTP_POST)
except Exception as excp:
return HttpResponseBadRequest(excp)
# TODO this is taken from example, but no idea how this works or whats it does. Check SAML2 specification?
# Signed request for HTTP-REDIRECT
if "SigAlg" in request.session and "Signature" in request.session:
_certs = IDP.metadata.certs(req_info.message.issuer.text, "any",
"signing")
verified_ok = False
for cert in _certs:
# TODO implement
#if verify_redirect_signature(_info, IDP.sec.sec_backend, cert):
# verified_ok = True
# break
pass
if not verified_ok:
return HttpResponseBadRequest(
"Message signature verification failure")
binding_out, destination = IDP.pick_binding(
service="assertion_consumer_service",
entity_id=req_info.message.issuer.text)
# Gather response arguments
try:
resp_args = IDP.response_args(req_info.message)
except (UnknownPrincipal, UnsupportedBinding) as excp:
return HttpResponseServerError(excp)
try:
sp_config = settings.SAML_IDP_SPCONFIG[resp_args['sp_entity_id']]
except Exception:
raise ImproperlyConfigured(
"No config for SP %s defined in SAML_IDP_SPCONFIG" %
resp_args['sp_entity_id'])
# Create user-specified processor or fallback to all-access base processor
processor_string = sp_config.get('processor', None)
if processor_string is None:
processor = BaseProcessor
else:
processor_class = import_string(processor_string)
processor = processor_class()
# Check if user has access to the service of this SP
if not processor.has_access(request.user):
raise PermissionDenied("You do not have access to this resource")
# Create Identity dict (SP-specific)
sp_mapping = sp_config.get('attribute_mapping', {'username': '******'})
identity = processor.create_identity(request.user, sp_mapping)
# TODO investigate how this works, because I don't get it. Specification?
req_authn_context = req_info.message.requested_authn_context or PASSWORD
AUTHN_BROKER = AuthnBroker()
AUTHN_BROKER.add(authn_context_class_ref(req_authn_context), "")
# Construct SamlResponse message
try:
authn_resp = IDP.create_authn_response(
identity=identity,
userid=request.user.username,
name_id=NameID(format=resp_args['name_id_policy'].format,
sp_name_qualifier=destination,
text=request.user.username),
authn=AUTHN_BROKER.get_authn_by_accr(req_authn_context),
sign_response=IDP.config.getattr("sign_response", "idp") or False,
sign_assertion=IDP.config.getattr("sign_assertion", "idp")
or False,
**resp_args)
except Exception as excp:
return HttpResponseServerError(excp)
# Return as html with self-submitting form.
http_args = IDP.apply_binding(binding=binding_out,
msg_str="%s" % authn_resp,
destination=destination,
relay_state=request.session['RelayState'],
response=True)
logger.debug('http args are: %s' % http_args)
if processor.enable_multifactor(request.user):
# Store http_args in session for after multi factor is complete
request.session['saml_data'] = http_args['data']
logger.debug("Redirecting to process_multi_factor")
return HttpResponseRedirect(reverse('saml_multi_factor'))
else:
logger.debug("Performing SAML redirect")
return HttpResponse(http_args['data'])
def get(self, request, *args, **kwargs): # pylint: disable=missing-function-docstring, too-many-locals, unused-argument
passed_data = request.POST if request.method == 'POST' else request.GET
# get sp information from the parameters
try:
sp_entity_id = passed_data['sp']
except KeyError as excp:
return self.handle_error(request, exception=excp, status=400)
try:
# sp_config = SAML_IDP_SPCONFIG[sp_entity_id]
sp_config = {
'processor': 'djangosaml2idp.processors.BaseProcessor',
'attribute_mapping': {
# DJANGO: SAML
'username': '******',
'email': 'email',
'name': 'first_name',
'is_boss': 'is_admin',
'token': 'token',
}
}
except Exception: # pylint: disable=broad-except
return self.handle_error(
request,
exception=ImproperlyConfigured(
"No config for SP %s defined in SAML_IDP_SPCONFIG" %
sp_entity_id),
status=400)
binding_out, destination = self.IDP.pick_binding(
service="assertion_consumer_service", entity_id=sp_entity_id)
processor = self.get_processor(sp_entity_id, sp_config)
# Check if user has access to the service of this SP
if not processor.has_access(request):
return self.handle_error(
request,
exception=PermissionDenied(
"You do not have access to this resource"),
status=403)
identity = self.get_identity(processor, request.user, sp_config)
req_authn_context = PASSWORD
AUTHN_BROKER = AuthnBroker() # pylint: disable=invalid-name
AUTHN_BROKER.add(authn_context_class_ref(req_authn_context), "")
user_id = processor.get_user_id(request.user)
# Construct SamlResponse messages
try:
name_id_formats = self.IDP.config.getattr(
"name_id_format", "idp") or [NAMEID_FORMAT_UNSPECIFIED]
name_id = NameID(format=name_id_formats[0], text=user_id)
authn = AUTHN_BROKER.get_authn_by_accr(req_authn_context)
sign_response = self.IDP.config.getattr("sign_response",
"idp") or False
sign_assertion = self.IDP.config.getattr("sign_assertion",
"idp") or False
authn_resp = self.IDP.create_authn_response(
identity=identity,
in_response_to=None,
destination=destination,
sp_entity_id=sp_entity_id,
userid=user_id,
name_id=name_id,
authn=authn,
sign_response=sign_response,
sign_assertion=sign_assertion,
**passed_data)
except Exception as excp: # pylint: disable=broad-except
return self.handle_error(request, exception=excp, status=500)
# Return as html with self-submitting form.
http_args = self.IDP.apply_binding(
binding=binding_out,
msg_str="%s" % authn_resp,
destination=destination,
relay_state=passed_data['RelayState'],
response=True)
return HttpResponse(http_args['data'])
def get(self, request, *args, **kwargs): # pylint: disable=missing-function-docstring, unused-argument, too-many-locals
binding = request.session.get('Binding', BINDING_HTTP_POST)
# Parse incoming request
try:
req_info = self.IDP.parse_authn_request(
request.session['SAMLRequest'], binding)
except Exception as excp: # pylint: disable=broad-except
return self.handle_error(request, exception=excp)
# Signed request for HTTP-REDIRECT
if "SigAlg" in request.session and "Signature" in request.session:
_certs = self.IDP.metadata.certs(req_info.message.issuer.text,
"any", "signing")
verified_ok = False
for cert in _certs: # pylint: disable=unused-variable
# TODO implement
# if verify_redirect_signature(_info, self.IDP.sec.sec_backend, cert):
# verified_ok = True
# break
pass
if not verified_ok:
return self.handle_error(
request,
extra_message="Message signature verification failure",
status=400)
# Gather response arguments
try:
resp_args = self.IDP.response_args(req_info.message)
except (UnknownPrincipal, UnsupportedBinding) as excp:
return self.handle_error(request, exception=excp, status=400)
try:
# sp_config = SAML_IDP_SPCONFIG[resp_args['sp_entity_id']]
sp_config = {
'processor': 'djangosaml2idp.processors.BaseProcessor',
'attribute_mapping': {
# DJANGO: SAML
'email': 'email',
'private_email': 'private_email',
'username': '******',
'is_staff': 'is_staff',
'is_superuser': '******',
'token': 'token',
},
}
except Exception: # pylint: disable=broad-except
return self.handle_error(
request,
exception=ImproperlyConfigured(
"No config for SP %s defined in SAML_IDP_SPCONFIG" %
resp_args['sp_entity_id']),
status=400)
processor = self.get_processor(resp_args['sp_entity_id'], sp_config)
# Check if user has access to the service of this SP
if not processor.has_access(request):
return self.handle_error(
request,
exception=PermissionDenied(
"You do not have access to this resource"),
status=403)
cookie_user = self.cookie_user(request)
identity = self.get_identity(processor, cookie_user, sp_config)
req_authn_context = req_info.message.requested_authn_context or PASSWORD
AUTHN_BROKER = AuthnBroker() # pylint: disable=invalid-name
AUTHN_BROKER.add(authn_context_class_ref(req_authn_context), "")
user_id = processor.get_user_id(cookie_user)
# Construct SamlResponse message
try:
authn_resp = self.IDP.create_authn_response(
identity=identity,
userid=user_id,
name_id=NameID(format=resp_args['name_id_policy'].format,
sp_name_qualifier=resp_args['sp_entity_id'],
text=user_id),
authn=AUTHN_BROKER.get_authn_by_accr(req_authn_context),
sign_response=self.IDP.config.getattr("sign_response", "idp")
or False,
sign_assertion=self.IDP.config.getattr("sign_assertion", "idp")
or False,
**resp_args)
except Exception as excp: # pylint: disable=broad-except
return self.handle_error(request, exception=excp, status=500)
http_args = self.IDP.apply_binding(
binding=resp_args['binding'],
msg_str="%s" % authn_resp,
destination=resp_args['destination'],
relay_state=request.session['RelayState'],
response=True)
logger.debug('http args are: %s' % http_args) # pylint: disable=logging-not-lazy
return self.render_response(request, processor, http_args)
def get(self, request, *args, **kwargs): # pylint: disable=missing-function-docstring, unused-argument, too-many-locals
resp_args = {
'in_response_to': self.IN_RESPONSE_TO,
'sp_entity_id': self.SP_ENTITY_ID,
'name_id_policy': saml.NAMEID_FORMAT_PERSISTENT,
'binding': BINDING_HTTP_POST,
'destination': self.DESTINATION,
}
sp_config = {
'processor': 'djangosaml2idp.processors.BaseProcessor',
'attribute_mapping': {
'username':
'******',
'token':
'token',
'aliyun_sso_roles':
self.CUSTOM_CONFIG['role'],
'uid':
self.CUSTOM_CONFIG['role_session_name'],
'aliyun_sso_session_duration':
self.CUSTOM_CONFIG['session_duration'],
},
}
processor = self.get_processor(resp_args['sp_entity_id'], sp_config)
# Check if user has access to the service of this SP
if not processor.has_access(request):
return self.handle_error(
request,
exception=PermissionDenied(
"You do not have access to this resource"),
status=403)
cookie_user = self.cookie_user(request)
if not cookie_user.aliyun_sso_role.is_active:
# 用户的角色SSO被禁用
return self.handle_error(
request,
exception=PermissionDenied("Your role SSO has been disabled"),
status=403)
identity = self.get_identity(processor, cookie_user, sp_config)
# print('identity is', identity)
AUTHN_BROKER = AuthnBroker() # pylint: disable=invalid-name
AUTHN_BROKER.add(authn_context_class_ref(PASSWORD), "")
user_id = processor.get_user_id(cookie_user)
# Construct SamlResponse message
try:
app = SAMLAPP.valid_objects.get(
entity_id=resp_args['sp_entity_id'])
_spsso_descriptor = entity_descriptor_from_string(
app.xmldata).spsso_descriptor.pop() # pylint: disable=no-member
authn_resp = self.IDP.create_authn_response(
identity=identity,
userid=user_id,
name_id=NameID(format=resp_args['name_id_policy'],
sp_name_qualifier=resp_args['sp_entity_id'],
text=user_id),
authn=AUTHN_BROKER.get_authn_by_accr(PASSWORD),
sign_response=getattr(_spsso_descriptor,
'want_response_signed', '') == 'true',
sign_assertion=getattr(_spsso_descriptor,
'want_assertions_signed', '') == 'true',
**resp_args)
except Exception as excp: # pylint: disable=broad-except
return self.handle_error(request, exception=excp, status=500)
# print('authn_resp is', authn_resp)
http_args = self.IDP.apply_binding(
binding=resp_args['binding'],
msg_str="%s" % authn_resp,
destination=resp_args['destination'],
response=True)
return HttpResponse(http_args['data'])
def get(self, request, *args, **kwargs):
# Parse incoming request
try:
req_info = self.IDP.parse_authn_request(request.session['SAMLRequest'], BINDING_HTTP_POST)
except Exception as excp:
return HttpResponseBadRequest(excp)
# TODO this is taken from example, but no idea how this works or whats it does. Check SAML2 specification?
# Signed request for HTTP-REDIRECT
if "SigAlg" in request.session and "Signature" in request.session:
_certs = self.IDP.metadata.certs(req_info.message.issuer.text, "any", "signing")
verified_ok = False
for cert in _certs:
# TODO implement
#if verify_redirect_signature(_info, self.IDP.sec.sec_backend, cert):
# verified_ok = True
# break
pass
if not verified_ok:
return HttpResponseBadRequest("Message signature verification failure")
binding_out, destination = self.IDP.pick_binding(service="assertion_consumer_service", entity_id=req_info.message.issuer.text)
# Gather response arguments
try:
resp_args = self.IDP.response_args(req_info.message)
except (UnknownPrincipal, UnsupportedBinding) as excp:
return HttpResponseServerError(excp)
try:
sp_config = settings.SAML_IDP_SPCONFIG[resp_args['sp_entity_id']]
except Exception:
raise ImproperlyConfigured("No config for SP %s defined in SAML_IDP_SPCONFIG" % resp_args['sp_entity_id'])
processor = self.get_processor(sp_config)
# Check if user has access to the service of this SP
if not processor.has_access(request.user):
raise PermissionDenied("You do not have access to this resource")
identity = self.get_identity(processor, request.user, sp_config)
# TODO investigate how this works, because I don't get it. Specification?
req_authn_context = req_info.message.requested_authn_context or PASSWORD
AUTHN_BROKER = AuthnBroker()
AUTHN_BROKER.add(authn_context_class_ref(req_authn_context), "")
# Construct SamlResponse message
try:
authn_resp = self.IDP.create_authn_response(
identity=identity, userid=request.user.username,
name_id=NameID(format=resp_args['name_id_policy'].format, sp_name_qualifier=destination, text=request.user.username),
authn=AUTHN_BROKER.get_authn_by_accr(req_authn_context),
sign_response=self.IDP.config.getattr("sign_response", "idp") or False,
sign_assertion=self.IDP.config.getattr("sign_assertion", "idp") or False,
**resp_args)
except Exception as excp:
return HttpResponseServerError(excp)
http_args = self.IDP.apply_binding(
binding=binding_out,
msg_str="%s" % authn_resp,
destination=destination,
relay_state=request.session['RelayState'],
response=True)
logger.debug('http args are: %s' % http_args)
return self.render_response(request, processor, http_args)
