Merge pull request #246 from maykinmedia/set-acs-binding

Add the ability to change the ProtocolBinding in the authn request.

Author: pitbulk

src/onelogin/saml2/authn_request.py

@@ -124,6 +124,7 @@ def __init__(self, settings, force_authn=False, is_passive=False, set_nameid_pol
                 'nameid_policy_str': nameid_policy_str,
                 'requested_authn_context_str': requested_authn_context_str,
                 'attr_consuming_service_str': attr_consuming_service_str,
+                'acs_binding': sp_data['assertionConsumerService'].get('binding', 'urn:oasis:names:tc:SAML:2.0:bindings:HTTP-POST')
             }
 
         self.__authn_request = request

src/onelogin/saml2/xml_templates.py

@@ -27,7 +27,7 @@ class OneLogin_Saml2_Templates(object):
   Version="2.0"%(provider_name)s%(force_authn_str)s%(is_passive_str)s
   IssueInstant="%(issue_instant)s"
   Destination="%(destination)s"
-  ProtocolBinding="urn:oasis:names:tc:SAML:2.0:bindings:HTTP-POST"
+  ProtocolBinding="%(acs_binding)s"
   AssertionConsumerServiceURL="%(assertion_url)s"%(attr_consuming_service_str)s>
     <saml:Issuer>%(entity_id)s</saml:Issuer>%(subject_str)s%(nameid_policy_str)s
 %(requested_authn_context_str)s