Preserve xmlns:xs namespace when signing and serializing responses #80
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Fix for: #76
This PR overrides the
OneLogin_Saml2_XML
static methodcleanup_namspaces
, which is directly invokingetree.cleanup_namespaces
. I added a whitelist of namespaces that should not be cleaned from an element before serialization into XML. This preserves thexmlns:xs
namespace that's specifically needed to validate the schema of a SAML Response's attributes.I also added some additional namespace prefix constants (now grouped with the other namespace constants) in
OneLogin_Saml2_Constants
.