Support metadata reload (plus minor fixes)

src/saml2/assertion.py

@@ -35,6 +35,9 @@ def _filter_values(vals, vlist=None, must=False):
     if not vlist:  # No value specified equals any value
         return vals
 
+    if vals is None: # cannot iterate over None, return early
+        return vals
+
     if isinstance(vlist, six.string_types):
         vlist = [vlist]
 

src/saml2/entity.py

@@ -203,6 +203,39 @@ def __init__(self, entity_type, config=None, config_file="",
 
         self.msg_cb = msg_cb
 
+    def reload_metadata(self, metadata_conf):
+        """
+        Reload metadata configuration.
+
+        Load a new metadata configuration as defined by metadata_conf (by
+        passing this to Config.load_metadata) and make this entity (as well as
+        subordinate objects with own metadata reference) use the new metadata.
+
+        The structure of metadata_conf is the same as the 'metadata' entry in
+        the configuration passed to saml2.Config.
+
+        param metadata_conf: Metadata configuration as passed to Config.load_metadata
+        return: True if successfully reloaded
+        """
+        logger.debug("Loading new metadata")
+        try:
+            new_metadata = self.config.load_metadata(metadata_conf)
+        except Exception as ex:
+            logger.error("Loading metadata failed", exc_info=ex)
+            return False
+
+        logger.debug("Applying new metadata to main config")
+        ( self.metadata, self.sec.metadata, self.config.metadata ) = [new_metadata]*3
+        policy = getattr(self.config, "_%s_policy" % self.entity_type, None)
+        if policy and policy.metadata_store:
+            logger.debug("Applying new metadata to %s policy", self.entity_type)
+            policy.metadata_store = self.metadata
+
+        logger.debug("Applying new metadata source_id")
+        self.sourceid = self.metadata.construct_source_id()
+
+        return True
+
     def _issuer(self, entityid=None):
         """ Return an Issuer instance """
         if entityid:

src/saml2/mdstore.py

@@ -618,7 +618,14 @@ def parse(self, xmlstr):
         try:
             self.entities_descr = md.entities_descriptor_from_string(xmlstr)
         except Exception as e:
-            raise SAMLError(f'Failed to parse metadata file: {self.filename}') from e
+            _md_desc = (
+                f'metadata file: {self.filename}'
+                if isinstance(self,MetaDataFile)
+                else f'remote metadata: {self.url}'
+                if isinstance(self, MetaDataExtern)
+                else 'metadata'
+            )
+            raise SAMLError(f'Failed to parse {_md_desc}') from e
 
         if not self.entities_descr:
             self.entity_descr = md.entity_descriptor_from_string(xmlstr)
@@ -1693,4 +1700,5 @@ def dumps(self, format="local"):
 
             return "%s" % res
         elif format == "md":
-            return json.dumps(self.items(), indent=2)
+            # self.items() returns dictitems(), convert that back into a dict
+            return json.dumps(dict(self.items()), indent=2)

src/saml2/time_util.py

@@ -269,7 +269,7 @@ def utc_now():
 
 
 def before(point):
-    """ True if point datetime specification is before now.
+    """ True if current time is before point datetime specification.
 
     NOTE: If point is specified it is supposed to be in local time.
     Not UTC/GMT !! This is because that is what gmtime() expects.
@@ -286,7 +286,7 @@ def before(point):
 
 
 def after(point):
-    """ True if point datetime specification is equal or after now """
+    """ True if current time is after or equal to point datetime specification."""
     if not point:
         return True
     else: