Merge pull request #560 from erakli/fix_verify_signature

Small fixes in SecurityContext.verify_signature

Author: c00kiemon5ter

src/saml2/sigver.py

@@ -1487,10 +1487,10 @@ def _check_signature(self, decoded_xml, item, node_name=NODE_NAME, origdoc=None,
                 for cert in cert_from_instance(item)
             ]
         else:
-            logger.debug('==== Certs from metadata ==== %s: %s ====', issuer, certs)
+            logger.debug('==== Certs from metadata ==== %s: %s ====', _issuer, certs)
 
         if not certs:
-            raise MissingKey(issuer)
+            raise MissingKey(_issuer)
 
         verified = False
         last_pem_file = None
@@ -1509,9 +1509,6 @@ def _check_signature(self, decoded_xml, item, node_name=NODE_NAME, origdoc=None,
             except XmlsecError as exc:
                 logger.error('check_sig: %s', exc)
                 pass
-            except SignatureError as exc:
-                logger.error('check_sig: %s', exc)
-                pass
             except Exception as exc:
                 logger.error('check_sig: %s', exc)
                 raise