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-rw-r--r--synapse/crypto/context_factory.py5
-rw-r--r--synapse/crypto/keyring.py13
2 files changed, 15 insertions, 3 deletions
diff --git a/synapse/crypto/context_factory.py b/synapse/crypto/context_factory.py
index 24d4abf3e9..2f8618a0df 100644
--- a/synapse/crypto/context_factory.py
+++ b/synapse/crypto/context_factory.py
@@ -38,7 +38,10 @@ class ServerContextFactory(ssl.ContextFactory):
             logger.exception("Failed to enable eliptic curve for TLS")
         context.set_options(SSL.OP_NO_SSLv2 | SSL.OP_NO_SSLv3)
         context.use_certificate(config.tls_certificate)
-        context.use_privatekey(config.tls_private_key)
+
+        if not config.no_tls:
+            context.use_privatekey(config.tls_private_key)
+
         context.load_tmp_dh(config.tls_dh_params_path)
         context.set_cipher_list("!ADH:HIGH+kEDH:!AECDH:HIGH+kEECDH")
 
diff --git a/synapse/crypto/keyring.py b/synapse/crypto/keyring.py
index 828aced44a..f4db7b8a05 100644
--- a/synapse/crypto/keyring.py
+++ b/synapse/crypto/keyring.py
@@ -50,18 +50,27 @@ class Keyring(object):
             )
         try:
             verify_key = yield self.get_server_verify_key(server_name, key_ids)
-        except IOError:
+        except IOError as e:
+            logger.warn(
+                "Got IOError when downloading keys for %s: %s %s",
+                server_name, type(e).__name__, str(e.message),
+            )
             raise SynapseError(
                 502,
                 "Error downloading keys for %s" % (server_name,),
                 Codes.UNAUTHORIZED,
             )
-        except:
+        except Exception as e:
+            logger.warn(
+                "Got Exception when downloading keys for %s: %s %s",
+                server_name, type(e).__name__, str(e.message),
+            )
             raise SynapseError(
                 401,
                 "No key for %s with id %s" % (server_name, key_ids),
                 Codes.UNAUTHORIZED,
             )
+
         try:
             verify_signed_json(json_object, server_name, verify_key)
         except: