Don't look for an TLS private key if we have set --no-tls

synapse/config/server.py

@@ -30,7 +30,6 @@ class ServerConfig(Config):
         self.pid_file = self.abspath(args.pid_file)
         self.webclient = True
         self.manhole = args.manhole
-        self.no_tls = args.no_tls
         self.soft_file_limit = args.soft_file_limit
 
         if not args.content_addr:
@@ -76,8 +75,6 @@ class ServerConfig(Config):
         server_group.add_argument("--content-addr", default=None,
                                   help="The host and scheme to use for the "
                                   "content repository")
-        server_group.add_argument("--no-tls", action='store_true',
-                                  help="Don't bind to the https port.")
         server_group.add_argument("--soft-file-limit", type=int, default=0,
                                   help="Set the soft limit on the number of "
                                        "file descriptors synapse can use. "

synapse/config/tls.py

@@ -13,7 +13,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from ._base import Config
+from ._base import Config, ConfigError
 
 from OpenSSL import crypto
 import subprocess
@@ -28,9 +28,16 @@ class TlsConfig(Config):
         self.tls_certificate = self.read_tls_certificate(
             args.tls_certificate_path
         )
+
+        self.no_tls = args.no_tls
+
+        if self.no_tls:
+            self.tls_private_key = None
+        else:
             self.tls_private_key = self.read_tls_private_key(
                 args.tls_private_key_path
             )
+
         self.tls_dh_params_path = self.check_file(
             args.tls_dh_params_path, "tls_dh_params"
         )
@@ -45,6 +52,8 @@ class TlsConfig(Config):
                                help="PEM encoded private key for TLS")
         tls_group.add_argument("--tls-dh-params-path",
                                help="PEM dh parameters for ephemeral keys")
+        tls_group.add_argument("--no-tls", action='store_true',
+                               help="Don't bind to the https port.")
 
     def read_tls_certificate(self, cert_path):
         cert_pem = self.read_file(cert_path, "tls_certificate")

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)
+
+        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")