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-rw-r--r--synapse/config/registration.py20
1 files changed, 17 insertions, 3 deletions
diff --git a/synapse/config/registration.py b/synapse/config/registration.py
index e603575da3..6a0aaea92c 100644
--- a/synapse/config/registration.py
+++ b/synapse/config/registration.py
@@ -15,23 +15,37 @@
 
 from ._base import Config
 
+from synapse.util.stringutils import random_string_with_symbols
+
 
 class RegistrationConfig(Config):
 
     def __init__(self, args):
         super(RegistrationConfig, self).__init__(args)
         self.disable_registration = args.disable_registration
+        self.registration_shared_secret = args.registration_shared_secret
 
     @classmethod
     def add_arguments(cls, parser):
         super(RegistrationConfig, cls).add_arguments(parser)
         reg_group = parser.add_argument_group("registration")
+
         reg_group.add_argument(
             "--disable-registration",
-            action='store_true',
-            help="Disable registration of new users."
+            action='store_const',
+            const=True,
+            help="Disable registration of new users.",
+        )
+        reg_group.add_argument(
+            "--registration-shared-secret", type=str,
+            help="If set, allows registration by anyone who also has the shared"
+                 " secret, even if registration is otherwise disabled.",
         )
 
     @classmethod
     def generate_config(cls, args, config_dir_path):
-        args.disable_registration = True
+        if args.disable_registration is None:
+            args.disable_registration = True
+
+        if args.registration_shared_secret is None:
+            args.registration_shared_secret= random_string_with_symbols(50)