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-rw-r--r--synapse/rest/client/v1/register.py40
-rw-r--r--synapse/rest/client/v2_alpha/account.py16
-rw-r--r--synapse/rest/client/v2_alpha/register.py16
3 files changed, 53 insertions, 19 deletions
diff --git a/synapse/rest/client/v1/register.py b/synapse/rest/client/v1/register.py
index 32ed1d3ab2..f793542ad6 100644
--- a/synapse/rest/client/v1/register.py
+++ b/synapse/rest/client/v1/register.py
@@ -70,10 +70,24 @@ class RegisterRestServlet(ClientV1RestServlet):
         self.handlers = hs.get_handlers()
 
     def on_GET(self, request):
+
+        require_email = False
+        require_msisdn = False
+        for constraint in self.hs.config.registrations_require_3pid:
+            if constraint['medium'] == 'email':
+                require_email = True
+            elif constraint['medium'] == 'msisdn':
+                require_msisdn = True
+            else:
+                logger.warn(
+                    "Unrecognised 3PID medium %s in registrations_require_3pid" %
+                    constraint['medium']
+                )
+
+        flows = []
         if self.hs.config.enable_registration_captcha:
-            return (
-                200,
-                {"flows": [
+            if require_email or not require_msisdn:
+                flows.extend([
                     {
                         "type": LoginType.RECAPTCHA,
                         "stages": [
@@ -82,27 +96,31 @@ class RegisterRestServlet(ClientV1RestServlet):
                             LoginType.PASSWORD
                         ]
                     },
+                ])
+            if not require_email and not require_msisdn:
+                flows.extend([
                     {
                         "type": LoginType.RECAPTCHA,
                         "stages": [LoginType.RECAPTCHA, LoginType.PASSWORD]
                     }
-                ]}
-            )
+                ])
         else:
-            return (
-                200,
-                {"flows": [
+            if require_email or not require_msisdn:
+                flows.extend([
                     {
                         "type": LoginType.EMAIL_IDENTITY,
                         "stages": [
                             LoginType.EMAIL_IDENTITY, LoginType.PASSWORD
                         ]
-                    },
+                    }
+                ])
+            if not require_email and not require_msisdn:
+                flows.extend([
                     {
                         "type": LoginType.PASSWORD
                     }
-                ]}
-            )
+                ])
+        return (200, {"flows": flows})
 
     @defer.inlineCallbacks
     def on_POST(self, request):
diff --git a/synapse/rest/client/v2_alpha/account.py b/synapse/rest/client/v2_alpha/account.py
index 66221e8f00..2977ad439f 100644
--- a/synapse/rest/client/v2_alpha/account.py
+++ b/synapse/rest/client/v2_alpha/account.py
@@ -48,7 +48,9 @@ class EmailPasswordRequestTokenRestServlet(RestServlet):
         ])
 
         if not check_3pid_allowed(self.hs, "email", body['email']):
-            raise SynapseError(403, "3PID denied", Codes.THREEPID_DENIED)
+            raise SynapseError(
+                403, "Third party identifier is not allowed", Codes.THREEPID_DENIED
+            )
 
         existingUid = yield self.hs.get_datastore().get_user_id_by_threepid(
             'email', body['email']
@@ -82,7 +84,9 @@ class MsisdnPasswordRequestTokenRestServlet(RestServlet):
         msisdn = phone_number_to_msisdn(body['country'], body['phone_number'])
 
         if not check_3pid_allowed(self.hs, "msisdn", msisdn):
-            raise SynapseError(403, "3PID denied", Codes.THREEPID_DENIED)
+            raise SynapseError(
+                403, "Third party identifier is not allowed", Codes.THREEPID_DENIED
+            )
 
         existingUid = yield self.datastore.get_user_id_by_threepid(
             'msisdn', msisdn
@@ -224,7 +228,9 @@ class EmailThreepidRequestTokenRestServlet(RestServlet):
             raise SynapseError(400, "Missing params: %r" % absent, Codes.MISSING_PARAM)
 
         if not check_3pid_allowed(self.hs, "email", body['email']):
-            raise SynapseError(403, "3PID denied", Codes.THREEPID_DENIED)
+            raise SynapseError(
+                403, "Third party identifier is not allowed", Codes.THREEPID_DENIED
+            )
 
         existingUid = yield self.datastore.get_user_id_by_threepid(
             'email', body['email']
@@ -265,7 +271,9 @@ class MsisdnThreepidRequestTokenRestServlet(RestServlet):
         msisdn = phone_number_to_msisdn(body['country'], body['phone_number'])
 
         if not check_3pid_allowed(self.hs, "msisdn", msisdn):
-            raise SynapseError(403, "3PID denied", Codes.THREEPID_DENIED)
+            raise SynapseError(
+                403, "Third party identifier is not allowed", Codes.THREEPID_DENIED
+            )
 
         existingUid = yield self.datastore.get_user_id_by_threepid(
             'msisdn', msisdn
diff --git a/synapse/rest/client/v2_alpha/register.py b/synapse/rest/client/v2_alpha/register.py
index 762782c1f0..898d8b133a 100644
--- a/synapse/rest/client/v2_alpha/register.py
+++ b/synapse/rest/client/v2_alpha/register.py
@@ -72,7 +72,9 @@ class EmailRegisterRequestTokenRestServlet(RestServlet):
         ])
 
         if not check_3pid_allowed(self.hs, "email", body['email']):
-            raise SynapseError(403, "3PID denied", Codes.THREEPID_DENIED)
+            raise SynapseError(
+                403, "Third party identifier is not allowed", Codes.THREEPID_DENIED
+            )
 
         existingUid = yield self.hs.get_datastore().get_user_id_by_threepid(
             'email', body['email']
@@ -110,7 +112,9 @@ class MsisdnRegisterRequestTokenRestServlet(RestServlet):
         msisdn = phone_number_to_msisdn(body['country'], body['phone_number'])
 
         if not check_3pid_allowed(self.hs, "msisdn", msisdn):
-            raise SynapseError(403, "3PID denied", Codes.THREEPID_DENIED)
+            raise SynapseError(
+                403, "Third party identifier is not allowed", Codes.THREEPID_DENIED
+            )
 
         existingUid = yield self.hs.get_datastore().get_user_id_by_threepid(
             'msisdn', msisdn
@@ -368,7 +372,9 @@ class RegisterRestServlet(RestServlet):
                     auth_result[LoginType.EMAIL_IDENTITY].threepid.address
                 )
             ):
-                raise SynapseError(403, "3PID denied", Codes.THREEPID_DENIED)
+                raise SynapseError(
+                    403, "Third party identifier is not allowed", Codes.THREEPID_DENIED
+                )
             elif (
                 constraint['medium'] == 'msisdn' and
                 auth_result and LoginType.MSISDN in auth_result and
@@ -377,7 +383,9 @@ class RegisterRestServlet(RestServlet):
                     auth_result[LoginType.MSISDN].threepid.address
                 )
             ):
-                raise SynapseError(403, "3PID denied", Codes.THREEPID_DENIED)
+                raise SynapseError(
+                    403, "Third party identifier is not allowed", Codes.THREEPID_DENIED
+                )
 
         if registered_user_id is not None:
             logger.info(