diff --git a/synapse/config/registration.py b/synapse/config/registration.py
index 9bb3beedbc..f255b58c8a 100644
--- a/synapse/config/registration.py
+++ b/synapse/config/registration.py
@@ -99,6 +99,9 @@ class RegistrationConfig(Config):
self.registrations_require_3pid = config.get("registrations_require_3pid", [])
self.allowed_local_3pids = config.get("allowed_local_3pids", [])
+ self.check_is_for_allowed_local_3pids = config.get(
+ "check_is_for_allowed_local_3pids", None
+ )
self.enable_3pid_lookup = config.get("enable_3pid_lookup", True)
self.registration_shared_secret = config.get("registration_shared_secret")
@@ -247,6 +250,11 @@ class RegistrationConfig(Config):
# Mandate that users are only allowed to associate certain formats of
# 3PIDs with accounts on this server.
#
+ # Use an Identity Server to establish which 3PIDs are allowed to register?
+ # Overrides allowed_local_3pids below.
+ #
+ #check_is_for_allowed_local_3pids: matrix.org
+ #
#allowed_local_3pids:
# - medium: email
# pattern: '.*@matrix\\.org'
diff --git a/synapse/rest/client/v2_alpha/account.py b/synapse/rest/client/v2_alpha/account.py
index 631cc74cb4..3b99fbf6c2 100644
--- a/synapse/rest/client/v2_alpha/account.py
+++ b/synapse/rest/client/v2_alpha/account.py
@@ -88,7 +88,7 @@ class EmailPasswordRequestTokenRestServlet(RestServlet):
send_attempt = body["send_attempt"]
next_link = body.get("next_link") # Optional param
- if not check_3pid_allowed(self.hs, "email", email):
+ if not await check_3pid_allowed(self.hs, "email", email):
raise SynapseError(
403,
"Your email domain is not authorized on this server",
@@ -366,7 +366,7 @@ class EmailThreepidRequestTokenRestServlet(RestServlet):
send_attempt = body["send_attempt"]
next_link = body.get("next_link") # Optional param
- if not check_3pid_allowed(self.hs, "email", email):
+ if not await check_3pid_allowed(self.hs, "email", email):
raise SynapseError(
403,
"Your email domain is not authorized on this server",
@@ -431,7 +431,7 @@ class MsisdnThreepidRequestTokenRestServlet(RestServlet):
msisdn = phone_number_to_msisdn(country, phone_number)
- if not check_3pid_allowed(self.hs, "msisdn", msisdn):
+ if not await check_3pid_allowed(self.hs, "msisdn", msisdn):
raise SynapseError(
403,
"Account phone numbers are not authorized on this server",
diff --git a/synapse/rest/client/v2_alpha/register.py b/synapse/rest/client/v2_alpha/register.py
index a09189b1b4..0c50988899 100644
--- a/synapse/rest/client/v2_alpha/register.py
+++ b/synapse/rest/client/v2_alpha/register.py
@@ -123,7 +123,7 @@ class EmailRegisterRequestTokenRestServlet(RestServlet):
send_attempt = body["send_attempt"]
next_link = body.get("next_link") # Optional param
- if not check_3pid_allowed(self.hs, "email", email):
+ if not await check_3pid_allowed(self.hs, "email", email):
raise SynapseError(
403,
"Your email domain is not authorized to register on this server",
@@ -190,7 +190,7 @@ class MsisdnRegisterRequestTokenRestServlet(RestServlet):
msisdn = phone_number_to_msisdn(country, phone_number)
- if not check_3pid_allowed(self.hs, "msisdn", msisdn):
+ if not await check_3pid_allowed(self.hs, "msisdn", msisdn):
raise SynapseError(
403,
"Phone numbers are not authorized to register on this server",
@@ -514,7 +514,7 @@ class RegisterRestServlet(RestServlet):
medium = auth_result[login_type]["medium"]
address = auth_result[login_type]["address"]
- if not check_3pid_allowed(self.hs, medium, address):
+ if not await check_3pid_allowed(self.hs, medium, address):
raise SynapseError(
403,
"Third party identifiers (email/phone numbers)"
diff --git a/synapse/util/threepids.py b/synapse/util/threepids.py
index 3ec1dfb0c2..20cf4c4a81 100644
--- a/synapse/util/threepids.py
+++ b/synapse/util/threepids.py
@@ -19,7 +19,7 @@ import re
logger = logging.getLogger(__name__)
-def check_3pid_allowed(hs, medium, address):
+async def check_3pid_allowed(hs, medium, address):
"""Checks whether a given format of 3PID is allowed to be used on this HS
Args:
@@ -31,6 +31,32 @@ def check_3pid_allowed(hs, medium, address):
bool: whether the 3PID medium/address is allowed to be added to this HS
"""
+ if hs.config.check_is_for_allowed_local_3pids:
+ data = await hs.get_simple_http_client().get_json(
+ "https://%s%s" % (
+ hs.config.check_is_for_allowed_local_3pids,
+ "/_matrix/identity/api/v1/internal-info"
+ ),
+ {'medium': medium, 'address': address}
+ )
+
+ # Check for invalid response
+ if 'hs' not in data and 'shadow_hs' not in data:
+ return False
+
+ # Check if this user is intended to register for this homeserver
+ if (
+ data.get('hs') != hs.config.server_name
+ and data.get('shadow_hs') != hs.config.server_name
+ ):
+ return False
+
+ if data.get('requires_invite', False) and not data.get('invited', False):
+ # Requires an invite but hasn't been invited
+ return False
+
+ return True
+
if hs.config.allowed_local_3pids:
for constraint in hs.config.allowed_local_3pids:
logger.debug(
|
