diff --git a/synapse/util/threepids.py b/synapse/util/threepids.py
index 3ec1dfb0c2..cfdaa1c5d9 100644
--- a/synapse/util/threepids.py
+++ b/synapse/util/threepids.py
@@ -16,11 +16,14 @@
import logging
import re
+from twisted.internet import defer
+
logger = logging.getLogger(__name__)
+@defer.inlineCallbacks
def check_3pid_allowed(hs, medium, address):
- """Checks whether a given format of 3PID is allowed to be used on this HS
+ """Checks whether a given 3PID is allowed to be used on this HS
Args:
hs (synapse.server.HomeServer): server
@@ -28,9 +31,36 @@ def check_3pid_allowed(hs, medium, address):
address (str): address within that medium (e.g. "wotan@matrix.org")
msisdns need to first have been canonicalised
Returns:
- bool: whether the 3PID medium/address is allowed to be added to this HS
+ defered bool: whether the 3PID medium/address is allowed to be added to this HS
"""
+ if hs.config.check_is_for_allowed_local_3pids:
+ data = yield 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:
+ defer.returnValue(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
+ ):
+ defer.returnValue(False)
+
+ if data.get("requires_invite", False) and not data.get("invited", False):
+ # Requires an invite but hasn't been invited
+ defer.returnValue(False)
+
+ defer.returnValue(True)
+
if hs.config.allowed_local_3pids:
for constraint in hs.config.allowed_local_3pids:
logger.debug(
@@ -43,8 +73,31 @@ def check_3pid_allowed(hs, medium, address):
if medium == constraint["medium"] and re.match(
constraint["pattern"], address
):
- return True
+ defer.returnValue(True)
else:
- return True
+ defer.returnValue(True)
+
+ defer.returnValue(False)
+
+
+def canonicalise_email(address: str) -> str:
+ """'Canonicalise' email address
+ Case folding of local part of email address and lowercase domain part
+ See MSC2265, https://github.com/matrix-org/matrix-doc/pull/2265
+
+ Args:
+ address: email address to be canonicalised
+ Returns:
+ The canonical form of the email address
+ Raises:
+ ValueError if the address could not be parsed.
+ """
+
+ address = address.strip()
+
+ parts = address.split("@")
+ if len(parts) != 2:
+ logger.debug("Couldn't parse email address %s", address)
+ raise ValueError("Unable to parse email address")
- return False
+ return parts[0].casefold() + "@" + parts[1].lower()
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