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Enforce sensible group IDs

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This commit is contained in:
Erik Johnston 2017-10-19 12:01:01 +01:00
parent 011d03a0f6
commit 513c23bfd9
1 changed files with 19 additions and 1 deletions
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20
synapse/groups/groups_server.py
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@ -16,10 +16,11 @@
from twisted.internet import defer
from synapse.api.errors import SynapseError
from synapse.types import UserID, get_domain_from_id, RoomID
from synapse.types import UserID, get_domain_from_id, RoomID, GroupID
import logging
import urllib
logger = logging.getLogger(__name__)
@ -697,6 +698,8 @@ class GroupsServerHandler(object):
def create_group(self, group_id, user_id, content):
group = yield self.check_group_is_ours(group_id)
_validate_group_id(group_id)
logger.info("Attempting to create group with ID: %r", group_id)
if group:
raise SynapseError(400, "Group already exists")
@ -773,3 +776,18 @@ def _parse_visibility_from_contents(content):
is_public = True
return is_public
def _validate_group_id(group_id):
"""Validates the group ID is valid for creation on this home server
"""
localpart = GroupID.from_string(group_id).localpart
if localpart.lower() != localpart:
raise SynapseError(400, "Group ID must be lower case")
if urllib.quote(localpart.encode('utf-8')) != localpart:
raise SynapseError(
400,
"Group ID can only contain characters a-z, 0-9, or '_-./'",
)