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Merge pull request #2558 from matrix-org/erikj/group_id_validation
Enforce sensible group IDs
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commit
287dd1ee2c
@ -16,10 +16,11 @@
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from twisted.internet import defer
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from synapse.api.errors import SynapseError
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from synapse.types import UserID, get_domain_from_id, RoomID
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from synapse.types import UserID, get_domain_from_id, RoomID, GroupID
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import logging
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import urllib
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logger = logging.getLogger(__name__)
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@ -697,6 +698,8 @@ class GroupsServerHandler(object):
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def create_group(self, group_id, user_id, content):
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group = yield self.check_group_is_ours(group_id)
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_validate_group_id(group_id)
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logger.info("Attempting to create group with ID: %r", group_id)
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if group:
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raise SynapseError(400, "Group already exists")
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@ -773,3 +776,18 @@ def _parse_visibility_from_contents(content):
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is_public = True
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return is_public
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def _validate_group_id(group_id):
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"""Validates the group ID is valid for creation on this home server
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"""
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localpart = GroupID.from_string(group_id).localpart
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if localpart.lower() != localpart:
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raise SynapseError(400, "Group ID must be lower case")
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if urllib.quote(localpart.encode('utf-8')) != localpart:
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raise SynapseError(
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400,
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"Group ID can only contain characters a-z, 0-9, or '_-./'",
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)
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