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102 lines
3.0 KiB
Python
102 lines
3.0 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 2018 New Vector Ltd
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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from synapse.util import glob_to_regex
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from ._base import Config, ConfigError
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class RoomDirectoryConfig(Config):
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def read_config(self, config):
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alias_creation_rules = config["alias_creation_rules"]
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self._alias_creation_rules = [
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_AliasRule(rule)
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for rule in alias_creation_rules
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]
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def default_config(self, config_dir_path, server_name, **kwargs):
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return """
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# The `alias_creation` option controls who's allowed to create aliases
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# on this server.
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#
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# The format of this option is a list of rules that contain globs that
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# match against user_id and the new alias (fully qualified with server
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# name). The action in the first rule that matches is taken, which can
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# currently either be "allowed" or "denied".
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#
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# If no rules match the request is denied.
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alias_creation_rules:
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- user_id: "*"
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alias: "*"
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action: allowed
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"""
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def is_alias_creation_allowed(self, user_id, alias):
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"""Checks if the given user is allowed to create the given alias
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Args:
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user_id (str)
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alias (str)
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Returns:
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boolean: True if user is allowed to crate the alias
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"""
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for rule in self._alias_creation_rules:
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if rule.matches(user_id, alias):
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return rule.action == "allowed"
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return False
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class _AliasRule(object):
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def __init__(self, rule):
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action = rule["action"]
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user_id = rule["user_id"]
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alias = rule["alias"]
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if action in ("allowed", "denied"):
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self.action = action
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else:
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raise ConfigError(
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"alias_creation_rules rules can only have action of 'allowed'"
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" or 'denied'"
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)
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try:
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self._user_id_regex = glob_to_regex(user_id)
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self._alias_regex = glob_to_regex(alias)
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except Exception as e:
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raise ConfigError("Failed to parse glob into regex: %s", e)
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def matches(self, user_id, alias):
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"""Tests if this rule matches the given user_id and alias.
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Args:
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user_id (str)
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alias (str)
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Returns:
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boolean
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"""
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if not self._user_id_regex.search(user_id):
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return False
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if not self._alias_regex.search(alias):
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return False
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return True
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