You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
87 lines
3.0 KiB
Python
87 lines
3.0 KiB
Python
# -*- coding: utf-8 -*-
|
|
# Copyright 2019 The Matrix.org Foundation C.I.C.
|
|
#
|
|
# Licensed under the Apache License, Version 2.0 (the "License");
|
|
# you may not use this file except in compliance with the License.
|
|
# You may obtain a copy of the License at
|
|
#
|
|
# http://www.apache.org/licenses/LICENSE-2.0
|
|
#
|
|
# Unless required by applicable law or agreed to in writing, software
|
|
# distributed under the License is distributed on an "AS IS" BASIS,
|
|
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
# See the License for the specific language governing permissions and
|
|
# limitations under the License.
|
|
|
|
import re
|
|
import string
|
|
|
|
__version__ = "0.0.1"
|
|
|
|
|
|
class SamlMappingProvider(object):
|
|
def __init__(self):
|
|
mxid_localpart_allowed_characters = set(
|
|
"_-./=" + string.ascii_lowercase + string.digits
|
|
)
|
|
self._dot_replace_pattern = re.compile(
|
|
("[^%s]" % (re.escape("".join(mxid_localpart_allowed_characters)),))
|
|
)
|
|
self._multiple_to_single_dot_pattern = re.compile(r"\.{2,}")
|
|
|
|
self._string_end_dot_pattern = re.compile(r"\.$")
|
|
|
|
def mxid_source_to_mxid_localpart(self, mxid_source: str, failures: int = 0) -> str:
|
|
"""Maps some text from a SAML response to the localpart of a new mxid
|
|
|
|
Args:
|
|
mxid_source (str): The input text from a SAML auth response
|
|
|
|
failures (int): How many times a call to this function with this
|
|
mxid_source has resulted in a failure (possibly due to the localpart
|
|
already existing)
|
|
|
|
Returns:
|
|
str: The localpart of a new mxid
|
|
"""
|
|
# Truncate the username to the first found '@' character to prevent complete
|
|
# emails being leaked
|
|
pos = mxid_source.find("@")
|
|
if pos >= 0:
|
|
mxid_source = mxid_source[:pos]
|
|
mxid_localpart = self._dotreplace_for_mxid(mxid_source)
|
|
|
|
# Append suffix integer if last call to this function failed to produce
|
|
# a usable mxid
|
|
return mxid_localpart + (str(failures) if failures else "")
|
|
|
|
def _dotreplace_for_mxid(self, username: str) -> str:
|
|
"""Replace non-allowed mxid characters with a '.'
|
|
|
|
Args:
|
|
username (str): The username to process
|
|
|
|
Returns:
|
|
str: The processed username
|
|
"""
|
|
username = username.lower()
|
|
username = self._dot_replace_pattern.sub(".", username)
|
|
|
|
# regular mxids aren't allowed to start with an underscore either
|
|
username = re.sub("^_", "", username)
|
|
|
|
# Change all instances of multiple dots together into a single dot
|
|
username = self._multiple_to_single_dot_pattern.sub(".", username)
|
|
|
|
# Remove any trailing dots
|
|
username = self._string_end_dot_pattern.sub("", username)
|
|
return username
|
|
|
|
@staticmethod
|
|
def parse_config(config):
|
|
"""Parse the dict provided in the homeserver config.
|
|
|
|
We currently do not use any config vars
|
|
"""
|
|
pass
|