80 lines
2.7 KiB
Python
80 lines
2.7 KiB
Python
# -*- coding: utf-8 -*-
|
|
# Copyright 2014-2016 OpenMarket Ltd
|
|
# Copyright 2020 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 itertools
|
|
import random
|
|
import re
|
|
import string
|
|
from collections import Iterable
|
|
|
|
from synapse.api.errors import Codes, SynapseError
|
|
|
|
_string_with_symbols = string.digits + string.ascii_letters + ".,;:^&*-_+=#~@"
|
|
|
|
# https://matrix.org/docs/spec/client_server/r0.6.0#post-matrix-client-r0-register-email-requesttoken
|
|
# Note: The : character is allowed here for older clients, but will be removed in a
|
|
# future release. Context: https://github.com/matrix-org/synapse/issues/6766
|
|
client_secret_regex = re.compile(r"^[0-9a-zA-Z\.\=\_\-\:]+$")
|
|
|
|
# random_string and random_string_with_symbols are used for a range of things,
|
|
# some cryptographically important, some less so. We use SystemRandom to make sure
|
|
# we get cryptographically-secure randoms.
|
|
rand = random.SystemRandom()
|
|
|
|
|
|
def random_string(length):
|
|
return "".join(rand.choice(string.ascii_letters) for _ in range(length))
|
|
|
|
|
|
def random_string_with_symbols(length):
|
|
return "".join(rand.choice(_string_with_symbols) for _ in range(length))
|
|
|
|
|
|
def is_ascii(s):
|
|
if isinstance(s, bytes):
|
|
try:
|
|
s.decode("ascii").encode("ascii")
|
|
except UnicodeDecodeError:
|
|
return False
|
|
except UnicodeEncodeError:
|
|
return False
|
|
return True
|
|
|
|
|
|
def assert_valid_client_secret(client_secret):
|
|
"""Validate that a given string matches the client_secret regex defined by the spec"""
|
|
if client_secret_regex.match(client_secret) is None:
|
|
raise SynapseError(
|
|
400, "Invalid client_secret parameter", errcode=Codes.INVALID_PARAM
|
|
)
|
|
|
|
|
|
def shortstr(iterable: Iterable, maxitems: int = 5) -> str:
|
|
"""If iterable has maxitems or fewer, return the stringification of a list
|
|
containing those items.
|
|
|
|
Otherwise, return the stringification of a a list with the first maxitems items,
|
|
followed by "...".
|
|
|
|
Args:
|
|
iterable: iterable to truncate
|
|
maxitems: number of items to return before truncating
|
|
"""
|
|
|
|
items = list(itertools.islice(iterable, maxitems + 1))
|
|
if len(items) <= maxitems:
|
|
return str(items)
|
|
return "[" + ", ".join(repr(r) for r in items[:maxitems]) + ", ...]"
|