diff options
Diffstat (limited to 'synapse/util/stringutils.py')
| -rw-r--r-- | synapse/util/stringutils.py | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/synapse/util/stringutils.py b/synapse/util/stringutils.py index 982c6d81ca..2c0dcb5208 100644 --- a/synapse/util/stringutils.py +++ b/synapse/util/stringutils.py @@ -1,5 +1,6 @@ # -*- 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. @@ -14,14 +15,22 @@ # limitations under the License. import random +import re import string import six from six import PY2, PY3 from six.moves import range +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. @@ -109,3 +118,11 @@ def exception_to_unicode(e): return msg.decode("utf-8", errors="replace") else: return msg + + +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 + ) |