anonymousland-synapse/synapse/handlers/password_policy.py
Patrick Cloke e584534403
Use direct references for some configuration variables (part 3) ()
This avoids the overhead of searching through the various
configuration classes by directly referencing the class that
the attributes are in.

It also improves type hints since mypy can now resolve the
types of the configuration variables.
2021-09-23 07:13:34 -04:00

97 lines
3.3 KiB
Python

# Copyright 2019 New Vector Ltd
# 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 logging
import re
from typing import TYPE_CHECKING
from synapse.api.errors import Codes, PasswordRefusedError
if TYPE_CHECKING:
from synapse.server import HomeServer
logger = logging.getLogger(__name__)
class PasswordPolicyHandler:
def __init__(self, hs: "HomeServer"):
self.policy = hs.config.auth.password_policy
self.enabled = hs.config.auth.password_policy_enabled
# Regexps for the spec'd policy parameters.
self.regexp_digit = re.compile("[0-9]")
self.regexp_symbol = re.compile("[^a-zA-Z0-9]")
self.regexp_uppercase = re.compile("[A-Z]")
self.regexp_lowercase = re.compile("[a-z]")
def validate_password(self, password: str) -> None:
"""Checks whether a given password complies with the server's policy.
Args:
password: The password to check against the server's policy.
Raises:
PasswordRefusedError: The password doesn't comply with the server's policy.
"""
if not self.enabled:
return
minimum_accepted_length = self.policy.get("minimum_length", 0)
if len(password) < minimum_accepted_length:
raise PasswordRefusedError(
msg=(
"The password must be at least %d characters long"
% minimum_accepted_length
),
errcode=Codes.PASSWORD_TOO_SHORT,
)
if (
self.policy.get("require_digit", False)
and self.regexp_digit.search(password) is None
):
raise PasswordRefusedError(
msg="The password must include at least one digit",
errcode=Codes.PASSWORD_NO_DIGIT,
)
if (
self.policy.get("require_symbol", False)
and self.regexp_symbol.search(password) is None
):
raise PasswordRefusedError(
msg="The password must include at least one symbol",
errcode=Codes.PASSWORD_NO_SYMBOL,
)
if (
self.policy.get("require_uppercase", False)
and self.regexp_uppercase.search(password) is None
):
raise PasswordRefusedError(
msg="The password must include at least one uppercase letter",
errcode=Codes.PASSWORD_NO_UPPERCASE,
)
if (
self.policy.get("require_lowercase", False)
and self.regexp_lowercase.search(password) is None
):
raise PasswordRefusedError(
msg="The password must include at least one lowercase letter",
errcode=Codes.PASSWORD_NO_LOWERCASE,
)