56 lines
2.0 KiB
Python
56 lines
2.0 KiB
Python
# SPDX-License-Identifier: MIT
|
|
#
|
|
# Copyright (c) 2017 PySSB contributors (see AUTHORS for more details)
|
|
#
|
|
# Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
# of this software and associated documentation files (the "Software"), to deal
|
|
# in the Software without restriction, including without limitation the rights
|
|
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
# copies of the Software, and to permit persons to whom the Software is
|
|
# furnished to do so, subject to the following conditions:
|
|
#
|
|
# The above copyright notice and this permission notice shall be included in all
|
|
# copies or substantial portions of the Software.
|
|
#
|
|
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
|
|
# SOFTWARE.
|
|
|
|
"""Utility functions"""
|
|
|
|
from base64 import b64decode, b64encode
|
|
import os
|
|
from typing import Optional
|
|
|
|
from nacl.signing import SigningKey
|
|
import yaml
|
|
|
|
|
|
class ConfigException(Exception):
|
|
"""Exception to raise if there is a problem with the configuration data"""
|
|
|
|
|
|
def tag(key):
|
|
"""Create tag from public key"""
|
|
|
|
return b"@" + b64encode(bytes(key)) + b".ed25519"
|
|
|
|
|
|
def load_ssb_secret(filename: Optional[str] = None):
|
|
"""Load SSB keys from ``filename`` or, if unset, from ``~/.ssb/secret``"""
|
|
|
|
filename = filename or os.path.expanduser("~/.ssb/secret")
|
|
|
|
with open(filename, encoding="utf-8") as f:
|
|
config = yaml.load(f, Loader=yaml.SafeLoader)
|
|
|
|
if config["curve"] != "ed25519":
|
|
raise ConfigException("Algorithm not known: " + config["curve"])
|
|
|
|
server_prv_key = b64decode(config["private"][:-8])
|
|
return {"keypair": SigningKey(server_prv_key[:32]), "id": config["id"]}
|