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"""
This file is part of Ascension.
Copyright (C) 2018-2022 GNUnet e.V.
Ascension is free software: you can redistribute it and/or modify it
under the terms of the GNU Affero General Public License as published
by the Free Software Foundation, either version 3 of the License,
or (at your option) any later version.
Ascension is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
SPDX-License-Identifier: AGPL3.0-or-later
Author: rexxnor
"""
import shlex
import dns.name
import dns.tsig
#@staticmethod
def parse_bind_keyfile(keyring: str) -> dict[dns.name.Name, dns.tsig.Key]:
"""
Reads a BIND style keyfile and creates a dictionary in the form of:
dict(dns.name.Name: dns.tsig.Key)
"""
if not keyring:
return None
with open(keyring, 'r', encoding='utf-8') as keyfile:
ast = shlex.shlex(keyfile.read())
ast.whitespace_split = True
keydict = {}
while True:
while ast.get_token() == "key":
keyname = dns.name.from_text(ast.get_token())
_ = ast.get_token()
if ast.get_token() == "algorithm":
keyalgo = ast.get_token().strip(";")
if ast.get_token() == "secret":
keysecret = ast.get_token().strip(";")
keydict[keyname] = dns.tsig.Key(keyname, keysecret, keyalgo)
if ast.get_token():
continue
break
return keydict
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