codekingpro/portable-devtools

1# Copyright (C) Dnspython Contributors, see LICENSE for text of ISC license2 3# Copyright (C) 2003-2007, 2009-2011 Nominum, Inc.4#5# Permission to use, copy, modify, and distribute this software and its6# documentation for any purpose with or without fee is hereby granted,7# provided that the above copyright notice and this permission notice8# appear in all copies.9#10# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES11# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF12# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR13# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES14# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN15# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT16# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.17 18"""A place to store TSIG keys."""19 20import base6421from typing import Any, Dict22 23import dns.name24import dns.tsig25 26 27def from_text(textring: Dict[str, Any]) -> Dict[dns.name.Name, dns.tsig.Key]:28    """Convert a dictionary containing (textual DNS name, base64 secret)29    pairs into a binary keyring which has (dns.name.Name, bytes) pairs, or30    a dictionary containing (textual DNS name, (algorithm, base64 secret))31    pairs into a binary keyring which has (dns.name.Name, dns.tsig.Key) pairs.32    @rtype: dict"""33 34    keyring = {}35    for name, value in textring.items():36        kname = dns.name.from_text(name)37        if isinstance(value, str):38            keyring[kname] = dns.tsig.Key(kname, value).secret39        else:40            (algorithm, secret) = value41            keyring[kname] = dns.tsig.Key(kname, secret, algorithm)42    return keyring43 44 45def to_text(keyring: Dict[dns.name.Name, Any]) -> Dict[str, Any]:46    """Convert a dictionary containing (dns.name.Name, dns.tsig.Key) pairs47    into a text keyring which has (textual DNS name, (textual algorithm,48    base64 secret)) pairs, or a dictionary containing (dns.name.Name, bytes)49    pairs into a text keyring which has (textual DNS name, base64 secret) pairs.50    @rtype: dict"""51 52    textring = {}53 54    def b64encode(secret):55        return base64.encodebytes(secret).decode().rstrip()56 57    for name, key in keyring.items():58        tname = name.to_text()59        if isinstance(key, bytes):60            textring[tname] = b64encode(key)61        else:62            if isinstance(key.secret, bytes):63                text_secret = b64encode(key.secret)64            else:65                text_secret = str(key.secret)66 67            textring[tname] = (key.algorithm.to_text(), text_secret)68    return textring69