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e8bf93bd90
git-svn-id: https://linkchecker.svn.sourceforge.net/svnroot/linkchecker/trunk/linkchecker@3194 e7d03fd6-7b0d-0410-9947-9c21f3af8025
63 lines
1.9 KiB
Python
63 lines
1.9 KiB
Python
# -*- coding: iso-8859-1 -*-
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# Copyright (C) 2003, 2004 Nominum, Inc.
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#
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# Permission to use, copy, modify, and distribute this software and its
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# documentation for any purpose with or without fee is hereby granted,
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# provided that the above copyright notice and this permission notice
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# appear in all copies.
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#
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# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
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# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
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# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
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# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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"""Common DNSSEC-related functions and constants."""
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RSAMD5 = 1
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DH = 2
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DSA = 3
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ECC = 4
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INDIRECT = 252
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PRIVATEDNS = 253
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PRIVATEOID = 254
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_algorithm_by_text = {
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'RSAMD5' : RSAMD5,
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'DH' : DH,
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'DSA' : DSA,
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'ECC' : ECC,
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'INDIRECT' : INDIRECT,
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'PRIVATEDNS' : PRIVATEDNS,
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'PRIVATEOID' : PRIVATEOID,
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}
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# We construct the inverse mapping programmatically to ensure that we
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# cannot make any mistakes (e.g. omissions, cut-and-paste errors) that
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# would cause the mapping not to be true inverse.
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_algorithm_by_value = dict([(y, x) for x, y in _algorithm_by_text.iteritems()])
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class UnknownAlgorithm(StandardError):
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"""Raised if an algorithm is unknown."""
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pass
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def algorithm_from_text(text):
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"""Convert text into a DNSSEC algorithm value
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@rtype: int"""
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value = _algorithm_by_text.get(text.upper())
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if value is None:
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value = int(text)
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return value
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def algorithm_to_text(value):
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"""Convert a DNSSEC algorithm value to text
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@rtype: string"""
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text = _algorithm_by_value.get(value)
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if text is None:
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text = str(value)
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return text
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