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59 lines
1.8 KiB
Python
59 lines
1.8 KiB
Python
# Copyright (C) Internet Systems Consortium, Inc. ("ISC")
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#
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# SPDX-License-Identifier: MPL-2.0
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#
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# This Source Code Form is subject to the terms of the Mozilla Public
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# License, v. 2.0. If a copy of the MPL was not distributed with this
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# file, you can obtain one at https://mozilla.org/MPL/2.0/.
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#
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# See the COPYRIGHT file distributed with this work for additional
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# information regarding copyright ownership.
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import os
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import sys
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import re
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from subprocess import Popen, PIPE
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########################################################################
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# Exceptions
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########################################################################
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class KeyZoneException(Exception):
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pass
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########################################################################
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# class keyzone
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########################################################################
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class keyzone:
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"""reads a zone file to find data relevant to keys"""
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def __init__(self, name, filename, czpath):
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self.maxttl = None
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self.keyttl = None
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if not name:
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return
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if not czpath or not os.path.isfile(czpath) or not os.access(czpath, os.X_OK):
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raise KeyZoneException('"named-compilezone" not found')
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return
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maxttl = keyttl = None
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fp, _ = Popen(
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[czpath, "-o", "-", name, filename], stdout=PIPE, stderr=PIPE
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).communicate()
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for line in fp.splitlines():
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if type(line) is not str:
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line = line.decode("ascii")
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if re.search("^[:space:]*;", line):
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continue
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fields = line.split()
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if not maxttl or int(fields[1]) > maxttl:
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maxttl = int(fields[1])
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if fields[3] == "DNSKEY":
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keyttl = int(fields[1])
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self.keyttl = keyttl
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self.maxttl = maxttl
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