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coverage.py

############################################################################
# Copyright (C) Internet Systems Consortium, Inc. ("ISC")
#
# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.
#
# See the COPYRIGHT file distributed with this work for additional
# information regarding copyright ownership.
############################################################################

from __future__ import print_function
import os
import sys
import argparse
import glob
import re
import time
import calendar
import pprint
from collections import defaultdict

prog = 'dnssec-coverage'

from isc import dnskey, eventlist, keydict, keyevent, keyzone, utils

############################################################################
# print a fatal error and exit
############################################################################
def fatal(*args, **kwargs):
    print(*args, **kwargs)
    sys.exit(1)

############################################################################
# output:
############################################################################
_firstline = True
def output(*args, **kwargs):
    """output text, adding a vertical space this is *not* the first
    first section being printed since a call to vreset()"""
    global _firstline
    if 'skip' in kwargs:
        skip = kwargs['skip']
        kwargs.pop('skip', None)
    else:
        skip = True
    if _firstline:
        _firstline = False
    elif skip:
        print('')
    if args:
        print(*args, **kwargs)

def vreset():
    """reset vertical spacing"""
    global _firstline
    _firstline = True

############################################################################
# parse_time
############################################################################
def parse_time(s):
    """ convert a formatted time (e.g., 1y, 6mo, 15mi, etc) into seconds
    :param s: String with some text representing a time interval
    :return: Integer with the number of seconds in the time interval
    """
    s = s.strip()

# if s is an integer, we're done already
    try:
        return int(s)
    except ValueError:
        pass

# try to parse as a number with a suffix indicating unit of time
    r = re.compile(r'([0-9][0-9]*)\s*([A-Za-z]*)')
    m = r.match(s)
    if not m:
        raise ValueError("Cannot parse %s" % s)
    n, unit = m.groups()
    n = int(n)
    unit = unit.lower()
    if unit.startswith('y'):
        return n * 31536000
    elif unit.startswith('mo'):
        return n * 2592000
    elif unit.startswith('w'):
        return n * 604800
    elif unit.startswith('d'):
        return n * 86400
    elif unit.startswith('h'):
        return n * 3600
    elif unit.startswith('mi'):
        return n * 60
    elif unit.startswith('s'):
        return n
    else:
        raise ValueError("Invalid suffix %s" % unit)

############################################################################
# set_path:
############################################################################
def set_path(command, default=None):
    """ find the location of a specified command.  if a default is supplied
    and it works, we use it; otherwise we search PATH for a match.
    :param command: string with a command to look for in the path
    :param default: default location to use
    :return: detected location for the desired command
    """

fpath = default
    if not fpath or not os.path.isfile(fpath) or not os.access(fpath, os.X_OK):
        path = os.environ["PATH"]
        if not path:
            path = os.path.defpath
        for directory in path.split(os.pathsep):
            fpath = os.path.join(directory, command)
            if os.path.isfile(fpath) and os.access(fpath, os.X_OK):
                break
            fpath = None

return fpath

############################################################################
# parse_args:
############################################################################
def parse_args():
    """Read command line arguments, set global 'args' structure"""
    compilezone = set_path('named-compilezone',
                           os.path.join(utils.prefix('sbin'),
                           'named-compilezone'))

parser = argparse.ArgumentParser(description=prog + ': checks future ' +
                                     'DNSKEY coverage for a zone')

parser.add_argument('zone', type=str, nargs='*', default=None,
                        help='zone(s) to check' +
                        '(default: all zones in the directory)')
    parser.add_argument('-K', dest='path', default='.', type=str,
                        help='a directory containing keys to process',
                        metavar='dir')
    parser.add_argument('-f', dest='filename', type=str,
                        help='zone master file', metavar='file')
    parser.add_argument('-m', dest='maxttl', type=str,
                        help='the longest TTL in the zone(s)',
                        metavar='time')
    parser.add_argument('-d', dest='keyttl', type=str,
                        help='the DNSKEY TTL', metavar='time')
    parser.add_argument('-r', dest='resign', default='1944000',
                        type=str, help='the RRSIG refresh interval '
                                       'in seconds [default: 22.5 days]',
                        metavar='time')
    parser.add_argument('-c', dest='compilezone',
                        default=compilezone, type=str,
                        help='path to \'named-compilezone\'',
                        metavar='path')
    parser.add_argument('-l', dest='checklimit',
                        type=str, default='0',
                        help='Length of time to check for '
                             'DNSSEC coverage [default: 0 (unlimited)]',
                        metavar='time')
    parser.add_argument('-z', dest='no_ksk',
                        action='store_true', default=False,
                        help='Only check zone-signing keys (ZSKs)')
    parser.add_argument('-k', dest='no_zsk',
                        action='store_true', default=False,
                        help='Only check key-signing keys (KSKs)')
    parser.add_argument('-D', '--debug', dest='debug_mode',
                        action='store_true', default=False,
                        help='Turn on debugging output')
    parser.add_argument('-v', '--version', action='version',
                        version=utils.version)

args = parser.parse_args()

if args.no_zsk and args.no_ksk:
        fatal("ERROR: -z and -k cannot be used together.")
    elif args.no_zsk or args.no_ksk:
        args.keytype = "KSK" if args.no_zsk else "ZSK"
    else:
        args.keytype = None

if args.filename and len(args.zone) > 1:
        fatal("ERROR: -f can only be used with one zone.")

# convert from time arguments to seconds
    try:
        if args.maxttl:
            m = parse_time(args.maxttl)
            args.maxttl = m
    except ValueError:
        pass

try:
        if args.keyttl:
            k = parse_time(args.keyttl)
            args.keyttl = k
    except ValueError:
        pass

try:
        if args.resign:
            r = parse_time(args.resign)
            args.resign = r
    except ValueError:
        pass

try:
        if args.checklimit:
            lim = args.checklimit
            r = parse_time(args.checklimit)
            if r == 0:
                args.checklimit = None
            else:
                args.checklimit = time.time() + r
    except ValueError:
        pass

# if we've got the values we need from the command line, stop now
    if args.maxttl and args.keyttl:
        return args

# load keyttl and maxttl data from zonefile
    if args.zone and args.filename:
        try:
            zone = keyzone(args.zone[0], args.filename, args.compilezone)
            args.maxttl = args.maxttl or zone.maxttl
            args.keyttl = args.maxttl or zone.keyttl
        except Exception as e:
            print("Unable to load zone data from %s: " % args.filename, e)

if not args.maxttl:
        output("WARNING: Maximum TTL value was not specified.  Using 1 week\n"
               "\t (604800 seconds); re-run with the -m option to get more\n"
               "\t accurate results.")
        args.maxttl = 604800

return args

############################################################################
# Main
############################################################################
def main():
    args = parse_args()

print("PHASE 1--Loading keys to check for internal timing problems")

try:
        kd = keydict(path=args.path, zone=args.zone, keyttl=args.keyttl)
    except Exception as e:
        fatal('ERROR: Unable to build key dictionary: ' + str(e))

for key in kd:
        key.check_prepub(output)
        if key.sep:
            key.check_postpub(output)
        else:
            key.check_postpub(output, args.maxttl + args.resign)

output("PHASE 2--Scanning future key events for coverage failures")
    vreset()

try:
        elist = eventlist(kd)
    except Exception as e:
        fatal('ERROR: Unable to build event list: ' + str(e))

errors = False
    if not args.zone:
        if not elist.coverage(None, args.keytype, args.checklimit, output):
            errors = True
    else:
        for zone in args.zone:
            try:
                if not elist.coverage(zone, args.keytype,
                                      args.checklimit, output):
                    errors = True
            except:
                output('ERROR: Coverage check failed for zone ' + zone)

sys.exit(1 if errors else 0)

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Name	Type	Size	Owner/Group	Permission	Last Modified	Actions
.	dir	-	root/root	0755	2025-04-16 01:31:11
..	dir	-	root/root	0755	2025-04-16 01:31:11
__init__.py	text/x-script.python	936 B	root/root	0644	2025-03-28 11:25:29
__init__.pyc	text/x-bytecode.python	617 B	root/root	0644	2025-03-28 11:32:07
__init__.pyo	text/x-bytecode.python	617 B	root/root	0644	2025-03-28 11:32:07
checkds.py	text/x-script.python	6.49 KB	root/root	0644	2025-03-28 11:25:29
checkds.pyc	text/x-bytecode.python	5.29 KB	root/root	0644	2025-03-28 11:32:07
checkds.pyo	text/x-bytecode.python	5.29 KB	root/root	0644	2025-03-28 11:32:07
coverage.py	text/x-script.python	9.61 KB	root/root	0644	2025-03-28 11:25:29
coverage.pyc	text/x-bytecode.python	7.37 KB	root/root	0644	2025-03-28 11:32:07
coverage.pyo	text/x-bytecode.python	7.37 KB	root/root	0644	2025-03-28 11:32:07
dnskey.py	text/x-script.python	15.9 KB	root/root	0644	2025-03-28 11:25:29
dnskey.pyc	text/x-bytecode.python	16.59 KB	root/root	0644	2025-03-28 11:32:07
dnskey.pyo	text/x-bytecode.python	16.59 KB	root/root	0644	2025-03-28 11:32:07
eventlist.py	text/x-script.python	5.71 KB	root/root	0644	2025-03-28 11:25:29
eventlist.pyc	text/x-bytecode.python	4.83 KB	root/root	0644	2025-03-28 11:32:07
eventlist.pyo	text/x-bytecode.python	4.83 KB	root/root	0644	2025-03-28 11:32:07
keydict.py	text/x-script.python	2.67 KB	root/root	0644	2025-03-28 11:25:29
keydict.pyc	text/x-bytecode.python	3.21 KB	root/root	0644	2025-03-28 11:32:07
keydict.pyo	text/x-bytecode.python	3.21 KB	root/root	0644	2025-03-28 11:32:07
keyevent.py	text/x-script.python	2.76 KB	root/root	0644	2025-03-28 11:25:29
keyevent.pyc	text/x-bytecode.python	2.32 KB	root/root	0644	2025-03-28 11:32:07
keyevent.pyo	text/x-bytecode.python	2.32 KB	root/root	0644	2025-03-28 11:32:07
keymgr.py	text/x-script.python	6.35 KB	root/root	0644	2025-03-28 11:25:29
keymgr.pyc	text/x-bytecode.python	4.91 KB	root/root	0644	2025-03-28 11:32:07
keymgr.pyo	text/x-bytecode.python	4.91 KB	root/root	0644	2025-03-28 11:32:07
keyseries.py	text/x-script.python	7.34 KB	root/root	0644	2025-03-28 11:25:29
keyseries.pyc	text/x-bytecode.python	5 KB	root/root	0644	2025-03-28 11:32:07
keyseries.pyo	text/x-bytecode.python	5 KB	root/root	0644	2025-03-28 11:32:07
keyzone.py	text/x-script.python	1.86 KB	root/root	0644	2025-03-28 11:25:29
keyzone.pyc	text/x-bytecode.python	1.54 KB	root/root	0644	2025-03-28 11:32:07
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parsetab.py	text/plain	9.98 KB	root/root	0644	2025-03-28 11:29:53
parsetab.pyc	text/x-bytecode.python	10.36 KB	root/root	0644	2025-03-28 11:32:07
parsetab.pyo	text/x-bytecode.python	10.36 KB	root/root	0644	2025-03-28 11:32:07
policy.py	text/x-script.python	25.8 KB	root/root	0644	2025-03-28 11:25:29
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utils.py	text/x-script.python	2.17 KB	root/root	0644	2025-03-28 11:25:29
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