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Edit File : coverage.py \| Size : 9.75 KB
############################################################################ # 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 https://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.") # strip trailing dots if any args.zone = [x[:-1] if (len(x) > 1 and x[-1] == '.') else x for x in args.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, zones=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) Back

Edit File : coverage.py | Size : 9.75 KB

############################################################################
# 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 https://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.")

# strip trailing dots if any
    args.zone = [x[:-1] if (len(x) > 1 and x[-1] == '.') else x
                        for x in args.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, zones=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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