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Diffstat (limited to '')
| -rw-r--r-- | bin/python/isc/keymgr.py.in | 207 |
1 files changed, 207 insertions, 0 deletions
diff --git a/bin/python/isc/keymgr.py.in b/bin/python/isc/keymgr.py.in new file mode 100644 index 0000000..67fe4c7 --- /dev/null +++ b/bin/python/isc/keymgr.py.in @@ -0,0 +1,207 @@ +# Copyright (C) Internet Systems Consortium, Inc. ("ISC") +# +# SPDX-License-Identifier: MPL-2.0 +# +# 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, sys, argparse, glob, re, time, calendar, pprint +from collections import defaultdict + +prog = "dnssec-keymgr" + +from isc import dnskey, keydict, keyseries, policy, parsetab, utils + + +############################################################################ +# print a fatal error and exit +############################################################################ +def fatal(*args, **kwargs): + print(*args, **kwargs) + sys.exit(1) + + +############################################################################ +# find the location of an external command +############################################################################ +def set_path(command, default=None): + """find the location of a specified command. If a default is supplied, + exists and it's an executable, we use it; otherwise we search PATH + for an alternative. + :param command: command to look for + :param default: default value to use + :return: PATH with the location of a suitable binary + """ + 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 = directory + os.sep + command + if os.path.isfile(fpath) and os.access(fpath, os.X_OK): + break + fpath = None + + return fpath + + +############################################################################ +# parse arguments +############################################################################ +def parse_args(): + """Read command line arguments, returns 'args' object + :return: args object properly prepared + """ + + keygen = set_path( + "dnssec-keygen", os.path.join(utils.prefix("sbin"), "dnssec-keygen") + ) + settime = set_path( + "dnssec-settime", os.path.join(utils.prefix("sbin"), "dnssec-settime") + ) + + parser = argparse.ArgumentParser( + description=prog + ": schedule " + "DNSSEC key rollovers according to a " + "pre-defined policy" + ) + + parser.add_argument( + "zone", + type=str, + nargs="*", + default=None, + help="Zone(s) to which the policy should be applied " + + "(default: all zones in the directory)", + ) + parser.add_argument( + "-K", dest="path", type=str, help="Directory containing keys", metavar="dir" + ) + parser.add_argument( + "-c", dest="policyfile", type=str, help="Policy definition file", metavar="file" + ) + parser.add_argument( + "-g", + dest="keygen", + default=keygen, + type=str, + help="Path to 'dnssec-keygen'", + metavar="path", + ) + parser.add_argument( + "-r", + dest="randomdev", + type=str, + default=None, + help="DEPRECATED", + metavar="path", + ) + parser.add_argument( + "-s", + dest="settime", + default=settime, + type=str, + help="Path to 'dnssec-settime'", + metavar="path", + ) + parser.add_argument( + "-k", + dest="no_zsk", + action="store_true", + default=False, + help="Only apply policy to key-signing keys (KSKs)", + ) + parser.add_argument( + "-z", + dest="no_ksk", + action="store_true", + default=False, + help="Only apply policy to zone-signing keys (ZSKs)", + ) + parser.add_argument( + "-f", + "--force", + dest="force", + action="store_true", + default=False, + help="Force updates to key events " + "even if they are in the past", + ) + parser.add_argument( + "-q", + "--quiet", + dest="quiet", + action="store_true", + default=False, + help="Update keys silently", + ) + parser.add_argument("-v", "--version", action="version", version=utils.version) + + args = parser.parse_args() + + if args.randomdev: + fatal("ERROR: -r option has been deprecated.") + + if args.no_zsk and args.no_ksk: + fatal("ERROR: -z and -k cannot be used together.") + + if args.keygen is None: + fatal("ERROR: dnssec-keygen not found") + + if args.settime is None: + fatal("ERROR: dnssec-settime not found") + + # if a policy file was specified, check that it exists. + # if not, use the default file, unless it doesn't exist + if args.policyfile is not None: + if not os.path.exists(args.policyfile): + fatal('ERROR: Policy file "%s" not found' % args.policyfile) + else: + args.policyfile = os.path.join(utils.sysconfdir, "dnssec-policy.conf") + if not os.path.exists(args.policyfile): + args.policyfile = None + + return args + + +############################################################################ +# main +############################################################################ +def main(): + args = parse_args() + + # As we may have specific locations for the binaries, we put that info + # into a context object that can be passed around + context = { + "keygen_path": args.keygen, + "settime_path": args.settime, + "keys_path": args.path, + "randomdev": args.randomdev, + } + + try: + dp = policy.dnssec_policy(args.policyfile) + except Exception as e: + fatal("Unable to load DNSSEC policy: " + str(e)) + + try: + kd = keydict(dp, path=args.path, zones=args.zone) + except Exception as e: + fatal("Unable to build key dictionary: " + str(e)) + + try: + ks = keyseries(kd, context=context) + except Exception as e: + fatal("Unable to build key series: " + str(e)) + + try: + ks.enforce_policy( + dp, ksk=args.no_zsk, zsk=args.no_ksk, force=args.force, quiet=args.quiet + ) + except Exception as e: + fatal("Unable to apply policy: " + str(e)) |