DSKM DNSsec Key Management

Copyright (c) 2012-2019 Axel Rau, [email protected]

This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program. If not, see <http://www.gnu.org/licenses/>.

Purpose:

DNSsec key management add-on to ISC bind 9.9.x for zones with

auto-dnssec maintain; inline-signing yes;

.Creates and deletes keys, submits delegation signer (DS) resource records or public DNSKEYs to parent. Zones may be local, public or reverse (IP4 or IP6).

Requirements:

bind 9.12+ http://www.isc.org/software/bind python 3.6+ pycryptodome pypi.org ecdsa pypi.org dnspython pypi.org, http://www.dnspython.org/ script http://lamb.cc/script/ (must be installed manually)

Installation:

Optionally create a virtual environment. Download the script package from http://lamb.cc/script/, extract it to /usr/local/src and install it as

pip install /usr/local/src/script-1.7.2

Then install DSKM as

pip install DSKM

After installation of the required software, query usage of the main program at top level:

# operate_dskm -h
Usage: operate_dskm [options]

DSKM DNSsec Key Management Do maintenace of DNSsec keys. Create and delete
them as necessary. Submit/cancle DS-RR to/at parent registrar.

Options:
  -h, --help            show this help message and exit
  -c, --cron            Run as cronjob. Each run increments timeout timer.
  -S STOPSIGNINGOFZONE, --stopSigningOfZone=STOPSIGNINGOFZONE
                        Initiate procedure to make a zone unsigned. Argument
                        is zone name.
  -f, --force           Force deletion of keys (ignore delete time) while
                        stopping signing of zone.
  -r, --registrar_status
                        Query list of completed and pending requests of all
                        registrars and terminate.
  -p, --purge_all_registrar_completion_info
                        Purge all completion info of completed and pending
                        requests of all registrars and terminate.
  -q QUERY_STATUS, --query_status=QUERY_STATUS
                        Give detailed registrar result status about <request-
                        id>.
  -t, --test_registrar_DS_submission
                        Delete and re-submit current DS-RR to registrar.
  -n, --dry-run         Do not really change any data at registrar with
                        --test_registrar_DS_submission.
  -d, --debug           Turn on debugging.
  -v, --verbose         Be more verbose.

Configuration:

named.conf DSKM requires all managed zones to share a common root.

There is one directory per zone, which contains zone file, keys, bind journal files and DSKM config and status files, e.g.:

/var/named/master/signed/example.com /var/named/master/signed/sub.example.com

Corresponding named.conf fragments could look like:

options {

dnssec-enable yes; dnssec-validation yes; directory "/var/named"; ...

}

zone "example.com" IN {

type master; file "master/signed/example.com/example.com.zone"; key-directory "master/signed/example.com/"; auto-dnssec maintain; inline-signing yes; allow-query {

any;

};

};

zone "sub.example.com" IN {

type master; file "master/signed/sub.example.com/sub.example.com.zone"; key-directory "master/signed/sub.example.com/"; auto-dnssec maintain; inline-signing yes; allow-query {

any;

};

};

zone file In case you have a local subdomain, insert something like

sub IN NS localhost. $include "master/signed/example.com/sub.example.com.ds"

The included file must be empty (will be updated by DSKM). Local domain, means an internal domain with local trust anchor ("Registrar = Local" in example.com/dnssec-stat-example.com - see below)

$VIRTUAL_ENV/etcdskm_conf.py or /usr/local/etc/dskm_conf.py:

Please review the DSKM config file carefully: master

A list of IPs where the (hidden) master may be reached by the script

external_secondaries

A list of NS addresses of your public secondaries

external_recursives

A list of NS addresses of public, validating NS

registrar

Dict of dicts with account data, one per registrar. Initially implemented is

Joker for Joker.com see http://www.joker.com and Ripe (not really a registrar, but European

Regional Internet Registry)

(Names must be written literally as above)

sender, recipients, mailRelay for alarming mails, if run as cron job. ROOT_PATH

root of zone directories

The other timing and crypto constants should be self explaining. The key timing constants are 'sticky': Changing them in DSKM/conf.py does not affect active zones. The secure way to apply changed timing data to active zones would be to stop signing and start over with a vanilla conf file ( see below).

example.com/dnssec-conf-example.com

If you run the script with an empty zone directory (example.com), it creates 2 files there:

example.com/dnssec-conf-example.com example.com/dnssec-stat-example.com

You must then put the zone file there and edit the dnssec-conf-* file, which initial content is:

{

"Registrar": "Local", "Method": "unsigned"

}

'Registrar' may be one of 'Local', 'by hand', 'Joker' or 'Ripe'.

'Local' is zone with local trust anchor (private net etc.) 'by hand' is zone for which handover of DS-RR/DNSKEY-RR to

parent is done by human on behalf of an email sent by DSKM.

'Method must be changed to 'NSEC' (currently only). If you then run the script, it will create the initial keys and named will start signing the zone:

# operate_dskm -v [Scanning /var/named/master/signed] [Working at 2012-05-31T15:01:33.932455 on example.com (com )] Generating key pair..............+++ ...........+++ [Key Kexample.com.+008+26482.key created.] [example.com/KSK/26482/-1(A:2012-05-31T15:01:33, I:2012-06-02T15:01:33, D:2012-06-03T15:01:33)] Generating key pair.....................++++++ .............++++++ [Key Kexample.com.+008+27330.key created.] [example.com/ZSK/27330/-1(A:2012-05-31T15:01:34, I:2012-06-01T15:01:34, D:2012-06-02T15:01:34)] [State transition of example.com/KSK from -1 to 0(KSK1 created) after 0 retries] [State transition of example.com/ZSK from -1 to 0(ZSK1 created) after 0 retries] #

Debug- and informal messages are in square brackets, warnings start with '%' and errors start with '?'. The 3 timestamps per key are Active (start signing with this key), Inactive(stop using this key for sigs) and Delete (remove key from DNSKEY rset).

crontab: Something like

# hourly DNSsec key maintenance 55 * * * * root /usr/local/bin/python3 /usr/local/cronscripts/dnssec_key_maintenance.py -v -c >>/var/log/DSKM/dnssec_key_maintenance.log >&1

will do.