tlsa (1)

tlsa [-h] [--verify] [-create] [--version] [-4] [-6--insecure] [--resolv.conf /PATH/TO/RESOLV.CONF] [--port PORT] [--protocol {tcp,udp,sctp}] [--ponly-rr] [--ca-cert /PATH/TO/CERTSTORE ] [--quiet] [--certificate CERTIFICATE ] [--output {rfc,generic,both}] [-usage {0,1,2,3} ] [--selector {0,1}] [-mtype {0,1,2} ] hostname

tlsa generates RFC-6698 TLSA DNS records. To generate these records for older nameserver implementations that do not yet support the TLSA record, specify --output generic to output the tlsa data in Generic Record (RFC-3597) format. Records are generated by connecting to the website using SSL and grabbing the (EE) certificate and the CA chain. Depending on the type and selector used, this information is used to generate TLSA records. Currently. tlsa has no AXFR support for en-mass TLSA record generation.

--create

Create a TLSA record

--verify

Verify a TLSA record

---protocol tcp | udp | sctp

Use a specific transport protocol (default: tcp)

--resolvconf FILE

Specify a custom resolv.conf file (default: /etc/resolv.conf)

--port PORT

Use specified port (default: 443)

--only-rr

Only print the DNS TLSA record

--certificate file.crt

Use specified certificate file, instead of retrieving the certificate from the server

--ca-cert directory

Use specified directory containing CA bundles for CA validation (default:/etc/pki/tls/certs)

--output rfc | generic | both

Output format of TLSA record. "TLSA" for rfc, "TYPE52" for generic (default: rfc)

--usage0 | 1 | 2 | 3

Usage type: public CA (0), EE match validated by public CA (1), private CA (2), private EE (3) (default:3)

--selector0 | 1

The selector type describes what the type covers - full certificate (0) or public key (1) (default:0)

--mtype0 | 1 | 2

Type of the TLSA data. Exact match on content (0), SHA256 (1) or SHA512 (2) (default:0)

If neither create or verify is specified, create is used.

tlsa requires the following python libraries: unbound, m2crypto, argparse and ipaddr

ipv4/ipv6 handling

typical usage:

tlsa www.fedoraproject.org

tlsa --verify -4 nohats.ca

tlsa --create --insecure fedoraproject.org

sshfp(1) ssh-keygen(1)and RFC 6698

\m[blue]http://people.redhat.com/pwouters/hash-slinger/\m[]

\m[blue]http://os3sec.org/\m[]

Pieter Lexis <[email protected]>

Copyright 2012

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 2 of the License, or (at your option) any later version. See <\m[blue]http://www.fsf.org/copyleft/gpl.txt\m[]>.

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 (file COPYING in the distribution) for more details.