ldns-dane(1)ldns-dane(1)NAMEldns-dane - verify or create TLS authentication with DANE (RFC6698)
SYNOPSISldns-dane [OPTIONS] verify name port
ldns-dane [OPTIONS] -t tlsafile verify
ldns-dane [OPTIONS] name port create
[ Certificate-usage [ Selector [ Matching-type ] ] ]
ldns-dane-h
ldns-dane-v
DESCRIPTION
In the first form: A TLS connection to name:port is established. The
TLSA resource record(s) for name are used to authenticate the connec‐
tion.
In the second form: The TLSA record(s) are read from tlsafile and used
to authenticate the TLS service they reference.
In the third form: A TLS connection to name:port is established and
used to create the TLSA resource record(s) that would authenticate the
connection. The parameters for TLSA rr creation are:
Certificate-usage:
0 CA constraint
1 Service certificate constraint
2 Trust anchor assertion
3 Domain-issued certificate (default)
Selector:
0 Full certificate (default)
1 SubjectPublicKeyInfo
Matching-type:
0 No hash used
1 SHA-256 (default)
2 SHA-512
In stead of numbers the first few letters of the value may be used.
Except for the hash algorithm name, where the full name must be speci‐
fied.
OPTIONS-4 TLS connect IPv4 only
-6 TLS connect IPv6 only
-a address
Don't try to resolve name, but connect to address instead.
This option may be given more than once.
-b print "name. TYPE52 \# size hexdata" form instead of TLSA pre‐
sentation format.
-c certfile
Do not TLS connect to name:port, but authenticate (or make TLSA
records) for the certificate (chain) in certfile instead.
-d Assume DNSSEC validity even when the TLSA records were acquired
insecure or were bogus.
-f CAfile
Use CAfile to validate. Default is /etc/pki/tls/certs/ca-bun‐
dle.trust.crt
-h Print short usage help
-i Interact after connecting.
-k keyfile
Specify a file that contains a trusted DNSKEY or DS rr. Key(s)
are used when chasing signatures (i.e. -S is given).
This option may be given more than once.
Alternatively, if -k is not specified, and a default trust
anchor (/var/lib/unbound/root.key) exists and contains a valid
DNSKEY or DS record, it will be used as the trust anchor.
-n Do not verify server name in certificate.
-o offset
When creating a "Trust anchor assertion" TLSA resource record,
select the offsetth certificate offset from the end of the vali‐
dation chain. 0 means the last certificate, 1 the one but last,
2 the second but last, etc.
When offset is -1 (the default), the last certificate is used
(like with 0) that MUST be self-signed. This can help to make
sure that the intended (self signed) trust anchor is actually
present in the server certificate chain (which is a DANE
requirement).
-p CApath
Use certificates in the CApath directory to validate. Default is
/etc/pki/tls/certs/
-s When creating TLSA resource records with the "CA Constraint" and
the "Service Certificate Constraint" certificate usage, do not
validate and assume PKIX is valid.
For "CA Constraint" this means that verification should end with
a self-signed certificate.
-S Chase signature(s) to a known key.
Without this option, the local network is trusted to provide a
DNSSEC resolver (i.e. AD bit is checked).
-t tlsafile
Read TLSA record(s) from tlsafile. When name and port are also
given, only TLSA records that match the name, port and transport
are used. Otherwise the owner name of the TLSA record(s) will be
used to determine name, port and transport.
-u Use UDP transport instead of TCP.
-v Show version and exit.
FILES
/var/lib/unbound/root.key
The file from which trusted keys are loaded for signature chas‐
ing, when no -k option is given.
SEE ALSOunbound-anchor(8)AUTHOR
Written by the ldns team as an example for ldns usage.
REPORTING BUGS
Report bugs to ldns-team@nlnetlabs.nl.
COPYRIGHT
Copyright (C) 2012 NLnet Labs. This is free software. There is NO war‐
ranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PUR‐
POSE.
17 September 2012 ldns-dane(1)
