danetool(1) User Commands danetool(1)
NAME
danetool - GnuTLS DANE tool
SYNOPSIS
danetool [-flags] [-flag [value]] [--option-name[[=| ]value]]
All arguments must be options.
DESCRIPTION
Tool to generate and check DNS resource records for the DANE protocol.
OPTIONS
-d num, --debug=num
Enable debugging. This option takes an integer number as its
argument. The value of num is constrained to being:
in the range 0 through 9999
Specifies the debug level.
-V, --verbose
More verbose output.
--outfile=str
Output file.
--load-pubkey=str
Loads a public key file.
This can be either a file or a PKCS #11 URL
--load-certificate=str
Loads a certificate file.
This can be either a file or a PKCS #11 URL
--dlv=str
Sets a DLV file.
This sets a DLV file to be used for DNSSEC verification.
--hash=str
Hash algorithm to use for signing.
Available hash functions are SHA1, RMD160, SHA256, SHA384,
SHA512.
--check=str
Check a host's DANE TLSA entry.
Obtains the DANE TLSA entry from the given hostname and prints
information. Note that the actual certificate of the host can be
provided using --load-certificate, otherwise danetool will con-
nect to the server to obtain it. The exit code on verification
success will be zero.
--check-ee
Check only the end-entity's certificate.
Checks the end-entity's certificate only. Trust anchors or CAs
are not considered.
--check-ca
Check only the CA's certificate.
Checks the trust anchor's and CA's certificate only. End-enti-
ties are not considered.
--tlsa-rr
Print the DANE RR data on a certificate or public key. This op-
tion must appear in combination with the following options:
host.
This command prints the DANE RR data needed to enable DANE on a
DNS server.
--host=hostname
Specify the hostname to be used in the DANE RR.
This command sets the hostname for the DANE RR.
--proto=protocol
The protocol set for DANE data (tcp, udp etc.).
This command specifies the protocol for the service set in the
DANE data.
--port=str
The port or service to connect to, for DANE data.
--app-proto
This is an alias for the --starttls-proto option.
--starttls-proto=str
The application protocol to be used to obtain the server's cer-
tificate (https, ftp, smtp, imap, ldap, xmpp, lmtp, pop3, nntp,
sieve, postgres).
When the server's certificate isn't provided danetool will con-
nect to the server to obtain the certificate. In that case it is
required to know the protocol to talk with the server prior to
initiating the TLS handshake.
--ca Whether the provided certificate or public key is a Certificate
Authority.
Marks the DANE RR as a CA certificate if specified.
--x509 Use the hash of the X.509 certificate, rather than the public
key.
This option forces the generated record to contain the hash of
the full X.509 certificate. By default only the hash of the pub-
lic key is used.
--local
This is an alias for the --domain option.
--domain, --no-domain
The provided certificate or public key is issued by the local
domain. The no-domain form will disable the option. This op-
tion is enabled by default.
DANE distinguishes certificates and public keys offered via the
DNSSEC to trusted and local entities. This flag indicates that
this is a domain-issued certificate, meaning that there could be
no CA involved.
--local-dns, --no-local-dns
Use the local DNS server for DNSSEC resolving. The no-local-dns
form will disable the option.
This option will use the local DNS server for DNSSEC. This is
disabled by default due to many servers not allowing DNSSEC.
--insecure
Do not verify any DNSSEC signature.
Ignores any DNSSEC signature verification results.
--inder, --no-inder
Use DER format for input certificates and private keys. The
no-inder form will disable the option.
The input files will be assumed to be in DER or RAW format. Un-
like options that in PEM input would allow multiple input data
(e.g. multiple certificates), when reading in DER format a sin-
gle data structure is read.
--inraw
This is an alias for the --inder option.
--print-raw, --no-print-raw
Print the received DANE data in raw format. The no-print-raw
form will disable the option.
This option will print the received DANE data.
--quiet
Suppress several informational messages.
In that case on the exit code can be used as an indication of
verification success
-v arg, --version=arg
Output version of program and exit. The default mode is `v', a
simple version. The `c' mode will print copyright information
and `n' will print the full copyright notice.
-h, --help
Display usage information and exit.
-!, --more-help
Pass the extended usage information through a pager.
EXAMPLES
DANE TLSA RR generation
To create a DANE TLSA resource record for a certificate (or public key)
that was issued localy and may or may not be signed by a CA use the
following command.
$ danetool --tlsa-rr --host www.example.com --load-certificate cert.pem
To create a DANE TLSA resource record for a CA signed certificate,
which will be marked as such use the following command.
$ danetool --tlsa-rr --host www.example.com --load-certificate cert.pem --no-domain
The former is useful to add in your DNS entry even if your certificate
is signed by a CA. That way even users who do not trust your CA will be
able to verify your certificate using DANE.
In order to create a record for the CA signer of your certificate use
the following.
$ danetool --tlsa-rr --host www.example.com --load-certificate cert.pem --ca --no-domain
To read a server's DANE TLSA entry, use:
$ danetool --check www.example.com --proto tcp --port 443
To verify an HTTPS server's DANE TLSA entry, use:
$ danetool --check www.example.com --proto tcp --port 443 --load-certificate chain.pem
To verify an SMTP server's DANE TLSA entry, use:
$ danetool --check www.example.com --proto tcp --starttls-proto=smtp --load-certificate chain.pem
EXIT STATUS
One of the following exit values will be returned:
0 (EXIT_SUCCESS)
Successful program execution.
1 (EXIT_FAILURE)
The operation failed or the command syntax was not valid.
SEE ALSO
certtool (1)
AUTHORS
COPYRIGHT
Copyright (C) 2020-2021 Free Software Foundation, and others all rights
reserved. This program is released under the terms of the GNU General
Public License, version 3 or later
BUGS
Please send bug reports to: bugs@gnutls.org
3.7.9 09 Feb 2023 danetool(1)
Generated by dwww version 1.15 on Sat Jun 29 02:10:07 CEST 2024.