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NAME | SYNOPSIS | DESCRIPTION | OPTIONS | EXAMPLES | EXIT STATUS | SEE ALSO | AUTHORS | COPYRIGHT | BUGS | COLOPHON |
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danetool(1) User Commands danetool(1)
danetool - GnuTLS DANE tool
danetool [-flags] [-flag [value]] [--option-name[[=| ]value]]
All arguments must be options.
Tool to generate and check DNS resource records for the DANE
protocol.
-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 connect 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-entities are not considered.
--tlsa-rr
Print the DANE RR data on a certificate or public key.
This option 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
certificate (https, ftp, smtp, imap, ldap, xmpp, lmtp,
pop3, nntp, sieve, postgres).
When the server's certificate isn't provided danetool will
connect 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 public 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 option 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. Unlike options that in PEM input would allow
multiple input data (e.g. multiple certificates), when
reading in DER format a single 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.
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
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.
certtool(1)
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
Please send bug reports to: bugs@gnutls.org
This page is part of the GnuTLS (GnuTLS Transport Layer Security
Library) project. Information about the project can be found at
⟨http://www.gnutls.org/⟩. If you have a bug report for this
manual page, send it to bugs@gnutls.org. This page was obtained
from the tarball gnutls-3.7.8.tar.xz fetched from
⟨http://www.gnutls.org/download.html⟩ on 2022-12-17. If you
discover any rendering problems in this HTML version of the page,
or you believe there is a better or more up-to-date source for
the page, or you have corrections or improvements to the
information in this COLOPHON (which is not part of the original
manual page), send a mail to man-pages@man7.org
3.7.8 27 Sep 2022 danetool(1)
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