danetool(1) — Linux manual page

NAME | SYNOPSIS | DESCRIPTION | OPTIONS | EXAMPLES | EXIT STATUS | SEE ALSO | AUTHORS | COPYRIGHT | BUGS | NOTES | COLOPHON

danetool(1)                   User Commands                  danetool(1)

NAME         top

       danetool - GnuTLS DANE tool

SYNOPSIS         top

       danetool [-flags] [-flag [value]] [--option-name[[=| ]value]]

       All arguments must be options.

DESCRIPTION         top

       Tool to generate and check DNS resource records for the DANE
       protocol.

OPTIONS         top

       -d number, --debug=number
              Enable debugging.  This option takes an integer number as
              its argument.  The value of number is constrained to
              being:
                  in the range  0 through 9999

              Specifies the debug level.

       -V, --verbose
              More verbose output.  This option may appear an unlimited
              number of times.

       --infile=file
              Input file.

       --outfile=string
              Output file.

       --load-pubkey=string
              Loads a public key file.

              This can be either a file or a PKCS #11 URL

       --load-certificate=string
              Loads a certificate file.

              This can be either a file or a PKCS #11 URL

       --dlv=string
              Sets a DLV file.

              This sets a DLV file to be used for DNSSEC verification.

       --hash=string
              Hash algorithm to use for signing.

              Available hash functions are SHA1, RMD160, SHA256, SHA384,
              SHA512.

       --check=string
              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=string
              The port or service to connect to, for DANE data.

       --app-proto
              This is an alias for the --starttls-proto option.

       --starttls-proto=string
              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

       -h, --help
              Display usage information and exit.

       -!, --more-help
              Pass the extended usage information through a pager.

       -v [{v|c|n --version [{v|c|n}]}]
              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.

EXAMPLES         top

       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         top

       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.

       70  (EX_SOFTWARE)
              libopts had an internal operational error.  Please report
              it to autogen-users@lists.sourceforge.net.  Thank you.

SEE ALSO         top

           certtool (1)

AUTHORS         top

       Nikos Mavrogiannopoulos, Simon Josefsson and others; see
       /usr/share/doc/gnutls/AUTHORS for a complete list.

COPYRIGHT         top

       Copyright (C) 2000-2020 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         top

       Please send bug reports to: bugs@gnutls.org

NOTES         top

       This manual page was AutoGen-erated from the danetool option
       definitions.

COLOPHON         top

       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-3.7.1.tar.xz fetched from
       ⟨http://www.gnutls.org/download.html⟩ on 2021-04-01.  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

3.7.1                          10 Mar 2021                   danetool(1)