# danetool

## 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 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.
    


## EXAMPLES



                  **DANE TLSA RR generation**
    
                  To create a DANE TLSA resource record for a certificate (or
                  public key) that was issued locally 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.
    


## BUGS



           Please send bug reports to: bugs@gnutls.org
    


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