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       dnssec-dsfromkey - DNSSEC DS RR generation tool


       dnssec-dsfromkey [-v level] [-1] [-2] [-a alg] [-C] [-l domain] [-T TTL] {keyfile}

       dnssec-dsfromkey {-s} [-1] [-2] [-a alg] [-K directory] [-l domain] [-s] [-c class]
                        [-T TTL] [-f file] [-A] [-v level] {dnsname}

       dnssec-dsfromkey [-h] [-V]


       dnssec-dsfromkey outputs the Delegation Signer (DS) resource record (RR), as defined in
       RFC 3658 and RFC 4509, for the given key(s).


           Use SHA-1 as the digest algorithm (the default is to use both SHA-1 and SHA-256).

           Use SHA-256 as the digest algorithm.

       -a algorithm
           Select the digest algorithm. The value of algorithm must be one of SHA-1 (SHA1),
           SHA-256 (SHA256), GOST or SHA-384 (SHA384). These values are case insensitive.

           Generate CDS records rather than DS records. This is mutually exclusive with
           generating lookaside records.

       -T TTL
           Specifies the TTL of the DS records.

       -K directory
           Look for key files (or, in keyset mode, keyset- files) in directory.

       -f file
           Zone file mode: in place of the keyfile name, the argument is the DNS domain name of a
           zone master file, which can be read from file. If the zone name is the same as file,
           then it may be omitted.

           If file is set to "-", then the zone data is read from the standard input. This makes
           it possible to use the output of the dig command as input, as in:

           dig dnskey | dnssec-dsfromkey -f -

           Include ZSKs when generating DS records. Without this option, only keys which have the
           KSK flag set will be converted to DS records and printed. Useful only in zone file

       -l domain
           Generate a DLV set instead of a DS set. The specified domain is appended to the name
           for each record in the set. The DNSSEC Lookaside Validation (DLV) RR is described in
           RFC 4431. This is mutually exclusive with generating CDS records.

           Keyset mode: in place of the keyfile name, the argument is the DNS domain name of a
           keyset file.

       -c class
           Specifies the DNS class (default is IN). Useful only in keyset or zone file mode.

       -v level
           Sets the debugging level.

           Prints usage information.

           Prints version information.


       To build the SHA-256 DS RR from the keyfile name, the following
       command would be issued:

       dnssec-dsfromkey -2

       The command would print something like: IN DS 26160 5 2 3A1EADA7A74B8D0BA86726B0C227AA85AB8BBD2B2004F41A868A54F0


       The keyfile can be designed by the key identification Knnnn.+aaa+iiiii or the full file
       name Knnnn.+aaa+iiiii.key as generated by dnssec-keygen(8).

       The keyset file name is built from the directory, the string keyset- and the dnsname.


       A keyfile error can give a "file not found" even if the file exists.


       dnssec-keygen(8), dnssec-signzone(8), BIND 9 Administrator Reference Manual, RFC 3658, RFC
       4431.  RFC 4509.


       Internet Systems Consortium, Inc.


       Copyright © 2008-2012, 2014-2016, 2018, 2019 Internet Systems Consortium, Inc. ("ISC")