ldns-key2ds is used to transform a public DNSKEY RR to a DS RR. When run it will read file with a DNSKEY RR in it and it will create a .ds file with the DS RR in it.
It prints out the basename for this file (K<name>+<alg>+<id>).
By default it takes a pick of algorithm similar to the key algorithm, SHA1 for RSASHA1, and so on.
Ignore SEP flag (i.e. make DS records for any key)
Write the result DS Resource Record to stdout instead of a file
Use SHA1 as the hash function.
Use SHA256 as the hash function
Use GOST as the hash function
Use SHA384 as the hash function
Written by the ldns team as an example for ldns usage.
Report bugs to <email@example.com>.
Copyright (C) 2005 NLnet Labs. This is free software. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.