shishi_dr - API function

       Shishi * handle
                   shishi handle as allocated by shishi_init().

       Shishi_key * key
                   input array with cryptographic key to use.

       const char * prfconstant
                   input array with the constant string.

       size_t prfconstantlen
                   size of input array with the constant string.

       char * derivedrandom
                   output array with derived random data.

       size_t derivedrandomlen
                   size of output array with derived random data.

       Copyright © 2002-2022 Simon Josefsson.
       Copying and distribution of this file, with or without modification, are permitted in any medium  without
       royalty provided the copyright notice and this notice are preserved.

       Derive "random" data from a key and a constant thusly: DR(KEY, PRFCONSTANT) =  TRUNCATE(DERIVEDRANDOMLEN,
       SHISHI_ENCRYPT(KEY, PRFCONSTANT)).

       shishi_dr - API function

       Report  bugs  to <bug-shishi@gnu.org>.  GNU Shishi home page: http://www.gnu.org/software/shishi/ General
       help using GNU software: http://www.gnu.org/gethelp/

       Returns SHISHI_OK iff successful.

       The full documentation for shishi is maintained as a Texinfo manual.  If the info and shishi programs are
       properly installed at your site, the command

              infoshishi

       should give you access to the complete manual.

shishi                                                1.0.3                                         shishi_dr(3)

#include<shishi.h>intshishi_dr(Shishi*handle,Shishi_key*key,constchar*prfconstant,size_tprfconstantlen,char*derivedrandom,size_tderivedrandomlen);