NAME

       shishi_dr - API function

SYNOPSIS

       #include <shishi.h>

       int  shishi_dr(Shishi  *  handle,  Shishi_key  *  key,  const  char  * prfconstant, size_t
       prfconstantlen, char * derivedrandom, size_t derivedrandomlen);

ARGUMENTS

       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.

DESCRIPTION

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

RETURN VALUE

       Returns SHISHI_OK iff successful.

REPORTING BUGS

       Report bugs to <bug-shishi@gnu.org>.

COPYRIGHT

       Copyright © 2002-2010 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.

SEE ALSO

       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

              info shishi

       should give you access to the complete manual.