shishi_n_fold - API function

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

       const char * in
                   input array with data to decrypt.

       size_t inlen
                   size of input array with data to decrypt ("M").

       char * out  output array with decrypted data.

       size_t outlen
                   size of output array ("N").

       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.

       Fold  data  into  a fixed length output array, with the intent to give each input bit approximately equal
       weight in determining the value of each output bit.

       The algorithm is from "A Better Key Schedule For DES-like  Ciphers"  by  Uri  Blumenthal  and  Steven  M.
       Bellovin,  http://www.research.att.com/~smb/papers/ides.pdf,  although the sample vectors provided by the
       paper are incorrect.

       shishi_n_fold - 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_n_fold(3)

#include<shishi.h>intshishi_n_fold(Shishi*handle,constchar*in,size_tinlen,char*out,size_toutlen);