Man Linux: Main Page and Category List


       gnutls_prf_raw - access the TLS PRF directly


       #include <gnutls/gnutls.h>

       int  gnutls_prf_raw(gnutls_session_t  session, size_t label_size, const
       char * label, size_t seed_size, const char * seed, size_t outsize, char
       * out);


       gnutls_session_t session
                   is a gnutls_session_t structure.

       size_t label_size
                   length of the label variable.

       const char * label
                   label used in PRF computation, typically a short string.

       size_t seed_size
                   length of the seed variable.

       const char * seed
                   optional extra data to seed the PRF with.

       size_t outsize
                   size of pre-allocated output buffer to hold the output.

       char * out  pre-allocate buffer to hold the generated data.


       Apply  the  TLS Pseudo-Random-Function (PRF) using the master secret on
       some data.

       The label variable usually contain a string denoting  the  purpose  for
       the  generated  data.  The seed usually contain data such as the client
       and server random, perhaps together with some additional data  that  is
       added to guarantee uniqueness of the output for a particular purpose.

       Because  the  output  is  not  guaranteed to be unique for a particular
       session unless seed include the client random and server random  fields
       (the  PRF would output the same data on another connection resumed from
       the first one), it is not recommended to use  this  function  directly.
       The  gnutls_prf()  function  seed  the  PRF  with the client and server
       random fields directly, and is recommended  if  you  want  to  generate
       pseudo random data unique for each session.


       GNUTLS_E_SUCCESS on success, or an error code.


       Report    bugs    to    <>.     GnuTLS   home   page: General help  using  GNU  software:


       Copyright © 2008 Free Software Foundation.
       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.


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

              info gnutls

       should give you access to the complete manual.