gnutls_prf_raw(3)		    gnutls		     gnutls_prf_raw(3)



NAME
       gnutls_prf_raw - access the TLS PRF directly

SYNOPSIS
       #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);

ARGUMENTS
       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.

DESCRIPTION
       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 ses-
       sion 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 ran-
       dom fields directly, and is recommended if you want to generate	pseudo
       random data unique for each session.

RETURNS
       GNUTLS_E_SUCCESS on success, or an error code.

REPORTING BUGS
       Report	 bugs	 to    <bug-gnutls@gnu.org>.	 GnuTLS   home	 page:
       http://www.gnu.org/software/gnutls/ General help  using	GNU  software:
       http://www.gnu.org/gethelp/


COPYRIGHT
       Copyright (C) 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.

SEE ALSO
       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.



gnutls				     2.8.3		     gnutls_prf_raw(3)

NAME - SYNOPSIS - ARGUMENTS - DESCRIPTION - RETURNS - REPORTING BUGS - 
COPYRIGHT - SEE ALSO -