NAME
gnutls_prf_raw - access the TLS PRF directly
SYNOPSIS
#include <gnutls/gnutls.h>
I 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
is a gnutls_session_t structure.
"size_t
length of the label variable.
"const
label used in PRF computation, typically a short string.
"size_t
length of the seed variable.
"const
optional extra data to seed the PRF with.
"size_t
size of pre-allocated output buffer to hold the output.
"char
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
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.
RETURN VALUE
Return 0 on success, or an error code.
REPORTING BUGS
Report bugs to <bug-gnutls@gnu.org>.
COPYRIGHT
Copyright 2006 Free Software Foundation.
Permission is granted to make and distribute verbatim copies of this
manual provided the copyright notice and this permission notice are
preserved on all copies.
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.
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