gnutls_prf_raw - access the TLS PRF directly
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
is a gnutls_session_t structure.
length of the label variable.
const char * label
label used in PRF computation, typically a short string.
length of the seed variable.
const char * seed
optional extra data to seed the PRF with.
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
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 <email@example.com>. GnuTLS home page:
http://www.gnu.org/software/gnutls/ 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,
should give you access to the complete manual.