NAME¶
gnutls_prf_raw - API function
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-allocated buffer to hold the generated data.
DESCRIPTION¶
Apply the TLS Pseudo-Random-Function (PRF) on the master secret and the provided
data.
The
label variable usually contains a string denoting the purpose for the
generated data. The
seed usually contains 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 includes 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 seeds 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.
RETURNS¶
GNUTLS_E_SUCCESS on success, or an error code.
REPORTING BUGS¶
Report bugs to <bugs@gnutls.org>.
Home page:
http://www.gnutls.org
COPYRIGHT¶
Copyright © 2001-2014 Free Software Foundation, Inc..
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 /usr/share/doc/gnutls/ directory does not contain the HTML form visit
- http://www.gnutls.org/manual/