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NAME | SYNOPSIS | ARGUMENTS | DESCRIPTION | NOTE | RETURNS | REPORTING BUGS | COPYRIGHT | SEE ALSO | COLOPHON |
gnutls_prf(3) gnutls gnutls_prf(3)
gnutls_prf - API function
#include <gnutls/gnutls.h>
int gnutls_prf(gnutls_session_t session, size_t label_size, const
char * label, int server_random_first, size_t extra_size, const char
* extra, size_t outsize, char * out);
gnutls_session_t session
is a gnutls_session_t type.
size_t label_size
length of the label variable.
const char * label
label used in PRF computation, typically a short string.
int server_random_first
non-zero if server random field should be first in seed
size_t extra_size
length of the extra variable.
const char * extra
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.
Applies the TLS Pseudo-Random-Function (PRF) on the master secret and
the provided data, seeded with the client and server random fields.
For the key expansion specified in RFC5705 see gnutls_prf_rfc5705().
The label variable usually contains a string denoting the purpose
for the generated data. The server_random_first indicates whether
the client random field or the server random field should be first in
the seed. Non-zero indicates that the server random field is first,
0 that the client random field is first.
The extra variable can be used to add more data to the seed, after
the random variables. It can be used to make sure the generated
output is strongly connected to some additional data (e.g., a string
used in user authentication).
The output is placed in out , which must be pre-allocated.
This function produces identical output with gnutls_prf_rfc5705()
when server_random_first is set to 0 and extra is NULL.
GNUTLS_E_SUCCESS on success, or an error code.
Report bugs to <bugs@gnutls.org>.
Home page: http://www.gnutls.org
Copyright © 2001-2017 Free Software Foundation, Inc., and others.
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gnutls 3.5.9 gnutls_prf(3)