NAME¶
gnutls_prf - API function
SYNOPSIS¶
#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);
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.
- 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.
DESCRIPTION¶
Applies the TLS Pseudo-Random-Function (PRF) on the master secret and the
provided data, seeded with the client and server random fields, as specified
in 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.
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/
