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gnutls_prf
Section: gnutls (3)
Updated: 2.10.2
Index
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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-0 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-allocate buffer to hold the generated data.
DESCRIPTION
Apply the TLS Pseudo-Random-Function (PRF) using the master secret
on some data, seeded with the client and server random fields.
The label variable usually contain a string denoting the purpose
for the generated data. The server_random_first indicate whether
the client random field or the server random field should be first
in the seed. Non-0 indicate 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 tie 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 <bug-gnutls@gnu.org>.
GnuTLS home page: http://www.gnu.org/software/gnutls/
General help using GNU software: http://www.gnu.org/gethelp/
COPYRIGHT
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.
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.
Index
- NAME
-
- SYNOPSIS
-
- ARGUMENTS
-
- DESCRIPTION
-
- RETURNS
-
- REPORTING BUGS
-
- COPYRIGHT
-
- SEE ALSO
-
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