gnutls_prf (3) - Linux Man Pages
gnutls_prf: API function
NAMEgnutls_prf - API function
- 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.
DESCRIPTIONApplies the TLS Pseudo-Random-Function (PRF) on the master secret and the provided data, seeded with the client and server random fields.
The output of this function is identical to RFC5705 extractor if extra and extra_size are set to zero. Otherwise, extra should contain the context value prefixed by a two-byte length.
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).
RETURNSGNUTLS_E_SUCCESS on success, or an error code.
REPORTING BUGSReport bugs to <bugs [at] gnutls.org>.
Home page: http://www.gnutls.org
COPYRIGHTCopyright © 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 ALSOThe full documentation for gnutls is maintained as a Texinfo manual. If the /usr/share/doc/gnutls/ directory does not contain the HTML form visit