Функции API (API function)
Имя (Name)
gnutls_prf_rfc5705 - API function
Синопсис (Synopsis)
#include <gnutls/gnutls.h>
int gnutls_prf_rfc5705(gnutls_session_t session, size_t
label_size, const char * label, size_t context_size, const char *
context, size_t outsize, char * out);
Аргументы (Arguments)
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.
size_t context_size
length of the extra variable.
const char * context
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.
Описание (Description)
Exports keying material from TLS/DTLS session to an application,
as specified in RFC5705.
In the TLS versions prior to 1.3, it applies the TLS
Pseudo-Random-Function (PRF) on the master secret and the
provided data, seeded with the client and server random fields.
In TLS 1.3, it applies HKDF on the exporter master secret derived
from the master secret.
The label variable usually contains a string denoting the
purpose for the generated data.
The context 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.
Note that, to provide the RFC5705 context, the context variable
must be non-null.
Возвращаемое значение (Return value)
GNUTLS_E_SUCCESS on success, or an error code.
Сообщение об ошибках (Reporting bugs)
Report bugs to <bugs@gnutls.org>.
Home page: https://www.gnutls.org
Смотри также (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
https://www.gnutls.org/manual/
