Функции API (API function)
Имя (Name)
gnutls_srp_set_server_credentials_function - API function
Синопсис (Synopsis)
#include <gnutls/gnutls.h>
void
gnutls_srp_set_server_credentials_function(gnutls_srp_server_credentials_t
cred, gnutls_srp_server_credentials_function * func);
Аргументы (Arguments)
gnutls_srp_server_credentials_t cred
is a gnutls_srp_server_credentials_t type.
gnutls_srp_server_credentials_function * func
is the callback function
Описание (Description)
This function can be used to set a callback to retrieve the
user's SRP credentials. The callback's function form is:
int (*callback)(gnutls_session_t, const char* username,
gnutls_datum_t *salt, gnutls_datum_t *verifier, gnutls_datum_t
*generator, gnutls_datum_t *prime);
username contains the actual username. The salt , verifier ,
generator and prime must be filled in using the gnutls_malloc().
For convenience prime and generator may also be one of the
static parameters defined in gnutls.h.
Initially, the data field is NULL in every gnutls_datum_t
structure that the callback has to fill in. When the callback is
done GnuTLS deallocates all of those buffers which are non-NULL,
regardless of the return value.
In order to prevent attackers from guessing valid usernames, if a
user does not exist, g and n values should be filled in using a
random user's parameters. In that case the callback must return
the special value (1). See gnutls_srp_set_server_fake_salt_seed
too. If this is not required for your application, return a
negative number from the callback to abort the handshake.
The callback function will only be called once per handshake.
The callback function should return 0 on success, while -1
indicates an error.
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/
