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gnutls_srp_set_server_credentials_function — API function
#include <gnutls/gnutls.h>
void
gnutls_srp_set_server_credentials_function( |
gnutls_srp_server_credentials_t cred, |
gnutls_srp_server_credentials_function *
func); |
is a gnutls_srp_server_credentials_t structure.
is the callback function
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.
In case the callback returned a negative number then gnutls will assume that the username does not exist.
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).
The callback function will only be called once per handshake. The callback function should return 0 on success, while −1 indicates an error.
Report bugs to <bug-gnutls@gnu.org>.
General guidelines for reporting bugs: http://www.gnu.org/gethelp/
GnuTLS home page: http://www.gnu.org/software/gnutls/
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. As an alternative you may obtain the manual from:
| COPYRIGHT |
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Copyright © 2001-2013 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. |