int
_gnutls_server_restore_session(gnutls_session_t session,
uint8_t * session_id, int session_id_size)
{
gnutls_datum_t data;
gnutls_datum_t key;
int ret;
if (session_id == NULL || session_id_size == 0) {
gnutls_assert();
return GNUTLS_E_INVALID_REQUEST;
}
if (session->internals.premaster_set != 0) { /* hack for CISCO's DTLS-0.9 */
if (session_id_size ==
session->internals.resumed_security_parameters.
session_id_size
&& memcmp(session_id,
session->internals.
resumed_security_parameters.session_id,
session_id_size) == 0)
return 0;
}
key.data = session_id;
key.size = session_id_size;
if (db_func_is_ok(session) != 0) {
gnutls_assert();
return GNUTLS_E_INVALID_SESSION;
}
data =
session->internals.db_retrieve_func(session->internals.db_ptr,
key);
if (data.data == NULL) {
gnutls_assert();
return GNUTLS_E_INVALID_SESSION;
}
/* expiration check is performed inside */
ret = gnutls_session_set_data(session, data.data, data.size);
gnutls_free(data.data);
if (ret < 0) {
gnutls_assert();
return ret;
}
ret = _gnutls_check_resumed_params(session);
if (ret < 0)
return gnutls_assert_val(ret);
return 0;
}
/* Stores session data to the db backend.
*/
static int
store_session(gnutls_session_t session,
gnutls_datum_t session_id, gnutls_datum_t session_data)
{
int ret = 0;
if (db_func_is_ok(session) != 0) {
return GNUTLS_E_DB_ERROR;
}
if (session_data.data == NULL || session_data.size == 0) {
gnutls_assert();
return GNUTLS_E_INVALID_SESSION;
}
/* if we can't read why bother writing? */
ret = session->internals.db_store_func(session->internals.db_ptr,
session_id, session_data);
return (ret == 0 ? ret : GNUTLS_E_DB_ERROR);
}