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/*
* Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005 Free Software Foundation
*
* Author: Nikos Mavroyanopoulos
*
* This file is part of GNUTLS.
*
* The GNUTLS library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
* USA
*
*/
/* This file contains the Anonymous Diffie Hellman key exchange part of
* the anonymous authentication. The functions here are used in the
* handshake.
*/
#include <gnutls_int.h>
#ifdef ENABLE_ANON
#include "gnutls_auth_int.h"
#include "gnutls_errors.h"
#include "gnutls_dh.h"
#include "auth_anon.h"
#include "gnutls_num.h"
#include "gnutls_mpi.h"
#include <gnutls_state.h>
#include <auth_dh_common.h>
static int gen_anon_server_kx(gnutls_session_t, opaque **);
static int proc_anon_client_kx(gnutls_session_t, opaque *, size_t);
static int proc_anon_server_kx(gnutls_session_t, opaque *, size_t);
const mod_auth_st anon_auth_struct = {
"ANON",
NULL,
NULL,
gen_anon_server_kx,
_gnutls_gen_dh_common_client_kx, /* this can be shared */
NULL,
NULL,
NULL,
NULL, /* certificate */
proc_anon_server_kx,
proc_anon_client_kx,
NULL,
NULL
};
static int gen_anon_server_kx(gnutls_session_t session, opaque ** data)
{
mpi_t g, p;
const mpi_t *mpis;
int ret;
gnutls_dh_params_t dh_params;
const gnutls_anon_server_credentials_t cred;
cred = _gnutls_get_cred(session->key, GNUTLS_CRD_ANON, NULL);
if (cred == NULL) {
gnutls_assert();
return GNUTLS_E_INSUFFICIENT_CREDENTIALS;
}
dh_params = _gnutls_anon_get_dh_params(cred, session);
mpis = _gnutls_get_dh_params(dh_params);
if (mpis == NULL) {
gnutls_assert();
return GNUTLS_E_NO_TEMPORARY_DH_PARAMS;
}
p = mpis[0];
g = mpis[1];
if ((ret =
_gnutls_auth_info_set(session, GNUTLS_CRD_ANON,
sizeof(anon_server_auth_info_st), 1)) < 0) {
gnutls_assert();
return ret;
}
_gnutls_dh_set_group(session, g, p);
ret = _gnutls_dh_common_print_server_kx(session, g, p, data);
if (ret < 0) {
gnutls_assert();
}
return ret;
}
static int proc_anon_client_kx(gnutls_session_t session, opaque * data,
size_t _data_size)
{
const gnutls_anon_server_credentials_t cred;
int bits;
int ret;
mpi_t p, g;
gnutls_dh_params_t dh_params;
const mpi_t *mpis;
bits = _gnutls_dh_get_allowed_prime_bits(session);
cred = _gnutls_get_cred(session->key, GNUTLS_CRD_ANON, NULL);
if (cred == NULL) {
gnutls_assert();
return GNUTLS_E_INSUFFICIENT_CREDENTIALS;
}
dh_params = _gnutls_anon_get_dh_params(cred, session);
mpis = _gnutls_get_dh_params(dh_params);
if (mpis == NULL) {
gnutls_assert();
return GNUTLS_E_NO_TEMPORARY_DH_PARAMS;
}
p = mpis[0];
g = mpis[1];
ret =
_gnutls_proc_dh_common_client_kx(session, data, _data_size, g, p);
return ret;
}
int proc_anon_server_kx(gnutls_session_t session, opaque * data,
size_t _data_size)
{
int ret;
/* set auth_info */
if ((ret =
_gnutls_auth_info_set(session, GNUTLS_CRD_ANON,
sizeof(anon_client_auth_info_st), 1)) < 0) {
gnutls_assert();
return ret;
}
ret = _gnutls_proc_dh_common_server_kx(session, data, _data_size);
if (ret < 0) {
gnutls_assert();
return ret;
}
return 0;
}
#endif /* ENABLE_ANON */
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