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/*
* Copyright (C) 2000,2001,2002,2003 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, opaque**);
static int proc_anon_client_kx( gnutls_session, opaque*, size_t);
static int proc_anon_server_kx( gnutls_session, opaque*, size_t);
const MOD_AUTH_STRUCT 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 session, opaque** data) {
GNUTLS_MPI g, p;
const GNUTLS_MPI *mpis;
int ret;
const gnutls_anon_server_credentials cred;
cred = _gnutls_get_cred(session->key, GNUTLS_CRD_ANON, NULL);
if (cred == NULL) {
gnutls_assert();
return GNUTLS_E_INSUFFICIENT_CREDENTIALS;
}
mpis = _gnutls_get_dh_params( cred->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_INT), 1)) < 0)
{
gnutls_assert();
return ret;
}
if ((ret=_gnutls_dh_set_prime_bits( session, _gnutls_mpi_get_nbits(p))) < 0) {
gnutls_assert();
return ret;
}
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 session, opaque* data, size_t _data_size)
{
const gnutls_anon_server_credentials cred;
int bits;
int ret;
GNUTLS_MPI p, g;
const GNUTLS_MPI *mpis;
bits = _gnutls_dh_get_prime_bits( session);
cred = _gnutls_get_cred(session->key, GNUTLS_CRD_ANON, NULL);
if (cred == NULL) {
gnutls_assert();
return GNUTLS_E_INSUFFICIENT_CREDENTIALS;
}
mpis = _gnutls_get_dh_params( cred->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 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_INT), 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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