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/*
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* Copyright (C) 2000-2012 Free Software Foundation, Inc.
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*
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* Author: Nikos Mavrogiannopoulos
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*
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* This file is part of GnuTLS.
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*
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* The GnuTLS is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public License
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* as published by the Free Software Foundation; either version 2.1 of
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* the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>
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*
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*/
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/* This file contains the Anonymous Diffie-Hellman key exchange part of
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* the anonymous authentication. The functions here are used in the
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* handshake.
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*/
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#include "gnutls_int.h"
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#if defined(ENABLE_ANON) && defined(ENABLE_ECDHE)
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#include "auth.h"
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#include "errors.h"
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#include "dh.h"
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#include "auth/anon.h"
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#include "num.h"
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#include "mpi.h"
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#include <state.h>
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#include <auth/ecdhe.h>
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#include <ext/supported_groups.h>
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static int gen_anon_ecdh_server_kx(gnutls_session_t, gnutls_buffer_st *);
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static int proc_anon_ecdh_client_kx(gnutls_session_t, uint8_t *, size_t);
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static int proc_anon_ecdh_server_kx(gnutls_session_t, uint8_t *, size_t);
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const mod_auth_st anon_ecdh_auth_struct = {
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"ANON ECDH",
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NULL,
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NULL,
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gen_anon_ecdh_server_kx,
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_gnutls_gen_ecdh_common_client_kx, /* this can be shared */
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NULL,
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NULL,
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NULL,
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NULL, /* certificate */
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proc_anon_ecdh_server_kx,
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proc_anon_ecdh_client_kx,
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NULL,
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NULL
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};
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static int
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gen_anon_ecdh_server_kx(gnutls_session_t session, gnutls_buffer_st * data)
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{
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int ret;
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gnutls_anon_server_credentials_t cred;
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cred = (gnutls_anon_server_credentials_t)
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_gnutls_get_cred(session, GNUTLS_CRD_ANON);
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if (cred == NULL) {
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gnutls_assert();
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return GNUTLS_E_INSUFFICIENT_CREDENTIALS;
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}
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if ((ret =
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_gnutls_auth_info_init(session, GNUTLS_CRD_ANON,
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sizeof(anon_auth_info_st), 1)) < 0) {
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gnutls_assert();
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return ret;
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}
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ret =
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_gnutls_ecdh_common_print_server_kx(session, data,
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get_group
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(session));
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if (ret < 0) {
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gnutls_assert();
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}
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return ret;
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}
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static int
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proc_anon_ecdh_client_kx(gnutls_session_t session, uint8_t * data,
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size_t _data_size)
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{
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gnutls_anon_server_credentials_t cred;
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cred = (gnutls_anon_server_credentials_t)
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_gnutls_get_cred(session, GNUTLS_CRD_ANON);
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if (cred == NULL) {
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gnutls_assert();
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return GNUTLS_E_INSUFFICIENT_CREDENTIALS;
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}
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return _gnutls_proc_ecdh_common_client_kx(session, data,
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_data_size,
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get_group
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(session), NULL);
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}
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int
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proc_anon_ecdh_server_kx(gnutls_session_t session, uint8_t * data,
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size_t _data_size)
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{
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int ret;
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/* set auth_info */
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if ((ret =
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_gnutls_auth_info_init(session, GNUTLS_CRD_ANON,
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sizeof(anon_auth_info_st), 1)) < 0) {
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gnutls_assert();
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return ret;
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}
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ret =
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_gnutls_proc_ecdh_common_server_kx(session, data, _data_size);
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if (ret < 0) {
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gnutls_assert();
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return ret;
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}
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return 0;
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}
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#endif /* ENABLE_ANON */
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