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author | Nikos Mavrogiannopoulos <nmav@gnutls.org> | 2005-11-15 17:35:02 +0000 |
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committer | Nikos Mavrogiannopoulos <nmav@gnutls.org> | 2005-11-15 17:35:02 +0000 |
commit | 28742fa959f05142f2659f73a5ea1260175179a7 (patch) | |
tree | b29435e31924e409e58bf034cf30092e5e39cf2e /lib/auth_dhe_psk.c | |
parent | dea22989089a7c2de01a606a9e6ed60caee2742f (diff) | |
download | gnutls-28742fa959f05142f2659f73a5ea1260175179a7.tar.gz |
added DHE-PSK ciphersuites and some cleanups.
Diffstat (limited to 'lib/auth_dhe_psk.c')
-rw-r--r-- | lib/auth_dhe_psk.c | 176 |
1 files changed, 176 insertions, 0 deletions
diff --git a/lib/auth_dhe_psk.c b/lib/auth_dhe_psk.c new file mode 100644 index 0000000000..772ac86edb --- /dev/null +++ b/lib/auth_dhe_psk.c @@ -0,0 +1,176 @@ +/* + * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, + * 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_PSK + +#include "gnutls_auth_int.h" +#include "gnutls_errors.h" +#include "gnutls_dh.h" +#include "auth_psk.h" +#include "gnutls_num.h" +#include "gnutls_mpi.h" +#include <gnutls_state.h> +#include <auth_dh_common.h> + +static int gen_psk_server_kx (gnutls_session_t, opaque **); +static int proc_psk_client_kx (gnutls_session_t, opaque *, size_t); +static int proc_psk_server_kx (gnutls_session_t, opaque *, size_t); + +const mod_auth_st dhe_psk_auth_struct = { + "DHE PSK", + NULL, + NULL, + gen_psk_server_kx, + _gnutls_gen_dh_common_client_kx, /* this can be shared */ + NULL, + NULL, + + NULL, + NULL, /* certificate */ + proc_psk_server_kx, + proc_psk_client_kx, + NULL, + NULL +}; + +static int +gen_psk_server_kx (gnutls_session_t session, opaque ** data) +{ + mpi_t g, p; + const mpi_t *mpis; + int ret; + gnutls_dh_params_t dh_params; + gnutls_psk_server_credentials_t cred; + + cred = (gnutls_psk_server_credentials_t) + _gnutls_get_cred (session->key, GNUTLS_CRD_PSK, NULL); + if (cred == NULL) + { + gnutls_assert (); + return GNUTLS_E_INSUFFICIENT_CREDENTIALS; + } + + dh_params = _gnutls_get_dh_params (cred->dh_params, cred->params_func, session); + mpis = _gnutls_dh_params_to_mpi (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_PSK, + sizeof (psk_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_psk_client_kx (gnutls_session_t session, opaque * data, + size_t _data_size) +{ + gnutls_psk_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_psk_server_credentials_t) + _gnutls_get_cred (session->key, GNUTLS_CRD_PSK, NULL); + if (cred == NULL) + { + gnutls_assert (); + return GNUTLS_E_INSUFFICIENT_CREDENTIALS; + } + + dh_params = _gnutls_get_dh_params (cred->dh_params, cred->params_func, session); + mpis = _gnutls_dh_params_to_mpi (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_psk_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_PSK, + sizeof (psk_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_PSK */ |