static int gen_dhe_server_kx (gnutls_session_t session, opaque ** data) { bigint_t g, p; const bigint_t *mpis; int ret = 0, data_size; gnutls_cert *apr_cert_list; gnutls_privkey_t apr_pkey; int apr_cert_list_length; gnutls_datum_t signature = { NULL, 0 }, ddata; gnutls_certificate_credentials_t cred; gnutls_dh_params_t dh_params; gnutls_sign_algorithm_t sign_algo; gnutls_protocol_t ver = gnutls_protocol_get_version (session); cred = (gnutls_certificate_credentials_t) _gnutls_get_cred (session->key, GNUTLS_CRD_CERTIFICATE, NULL); if (cred == NULL) { gnutls_assert (); return GNUTLS_E_INSUFFICIENT_CREDENTIALS; } /* find the appropriate certificate */ if ((ret = _gnutls_get_selected_cert (session, &apr_cert_list, &apr_cert_list_length, &apr_pkey)) < 0) { gnutls_assert (); return ret; } 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_CERTIFICATE, sizeof (cert_auth_info_st), 0)) < 0) { gnutls_assert (); return ret; } _gnutls_dh_set_group (session, g, p); ret = _gnutls_dh_common_print_server_kx (session, g, p, data, 0); if (ret < 0) { gnutls_assert (); return ret; } data_size = ret; /* Generate the signature. */ ddata.data = *data; ddata.size = data_size; if (apr_cert_list_length > 0) { if ((ret = _gnutls_handshake_sign_data (session, &apr_cert_list[0], apr_pkey, &ddata, &signature, &sign_algo)) < 0) { gnutls_assert (); goto cleanup; } } else { gnutls_assert (); ret = data_size; /* do not put a signature - ILLEGAL! */ goto cleanup; } *data = gnutls_realloc_fast (*data, data_size + signature.size + 4); if (*data == NULL) { gnutls_assert (); ret = GNUTLS_E_MEMORY_ERROR; goto cleanup; } if (_gnutls_version_has_selectable_sighash (ver)) { const sign_algorithm_st *aid; if (sign_algo == GNUTLS_SIGN_UNKNOWN) { ret = GNUTLS_E_UNKNOWN_ALGORITHM; goto cleanup; } aid = _gnutls_sign_to_tls_aid (sign_algo); if (aid == NULL) { gnutls_assert(); ret = GNUTLS_E_UNKNOWN_ALGORITHM; goto cleanup; } (*data)[data_size++] = aid->hash_algorithm; (*data)[data_size++] = aid->sign_algorithm; } _gnutls_write_datum16 (&(*data)[data_size], signature); data_size += signature.size + 2; _gnutls_free_datum (&signature); return data_size; cleanup: _gnutls_free_datum (&signature); gnutls_free(*data); return ret; }
static int gen_rsa_export_server_kx (gnutls_session_t session, gnutls_buffer_st* data) { gnutls_rsa_params_t rsa_params; const bigint_t *rsa_mpis; int ret = 0; gnutls_pcert_st *apr_cert_list; gnutls_privkey_t apr_pkey; int apr_cert_list_length; gnutls_datum_t signature, ddata; gnutls_certificate_credentials_t cred; gnutls_sign_algorithm_t sign_algo; unsigned int bits = 0; cred = (gnutls_certificate_credentials_t) _gnutls_get_cred (session->key, GNUTLS_CRD_CERTIFICATE, NULL); if (cred == NULL) { gnutls_assert (); return GNUTLS_E_INSUFFICIENT_CREDENTIALS; } /* find the appropriate certificate */ if ((ret = _gnutls_get_selected_cert (session, &apr_cert_list, &apr_cert_list_length, &apr_pkey)) < 0) { gnutls_assert (); return ret; } /* abort sending this message if we have a certificate * of 512 bits or less. */ gnutls_privkey_get_pk_algorithm (apr_pkey, &bits); if (apr_pkey && bits <= 512) { gnutls_assert (); return GNUTLS_E_INT_RET_0; } rsa_params = _gnutls_certificate_get_rsa_params (cred->rsa_params, cred->params_func, session); rsa_mpis = _gnutls_rsa_params_to_mpi (rsa_params); if (rsa_mpis == NULL) { gnutls_assert (); return GNUTLS_E_NO_TEMPORARY_RSA_PARAMS; } if ((ret = _gnutls_auth_info_set (session, GNUTLS_CRD_CERTIFICATE, sizeof (cert_auth_info_st), 0)) < 0) { gnutls_assert (); return ret; } _gnutls_rsa_export_set_pubkey (session, rsa_mpis[1], rsa_mpis[0]); ret = _gnutls_buffer_append_mpi( data, 16, rsa_mpis[0], 0); if (ret < 0) return gnutls_assert_val(ret); ret = _gnutls_buffer_append_mpi( data, 16, rsa_mpis[1], 0); if (ret < 0) return gnutls_assert_val(ret); /* Generate the signature. */ ddata.data = data->data; ddata.size = data->length; if (apr_cert_list_length > 0) { if ((ret = _gnutls_handshake_sign_data (session, &apr_cert_list[0], apr_pkey, &ddata, &signature, &sign_algo)) < 0) { gnutls_assert (); return ret; } } else { gnutls_assert (); return data->length; /* do not put a signature - ILLEGAL! */ } ret = _gnutls_buffer_append_data_prefix( data, 16, signature.data, signature.size); _gnutls_free_datum (&signature); if (ret < 0) return gnutls_assert_val(ret); return data->length; }
static int gen_srp_cert_server_kx (gnutls_session_t session, opaque ** data) { ssize_t ret, data_size; gnutls_datum_t signature, ddata; gnutls_certificate_credentials_t cred; gnutls_cert *apr_cert_list; gnutls_privkey_t apr_pkey; int apr_cert_list_length; gnutls_sign_algorithm_t sign_algo; ret = _gnutls_gen_srp_server_kx (session, data); if (ret < 0) return ret; data_size = ret; ddata.data = *data; ddata.size = data_size; cred = (gnutls_certificate_credentials_t) _gnutls_get_cred (session->key, GNUTLS_CRD_CERTIFICATE, NULL); if (cred == NULL) { gnutls_assert (); return GNUTLS_E_INSUFFICIENT_CREDENTIALS; } /* find the appropriate certificate */ if ((ret = _gnutls_get_selected_cert (session, &apr_cert_list, &apr_cert_list_length, &apr_pkey)) < 0) { gnutls_assert (); return ret; } if ((ret = _gnutls_handshake_sign_data (session, &apr_cert_list[0], apr_pkey, &ddata, &signature, &sign_algo)) < 0) { gnutls_assert (); gnutls_free (*data); return ret; } *data = gnutls_realloc_fast (*data, data_size + signature.size + 2); if (*data == NULL) { _gnutls_free_datum (&signature); gnutls_assert (); return GNUTLS_E_MEMORY_ERROR; } _gnutls_write_datum16 (&(*data)[data_size], signature); data_size += signature.size + 2; _gnutls_free_datum (&signature); return data_size; }
static int gen_srp_cert_server_kx(gnutls_session_t session, gnutls_buffer_st * data) { ssize_t ret; gnutls_datum_t signature, ddata; gnutls_certificate_credentials_t cred; gnutls_pcert_st *apr_cert_list; gnutls_privkey_t apr_pkey; int apr_cert_list_length; gnutls_sign_algorithm_t sign_algo; const version_entry_st *ver = get_version(session); if (unlikely(ver == NULL)) return gnutls_assert_val(GNUTLS_E_INTERNAL_ERROR); ret = _gnutls_gen_srp_server_kx(session, data); if (ret < 0) return ret; ddata.data = data->data; ddata.size = data->length; cred = (gnutls_certificate_credentials_t) _gnutls_get_cred(session, GNUTLS_CRD_CERTIFICATE); if (cred == NULL) { gnutls_assert(); return GNUTLS_E_INSUFFICIENT_CREDENTIALS; } /* find the appropriate certificate */ if ((ret = _gnutls_get_selected_cert(session, &apr_cert_list, &apr_cert_list_length, &apr_pkey)) < 0) { gnutls_assert(); return ret; } if ((ret = _gnutls_handshake_sign_data(session, &apr_cert_list[0], apr_pkey, &ddata, &signature, &sign_algo)) < 0) { gnutls_assert(); return ret; } if (_gnutls_version_has_selectable_sighash(ver)) { const sign_algorithm_st *aid; uint8_t p[2]; if (sign_algo == GNUTLS_SIGN_UNKNOWN) { ret = GNUTLS_E_UNKNOWN_ALGORITHM; goto cleanup; } aid = _gnutls_sign_to_tls_aid(sign_algo); if (aid == NULL) { gnutls_assert(); ret = GNUTLS_E_UNKNOWN_ALGORITHM; goto cleanup; } p[0] = aid->hash_algorithm; p[1] = aid->sign_algorithm; ret = _gnutls_buffer_append_data(data, p, 2); if (ret < 0) { gnutls_assert(); goto cleanup; } } ret = _gnutls_buffer_append_data_prefix(data, 16, signature.data, signature.size); if (ret < 0) { gnutls_assert(); goto cleanup; } ret = data->length; cleanup: _gnutls_free_datum(&signature); return ret; }
static int gen_dhe_server_kx (gnutls_session_t session, gnutls_buffer_st* data) { bigint_t g, p; const bigint_t *mpis; int ret = 0, data_size; gnutls_pcert_st *apr_cert_list; gnutls_privkey_t apr_pkey; int apr_cert_list_length; gnutls_datum_t signature = { NULL, 0 }, ddata; gnutls_certificate_credentials_t cred; gnutls_dh_params_t dh_params; gnutls_sign_algorithm_t sign_algo; gnutls_protocol_t ver = gnutls_protocol_get_version (session); cred = (gnutls_certificate_credentials_t) _gnutls_get_cred (session->key, GNUTLS_CRD_CERTIFICATE, NULL); if (cred == NULL) { gnutls_assert (); return GNUTLS_E_INSUFFICIENT_CREDENTIALS; } /* find the appropriate certificate */ if ((ret = _gnutls_get_selected_cert (session, &apr_cert_list, &apr_cert_list_length, &apr_pkey)) < 0) { gnutls_assert (); return ret; } if ((ret = _gnutls_auth_info_set (session, GNUTLS_CRD_CERTIFICATE, sizeof (cert_auth_info_st), 0)) < 0) { gnutls_assert (); return ret; } if (!_gnutls_session_is_ecc (session)) { 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]; _gnutls_dh_set_group (session, g, p); ret = _gnutls_dh_common_print_server_kx (session, g, p, dh_params->q_bits, data); } else { ret = _gnutls_ecdh_common_print_server_kx (session, data, _gnutls_session_ecc_curve_get(session)); } if (ret < 0) { gnutls_assert (); return ret; } data_size = ret; /* Generate the signature. */ ddata.data = data->data; ddata.size = data->length; if (apr_cert_list_length > 0) { if ((ret = _gnutls_handshake_sign_data (session, &apr_cert_list[0], apr_pkey, &ddata, &signature, &sign_algo)) < 0) { gnutls_assert (); goto cleanup; } } else { gnutls_assert (); ret = data_size; /* do not put a signature - ILLEGAL! */ goto cleanup; } if (_gnutls_version_has_selectable_sighash (ver)) { const sign_algorithm_st *aid; uint8_t p[2]; if (sign_algo == GNUTLS_SIGN_UNKNOWN) { ret = GNUTLS_E_UNKNOWN_ALGORITHM; goto cleanup; } aid = _gnutls_sign_to_tls_aid (sign_algo); if (aid == NULL) { gnutls_assert(); ret = GNUTLS_E_UNKNOWN_ALGORITHM; goto cleanup; } p[0] = aid->hash_algorithm; p[1] = aid->sign_algorithm; ret = _gnutls_buffer_append_data(data, p, 2); if (ret < 0) { gnutls_assert(); goto cleanup; } } ret = _gnutls_buffer_append_data_prefix(data, 16, signature.data, signature.size); if (ret < 0) { gnutls_assert(); } ret = data->length; cleanup: _gnutls_free_datum (&signature); return ret; }