441 lines
12 KiB
C
441 lines
12 KiB
C
/*
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* Copyright (C) 2011-2012 Andreas Steffen
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* HSR Hochschule fuer Technik Rapperswil
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*/
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#include "imc_test_state.h"
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#include <imc/imc_agent.h>
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#include <pa_tnc/pa_tnc_msg.h>
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#include <ietf/ietf_attr.h>
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#include <ietf/ietf_attr_pa_tnc_error.h>
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#include <ietf/ietf_attr_assess_result.h>
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#include <ita/ita_attr.h>
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#include <ita/ita_attr_command.h>
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#include <ita/ita_attr_dummy.h>
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#include <tncif_pa_subtypes.h>
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#include <pen/pen.h>
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#include <debug.h>
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/* IMC definitions */
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static const char imc_name[] = "Test";
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#define IMC_VENDOR_ID PEN_ITA
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#define IMC_SUBTYPE PA_SUBTYPE_ITA_TEST
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static imc_agent_t *imc_test;
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/**
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* see section 3.8.1 of TCG TNC IF-IMC Specification 1.3
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*/
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TNC_Result TNC_IMC_Initialize(TNC_IMCID imc_id,
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TNC_Version min_version,
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TNC_Version max_version,
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TNC_Version *actual_version)
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{
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if (imc_test)
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{
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DBG1(DBG_IMC, "IMC \"%s\" has already been initialized", imc_name);
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return TNC_RESULT_ALREADY_INITIALIZED;
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}
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imc_test = imc_agent_create(imc_name, IMC_VENDOR_ID, IMC_SUBTYPE,
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imc_id, actual_version);
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if (!imc_test)
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{
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return TNC_RESULT_FATAL;
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}
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if (min_version > TNC_IFIMC_VERSION_1 || max_version < TNC_IFIMC_VERSION_1)
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{
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DBG1(DBG_IMC, "no common IF-IMC version");
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return TNC_RESULT_NO_COMMON_VERSION;
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}
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return TNC_RESULT_SUCCESS;
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}
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/**
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* see section 3.8.2 of TCG TNC IF-IMC Specification 1.3
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*/
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TNC_Result TNC_IMC_NotifyConnectionChange(TNC_IMCID imc_id,
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TNC_ConnectionID connection_id,
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TNC_ConnectionState new_state)
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{
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imc_state_t *state;
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imc_test_state_t *test_state;
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TNC_Result result;
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TNC_UInt32 additional_id;
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char *command;
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bool retry;
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void *pointer;
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enumerator_t *enumerator;
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int dummy_size, additional_ids;
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if (!imc_test)
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{
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DBG1(DBG_IMC, "IMC \"%s\" has not been initialized", imc_name);
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return TNC_RESULT_NOT_INITIALIZED;
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}
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switch (new_state)
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{
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case TNC_CONNECTION_STATE_CREATE:
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command = lib->settings->get_str(lib->settings,
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"libimcv.plugins.imc-test.command", "none");
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dummy_size = lib->settings->get_int(lib->settings,
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"libimcv.plugins.imc-test.dummy_size", 0);
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retry = lib->settings->get_bool(lib->settings,
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"libimcv.plugins.imc-test.retry", FALSE);
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state = imc_test_state_create(connection_id, command, dummy_size,
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retry);
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result = imc_test->create_state(imc_test, state);
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if (result != TNC_RESULT_SUCCESS)
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{
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return result;
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}
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/* Optionally reserve additional IMC IDs */
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additional_ids = lib->settings->get_int(lib->settings,
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"libimcv.plugins.imc-test.additional_ids", 0);
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imc_test->reserve_additional_ids(imc_test, additional_ids -
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imc_test->count_additional_ids(imc_test));
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return TNC_RESULT_SUCCESS;
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case TNC_CONNECTION_STATE_HANDSHAKE:
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/* get updated IMC state */
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result = imc_test->change_state(imc_test, connection_id,
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new_state, &state);
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if (result != TNC_RESULT_SUCCESS)
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{
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return TNC_RESULT_FATAL;
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}
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test_state = (imc_test_state_t*)state;
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/* is it the first handshake or a retry ? */
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if (!test_state->is_first_handshake(test_state))
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{
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command = lib->settings->get_str(lib->settings,
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"libimcv.plugins.imc-test.retry_command",
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test_state->get_command(test_state));
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test_state->set_command(test_state, command);
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}
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state->set_result(state, imc_id, TNC_IMV_EVALUATION_RESULT_DONT_KNOW);
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/* Exit if there are no additional IMC IDs */
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if (!imc_test->count_additional_ids(imc_test))
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{
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return result;
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}
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enumerator = imc_test->create_id_enumerator(imc_test);
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while (enumerator->enumerate(enumerator, &pointer))
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{
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/* interpret pointer as scalar value */
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additional_id = (TNC_UInt32)pointer;
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state->set_result(state, additional_id,
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TNC_IMV_EVALUATION_RESULT_DONT_KNOW);
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}
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enumerator->destroy(enumerator);
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return TNC_RESULT_SUCCESS;
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case TNC_CONNECTION_STATE_DELETE:
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return imc_test->delete_state(imc_test, connection_id);
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case TNC_CONNECTION_STATE_ACCESS_ISOLATED:
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case TNC_CONNECTION_STATE_ACCESS_NONE:
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/* get updated IMC state */
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result = imc_test->change_state(imc_test, connection_id,
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new_state, &state);
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if (result != TNC_RESULT_SUCCESS)
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{
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return TNC_RESULT_FATAL;
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}
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test_state = (imc_test_state_t*)state;
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/* do a handshake retry? */
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if (test_state->do_handshake_retry(test_state))
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{
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return imc_test->request_handshake_retry(imc_id, connection_id,
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TNC_RETRY_REASON_IMC_REMEDIATION_COMPLETE);
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}
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return TNC_RESULT_SUCCESS;
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default:
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return imc_test->change_state(imc_test, connection_id,
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new_state, NULL);
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}
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}
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static TNC_Result send_message(imc_state_t *state, TNC_UInt32 src_imc_id,
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TNC_UInt32 dst_imv_id)
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{
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imc_test_state_t *test_state;
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linked_list_t *attr_list;
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pa_tnc_attr_t *attr;
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bool excl;
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TNC_ConnectionID connection_id;
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TNC_Result result;
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attr_list = linked_list_create();
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connection_id = state->get_connection_id(state);
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test_state = (imc_test_state_t*)state;
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if (test_state->get_dummy_size(test_state))
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{
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attr = ita_attr_dummy_create(test_state->get_dummy_size(test_state));
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attr->set_noskip_flag(attr, TRUE);
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attr_list->insert_last(attr_list, attr);
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}
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attr = ita_attr_command_create(test_state->get_command(test_state));
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attr->set_noskip_flag(attr, TRUE);
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attr_list->insert_last(attr_list, attr);
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excl = dst_imv_id != TNC_IMVID_ANY;
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result = imc_test->send_message(imc_test, connection_id, excl, src_imc_id,
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dst_imv_id, attr_list);
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attr_list->destroy(attr_list);
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return result;
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}
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/**
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* see section 3.8.3 of TCG TNC IF-IMC Specification 1.3
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*/
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TNC_Result TNC_IMC_BeginHandshake(TNC_IMCID imc_id,
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TNC_ConnectionID connection_id)
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{
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imc_state_t *state;
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enumerator_t *enumerator;
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void *pointer;
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TNC_UInt32 additional_id;
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TNC_Result result;
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if (!imc_test)
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{
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DBG1(DBG_IMC, "IMC \"%s\" has not been initialized", imc_name);
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return TNC_RESULT_NOT_INITIALIZED;
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}
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/* get current IMC state */
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if (!imc_test->get_state(imc_test, connection_id, &state))
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{
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return TNC_RESULT_FATAL;
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}
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/* send PA message for primary IMC ID */
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result = send_message(state, imc_id, TNC_IMVID_ANY);
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/* Exit if there are no additional IMC IDs */
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if (!imc_test->count_additional_ids(imc_test))
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{
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return result;
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}
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/* Do we have support for transporting multiple IMC IDs? */
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if (!state->has_long(state))
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{
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DBG1(DBG_IMC, "IMC %u \"%s\" did not detect support for transporting "
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"multiple IMC IDs", imc_id, imc_name);
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return result;
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}
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/* send PA messages for additional IMC IDs */
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enumerator = imc_test->create_id_enumerator(imc_test);
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while (result == TNC_RESULT_SUCCESS &&
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enumerator->enumerate(enumerator, &pointer))
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{
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/* interpret pointer as scalar value */
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additional_id = (TNC_UInt32)pointer;
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result = send_message(state, additional_id, TNC_IMVID_ANY);
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}
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enumerator->destroy(enumerator);
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return result;
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}
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static TNC_Result receive_message(TNC_IMCID imc_id,
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TNC_ConnectionID connection_id,
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TNC_UInt32 msg_flags,
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chunk_t msg,
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TNC_VendorID msg_vid,
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TNC_MessageSubtype msg_subtype,
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TNC_UInt32 src_imv_id,
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TNC_UInt32 dst_imc_id)
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{
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pa_tnc_msg_t *pa_tnc_msg;
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pa_tnc_attr_t *attr;
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pen_type_t attr_type;
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imc_state_t *state;
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enumerator_t *enumerator;
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TNC_Result result;
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bool fatal_error = FALSE;
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if (!imc_test)
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{
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DBG1(DBG_IMC, "IMC \"%s\" has not been initialized", imc_name);
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return TNC_RESULT_NOT_INITIALIZED;
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}
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/* get current IMC state */
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if (!imc_test->get_state(imc_test, connection_id, &state))
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{
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return TNC_RESULT_FATAL;
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}
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/* parse received PA-TNC message and automatically handle any errors */
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result = imc_test->receive_message(imc_test, state, msg, msg_vid,
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msg_subtype, src_imv_id, dst_imc_id, &pa_tnc_msg);
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/* no parsed PA-TNC attributes available if an error occurred */
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if (!pa_tnc_msg)
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{
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return result;
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}
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/* preprocess any IETF standard error attributes */
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fatal_error = pa_tnc_msg->process_ietf_std_errors(pa_tnc_msg);
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/* analyze PA-TNC attributes */
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enumerator = pa_tnc_msg->create_attribute_enumerator(pa_tnc_msg);
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while (enumerator->enumerate(enumerator, &attr))
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{
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attr_type = attr->get_type(attr);
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if (attr_type.vendor_id == PEN_IETF)
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{
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ietf_attr_assess_result_t *ietf_attr;
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ietf_attr = (ietf_attr_assess_result_t*)attr;
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state->set_result(state, dst_imc_id,
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ietf_attr->get_result(ietf_attr));
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}
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else if (attr_type.vendor_id == PEN_ITA)
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{
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if (attr_type.type == ITA_ATTR_COMMAND)
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{
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ita_attr_command_t *ita_attr;
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ita_attr = (ita_attr_command_t*)attr;
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DBG1(DBG_IMC, "received command '%s'",
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ita_attr->get_command(ita_attr));
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}
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else if (attr_type.type == ITA_ATTR_DUMMY)
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{
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ita_attr_dummy_t *ita_attr;
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ita_attr = (ita_attr_dummy_t*)attr;
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DBG1(DBG_IMC, "received dummy attribute value (%d bytes)",
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ita_attr->get_size(ita_attr));
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}
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}
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}
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enumerator->destroy(enumerator);
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pa_tnc_msg->destroy(pa_tnc_msg);
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if (fatal_error)
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{
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return TNC_RESULT_FATAL;
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}
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/* if no assessment result is known then repeat the measurement */
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return state->get_result(state, dst_imc_id, NULL) ?
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TNC_RESULT_SUCCESS : send_message(state, dst_imc_id, src_imv_id);
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}
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/**
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* see section 3.8.4 of TCG TNC IF-IMC Specification 1.3
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*/
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TNC_Result TNC_IMC_ReceiveMessage(TNC_IMCID imc_id,
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TNC_ConnectionID connection_id,
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TNC_BufferReference msg,
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TNC_UInt32 msg_len,
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TNC_MessageType msg_type)
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{
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TNC_VendorID msg_vid;
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TNC_MessageSubtype msg_subtype;
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msg_vid = msg_type >> 8;
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msg_subtype = msg_type & TNC_SUBTYPE_ANY;
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return receive_message(imc_id, connection_id, 0, chunk_create(msg, msg_len),
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msg_vid, msg_subtype, 0, TNC_IMCID_ANY);
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}
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/**
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* see section 3.8.6 of TCG TNC IF-IMV Specification 1.3
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*/
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TNC_Result TNC_IMC_ReceiveMessageLong(TNC_IMCID imc_id,
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TNC_ConnectionID connection_id,
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TNC_UInt32 msg_flags,
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TNC_BufferReference msg,
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TNC_UInt32 msg_len,
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TNC_VendorID msg_vid,
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TNC_MessageSubtype msg_subtype,
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TNC_UInt32 src_imv_id,
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TNC_UInt32 dst_imc_id)
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{
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return receive_message(imc_id, connection_id, msg_flags,
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chunk_create(msg, msg_len), msg_vid, msg_subtype,
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src_imv_id, dst_imc_id);
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}
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/**
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* see section 3.8.7 of TCG TNC IF-IMC Specification 1.3
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*/
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TNC_Result TNC_IMC_BatchEnding(TNC_IMCID imc_id,
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TNC_ConnectionID connection_id)
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{
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if (!imc_test)
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{
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DBG1(DBG_IMC, "IMC \"%s\" has not been initialized", imc_name);
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return TNC_RESULT_NOT_INITIALIZED;
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}
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return TNC_RESULT_SUCCESS;
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}
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/**
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* see section 3.8.8 of TCG TNC IF-IMC Specification 1.3
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*/
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TNC_Result TNC_IMC_Terminate(TNC_IMCID imc_id)
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{
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if (!imc_test)
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{
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DBG1(DBG_IMC, "IMC \"%s\" has not been initialized", imc_name);
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return TNC_RESULT_NOT_INITIALIZED;
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}
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imc_test->destroy(imc_test);
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imc_test = NULL;
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return TNC_RESULT_SUCCESS;
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}
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/**
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* see section 4.2.8.1 of TCG TNC IF-IMC Specification 1.3
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*/
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TNC_Result TNC_IMC_ProvideBindFunction(TNC_IMCID imc_id,
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TNC_TNCC_BindFunctionPointer bind_function)
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{
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if (!imc_test)
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{
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DBG1(DBG_IMC, "IMC \"%s\" has not been initialized", imc_name);
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return TNC_RESULT_NOT_INITIALIZED;
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}
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return imc_test->bind_functions(imc_test, bind_function);
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}
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