336 lines
8.9 KiB
C
336 lines
8.9 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 "imv_test_state.h"
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#include <imv/imv_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 <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_names.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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/* IMV definitions */
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static const char imv_name[] = "Test";
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#define IMV_VENDOR_ID PEN_ITA
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#define IMV_SUBTYPE PA_SUBTYPE_ITA_TEST
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static imv_agent_t *imv_test;
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/**
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* see section 3.8.1 of TCG TNC IF-IMV Specification 1.3
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*/
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TNC_Result TNC_IMV_Initialize(TNC_IMVID imv_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 (imv_test)
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{
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DBG1(DBG_IMV, "IMV \"%s\" has already been initialized", imv_name);
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return TNC_RESULT_ALREADY_INITIALIZED;
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}
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imv_test = imv_agent_create(imv_name, IMV_VENDOR_ID, IMV_SUBTYPE,
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imv_id, actual_version);
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if (!imv_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_IFIMV_VERSION_1 || max_version < TNC_IFIMV_VERSION_1)
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{
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DBG1(DBG_IMV, "no common IF-IMV 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-IMV Specification 1.3
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*/
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TNC_Result TNC_IMV_NotifyConnectionChange(TNC_IMVID imv_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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imv_state_t *state;
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if (!imv_test)
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{
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DBG1(DBG_IMV, "IMV \"%s\" has not been initialized", imv_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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state = imv_test_state_create(connection_id);
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return imv_test->create_state(imv_test, state);
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case TNC_CONNECTION_STATE_DELETE:
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return imv_test->delete_state(imv_test, connection_id);
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default:
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return imv_test->change_state(imv_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 receive_message(TNC_IMVID imv_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_imc_id,
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TNC_UInt32 dst_imv_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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linked_list_t *attr_list;
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imv_state_t *state;
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imv_test_state_t *test_state;
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enumerator_t *enumerator;
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TNC_Result result;
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int rounds;
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bool fatal_error, received_command = FALSE, retry = FALSE;
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if (!imv_test)
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{
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DBG1(DBG_IMV, "IMV \"%s\" has not been initialized", imv_name);
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return TNC_RESULT_NOT_INITIALIZED;
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}
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/* get current IMV state */
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if (!imv_test->get_state(imv_test, connection_id, &state))
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{
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return TNC_RESULT_FATAL;
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}
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test_state = (imv_test_state_t*)state;
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/* parse received PA-TNC message and automatically handle any errors */
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result = imv_test->receive_message(imv_test, state, msg, msg_vid,
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msg_subtype, src_imc_id, dst_imv_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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/* add any new IMC and set its number of rounds */
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rounds = lib->settings->get_int(lib->settings,
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"libimcv.plugins.imv-test.rounds", 0);
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test_state->add_imc(test_state, src_imc_id, rounds);
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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_ITA)
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{
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continue;
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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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char *command;
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received_command = TRUE;
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ita_attr = (ita_attr_command_t*)attr;
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command = ita_attr->get_command(ita_attr);
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if (streq(command, "allow"))
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{
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state->set_recommendation(state,
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TNC_IMV_ACTION_RECOMMENDATION_ALLOW,
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TNC_IMV_EVALUATION_RESULT_COMPLIANT);
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}
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else if (streq(command, "isolate"))
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{
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state->set_recommendation(state,
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TNC_IMV_ACTION_RECOMMENDATION_ISOLATE,
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TNC_IMV_EVALUATION_RESULT_NONCOMPLIANT_MINOR);
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}
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else if (streq(command, "block") || streq(command, "none"))
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{
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state->set_recommendation(state,
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TNC_IMV_ACTION_RECOMMENDATION_NO_ACCESS,
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TNC_IMV_EVALUATION_RESULT_NONCOMPLIANT_MAJOR);
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}
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else if (streq(command, "retry"))
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{
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retry = TRUE;
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}
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else
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{
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DBG1(DBG_IMV, "unsupported ITA Command '%s'", command);
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state->set_recommendation(state,
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TNC_IMV_ACTION_RECOMMENDATION_NO_RECOMMENDATION,
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TNC_IMV_EVALUATION_RESULT_ERROR);
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}
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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_IMV, "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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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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state->set_recommendation(state,
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TNC_IMV_ACTION_RECOMMENDATION_NO_RECOMMENDATION,
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TNC_IMV_EVALUATION_RESULT_ERROR);
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return imv_test->provide_recommendation(imv_test, connection_id,
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src_imc_id);
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}
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/* request a handshake retry ? */
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if (retry)
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{
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test_state->set_rounds(test_state, rounds);
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return imv_test->request_handshake_retry(imv_id, connection_id,
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TNC_RETRY_REASON_IMV_SERIOUS_EVENT);
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}
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/* repeat the measurement ? */
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if (test_state->another_round(test_state, src_imc_id))
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{
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attr_list = linked_list_create();
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attr = ita_attr_command_create("repeat");
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attr_list->insert_last(attr_list, attr);
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result = imv_test->send_message(imv_test, connection_id, TRUE, imv_id,
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src_imc_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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return received_command ? imv_test->provide_recommendation(imv_test,
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connection_id, src_imc_id) : TNC_RESULT_SUCCESS;
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}
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/**
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* see section 3.8.4 of TCG TNC IF-IMV Specification 1.3
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*/
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TNC_Result TNC_IMV_ReceiveMessage(TNC_IMVID imv_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(imv_id, connection_id, 0, chunk_create(msg, msg_len),
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msg_vid, msg_subtype, 0, TNC_IMVID_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_IMV_ReceiveMessageLong(TNC_IMVID imv_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_imc_id,
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TNC_UInt32 dst_imv_id)
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{
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return receive_message(imv_id, connection_id, msg_flags,
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chunk_create(msg, msg_len), msg_vid, msg_subtype,
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src_imc_id, dst_imv_id);
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}
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/**
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* see section 3.8.7 of TCG TNC IF-IMV Specification 1.3
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*/
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TNC_Result TNC_IMV_SolicitRecommendation(TNC_IMVID imv_id,
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TNC_ConnectionID connection_id)
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{
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if (!imv_test)
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{
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DBG1(DBG_IMV, "IMV \"%s\" has not been initialized", imv_name);
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return TNC_RESULT_NOT_INITIALIZED;
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}
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return imv_test->provide_recommendation(imv_test, connection_id,
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TNC_IMCID_ANY);
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}
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/**
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* see section 3.8.8 of TCG TNC IF-IMV Specification 1.3
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*/
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TNC_Result TNC_IMV_BatchEnding(TNC_IMVID imv_id,
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TNC_ConnectionID connection_id)
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{
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if (!imv_test)
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{
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DBG1(DBG_IMV, "IMV \"%s\" has not been initialized", imv_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 3.8.9 of TCG TNC IF-IMV Specification 1.3
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*/
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TNC_Result TNC_IMV_Terminate(TNC_IMVID imv_id)
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{
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if (!imv_test)
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{
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DBG1(DBG_IMV, "IMV \"%s\" has not been initialized", imv_name);
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return TNC_RESULT_NOT_INITIALIZED;
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}
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imv_test->destroy(imv_test);
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imv_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-IMV Specification 1.3
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*/
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TNC_Result TNC_IMV_ProvideBindFunction(TNC_IMVID imv_id,
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TNC_TNCS_BindFunctionPointer bind_function)
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{
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if (!imv_test)
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{
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DBG1(DBG_IMV, "IMV \"%s\" has not been initialized", imv_name);
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return TNC_RESULT_NOT_INITIALIZED;
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}
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return imv_test->bind_functions(imv_test, bind_function);
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}
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