338 lines
8.4 KiB
C
338 lines
8.4 KiB
C
/*
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* Copyright (C) 2013 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_swid_state.h"
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#include "libpts.h"
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#include "swid/swid_inventory.h"
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#include "swid/swid_error.h"
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#include "tcg/swid/tcg_swid_attr_req.h"
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#include "tcg/swid/tcg_swid_attr_tag_inv.h"
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#include "tcg/swid/tcg_swid_attr_tag_id_inv.h"
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#include <imc/imc_agent.h>
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#include <imc/imc_msg.h>
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#include <tncif_pa_subtypes.h>
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#include <pen/pen.h>
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#include <utils/debug.h>
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/* IMC definitions */
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static const char imc_name[] = "SWID";
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static pen_type_t msg_types[] = {
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{ PEN_TCG, PA_SUBTYPE_TCG_SWID }
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};
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static imc_agent_t *imc_swid;
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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_swid)
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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_swid = imc_agent_create(imc_name, msg_types, countof(msg_types),
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imc_id, actual_version);
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if (!imc_swid)
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{
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return TNC_RESULT_FATAL;
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}
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libpts_init();
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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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if (!imc_swid)
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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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state = imc_swid_state_create(connection_id);
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return imc_swid->create_state(imc_swid, state);
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case TNC_CONNECTION_STATE_HANDSHAKE:
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if (imc_swid->change_state(imc_swid, connection_id, new_state,
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&state) != TNC_RESULT_SUCCESS)
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{
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return TNC_RESULT_FATAL;
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}
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state->set_result(state, imc_id,
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TNC_IMV_EVALUATION_RESULT_DONT_KNOW);
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return TNC_RESULT_SUCCESS;
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case TNC_CONNECTION_STATE_DELETE:
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return imc_swid->delete_state(imc_swid, connection_id);
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default:
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return imc_swid->change_state(imc_swid, connection_id,
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new_state, NULL);
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}
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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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if (!imc_swid)
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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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if (!imc_swid->get_state(imc_swid, connection_id, &state))
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{
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return TNC_RESULT_FATAL;
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}
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return TNC_RESULT_SUCCESS;
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}
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static TNC_Result receive_message(imc_state_t *state, imc_msg_t *in_msg)
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{
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imc_msg_t *out_msg;
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imc_swid_state_t *swid_state;
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enumerator_t *enumerator;
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pa_tnc_attr_t *attr;
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pen_type_t type;
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TNC_Result result;
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bool fatal_error = FALSE;
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/* parse received PA-TNC message and handle local and remote errors */
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result = in_msg->receive(in_msg, &fatal_error);
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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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out_msg = imc_msg_create_as_reply(in_msg);
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swid_state = (imc_swid_state_t*)state;
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/* analyze PA-TNC attributes */
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enumerator = in_msg->create_attribute_enumerator(in_msg);
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while (enumerator->enumerate(enumerator, &attr))
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{
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tcg_swid_attr_req_t *attr_req;
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u_int8_t flags;
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u_int32_t request_id, eid_epoch;
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swid_inventory_t *swid_inventory, *targets;
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char *swid_directory;
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bool full_tags;
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type = attr->get_type(attr);
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if (type.vendor_id != PEN_TCG || type.type != TCG_SWID_REQUEST)
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{
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continue;
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}
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attr_req = (tcg_swid_attr_req_t*)attr;
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flags = attr_req->get_flags(attr_req);
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request_id = attr_req->get_request_id(attr_req);
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targets = attr_req->get_targets(attr_req);
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eid_epoch = swid_state->get_eid_epoch(swid_state);
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if (flags & (TCG_SWID_ATTR_REQ_FLAG_S | TCG_SWID_ATTR_REQ_FLAG_C))
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{
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attr = swid_error_create(TCG_SWID_SUBSCRIPTION_DENIED, request_id,
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0, "no subscription available yet");
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out_msg->add_attribute(out_msg, attr);
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break;
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}
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full_tags = (flags & TCG_SWID_ATTR_REQ_FLAG_R) == 0;
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swid_directory = lib->settings->get_str(lib->settings,
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"%s.plugins.imc-swid.swid_directory",
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SWID_DIRECTORY, lib->ns);
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swid_inventory = swid_inventory_create(full_tags);
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if (!swid_inventory->collect(swid_inventory, swid_directory, targets))
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{
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swid_inventory->destroy(swid_inventory);
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attr = swid_error_create(TCG_SWID_ERROR, request_id,
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0, "error in SWID tag collection");
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out_msg->add_attribute(out_msg, attr);
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break;
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}
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DBG1(DBG_IMC, "collected %d SWID tag%s%s",
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swid_inventory->get_count(swid_inventory), full_tags ? "" : " ID",
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swid_inventory->get_count(swid_inventory) == 1 ? "" : "s");
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if (full_tags)
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{
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attr = tcg_swid_attr_tag_inv_create(request_id, eid_epoch, 1,
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swid_inventory);
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}
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else
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{
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attr = tcg_swid_attr_tag_id_inv_create(request_id, eid_epoch, 1,
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swid_inventory);
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}
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out_msg->add_attribute(out_msg, attr);
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}
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enumerator->destroy(enumerator);
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if (fatal_error)
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{
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result = TNC_RESULT_FATAL;
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}
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else
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{
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result = out_msg->send(out_msg, TRUE);
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}
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out_msg->destroy(out_msg);
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return result;
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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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imc_state_t *state;
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imc_msg_t *in_msg;
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TNC_Result result;
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if (!imc_swid)
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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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if (!imc_swid->get_state(imc_swid, connection_id, &state))
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{
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return TNC_RESULT_FATAL;
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}
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in_msg = imc_msg_create_from_data(imc_swid, state, connection_id, msg_type,
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chunk_create(msg, msg_len));
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result = receive_message(state, in_msg);
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in_msg->destroy(in_msg);
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return result;
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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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imc_state_t *state;
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imc_msg_t *in_msg;
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TNC_Result result;
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if (!imc_swid)
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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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if (!imc_swid->get_state(imc_swid, connection_id, &state))
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{
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return TNC_RESULT_FATAL;
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}
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in_msg = imc_msg_create_from_long_data(imc_swid, state, connection_id,
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src_imv_id, dst_imc_id,msg_vid, msg_subtype,
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chunk_create(msg, msg_len));
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result =receive_message(state, in_msg);
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in_msg->destroy(in_msg);
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return result;
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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_swid)
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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_swid)
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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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libpts_deinit();
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imc_swid->destroy(imc_swid);
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imc_swid = 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_swid)
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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_swid->bind_functions(imc_swid, bind_function);
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}
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