Implemented SWID prototype IMC/IMV pair
This commit is contained in:
Andreas Steffen
@@ -0,0 +1,425 @@
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/*
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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 "imv_swid_agent.h"
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#include "imv_swid_state.h"
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#include "libpts.h"
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#include "tcg/swid/tcg_swid_attr_req.h"
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#include "tcg/swid/tcg_swid_attr_tag_id_inv.h"
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#include <imcv.h>
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#include <imv/imv_agent.h>
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#include <imv/imv_msg.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 <utils/debug.h>
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typedef struct private_imv_swid_agent_t private_imv_swid_agent_t;
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/* Subscribed PA-TNC message subtypes */
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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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/**
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* Private data of an imv_swid_agent_t object.
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*/
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struct private_imv_swid_agent_t {
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/**
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* Public members of imv_swid_agent_t
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*/
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imv_agent_if_t public;
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/**
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* IMV agent responsible for generic functions
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*/
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imv_agent_t *agent;
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};
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METHOD(imv_agent_if_t, bind_functions, TNC_Result,
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private_imv_swid_agent_t *this, TNC_TNCS_BindFunctionPointer bind_function)
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{
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return this->agent->bind_functions(this->agent, bind_function);
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}
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METHOD(imv_agent_if_t, notify_connection_change, TNC_Result,
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private_imv_swid_agent_t *this, TNC_ConnectionID 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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switch (new_state)
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{
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case TNC_CONNECTION_STATE_CREATE:
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state = imv_swid_state_create(id);
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return this->agent->create_state(this->agent, state);
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case TNC_CONNECTION_STATE_DELETE:
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return this->agent->delete_state(this->agent, id);
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default:
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return this->agent->change_state(this->agent, id, new_state, NULL);
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}
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}
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/**
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* Process a received message
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*/
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static TNC_Result receive_msg(private_imv_swid_agent_t *this,
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imv_state_t *state, imv_msg_t *in_msg)
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{
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imv_msg_t *out_msg;
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imv_session_t *session;
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imv_workitem_t *workitem, *found = NULL;
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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_IMV_Evaluation_Result eval;
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TNC_IMV_Action_Recommendation rec;
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TNC_Result result;
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char *result_str;
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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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session = state->get_session(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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type = attr->get_type(attr);
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if (type.vendor_id != PEN_TCG)
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{
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continue;
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}
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switch (type.type)
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{
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case TCG_SWID_TAG_ID_INVENTORY:
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{
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tcg_swid_attr_tag_id_inv_t *attr_cast;
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u_int32_t request_id;
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swid_tag_id_t *tag_id;
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chunk_t tag_creator, unique_sw_id;
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enumerator_t *et, *ew;
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attr_cast = (tcg_swid_attr_tag_id_inv_t*)attr;
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request_id = attr_cast->get_request_id(attr_cast);
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DBG2(DBG_IMV, "received SWID tag ID inventory for request %d",
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request_id);
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et = attr_cast->create_tag_id_enumerator(attr_cast);
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while (et->enumerate(et, &tag_id))
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{
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tag_creator = tag_id->get_tag_creator(tag_id);
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unique_sw_id = tag_id->get_unique_sw_id(tag_id, NULL);
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DBG3(DBG_IMV, " %.*s_%.*s.swidtag",
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tag_creator.len, tag_creator.ptr,
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unique_sw_id.len, unique_sw_id.ptr);
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}
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et->destroy(et);
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if (request_id == 0)
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{
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/* TODO handle subscribed messages */
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break;
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}
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ew = session->create_workitem_enumerator(session);
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while (ew->enumerate(ew, &workitem))
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{
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if (workitem->get_id(workitem) == request_id)
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{
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found = workitem;
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break;
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}
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}
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if (!found)
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{
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DBG1(DBG_IMV, "no workitem found for SWID tag ID inventory "
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"with request ID %d", request_id);
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ew->destroy(ew);
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break;
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}
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eval = TNC_IMV_EVALUATION_RESULT_COMPLIANT;
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result_str = "received SWID tag ID inventory";
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session->remove_workitem(session, ew);
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ew->destroy(ew);
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rec = found->set_result(found, result_str, eval);
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state->update_recommendation(state, rec, eval);
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imcv_db->finalize_workitem(imcv_db, found);
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found->destroy(found);
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break;
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}
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case TCG_SWID_TAG_INVENTORY:
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break;
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default:
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break;
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}
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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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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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out_msg = imv_msg_create_as_reply(in_msg);
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result = out_msg->send_assessment(out_msg);
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out_msg->destroy(out_msg);
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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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return this->agent->provide_recommendation(this->agent, state);
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}
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return TNC_RESULT_SUCCESS;
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}
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METHOD(imv_agent_if_t, receive_message, TNC_Result,
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private_imv_swid_agent_t *this, TNC_ConnectionID id,
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TNC_MessageType msg_type, chunk_t msg)
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{
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imv_state_t *state;
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imv_msg_t *in_msg;
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TNC_Result result;
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if (!this->agent->get_state(this->agent, id, &state))
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{
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return TNC_RESULT_FATAL;
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}
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in_msg = imv_msg_create_from_data(this->agent, state, id, msg_type, msg);
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result = receive_msg(this, 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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METHOD(imv_agent_if_t, receive_message_long, TNC_Result,
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private_imv_swid_agent_t *this, TNC_ConnectionID id,
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TNC_UInt32 src_imc_id, TNC_UInt32 dst_imv_id,
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TNC_VendorID msg_vid, TNC_MessageSubtype msg_subtype, chunk_t msg)
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{
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imv_state_t *state;
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imv_msg_t *in_msg;
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TNC_Result result;
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if (!this->agent->get_state(this->agent, id, &state))
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{
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return TNC_RESULT_FATAL;
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}
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in_msg = imv_msg_create_from_long_data(this->agent, state, id,
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src_imc_id, dst_imv_id, msg_vid, msg_subtype, msg);
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result = receive_msg(this, 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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METHOD(imv_agent_if_t, batch_ending, TNC_Result,
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private_imv_swid_agent_t *this, TNC_ConnectionID id)
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{
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imv_msg_t *out_msg;
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imv_state_t *state;
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imv_session_t *session;
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imv_workitem_t *workitem;
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imv_swid_state_t *swid_state;
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imv_swid_handshake_state_t handshake_state;
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pa_tnc_attr_t *attr;
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TNC_IMVID imv_id;
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TNC_Result result = TNC_RESULT_SUCCESS;
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bool no_workitems = TRUE;
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u_int32_t request_id;
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u_int8_t flags;
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enumerator_t *enumerator;
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if (!this->agent->get_state(this->agent, id, &state))
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{
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return TNC_RESULT_FATAL;
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}
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swid_state = (imv_swid_state_t*)state;
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handshake_state = swid_state->get_handshake_state(swid_state);
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session = state->get_session(state);
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imv_id = this->agent->get_id(this->agent);
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if (handshake_state == IMV_SWID_STATE_END)
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{
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return TNC_RESULT_SUCCESS;
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}
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/* create an empty out message - we might need it */
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out_msg = imv_msg_create(this->agent, state, id, imv_id, TNC_IMCID_ANY,
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msg_types[0]);
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if (!session)
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{
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DBG2(DBG_IMV, "no workitems available - no evaluation possible");
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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_DONT_KNOW);
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result = out_msg->send_assessment(out_msg);
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out_msg->destroy(out_msg);
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swid_state->set_handshake_state(swid_state, IMV_SWID_STATE_END);
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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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return this->agent->provide_recommendation(this->agent, state);
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}
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if (handshake_state == IMV_SWID_STATE_INIT)
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{
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enumerator = session->create_workitem_enumerator(session);
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if (enumerator)
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{
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while (enumerator->enumerate(enumerator, &workitem))
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{
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if (workitem->get_imv_id(workitem) != TNC_IMVID_ANY ||
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workitem->get_type(workitem) != IMV_WORKITEM_SWID_TAGS)
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{
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continue;
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}
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flags = TCG_SWID_ATTR_REQ_FLAG_NONE;
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if (strchr(workitem->get_arg_str(workitem), 'R'))
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{
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flags |= TCG_SWID_ATTR_REQ_FLAG_R;
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}
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if (strchr(workitem->get_arg_str(workitem), 'S'))
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{
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flags |= TCG_SWID_ATTR_REQ_FLAG_S;
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}
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if (strchr(workitem->get_arg_str(workitem), 'C'))
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{
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flags |= TCG_SWID_ATTR_REQ_FLAG_C;
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}
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request_id = workitem->get_id(workitem);
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DBG2(DBG_IMV, "IMV %d issues SWID tag request %d",
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imv_id, request_id);
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attr = tcg_swid_attr_req_create(flags, request_id, 0);
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out_msg->add_attribute(out_msg, attr);
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workitem->set_imv_id(workitem, imv_id);
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no_workitems = FALSE;
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}
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enumerator->destroy(enumerator);
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if (no_workitems)
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{
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DBG2(DBG_IMV, "IMV %d has no workitems - "
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"no evaluation requested", imv_id);
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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_DONT_KNOW);
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}
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handshake_state = IMV_SWID_STATE_WORKITEMS;
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swid_state->set_handshake_state(swid_state, handshake_state);
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}
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}
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/* finalized all workitems ? */
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if (handshake_state == IMV_SWID_STATE_WORKITEMS &&
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session->get_workitem_count(session, imv_id) == 0)
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{
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result = out_msg->send_assessment(out_msg);
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out_msg->destroy(out_msg);
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swid_state->set_handshake_state(swid_state, IMV_SWID_STATE_END);
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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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return this->agent->provide_recommendation(this->agent, state);
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}
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/* send non-empty PA-TNC message with excl flag not set */
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if (out_msg->get_attribute_count(out_msg))
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{
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result = out_msg->send(out_msg, FALSE);
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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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METHOD(imv_agent_if_t, solicit_recommendation, TNC_Result,
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private_imv_swid_agent_t *this, TNC_ConnectionID id)
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{
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imv_state_t *state;
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if (!this->agent->get_state(this->agent, id, &state))
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{
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return TNC_RESULT_FATAL;
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}
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return this->agent->provide_recommendation(this->agent, state);
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}
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METHOD(imv_agent_if_t, destroy, void,
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private_imv_swid_agent_t *this)
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{
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this->agent->destroy(this->agent);
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free(this);
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libpts_deinit();
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}
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/**
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* Described in header.
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*/
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imv_agent_if_t *imv_swid_agent_create(const char *name, TNC_IMVID id,
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TNC_Version *actual_version)
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{
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private_imv_swid_agent_t *this;
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imv_agent_t *agent;
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agent = imv_agent_create(name, msg_types, countof(msg_types), id,
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actual_version);
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if (!agent)
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{
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return NULL;
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}
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INIT(this,
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.public = {
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.bind_functions = _bind_functions,
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.notify_connection_change = _notify_connection_change,
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.receive_message = _receive_message,
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.receive_message_long = _receive_message_long,
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.batch_ending = _batch_ending,
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.solicit_recommendation = _solicit_recommendation,
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.destroy = _destroy,
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},
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.agent = agent,
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);
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libpts_init();
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return &this->public;
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}
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