438 lines
11 KiB
C
438 lines
11 KiB
C
/*
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* Copyright (C) 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_os_state.h"
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#include <imv/imv_agent.h>
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#include <imv/imv_msg.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_attr_request.h>
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#include <ietf/ietf_attr_default_pwd_enabled.h>
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#include <ietf/ietf_attr_fwd_enabled.h>
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#include <ietf/ietf_attr_installed_packages.h>
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#include <ietf/ietf_attr_op_status.h>
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#include <ietf/ietf_attr_pa_tnc_error.h>
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#include <ietf/ietf_attr_product_info.h>
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#include <ietf/ietf_attr_string_version.h>
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#include <os_info/os_info.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/linked_list.h>
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#include <debug.h>
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/* IMV definitions */
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static const char imv_name[] = "OS";
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static pen_type_t msg_types[] = {
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{ PEN_IETF, PA_SUBTYPE_IETF_OPERATING_SYSTEM }
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};
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static imv_agent_t *imv_os;
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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_os)
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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_os = imv_agent_create(imv_name, msg_types, 1, imv_id, actual_version);
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if (!imv_os)
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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_os)
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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_os_state_create(connection_id);
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return imv_os->create_state(imv_os, state);
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case TNC_CONNECTION_STATE_DELETE:
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return imv_os->delete_state(imv_os, connection_id);
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default:
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return imv_os->change_state(imv_os, 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(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_os_state_t *os_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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chunk_t os_name = chunk_empty;
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chunk_t os_version = chunk_empty;
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bool fatal_error = FALSE, assessment = 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 = imv_msg_create_as_reply(in_msg);
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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_IETF)
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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 IETF_ATTR_PRODUCT_INFORMATION:
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{
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ietf_attr_product_info_t *attr_cast;
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attr_cast = (ietf_attr_product_info_t*)attr;
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os_name = attr_cast->get_info(attr_cast, NULL, NULL);
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DBG1(DBG_IMV, "operating system name is '%.*s'",
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os_name.len, os_name.ptr);
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break;
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}
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case IETF_ATTR_STRING_VERSION:
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{
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ietf_attr_string_version_t *attr_cast;
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attr_cast = (ietf_attr_string_version_t*)attr;
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os_version = attr_cast->get_version(attr_cast, NULL, NULL);
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if (os_version.len)
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{
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DBG1(DBG_IMV, "operating system version is '%.*s'",
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os_version.len, os_version.ptr);
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}
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break;
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}
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case IETF_ATTR_OPERATIONAL_STATUS:
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{
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ietf_attr_op_status_t *attr_cast;
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op_status_t op_status;
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op_result_t op_result;
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time_t last_boot;
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attr_cast = (ietf_attr_op_status_t*)attr;
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op_status = attr_cast->get_status(attr_cast);
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op_result = attr_cast->get_result(attr_cast);
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last_boot = attr_cast->get_last_use(attr_cast);
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DBG1(DBG_IMV, "operational status: %N, result: %N",
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op_status_names, op_status, op_result_names, op_result);
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DBG1(DBG_IMV, "last boot: %T", &last_boot, TRUE);
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break;
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}
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case IETF_ATTR_FORWARDING_ENABLED:
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{
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ietf_attr_fwd_enabled_t *attr_cast;
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os_fwd_status_t fwd_status;
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attr_cast = (ietf_attr_fwd_enabled_t*)attr;
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fwd_status = attr_cast->get_status(attr_cast);
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DBG1(DBG_IMV, "IPv4 forwarding status: %N",
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os_fwd_status_names, fwd_status);
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break;
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}
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case IETF_ATTR_FACTORY_DEFAULT_PWD_ENABLED:
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{
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ietf_attr_default_pwd_enabled_t *attr_cast;
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bool default_pwd_status;
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attr_cast = (ietf_attr_default_pwd_enabled_t*)attr;
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default_pwd_status = attr_cast->get_status(attr_cast);
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DBG1(DBG_IMV, "factory default password: %sabled",
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default_pwd_status ? "en":"dis");
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break;
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}
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case IETF_ATTR_INSTALLED_PACKAGES:
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{
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ietf_attr_installed_packages_t *attr_cast;
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enumerator_t *e;
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chunk_t name, version;
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attr_cast = (ietf_attr_installed_packages_t*)attr;
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e = attr_cast->create_enumerator(attr_cast);
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while (e->enumerate(e, &name, &version))
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{
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DBG1(DBG_IMV, "package '%.*s' %.*s", name.len, name.ptr,
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version.len, version.ptr);
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}
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e->destroy(e);
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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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assessment = TRUE;
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break;
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}
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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 (os_name.len && os_version.len)
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{
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char *product_info;
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os_state = (imv_os_state_t*)state;
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os_state->set_info(os_state, os_name, os_version);
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product_info = os_state->get_info(os_state);
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if (streq(product_info, "Windows 1.2.3"))
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{
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DBG1(DBG_IMV, "OS '%s' is not supported", product_info);
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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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assessment = TRUE;
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}
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else
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{
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DBG1(DBG_IMV, "requesting installed packages for '%s'",
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product_info);
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attr = ietf_attr_attr_request_create(PEN_IETF,
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IETF_ATTR_INSTALLED_PACKAGES);
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out_msg->add_attribute(out_msg, attr);
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}
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}
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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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assessment = TRUE;
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}
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if (assessment)
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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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if (result != TNC_RESULT_SUCCESS)
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{
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return result;
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}
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return imv_os->provide_recommendation(imv_os, state);
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}
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/* send PA-TNC message with excl flag set */
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result = out_msg->send(out_msg, TRUE);
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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-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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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 (!imv_os)
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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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if (!imv_os->get_state(imv_os, 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 = imv_msg_create_from_data(imv_os, 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_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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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 (!imv_os)
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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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if (!imv_os->get_state(imv_os, 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 = imv_msg_create_from_long_data(imv_os, state, connection_id,
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src_imc_id, dst_imv_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-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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imv_state_t *state;
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if (!imv_os)
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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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if (!imv_os->get_state(imv_os, connection_id, &state))
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{
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return TNC_RESULT_FATAL;
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}
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return imv_os->provide_recommendation(imv_os, state);
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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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imv_state_t *state;
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imv_os_state_t *os_state;
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TNC_Result result = TNC_RESULT_SUCCESS;
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if (!imv_os)
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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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if (!imv_os->get_state(imv_os, connection_id, &state))
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{
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return TNC_RESULT_FATAL;
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}
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os_state = (imv_os_state_t*)state;
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if (os_state->get_info(os_state) == NULL)
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{
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imv_msg_t *out_msg;
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pa_tnc_attr_t *attr;
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ietf_attr_attr_request_t *attr_cast;
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out_msg = imv_msg_create(imv_os, state, connection_id, imv_id,
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TNC_IMCID_ANY, msg_types[0]);
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attr = ietf_attr_attr_request_create(PEN_IETF,
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IETF_ATTR_PRODUCT_INFORMATION);
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attr_cast = (ietf_attr_attr_request_t*)attr;
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attr_cast->add(attr_cast, PEN_IETF, IETF_ATTR_STRING_VERSION);
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attr_cast->add(attr_cast, PEN_IETF, IETF_ATTR_OPERATIONAL_STATUS);
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attr_cast->add(attr_cast, PEN_IETF, IETF_ATTR_FORWARDING_ENABLED);
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attr_cast->add(attr_cast, PEN_IETF, IETF_ATTR_FACTORY_DEFAULT_PWD_ENABLED);
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out_msg->add_attribute(out_msg, attr);
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/* send PA-TNC message with excl flag not set */
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result = out_msg->send(out_msg, FALSE);
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out_msg->destroy(out_msg);
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}
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return result;
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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_os)
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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_os->destroy(imv_os);
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imv_os = 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_os)
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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_os->bind_functions(imv_os, bind_function);
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}
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