705 lines
17 KiB
C
705 lines
17 KiB
C
/*
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* Copyright (C) 2011-2014 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_os_state.h"
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#include <imc/imc_agent.h>
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#include <imc/imc_msg.h>
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#include <imc/imc_os_info.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_numeric_version.h>
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#include <ietf/ietf_attr_op_status.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 <ita/ita_attr.h>
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#include <ita/ita_attr_get_settings.h>
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#include <ita/ita_attr_settings.h>
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#include <ita/ita_attr_angel.h>
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#include <ita/ita_attr_device_id.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[] = "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 imc_agent_t *imc_os;
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static imc_os_info_t *os;
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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_os)
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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_os = imc_agent_create(imc_name, msg_types, countof(msg_types),
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imc_id, actual_version);
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if (!imc_os)
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{
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return TNC_RESULT_FATAL;
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}
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os = imc_os_info_create();
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if (!os)
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{
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imc_os->destroy(imc_os);
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imc_os = NULL;
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return TNC_RESULT_FATAL;
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}
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if (min_version > TNC_IFIMC_VERSION_1 || max_version < TNC_IFIMC_VERSION_1)
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{
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DBG1(DBG_IMC, "no common IF-IMC version");
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return TNC_RESULT_NO_COMMON_VERSION;
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}
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return TNC_RESULT_SUCCESS;
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}
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/**
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* see section 3.8.2 of TCG TNC IF-IMC Specification 1.3
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*/
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TNC_Result TNC_IMC_NotifyConnectionChange(TNC_IMCID imc_id,
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TNC_ConnectionID connection_id,
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TNC_ConnectionState new_state)
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{
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imc_state_t *state;
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if (!imc_os)
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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_os_state_create(connection_id);
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return imc_os->create_state(imc_os, state);
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case TNC_CONNECTION_STATE_HANDSHAKE:
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if (imc_os->change_state(imc_os, 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_os->delete_state(imc_os, connection_id);
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default:
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return imc_os->change_state(imc_os, 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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* Add IETF Product Information attribute to the send queue
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*/
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static void add_product_info(imc_msg_t *msg)
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{
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pa_tnc_attr_t *attr;
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os_type_t os_type;
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pen_t vendor_id = PEN_IETF;
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int i;
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typedef struct vendor_pen_t {
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os_type_t os_type;
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pen_t pen;
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} vendor_pen_t;
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vendor_pen_t vendor_pens[] = {
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{ OS_TYPE_DEBIAN, PEN_DEBIAN },
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{ OS_TYPE_UBUNTU, PEN_CANONICAL },
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{ OS_TYPE_FEDORA, PEN_FEDORA },
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{ OS_TYPE_REDHAT, PEN_REDHAT },
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{ OS_TYPE_ANDROID, PEN_GOOGLE }
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};
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os_type = os->get_type(os);
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for (i = 0; i < countof(vendor_pens); i++)
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{
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if (os_type == vendor_pens[i].os_type)
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{
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vendor_id = vendor_pens[i].pen;
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break;
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}
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}
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attr = ietf_attr_product_info_create(vendor_id, 0, os->get_name(os));
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msg->add_attribute(msg, attr);
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}
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/**
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* Add IETF Numeric Version attribute to the send queue
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*/
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static void add_numeric_version(imc_msg_t *msg)
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{
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pa_tnc_attr_t *attr;
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u_int32_t major, minor;
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os->get_numeric_version(os, &major, &minor);
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DBG1(DBG_IMC, "operating system numeric version is %d.%d",
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major, minor);
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attr = ietf_attr_numeric_version_create(major, minor, 0, 0, 0);
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msg->add_attribute(msg, attr);
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}
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/**
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* Add IETF String Version attribute to the send queue
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*/
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static void add_string_version(imc_msg_t *msg)
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{
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pa_tnc_attr_t *attr;
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attr = ietf_attr_string_version_create(os->get_version(os),
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chunk_empty, chunk_empty);
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msg->add_attribute(msg, attr);
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}
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/**
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* Add IETF Operational Status attribute to the send queue
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*/
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static void add_op_status(imc_msg_t *msg)
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{
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pa_tnc_attr_t *attr;
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time_t uptime, last_boot;
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uptime = os->get_uptime(os);
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last_boot = uptime ? time(NULL) - uptime : UNDEFINED_TIME;
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if (last_boot != UNDEFINED_TIME)
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{
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DBG1(DBG_IMC, "last boot: %T, %u s ago", &last_boot, TRUE, uptime);
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}
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attr = ietf_attr_op_status_create(OP_STATUS_OPERATIONAL,
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OP_RESULT_SUCCESSFUL, last_boot);
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msg->add_attribute(msg, attr);
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}
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/**
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* Add IETF Forwarding Enabled attribute to the send queue
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*/
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static void add_fwd_enabled(imc_msg_t *msg)
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{
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pa_tnc_attr_t *attr;
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os_fwd_status_t fwd_status;
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fwd_status = os->get_fwd_status(os);
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DBG1(DBG_IMC, "IPv4 forwarding is %N",
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os_fwd_status_names, fwd_status);
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attr = ietf_attr_fwd_enabled_create(fwd_status);
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msg->add_attribute(msg, attr);
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}
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/**
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* Add IETF Factory Default Password Enabled attribute to the send queue
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*/
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static void add_default_pwd_enabled(imc_msg_t *msg)
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{
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pa_tnc_attr_t *attr;
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DBG1(DBG_IMC, "factory default password is disabled");
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attr = ietf_attr_default_pwd_enabled_create(FALSE);
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msg->add_attribute(msg, attr);
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}
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/**
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* Add ITA Device ID attribute to the send queue
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*/
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static void add_device_id(imc_msg_t *msg)
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{
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pa_tnc_attr_t *attr;
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chunk_t value = chunk_empty, keyid;
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char *name, *device_id, *cert_path;
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certificate_t *cert = NULL;
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public_key_t *pubkey;
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/* Get the device ID as a character string */
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device_id = lib->settings->get_str(lib->settings,
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"%s.plugins.imc-os.device_id", NULL, lib->ns);
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if (device_id)
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{
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value = chunk_clone(chunk_from_str(device_id));
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}
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if (value.len == 0)
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{
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/* Derive the device ID from a raw public key */
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cert_path = lib->settings->get_str(lib->settings,
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"%s.plugins.imc-os.device_pubkey", NULL, lib->ns);
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if (cert_path)
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{
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cert = lib->creds->create(lib->creds, CRED_CERTIFICATE,
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CERT_TRUSTED_PUBKEY, BUILD_FROM_FILE,
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cert_path, BUILD_END);
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if (cert)
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{
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DBG2(DBG_IMC, "loaded device public key from '%s'", cert_path);
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}
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else
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{
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DBG1(DBG_IMC, "loading device public key from '%s' failed",
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cert_path);
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}
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}
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if (!cert)
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{
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/* Derive the device ID from the public key contained in a certificate */
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cert_path = lib->settings->get_str(lib->settings,
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"%s.plugins.imc-os.device_cert", NULL, lib->ns);
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if (cert_path)
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{
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cert = lib->creds->create(lib->creds, CRED_CERTIFICATE,
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CERT_X509, BUILD_FROM_FILE,
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cert_path, BUILD_END);
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if (cert)
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{
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DBG2(DBG_IMC, "loaded device certificate from '%s'", cert_path);
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}
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else
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{
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DBG1(DBG_IMC, "loading device certificate from '%s' failed",
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cert_path);
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}
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}
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}
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/* Compute the SHA-1 keyid of the retrieved device public key */
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if (cert)
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{
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pubkey = cert->get_public_key(cert);
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if (pubkey)
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{
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if (pubkey->get_fingerprint(pubkey, KEYID_PUBKEY_INFO_SHA1,
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&keyid))
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{
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value = chunk_to_hex(keyid, NULL, FALSE);
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}
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pubkey->destroy(pubkey);
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}
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cert->destroy(cert);
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}
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}
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if (value.len == 0)
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{
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/* Derive the device ID from some unique OS settings */
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name = os->get_type(os) == OS_TYPE_ANDROID ?
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"android_id" : "/var/lib/dbus/machine-id";
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value = os->get_setting(os, name);
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/* Trim trailing newline character */
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if (value.len > 0 && value.ptr[value.len - 1] == '\n')
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{
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value.len--;
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}
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}
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if (value.len == 0)
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{
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DBG1(DBG_IMC, "no device ID available");
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return;
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}
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DBG1(DBG_IMC, "device ID is %.*s", value.len, value.ptr);
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attr = ita_attr_device_id_create(value);
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msg->add_attribute(msg, attr);
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free(value.ptr);
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}
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/**
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* Add an IETF Installed Packages attribute to the send queue
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*/
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static void add_installed_packages(imc_state_t *state, imc_msg_t *msg)
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{
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pa_tnc_attr_t *attr = NULL, *attr_angel;
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ietf_attr_installed_packages_t *attr_cast;
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enumerator_t *enumerator;
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chunk_t name, version;
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size_t max_attr_size, attr_size, entry_size;
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bool first = TRUE;
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/**
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* Compute the maximum IETF Installed Packages attribute size
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* leaving space for an additional ITA Angel attribute
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*/
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max_attr_size = state->get_max_msg_len(state) -
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PA_TNC_HEADER_SIZE - PA_TNC_ATTR_HEADER_SIZE;
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/* At least one IETF Installed Packages attribute is sent */
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attr = ietf_attr_installed_packages_create();
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attr_size = PA_TNC_ATTR_HEADER_SIZE + IETF_INSTALLED_PACKAGES_MIN_SIZE;
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enumerator = os->create_package_enumerator(os);
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if (enumerator)
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{
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while (enumerator->enumerate(enumerator, &name, &version))
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{
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DBG2(DBG_IMC, "package '%.*s' (%.*s)",
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name.len, name.ptr, version.len, version.ptr);
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entry_size = 2 + name.len + version.len;
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if (attr_size + entry_size > max_attr_size)
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{
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if (first)
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{
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/**
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* Send an ITA Start Angel attribute to the IMV signalling
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* that multiple ITA Installed Package attributes follow.
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*/
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attr_angel = ita_attr_angel_create(TRUE);
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msg->add_attribute(msg, attr_angel);
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first = FALSE;
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}
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msg->add_attribute(msg, attr);
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/* create the next IETF Installed Packages attribute */
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attr = ietf_attr_installed_packages_create();
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attr_size = PA_TNC_ATTR_HEADER_SIZE +
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IETF_INSTALLED_PACKAGES_MIN_SIZE;
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}
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attr_cast = (ietf_attr_installed_packages_t*)attr;
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attr_cast->add(attr_cast, name, version);
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attr_size += entry_size;
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}
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enumerator->destroy(enumerator);
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}
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msg->add_attribute(msg, attr);
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if (!first)
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{
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/**
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* If we sent an ITA Start Angel attribute in the first place,
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* terminate by appending a matching ITA Stop Angel attribute.
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*/
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attr_angel = ita_attr_angel_create(FALSE);
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msg->add_attribute(msg, attr_angel);
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}
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}
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/**
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* Add ITA Settings attribute to the send queue
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*/
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static void add_settings(enumerator_t *enumerator, imc_msg_t *msg)
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{
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pa_tnc_attr_t *attr = NULL;
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ita_attr_settings_t *attr_cast;
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chunk_t value;
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char *name;
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bool first = TRUE;
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while (enumerator->enumerate(enumerator, &name))
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{
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DBG1(DBG_IMC, "setting '%s'", name);
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value = os->get_setting(os, name);
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if (!value.ptr)
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{
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continue;
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}
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if (first)
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{
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attr = ita_attr_settings_create();
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first = FALSE;
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}
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attr_cast = (ita_attr_settings_t*)attr;
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attr_cast->add(attr_cast, name, value);
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chunk_free(&value);
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}
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if (attr)
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{
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msg->add_attribute(msg, attr);
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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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imc_msg_t *out_msg;
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TNC_Result result = TNC_RESULT_SUCCESS;
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if (!imc_os)
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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_os->get_state(imc_os, connection_id, &state))
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{
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return TNC_RESULT_FATAL;
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}
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if (lib->settings->get_bool(lib->settings,
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"%s.plugins.imc-os.push_info", TRUE, lib->ns))
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{
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out_msg = imc_msg_create(imc_os, state, connection_id, imc_id,
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TNC_IMVID_ANY, msg_types[0]);
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add_product_info(out_msg);
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add_string_version(out_msg);
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add_numeric_version(out_msg);
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add_op_status(out_msg);
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add_fwd_enabled(out_msg);
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add_default_pwd_enabled(out_msg);
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add_device_id(out_msg);
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/* send PA-TNC message with the 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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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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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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/* 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);
|
|
|
|
if (type.vendor_id == PEN_IETF)
|
|
{
|
|
if (type.type == IETF_ATTR_ATTRIBUTE_REQUEST)
|
|
{
|
|
ietf_attr_attr_request_t *attr_cast;
|
|
pen_type_t *entry;
|
|
enumerator_t *e;
|
|
|
|
attr_cast = (ietf_attr_attr_request_t*)attr;
|
|
|
|
e = attr_cast->create_enumerator(attr_cast);
|
|
while (e->enumerate(e, &entry))
|
|
{
|
|
if (entry->vendor_id == PEN_IETF)
|
|
{
|
|
switch (entry->type)
|
|
{
|
|
case IETF_ATTR_PRODUCT_INFORMATION:
|
|
add_product_info(out_msg);
|
|
break;
|
|
case IETF_ATTR_STRING_VERSION:
|
|
add_string_version(out_msg);
|
|
break;
|
|
case IETF_ATTR_NUMERIC_VERSION:
|
|
add_numeric_version(out_msg);
|
|
break;
|
|
case IETF_ATTR_OPERATIONAL_STATUS:
|
|
add_op_status(out_msg);
|
|
break;
|
|
case IETF_ATTR_FORWARDING_ENABLED:
|
|
add_fwd_enabled(out_msg);
|
|
break;
|
|
case IETF_ATTR_FACTORY_DEFAULT_PWD_ENABLED:
|
|
add_default_pwd_enabled(out_msg);
|
|
break;
|
|
case IETF_ATTR_INSTALLED_PACKAGES:
|
|
add_installed_packages(state, out_msg);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
else if (entry->vendor_id == PEN_ITA)
|
|
{
|
|
switch (entry->type)
|
|
{
|
|
case ITA_ATTR_DEVICE_ID:
|
|
add_device_id(out_msg);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
e->destroy(e);
|
|
}
|
|
}
|
|
else if (type.vendor_id == PEN_ITA && type.type == ITA_ATTR_GET_SETTINGS)
|
|
{
|
|
ita_attr_get_settings_t *attr_cast;
|
|
enumerator_t *e;
|
|
|
|
attr_cast = (ita_attr_get_settings_t*)attr;
|
|
|
|
e = attr_cast->create_enumerator(attr_cast);
|
|
add_settings(e, out_msg);
|
|
e->destroy(e);
|
|
}
|
|
}
|
|
enumerator->destroy(enumerator);
|
|
|
|
if (fatal_error)
|
|
{
|
|
result = TNC_RESULT_FATAL;
|
|
}
|
|
else
|
|
{
|
|
result = out_msg->send(out_msg, TRUE);
|
|
}
|
|
out_msg->destroy(out_msg);
|
|
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* see section 3.8.4 of TCG TNC IF-IMC Specification 1.3
|
|
|
|
*/
|
|
TNC_Result TNC_IMC_ReceiveMessage(TNC_IMCID imc_id,
|
|
TNC_ConnectionID connection_id,
|
|
TNC_BufferReference msg,
|
|
TNC_UInt32 msg_len,
|
|
TNC_MessageType msg_type)
|
|
{
|
|
imc_state_t *state;
|
|
imc_msg_t *in_msg;
|
|
TNC_Result result;
|
|
|
|
if (!imc_os)
|
|
{
|
|
DBG1(DBG_IMC, "IMC \"%s\" has not been initialized", imc_name);
|
|
return TNC_RESULT_NOT_INITIALIZED;
|
|
}
|
|
if (!imc_os->get_state(imc_os, connection_id, &state))
|
|
{
|
|
return TNC_RESULT_FATAL;
|
|
}
|
|
in_msg = imc_msg_create_from_data(imc_os, state, connection_id, msg_type,
|
|
chunk_create(msg, msg_len));
|
|
result = receive_message(state, in_msg);
|
|
in_msg->destroy(in_msg);
|
|
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* see section 3.8.6 of TCG TNC IF-IMV Specification 1.3
|
|
*/
|
|
TNC_Result TNC_IMC_ReceiveMessageLong(TNC_IMCID imc_id,
|
|
TNC_ConnectionID connection_id,
|
|
TNC_UInt32 msg_flags,
|
|
TNC_BufferReference msg,
|
|
TNC_UInt32 msg_len,
|
|
TNC_VendorID msg_vid,
|
|
TNC_MessageSubtype msg_subtype,
|
|
TNC_UInt32 src_imv_id,
|
|
TNC_UInt32 dst_imc_id)
|
|
{
|
|
imc_state_t *state;
|
|
imc_msg_t *in_msg;
|
|
TNC_Result result;
|
|
|
|
if (!imc_os)
|
|
{
|
|
DBG1(DBG_IMC, "IMC \"%s\" has not been initialized", imc_name);
|
|
return TNC_RESULT_NOT_INITIALIZED;
|
|
}
|
|
if (!imc_os->get_state(imc_os, connection_id, &state))
|
|
{
|
|
return TNC_RESULT_FATAL;
|
|
}
|
|
in_msg = imc_msg_create_from_long_data(imc_os, state, connection_id,
|
|
src_imv_id, dst_imc_id,msg_vid, msg_subtype,
|
|
chunk_create(msg, msg_len));
|
|
result =receive_message(state, in_msg);
|
|
in_msg->destroy(in_msg);
|
|
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* see section 3.8.7 of TCG TNC IF-IMC Specification 1.3
|
|
*/
|
|
TNC_Result TNC_IMC_BatchEnding(TNC_IMCID imc_id,
|
|
TNC_ConnectionID connection_id)
|
|
{
|
|
if (!imc_os)
|
|
{
|
|
DBG1(DBG_IMC, "IMC \"%s\" has not been initialized", imc_name);
|
|
return TNC_RESULT_NOT_INITIALIZED;
|
|
}
|
|
return TNC_RESULT_SUCCESS;
|
|
}
|
|
|
|
/**
|
|
* see section 3.8.8 of TCG TNC IF-IMC Specification 1.3
|
|
*/
|
|
TNC_Result TNC_IMC_Terminate(TNC_IMCID imc_id)
|
|
{
|
|
if (!imc_os)
|
|
{
|
|
DBG1(DBG_IMC, "IMC \"%s\" has not been initialized", imc_name);
|
|
return TNC_RESULT_NOT_INITIALIZED;
|
|
}
|
|
imc_os->destroy(imc_os);
|
|
imc_os = NULL;
|
|
|
|
os->destroy(os);
|
|
os = NULL;
|
|
|
|
return TNC_RESULT_SUCCESS;
|
|
}
|
|
|
|
/**
|
|
* see section 4.2.8.1 of TCG TNC IF-IMC Specification 1.3
|
|
*/
|
|
TNC_Result TNC_IMC_ProvideBindFunction(TNC_IMCID imc_id,
|
|
TNC_TNCC_BindFunctionPointer bind_function)
|
|
{
|
|
if (!imc_os)
|
|
{
|
|
DBG1(DBG_IMC, "IMC \"%s\" has not been initialized", imc_name);
|
|
return TNC_RESULT_NOT_INITIALIZED;
|
|
}
|
|
return imc_os->bind_functions(imc_os, bind_function);
|
|
}
|