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strongswan/src/libimcv/plugins/imc_os/imc_os.c

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/*
* Copyright (C) 2011-2012 Andreas Steffen
* HSR Hochschule fuer Technik Rapperswil
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*/
#include "imc_os_state.h"
#include <imc/imc_agent.h>
#include <imc/imc_msg.h>
#include <ietf/ietf_attr.h>
#include <ietf/ietf_attr_attr_request.h>
#include <ietf/ietf_attr_default_pwd_enabled.h>
#include <ietf/ietf_attr_fwd_enabled.h>
#include <ietf/ietf_attr_installed_packages.h>
#include <ietf/ietf_attr_numeric_version.h>
#include <ietf/ietf_attr_op_status.h>
#include <ietf/ietf_attr_product_info.h>
#include <ietf/ietf_attr_remediation_instr.h>
#include <ietf/ietf_attr_string_version.h>
#include <os_info/os_info.h>
#include <tncif_pa_subtypes.h>
#include <pen/pen.h>
#include <debug.h>
/* IMC definitions */
static const char imc_name[] = "OS";
static pen_type_t msg_types[] = {
{ PEN_IETF, PA_SUBTYPE_IETF_OPERATING_SYSTEM }
};
static imc_agent_t *imc_os;
static os_info_t *os;
/**
* see section 3.8.1 of TCG TNC IF-IMC Specification 1.3
*/
TNC_Result TNC_IMC_Initialize(TNC_IMCID imc_id,
TNC_Version min_version,
TNC_Version max_version,
TNC_Version *actual_version)
{
if (imc_os)
{
DBG1(DBG_IMC, "IMC \"%s\" has already been initialized", imc_name);
return TNC_RESULT_ALREADY_INITIALIZED;
}
imc_os = imc_agent_create(imc_name, msg_types, 1, imc_id, actual_version);
if (!imc_os)
{
return TNC_RESULT_FATAL;
}
os = os_info_create();
if (!os)
{
imc_os->destroy(imc_os);
imc_os = NULL;
return TNC_RESULT_FATAL;
}
if (min_version > TNC_IFIMC_VERSION_1 || max_version < TNC_IFIMC_VERSION_1)
{
DBG1(DBG_IMC, "no common IF-IMC version");
return TNC_RESULT_NO_COMMON_VERSION;
}
return TNC_RESULT_SUCCESS;
}
/**
* see section 3.8.2 of TCG TNC IF-IMC Specification 1.3
*/
TNC_Result TNC_IMC_NotifyConnectionChange(TNC_IMCID imc_id,
TNC_ConnectionID connection_id,
TNC_ConnectionState new_state)
{
imc_state_t *state;
if (!imc_os)
{
DBG1(DBG_IMC, "IMC \"%s\" has not been initialized", imc_name);
return TNC_RESULT_NOT_INITIALIZED;
}
switch (new_state)
{
case TNC_CONNECTION_STATE_CREATE:
state = imc_os_state_create(connection_id);
return imc_os->create_state(imc_os, state);
case TNC_CONNECTION_STATE_HANDSHAKE:
if (imc_os->change_state(imc_os, connection_id, new_state,
&state) != TNC_RESULT_SUCCESS)
{
return TNC_RESULT_FATAL;
}
state->set_result(state, imc_id,
TNC_IMV_EVALUATION_RESULT_DONT_KNOW);
return TNC_RESULT_SUCCESS;
case TNC_CONNECTION_STATE_DELETE:
return imc_os->delete_state(imc_os, connection_id);
default:
return imc_os->change_state(imc_os, connection_id,
new_state, NULL);
}
}
/**
* Add IETF Product Information attribute to the send queue
*/
static void add_product_info(imc_msg_t *msg)
{
pa_tnc_attr_t *attr;
attr = ietf_attr_product_info_create(PEN_IETF, 0, os->get_name(os));
msg->add_attribute(msg, attr);
}
/**
* Add IETF Numeric Version attribute to the send queue
*/
static void add_numeric_version(imc_msg_t *msg)
{
pa_tnc_attr_t *attr;
u_int32_t major, minor;
os->get_numeric_version(os, &major, &minor);
DBG1(DBG_IMC, "operating system numeric version is %d.%d",
major, minor);
attr = ietf_attr_numeric_version_create(major, minor, 0, 0, 0);
msg->add_attribute(msg, attr);
}
/**
* Add IETF String Version attribute to the send queue
*/
static void add_string_version(imc_msg_t *msg)
{
pa_tnc_attr_t *attr;
attr = ietf_attr_string_version_create(os->get_version(os),
chunk_empty, chunk_empty);
msg->add_attribute(msg, attr);
}
/**
* Add IETF Operational Status attribute to the send queue
*/
static void add_op_status(imc_msg_t *msg)
{
pa_tnc_attr_t *attr;
time_t uptime, last_boot;
uptime = os->get_uptime(os);
last_boot = uptime ? time(NULL) - uptime : UNDEFINED_TIME;
if (last_boot != UNDEFINED_TIME)
{
DBG1(DBG_IMC, "last boot: %T, %u s ago", &last_boot, TRUE, uptime);
}
attr = ietf_attr_op_status_create(OP_STATUS_OPERATIONAL,
OP_RESULT_SUCCESSFUL, last_boot);
msg->add_attribute(msg, attr);
}
/**
* Add IETF Forwarding Enabled attribute to the send queue
*/
static void add_fwd_enabled(imc_msg_t *msg)
{
pa_tnc_attr_t *attr;
os_fwd_status_t fwd_status;
fwd_status = os->get_fwd_status(os);
DBG1(DBG_IMC, "IPv4 forwarding status: %N",
os_fwd_status_names, fwd_status);
attr = ietf_attr_fwd_enabled_create(fwd_status);
msg->add_attribute(msg, attr);
}
/**
* Add IETF Factory Default Password Enabled attribute to the send queue
*/
static void add_default_pwd_enabled(imc_msg_t *msg)
{
pa_tnc_attr_t *attr;
DBG1(DBG_IMC, "factory default password: disabled");
attr = ietf_attr_default_pwd_enabled_create(FALSE);
msg->add_attribute(msg, attr);
}
/**
* Add an IETF Installed Packages attribute to the send queue
*/
static void add_installed_packages(imc_msg_t *msg)
{
pa_tnc_attr_t *attr;
ietf_attr_installed_packages_t *attr_cast;
chunk_t libc_name = { "libc-bin", 8 };
chunk_t libc_version = { "2.15-0ubuntu10.2", 16 };
chunk_t selinux_name = { "selinux", 7 };
chunk_t selinux_version = { "1:0.11", 6 };
attr = ietf_attr_installed_packages_create();
attr_cast = (ietf_attr_installed_packages_t*)attr;
attr_cast->add(attr_cast, libc_name, libc_version);
attr_cast->add(attr_cast, selinux_name, selinux_version);
msg->add_attribute(msg, attr);
}
/**
* see section 3.8.3 of TCG TNC IF-IMC Specification 1.3
*/
TNC_Result TNC_IMC_BeginHandshake(TNC_IMCID imc_id,
TNC_ConnectionID connection_id)
{
imc_state_t *state;
imc_msg_t *out_msg;
TNC_Result result = TNC_RESULT_SUCCESS;
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;
}
if (lib->settings->get_bool(lib->settings,
"libimcv.plugins.imc-os.send_info", TRUE))
{
out_msg = imc_msg_create(imc_os, state, connection_id, imc_id,
TNC_IMVID_ANY, msg_types[0]);
add_product_info(out_msg);
add_string_version(out_msg);
add_numeric_version(out_msg);
add_op_status(out_msg);
add_fwd_enabled(out_msg);
add_default_pwd_enabled(out_msg);
/* send PA-TNC message with the excl flag not set */
result = out_msg->send(out_msg, FALSE);
out_msg->destroy(out_msg);
}
return result;
}
static TNC_Result receive_message(imc_msg_t *in_msg)
{
imc_msg_t *out_msg;
enumerator_t *enumerator;
pa_tnc_attr_t *attr;
pen_type_t attr_type;
TNC_Result result;
bool fatal_error = FALSE;
/* parse received PA-TNC message and handle local and remote errors */
result = in_msg->receive(in_msg, &fatal_error);
if (result != TNC_RESULT_SUCCESS)
{
return result;
}
out_msg = imc_msg_create_as_reply(in_msg);
/* analyze PA-TNC attributes */
enumerator = in_msg->create_attribute_enumerator(in_msg);
while (enumerator->enumerate(enumerator, &attr))
{
attr_type = attr->get_type(attr);
if (attr_type.vendor_id != PEN_IETF)
{
continue;
}
if (attr_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)
{
continue;
}
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(out_msg);
break;
default:
break;
}
}
e->destroy(e);
}
else if (attr_type.type == IETF_ATTR_REMEDIATION_INSTRUCTIONS)
{
ietf_attr_remediation_instr_t *attr_cast;
pen_type_t parameters_type;
chunk_t parameters, string, lang_code;
attr_cast = (ietf_attr_remediation_instr_t*)attr;
parameters_type = attr_cast->get_parameters_type(attr_cast);
parameters = attr_cast->get_parameters(attr_cast);
if (parameters_type.vendor_id == PEN_IETF)
{
switch (parameters_type.type)
{
case IETF_REMEDIATION_PARAMETERS_URI:
DBG1(DBG_IMC, "remediation uri: '%.*s'",
parameters.len, parameters.ptr);
break;
case IETF_REMEDIATION_PARAMETERS_STRING:
string = attr_cast->get_string(attr_cast, &lang_code);
DBG1(DBG_IMC, "remediation string: '%.*s' [%.*s]",
string.len, string.ptr,
lang_code.len, lang_code.ptr);
break;
default:
DBG1(DBG_IMC, "remediation parameters %B", &parameters);
}
}
else
{
DBG1(DBG_IMC, "remediation parameters %B", &parameters);
}
}
}
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(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(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);
}
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