imv-swima: Created SWIMA IMV plugin

8 files changed, 1667 insertions, 0 deletions

diff --git a/src/libimcv/plugins/imv_swima/Makefile.am b/src/libimcv/plugins/imv_swima/Makefile.am
new file mode 100644
index 000000000..0c548411d
--- /dev/null
+++ b/src/libimcv/plugins/imv_swima/Makefile.am
@@ -0,0 +1,22 @@
+AM_CPPFLAGS = \
+	-I$(top_srcdir)/src/libstrongswan \
+	-I$(top_srcdir)/src/libtncif \
+	-I$(top_srcdir)/src/libtpmtss \
+	-I$(top_srcdir)/src/libimcv
+
+AM_CFLAGS = \
+	$(PLUGIN_CFLAGS) $(json_CFLAGS)
+
+imcv_LTLIBRARIES = imv-swima.la
+
+imv_swima_la_LIBADD = \
+	$(top_builddir)/src/libimcv/libimcv.la \
+	$(top_builddir)/src/libstrongswan/libstrongswan.la \
+	$(json_LIBS)
+
+imv_swima_la_SOURCES = \
+	imv_swima.c imv_swima_state.h imv_swima_state.c \
+	imv_swima_agent.h imv_swima_agent.c \
+	imv_swima_rest.h imv_swima_rest.c
+
+imv_swima_la_LDFLAGS = -module -avoid-version -no-undefined
diff --git a/src/libimcv/plugins/imv_swima/imv_swima.c b/src/libimcv/plugins/imv_swima/imv_swima.c
new file mode 100644
index 000000000..0d78ea034
--- /dev/null
+++ b/src/libimcv/plugins/imv_swima/imv_swima.c
@@ -0,0 +1,24 @@
+/*
+ * Copyright (C) 2017 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 "imv_swima_agent.h"
+
+static const char imv_name[] = "SWIMA";
+static const imv_agent_create_t imv_agent_create = imv_swima_agent_create;
+
+/* include generic TGC TNC IF-IMV API code below */
+
+#include <imv/imv_if.h>
+
diff --git a/src/libimcv/plugins/imv_swima/imv_swima_agent.c b/src/libimcv/plugins/imv_swima/imv_swima_agent.c
new file mode 100644
index 000000000..5d653fffc
--- /dev/null
+++ b/src/libimcv/plugins/imv_swima/imv_swima_agent.c
@@ -0,0 +1,778 @@
+/*
+ * Copyright (C) 2017 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.
+ */
+
+#define _GNU_SOURCE
+#include <stdio.h>
+
+#include "imv_swima_agent.h"
+#include "imv_swima_state.h"
+#include "imv_swima_rest.h"
+
+#include <imcv.h>
+#include <imv/imv_agent.h>
+#include <imv/imv_msg.h>
+#include "tcg/seg/tcg_seg_attr_max_size.h"
+#include "tcg/seg/tcg_seg_attr_seg_env.h"
+#include "ietf/swima/ietf_swima_attr_req.h"
+#include "ietf/swima/ietf_swima_attr_sw_inv.h"
+#include "ietf/swima/ietf_swima_attr_sw_ev.h"
+#include "swima/swima_error.h"
+#include "swima/swima_inventory.h"
+#include "swima/swima_events.h"
+#include "swima/swima_data_model.h"
+
+#include <tncif_names.h>
+#include <tncif_pa_subtypes.h>
+
+#include <pen/pen.h>
+#include <utils/debug.h>
+#include <bio/bio_reader.h>
+
+typedef struct private_imv_swima_agent_t private_imv_swima_agent_t;
+
+/* Subscribed PA-TNC message subtypes */
+static pen_type_t msg_types[] = {
+	{ PEN_IETF, PA_SUBTYPE_IETF_SW }
+};
+
+/**
+ * Flag set when corresponding attribute has been received
+ */
+enum imv_swima_attr_t {
+	IMV_SWIMA_ATTR_SW_INV =    (1<<0),
+	IMV_SWIMA_ATTR_SW_ID_INV = (1<<1)
+};
+
+/**
+ * Private data of an imv_swima_agent_t object.
+ */
+struct private_imv_swima_agent_t {
+
+	/**
+	 * Public members of imv_swima_agent_t
+	 */
+	imv_agent_if_t public;
+
+	/**
+	 * IMV agent responsible for generic functions
+	 */
+	imv_agent_t *agent;
+
+	/**
+	 * REST API to strongTNC manager
+	 */
+	imv_swima_rest_t *rest_api;
+
+};
+
+METHOD(imv_agent_if_t, bind_functions, TNC_Result,
+	private_imv_swima_agent_t *this, TNC_TNCS_BindFunctionPointer bind_function)
+{
+	return this->agent->bind_functions(this->agent, bind_function);
+}
+
+METHOD(imv_agent_if_t, notify_connection_change, TNC_Result,
+	private_imv_swima_agent_t *this, TNC_ConnectionID id,
+	TNC_ConnectionState new_state)
+{
+	imv_state_t *state;
+
+	switch (new_state)
+	{
+		case TNC_CONNECTION_STATE_CREATE:
+			state = imv_swima_state_create(id);
+			return this->agent->create_state(this->agent, state);
+		case TNC_CONNECTION_STATE_DELETE:
+			return this->agent->delete_state(this->agent, id);
+		default:
+			return this->agent->change_state(this->agent, id, new_state, NULL);
+	}
+}
+
+/**
+ * Process a received message
+ */
+static TNC_Result receive_msg(private_imv_swima_agent_t *this,
+							  imv_state_t *state, imv_msg_t *in_msg)
+{
+	imv_swima_state_t *swima_state;
+	imv_msg_t *out_msg;
+	enumerator_t *enumerator;
+	pa_tnc_attr_t *attr;
+	TNC_Result result;
+	bool fatal_error = FALSE;
+
+	/* generate an outgoing PA-TNC message - we might need it */
+	out_msg = imv_msg_create_as_reply(in_msg);
+
+	/* parse received PA-TNC message and handle local and remote errors */
+	result = in_msg->receive(in_msg, out_msg, &fatal_error);
+	if (result != TNC_RESULT_SUCCESS)
+	{
+		out_msg->destroy(out_msg);
+		return result;
+	}
+
+	swima_state = (imv_swima_state_t*)state;
+
+	/* analyze PA-TNC attributes */
+	enumerator = in_msg->create_attribute_enumerator(in_msg);
+	while (enumerator->enumerate(enumerator, &attr))
+	{
+		uint32_t request_id = 0, last_eid, eid_epoch;
+		swima_inventory_t *inventory;
+		swima_events_t *events;
+		pen_type_t type;
+
+		type = attr->get_type(attr);
+
+        if (type.vendor_id != PEN_IETF)
+        {
+            continue;
+        }
+
+		switch (type.type)
+		{
+			case IETF_ATTR_PA_TNC_ERROR:
+			{
+				ietf_attr_pa_tnc_error_t *error_attr;
+				pen_type_t error_code;
+				chunk_t msg_info, description;
+				bio_reader_t *reader;
+				uint32_t max_attr_size;
+				bool success;
+
+				error_attr = (ietf_attr_pa_tnc_error_t*)attr;
+				error_code = error_attr->get_error_code(error_attr);
+
+				if (error_code.vendor_id != PEN_IETF ||
+					error_code.type <= PA_ERROR_PA_TNC_MSG_ROOF)
+				{
+					continue;
+				}
+				msg_info = error_attr->get_msg_info(error_attr);
+				reader = bio_reader_create(msg_info);
+				success = reader->read_uint32(reader, &request_id);
+
+				DBG1(DBG_IMV, "received PA-TNC error '%N' for request %d",
+					 pa_tnc_error_code_names, error_code.type, request_id);
+				if (!success)
+				{
+					reader->destroy(reader);
+					continue;
+				}
+				if (error_code.type == PA_ERROR_SW_RESPONSE_TOO_LARGE)
+				{
+					if (!reader->read_uint32(reader, &max_attr_size))
+					{
+						reader->destroy(reader);
+						continue;
+					}
+					DBG1(DBG_IMV, "  maximum PA-TNC attribute size is %u bytes",
+						max_attr_size);
+				}
+				description = reader->peek(reader);
+				if (description.len)
+				{ 
+					DBG1(DBG_IMV, "  description: %.*s", description.len,
+														 description.ptr);
+				}
+				reader->destroy(reader);
+				break;
+			}
+			case IETF_ATTR_SW_ID_INVENTORY:
+			{
+				ietf_swima_attr_sw_inv_t *attr_cast;
+				uint32_t missing;
+				int sw_id_count;
+
+				state->set_action_flags(state, IMV_SWIMA_ATTR_SW_ID_INV);
+
+				attr_cast = (ietf_swima_attr_sw_inv_t*)attr;
+				request_id = attr_cast->get_request_id(attr_cast);
+				inventory = attr_cast->get_inventory(attr_cast);
+				last_eid = inventory->get_eid(inventory, &eid_epoch);
+				sw_id_count = inventory->get_count(inventory);
+				missing = attr_cast->get_record_count(attr_cast);
+				swima_state->set_missing(swima_state, missing);
+
+				DBG2(DBG_IMV, "received software identity inventory with "
+					 "%d item%s for request %d at eid %d of epoch 0x%08x, "
+					 "%d item%s to follow", sw_id_count,
+					 (sw_id_count == 1) ? "" : "s", request_id, last_eid,
+					 eid_epoch, missing, (missing == 1) ? "" : "s");
+
+				if (request_id == swima_state->get_request_id(swima_state))
+				{
+					swima_state->set_inventory(swima_state, inventory);
+					swima_state->set_count(swima_state, sw_id_count, 0,
+										   in_msg->get_src_id(in_msg));
+				}
+				else
+				{
+					DBG1(DBG_IMV, "no workitem found for software identity "
+								  "inventory with request ID %d", request_id);
+				}
+				attr_cast->clear_inventory(attr_cast);
+				break;
+			 }
+			case IETF_ATTR_SW_INVENTORY:
+			{
+				ietf_swima_attr_sw_inv_t *attr_cast;
+				swima_record_t *sw_record;
+				json_object *jobj, *jarray, *jstring;
+				pen_type_t data_model;
+				chunk_t tag;
+				char *tag_str;
+				uint32_t missing;
+				int sw_count;
+				enumerator_t *e;
+
+				state->set_action_flags(state, IMV_SWIMA_ATTR_SW_INV);
+
+				attr_cast = (ietf_swima_attr_sw_inv_t*)attr;
+				request_id = attr_cast->get_request_id(attr_cast);
+				inventory = attr_cast->get_inventory(attr_cast);
+				last_eid = inventory->get_eid(inventory, &eid_epoch);
+				sw_count = inventory->get_count(inventory);
+				missing = attr_cast->get_record_count(attr_cast);
+				swima_state->set_missing(swima_state, missing);
+
+				DBG2(DBG_IMV, "received software inventory with %d item%s for "
+					 "request %d at eid %d of epoch 0x%08x, %d item%s to follow",
+					 sw_count, (sw_count == 1) ? "" : "s", request_id,
+					 last_eid, eid_epoch, missing, (missing == 1) ? "" : "s");
+
+				if (request_id == swima_state->get_request_id(swima_state))
+				{
+					swima_state->set_count(swima_state, 0, sw_count,
+										  in_msg->get_src_id(in_msg));
+
+					if (this->rest_api)
+					{
+						jobj = json_object_new_object();
+						jarray = json_object_new_array();
+						json_object_object_add(jobj, "data", jarray);
+
+						e = inventory->create_enumerator(inventory);
+						while (e->enumerate(e, &sw_record))
+						{
+							tag = sw_record->get_record(sw_record);
+							DBG3(DBG_IMV, "%.*s", tag.len, tag.ptr);
+
+							data_model = sw_record->get_data_model(sw_record);
+							if (!pen_type_equals(data_model,
+										swima_data_model_iso_2015_swid_xml))
+							{
+								DBG1(DBG_IMV, "only ISO/IEC 19770-2-2015 XML "
+											  "data model supported");
+								continue;
+							}
+
+							tag_str = strndup(tag.ptr, tag.len);
+							jstring = json_object_new_string(tag_str);
+							json_object_array_add(jarray, jstring);
+							free(tag_str);
+						}
+						e->destroy(e);
+
+						if (this->rest_api->post(this->rest_api,
+								"swid/add-tags/", jobj, NULL) != SUCCESS)
+						{
+							DBG1(DBG_IMV, "error in REST API add-tags request");
+						}
+						json_object_put(jobj);
+					}
+				}
+				else
+				{
+					DBG1(DBG_IMV, "no workitem found for SWID tag inventory "
+								  "with request ID %d", request_id);
+				}
+				attr_cast->clear_inventory(attr_cast);
+				break;
+			}
+			case IETF_ATTR_SW_ID_EVENTS:
+			{
+				ietf_swima_attr_sw_ev_t *attr_cast;
+				uint32_t missing;
+				int sw_ev_count;
+
+				state->set_action_flags(state, IMV_SWIMA_ATTR_SW_ID_INV);
+
+				attr_cast = (ietf_swima_attr_sw_ev_t*)attr;
+				request_id = attr_cast->get_request_id(attr_cast);
+				events = attr_cast->get_events(attr_cast);
+				last_eid = events->get_eid(events, &eid_epoch, NULL);
+				sw_ev_count = events->get_count(events);
+				missing = attr_cast->get_event_count(attr_cast);
+				swima_state->set_missing(swima_state, missing);
+
+				DBG2(DBG_IMV, "received software identity events with "
+					 "%d item%s for request %d at eid %d of epoch 0x%08x, "
+					 "%d item%s to follow", sw_ev_count,
+					 (sw_ev_count == 1) ? "" : "s", request_id, last_eid,
+					 eid_epoch, missing, (missing == 1) ? "" : "s");
+
+				if (request_id == swima_state->get_request_id(swima_state))
+				{
+					swima_state->set_events(swima_state, events);
+					swima_state->set_count(swima_state, sw_ev_count, 0,
+										   in_msg->get_src_id(in_msg));
+				}
+				else
+				{
+					DBG1(DBG_IMV, "no workitem found for software identity "
+								  "evemts with request ID %d", request_id);
+				}
+				attr_cast->clear_events(attr_cast);
+				break;
+
+			}
+			default:
+				break;
+		 }
+	}
+	enumerator->destroy(enumerator);
+
+	if (fatal_error)
+	{
+		state->set_recommendation(state,
+								TNC_IMV_ACTION_RECOMMENDATION_NO_RECOMMENDATION,
+								TNC_IMV_EVALUATION_RESULT_ERROR);
+		result = out_msg->send_assessment(out_msg);
+		if (result == TNC_RESULT_SUCCESS)
+		{
+			result = this->agent->provide_recommendation(this->agent, state);
+		}
+	}
+	else
+	{
+		/* send PA-TNC message with the EXCL flag set */
+		result = out_msg->send(out_msg, TRUE);
+	}
+	out_msg->destroy(out_msg);
+
+	return result;
+}
+
+METHOD(imv_agent_if_t, receive_message, TNC_Result,
+	private_imv_swima_agent_t *this, TNC_ConnectionID id,
+	TNC_MessageType msg_type, chunk_t msg)
+{
+	imv_state_t *state;
+	imv_msg_t *in_msg;
+	TNC_Result result;
+
+	if (!this->agent->get_state(this->agent, id, &state))
+	{
+		return TNC_RESULT_FATAL;
+	}
+	in_msg = imv_msg_create_from_data(this->agent, state, id, msg_type, msg);
+	result = receive_msg(this, state, in_msg);
+	in_msg->destroy(in_msg);
+
+	return result;
+}
+
+METHOD(imv_agent_if_t, receive_message_long, TNC_Result,
+	private_imv_swima_agent_t *this, TNC_ConnectionID id,
+	TNC_UInt32 src_imc_id, TNC_UInt32 dst_imv_id,
+	TNC_VendorID msg_vid, TNC_MessageSubtype msg_subtype, chunk_t msg)
+{
+	imv_state_t *state;
+	imv_msg_t *in_msg;
+	TNC_Result result;
+
+	if (!this->agent->get_state(this->agent, id, &state))
+	{
+		return TNC_RESULT_FATAL;
+	}
+	in_msg = imv_msg_create_from_long_data(this->agent, state, id,
+					src_imc_id, dst_imv_id, msg_vid, msg_subtype, msg);
+	result = receive_msg(this, state, in_msg);
+	in_msg->destroy(in_msg);
+
+	return result;
+
+}
+
+METHOD(imv_agent_if_t, batch_ending, TNC_Result,
+	private_imv_swima_agent_t *this, TNC_ConnectionID id)
+{
+	imv_msg_t *out_msg;
+	imv_state_t *state;
+	imv_session_t *session;
+	imv_workitem_t *workitem;
+	imv_swima_state_t *swima_state;
+	imv_swima_handshake_state_t handshake_state;
+	pa_tnc_attr_t *attr;
+	TNC_IMVID imv_id;
+	TNC_Result result = TNC_RESULT_SUCCESS;
+	bool no_workitems = TRUE;
+	uint32_t request_id, received;
+	uint8_t flags;
+	enumerator_t *enumerator;
+
+	if (!this->agent->get_state(this->agent, id, &state))
+	{
+		return TNC_RESULT_FATAL;
+	}
+	swima_state = (imv_swima_state_t*)state;
+	handshake_state = swima_state->get_handshake_state(swima_state);
+	session = state->get_session(state);
+	imv_id = this->agent->get_id(this->agent);
+
+	if (handshake_state == IMV_SWIMA_STATE_END)
+	{
+		return TNC_RESULT_SUCCESS;
+	}
+
+	/* Create an empty out message - we might need it */
+	out_msg = imv_msg_create(this->agent, state, id, imv_id,
+							 swima_state->get_imc_id(swima_state),
+							 msg_types[0]);
+
+	if (!imcv_db)
+	{
+		DBG2(DBG_IMV, "no workitems available - no evaluation possible");
+		state->set_recommendation(state,
+							TNC_IMV_ACTION_RECOMMENDATION_ALLOW,
+							TNC_IMV_EVALUATION_RESULT_DONT_KNOW);
+		result = out_msg->send_assessment(out_msg);
+		out_msg->destroy(out_msg);
+		swima_state->set_handshake_state(swima_state, IMV_SWIMA_STATE_END);
+
+		if (result != TNC_RESULT_SUCCESS)
+		{
+			return result;
+		}
+		return this->agent->provide_recommendation(this->agent, state);
+	}
+
+	/* Look for SWID tag workitem and create SWID tag request */
+	if (handshake_state == IMV_SWIMA_STATE_INIT &&
+		session->get_policy_started(session))
+	{
+		size_t max_attr_size = SWIMA_MAX_ATTR_SIZE;
+		size_t max_seg_size;
+		ietf_swima_attr_req_t *cast_attr;
+		seg_contract_t *contract;
+		seg_contract_manager_t *contracts;
+		swima_inventory_t *targets;
+		uint32_t earliest_eid = 0;
+		char buf[BUF_LEN];
+
+		enumerator = session->create_workitem_enumerator(session);
+		if (enumerator)
+		{
+			while (enumerator->enumerate(enumerator, &workitem))
+			{
+				if (workitem->get_imv_id(workitem) != TNC_IMVID_ANY ||
+					workitem->get_type(workitem) != IMV_WORKITEM_SWID_TAGS)
+				{
+					continue;
+				}
+				
+				flags = IETF_SWIMA_ATTR_REQ_FLAG_NONE;
+				if (strchr(workitem->get_arg_str(workitem), 'R'))
+				{
+					flags |= IETF_SWIMA_ATTR_REQ_FLAG_R;
+				}
+				if (strchr(workitem->get_arg_str(workitem), 'S'))
+				{
+					flags |= IETF_SWIMA_ATTR_REQ_FLAG_S;
+				}
+				if (strchr(workitem->get_arg_str(workitem), 'C'))
+				{
+					flags |= IETF_SWIMA_ATTR_REQ_FLAG_C;
+				}
+
+				/* Determine maximum PA-TNC attribute segment size */
+				max_seg_size = state->get_max_msg_len(state)
+								- PA_TNC_HEADER_SIZE 
+								- PA_TNC_ATTR_HEADER_SIZE
+								- TCG_SEG_ATTR_SEG_ENV_HEADER;
+
+				/* Announce support of PA-TNC segmentation to IMC */
+				contract = seg_contract_create(msg_types[0], max_attr_size,
+									max_seg_size, TRUE, imv_id, FALSE);
+				contract->get_info_string(contract, buf, BUF_LEN, TRUE);
+				DBG2(DBG_IMV, "%s", buf);
+				contracts = state->get_contracts(state);
+				contracts->add_contract(contracts, contract);
+				attr = tcg_seg_attr_max_size_create(max_attr_size,
+													max_seg_size, TRUE);
+				out_msg->add_attribute(out_msg, attr);
+
+				/* Issue a SWID request */
+				request_id = workitem->get_id(workitem);
+				swima_state->set_request_id(swima_state, request_id);
+				attr = ietf_swima_attr_req_create(flags, request_id);
+
+				/* Request software identifier events */
+				targets = swima_inventory_create();
+				targets->set_eid(targets, earliest_eid, 0);
+				cast_attr = (ietf_swima_attr_req_t*)attr;
+				cast_attr->set_targets(cast_attr, targets);
+
+				out_msg->add_attribute(out_msg, attr);
+				workitem->set_imv_id(workitem, imv_id);
+				no_workitems = FALSE;
+				DBG2(DBG_IMV, "IMV %d issues sw request %d", imv_id, request_id);
+				break;
+			}
+			enumerator->destroy(enumerator);
+
+			if (no_workitems)
+			{
+				DBG2(DBG_IMV, "IMV %d has no workitems - "
+							  "no evaluation requested", imv_id);
+				state->set_recommendation(state,
+								TNC_IMV_ACTION_RECOMMENDATION_ALLOW,
+								TNC_IMV_EVALUATION_RESULT_DONT_KNOW);
+			}
+			handshake_state = IMV_SWIMA_STATE_WORKITEMS;
+			swima_state->set_handshake_state(swima_state, handshake_state);
+		}
+	}
+
+	received = state->get_action_flags(state);
+
+	if (handshake_state == IMV_SWIMA_STATE_WORKITEMS &&
+	   (received & (IMV_SWIMA_ATTR_SW_INV|IMV_SWIMA_ATTR_SW_ID_INV)) &&
+		swima_state->get_missing(swima_state) == 0)
+	{
+		TNC_IMV_Evaluation_Result eval;
+		TNC_IMV_Action_Recommendation rec;
+		char result_str[BUF_LEN], *error_str = "", *command;
+		char *target_str;
+		int tag_id_count, tag_count, i;
+		json_object *jrequest, *jresponse, *jvalue;
+		ietf_swima_attr_req_t *cast_attr;
+		swima_inventory_t *targets;
+		swima_record_t *target;
+		status_t status = SUCCESS;
+
+		if (this->rest_api && (received & IMV_SWIMA_ATTR_SW_ID_INV))
+		{
+			if (asprintf(&command, "sessions/%d/swid-measurement/",
+						 session->get_session_id(session, NULL, NULL)) < 0)
+			{
+				error_str = "allocation of command string failed";
+				status = FAILED;
+			}
+			else
+			{
+				jrequest = swima_state->get_inventory(swima_state);
+				status = this->rest_api->post(this->rest_api, command,
+											  jrequest, &jresponse);
+				if (status == FAILED)
+				{
+					error_str = "error in REST API swid-measurement request";
+				}
+				free(command);
+			}
+		}
+
+		switch (status)
+		{
+			case SUCCESS:
+				enumerator = session->create_workitem_enumerator(session);
+				while (enumerator->enumerate(enumerator, &workitem))
+				{
+					if (workitem->get_type(workitem) == IMV_WORKITEM_SWID_TAGS)
+					{
+						swima_state->get_count(swima_state, &tag_id_count,
+														  &tag_count);
+						snprintf(result_str, BUF_LEN, "received inventory of "
+								 "%d SWID tag ID%s and %d SWID tag%s",
+								 tag_id_count, (tag_id_count == 1) ? "" : "s",
+								 tag_count, (tag_count == 1) ? "" : "s");
+						session->remove_workitem(session, enumerator);
+
+						eval = TNC_IMV_EVALUATION_RESULT_COMPLIANT;
+						rec = workitem->set_result(workitem, result_str, eval);
+						state->update_recommendation(state, rec, eval);
+						imcv_db->finalize_workitem(imcv_db, workitem);
+						workitem->destroy(workitem);
+						break;
+					}
+				}
+				enumerator->destroy(enumerator);
+				break;
+			case NEED_MORE:
+				if (received & IMV_SWIMA_ATTR_SW_INV)
+				{
+					error_str = "not all requested SWID tags were received";
+					status = FAILED;
+					json_object_put(jresponse);
+					break;
+				}
+				if (json_object_get_type(jresponse) != json_type_array)
+				{
+					error_str = "response was not a json_array";
+					status = FAILED;
+					json_object_put(jresponse);
+					break;
+				}
+
+				/* Create an IETF SW Request attribute */
+				attr = ietf_swima_attr_req_create(IETF_SWIMA_ATTR_REQ_FLAG_NONE,
+								swima_state->get_request_id(swima_state));
+				tag_id_count = json_object_array_length(jresponse);
+				DBG1(DBG_IMV, "%d SWID tag target%s", tag_id_count,
+							  (tag_id_count == 1) ? "" : "s");
+				swima_state->set_missing(swima_state, tag_id_count);
+				targets = swima_inventory_create();
+
+				for (i = 0; i < tag_id_count; i++)
+				{
+					jvalue = json_object_array_get_idx(jresponse, i);
+					if (json_object_get_type(jvalue) != json_type_string)
+					{
+						error_str = "json_string element expected in json_array";
+						status = FAILED;
+						json_object_put(jresponse);
+						break;
+					}
+					target_str = (char*)json_object_get_string(jvalue);
+					DBG1(DBG_IMV, "  %s", target_str);
+					target = swima_record_create(0, chunk_from_str(target_str),
+													chunk_empty);
+					targets->add(targets, target);
+				}
+				json_object_put(jresponse);
+
+				cast_attr = (ietf_swima_attr_req_t*)attr;
+				cast_attr->set_targets(cast_attr, targets);
+				targets->destroy(targets);
+				out_msg->add_attribute(out_msg, attr);
+				break;
+			case FAILED:
+			default:
+				break;
+		}
+
+		if (status == FAILED)
+		{
+			enumerator = session->create_workitem_enumerator(session);
+			while (enumerator->enumerate(enumerator, &workitem))
+			{
+				if (workitem->get_type(workitem) == IMV_WORKITEM_SWID_TAGS)
+				{
+					session->remove_workitem(session, enumerator);
+					eval = TNC_IMV_EVALUATION_RESULT_ERROR;
+					rec = workitem->set_result(workitem, error_str, eval);
+					state->update_recommendation(state, rec, eval);
+					imcv_db->finalize_workitem(imcv_db, workitem);
+					workitem->destroy(workitem);
+					break;
+				}
+			}
+			enumerator->destroy(enumerator);
+		}
+	}
+
+	/* finalized all workitems ? */
+	if (handshake_state == IMV_SWIMA_STATE_WORKITEMS &&
+		session->get_workitem_count(session, imv_id) == 0)
+	{
+		result = out_msg->send_assessment(out_msg);
+		out_msg->destroy(out_msg);
+		swima_state->set_handshake_state(swima_state, IMV_SWIMA_STATE_END);
+
+		if (result != TNC_RESULT_SUCCESS)
+		{
+			return result;
+		}
+		return this->agent->provide_recommendation(this->agent, state);
+	}
+
+	/* send non-empty PA-TNC message with excl flag not set */
+	if (out_msg->get_attribute_count(out_msg))
+	{
+		result = out_msg->send(out_msg, FALSE);
+	}
+	out_msg->destroy(out_msg);
+
+	return result;
+}
+
+METHOD(imv_agent_if_t, solicit_recommendation, TNC_Result,
+	private_imv_swima_agent_t *this, TNC_ConnectionID id)
+{
+	imv_state_t *state;
+
+	if (!this->agent->get_state(this->agent, id, &state))
+	{
+		return TNC_RESULT_FATAL;
+	}
+	return this->agent->provide_recommendation(this->agent, state);
+}
+
+METHOD(imv_agent_if_t, destroy, void,
+	private_imv_swima_agent_t *this)
+{
+	DESTROY_IF(this->rest_api);
+	this->agent->destroy(this->agent);
+	free(this);
+}
+
+/**
+ * Described in header.
+ */
+imv_agent_if_t *imv_swima_agent_create(const char *name, TNC_IMVID id,
+										 TNC_Version *actual_version)
+{
+	private_imv_swima_agent_t *this;
+	imv_agent_t *agent;
+	char *rest_api_uri;
+	u_int rest_api_timeout;
+
+	agent = imv_agent_create(name, msg_types, countof(msg_types), id,
+							 actual_version);
+	if (!agent)
+	{
+		return NULL;
+	}
+	agent->add_non_fatal_attr_type(agent,
+				pen_type_create(PEN_TCG, TCG_SEG_MAX_ATTR_SIZE_REQ));
+
+	INIT(this,
+		.public = {
+			.bind_functions = _bind_functions,
+			.notify_connection_change = _notify_connection_change,
+			.receive_message = _receive_message,
+			.receive_message_long = _receive_message_long,
+			.batch_ending = _batch_ending,
+			.solicit_recommendation = _solicit_recommendation,
+			.destroy = _destroy,
+		},
+		.agent = agent,
+	);
+
+	rest_api_uri = lib->settings->get_str(lib->settings,
+						"%s.plugins.imv-swima.rest_api_uri", NULL, lib->ns);
+	rest_api_timeout = lib->settings->get_int(lib->settings,
+						"%s.plugins.imv-swima.rest_api_timeout", 120, lib->ns);
+	if (rest_api_uri)
+	{
+		this->rest_api = imv_swima_rest_create(rest_api_uri, rest_api_timeout);
+	}
+
+	return &this->public;
+}
+
diff --git a/src/libimcv/plugins/imv_swima/imv_swima_agent.h b/src/libimcv/plugins/imv_swima/imv_swima_agent.h
new file mode 100644
index 000000000..d07c774dc
--- /dev/null
+++ b/src/libimcv/plugins/imv_swima/imv_swima_agent.h
@@ -0,0 +1,36 @@
+/*
+ * Copyright (C) 2017 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.
+ */
+
+/**
+ * @defgroup imv_swima_agent_t imv_swima_agent
+ * @{ @ingroup imv_swima
+ */
+
+#ifndef IMV_SWIMA_AGENT_H_
+#define IMV_SWIMA_AGENT_H_
+
+#include <imv/imv_agent_if.h>
+
+/**
+ * Creates an SWID IMV agent
+ *
+ * @param name					Name of the IMV
+ * @param id					ID of the IMV
+ * @param actual_version		TNC IF-IMV version
+ */
+imv_agent_if_t* imv_swima_agent_create(const char* name, TNC_IMVID id,
+									   TNC_Version *actual_version);
+
+#endif /** IMV_SWIMA_AGENT_H_ @}*/
diff --git a/src/libimcv/plugins/imv_swima/imv_swima_rest.c b/src/libimcv/plugins/imv_swima/imv_swima_rest.c
new file mode 100644
index 000000000..b82e38a6a
--- /dev/null
+++ b/src/libimcv/plugins/imv_swima/imv_swima_rest.c
@@ -0,0 +1,124 @@
+/*
+ * Copyright (C) 2017 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.
+ */
+
+#define _GNU_SOURCE
+#include <stdio.h>
+
+#include "imv_swima_rest.h"
+
+typedef struct private_imv_swima_rest_t private_imv_swima_rest_t;
+
+/**
+ * Private data of an imv_swima_rest_t object.
+ */
+struct private_imv_swima_rest_t {
+
+	/**
+	 * Public members of imv_swima_rest_t
+	 */
+	imv_swima_rest_t public;
+
+	/**
+	 * URI of REST API
+	 */
+	char *uri;
+
+	/**
+	 * Timeout of REST API connection
+	 */
+	u_int timeout;
+
+};
+
+#define HTTP_STATUS_CODE_PRECONDITION_FAILED	412
+
+METHOD(imv_swima_rest_t, post, status_t,
+	private_imv_swima_rest_t *this, char *command, json_object *jrequest,
+	json_object **jresponse)
+{
+	struct json_tokener *tokener;
+	chunk_t data, response = chunk_empty;
+	status_t status;
+	char *uri;
+	int code;
+
+	if (asprintf(&uri, "%s%s",this->uri, command) < 0)
+	{
+		return FAILED;
+	}
+	data = chunk_from_str((char*)json_object_to_json_string(jrequest));
+
+	status = lib->fetcher->fetch(lib->fetcher, uri, &response,
+				FETCH_TIMEOUT, this->timeout,
+				FETCH_REQUEST_DATA, data,
+				FETCH_REQUEST_TYPE, "application/json; charset=utf-8",
+				FETCH_REQUEST_HEADER, "Accept: application/json",
+				FETCH_REQUEST_HEADER, "Expect:",
+				FETCH_RESPONSE_CODE, &code,
+				FETCH_END);
+	free(uri);
+
+	if (status != SUCCESS)
+	{
+		if (code != HTTP_STATUS_CODE_PRECONDITION_FAILED || !response.ptr)
+		{
+			DBG2(DBG_IMV, "REST http request failed with status code: %d", code);
+			status = FAILED;
+		}
+		else
+		{
+			if (jresponse)
+			{
+				/* Parse HTTP response into a JSON object */
+				tokener = json_tokener_new();
+				*jresponse = json_tokener_parse_ex(tokener, response.ptr,
+															response.len);
+				json_tokener_free(tokener);
+			}
+			status = NEED_MORE;
+		}
+	}
+	free(response.ptr);
+
+	return status;
+}
+
+METHOD(imv_swima_rest_t, destroy, void,
+	private_imv_swima_rest_t *this)
+{
+	free(this->uri);
+	free(this);
+}
+
+/**
+ * Described in header.
+ */
+imv_swima_rest_t *imv_swima_rest_create(char *uri, u_int timeout)
+{
+	private_imv_swima_rest_t *this;
+
+	INIT(this,
+		.public = {
+			.post = _post,
+			.destroy = _destroy,
+		},
+		.uri = strdup(uri),
+		.timeout = timeout,
+	);
+
+	return &this->public;
+}
+
+
diff --git a/src/libimcv/plugins/imv_swima/imv_swima_rest.h b/src/libimcv/plugins/imv_swima/imv_swima_rest.h
new file mode 100644
index 000000000..55266ddbd
--- /dev/null
+++ b/src/libimcv/plugins/imv_swima/imv_swima_rest.h
@@ -0,0 +1,63 @@
+/*
+ * Copyright (C) 2017 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.
+ */
+
+/**
+ * @defgroup imv_swima imv_swima
+ * @ingroup libimcv_plugins
+ *
+ * @defgroup imv_swima_rest_t imv_swima_rest
+ * @{ @ingroup imv_swima
+ */
+
+#ifndef IMV_SWIMA_REST_H_
+#define IMV_SWIMA_REST_H_
+
+#include <library.h>
+
+#include <json.h>
+
+typedef struct imv_swima_rest_t imv_swima_rest_t;
+
+/**
+ * Public REST interface
+ */
+struct imv_swima_rest_t {
+
+	/**
+	 * Post a HTTP request including a JSON object
+	 *
+	 * @param jreq		JSON object in HTTP request
+	 * @param jresp		JSON object in HTTP response if NEED_MORE
+	 * @return			Status (SUCCESS, NEED_MORE or FAILED)
+	 */
+	status_t (*post)(imv_swima_rest_t *this, char *command, json_object *jreq,
+					 json_object **jresp);
+
+	/**
+	 * Destroy imv_swima_rest_t object
+	 */
+	void (*destroy)(imv_swima_rest_t *this);
+
+};
+
+/**
+ * Create an imv_swima_rest_t instance
+ *
+ * @param uri			REST URI (http://username:password@hostname[:port]/api/)
+ * @param timeout		Timeout of the REST connection
+ */
+imv_swima_rest_t* imv_swima_rest_create(char *uri, u_int timeout);
+
+#endif /** IMV_SWIMA_REST_H_ @}*/
diff --git a/src/libimcv/plugins/imv_swima/imv_swima_state.c b/src/libimcv/plugins/imv_swima/imv_swima_state.c
new file mode 100644
index 000000000..04defae36
--- /dev/null
+++ b/src/libimcv/plugins/imv_swima/imv_swima_state.c
@@ -0,0 +1,460 @@
+/*
+ * Copyright (C) 2017 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 "imv_swima_state.h"
+
+#include <imv/imv_lang_string.h>
+#include <imv/imv_reason_string.h>
+#include <imv/imv_remediation_string.h>
+
+#include <tncif_policy.h>
+
+#include <utils/debug.h>
+
+typedef struct private_imv_swima_state_t private_imv_swima_state_t;
+
+/**
+ * Private data of an imv_swima_state_t object.
+ */
+struct private_imv_swima_state_t {
+
+	/**
+	 * Public members of imv_swima_state_t
+	 */
+	imv_swima_state_t public;
+
+	/**
+	 * TNCCS connection ID
+	 */
+	TNC_ConnectionID connection_id;
+
+	/**
+	 * TNCCS connection state
+	 */
+	TNC_ConnectionState state;
+
+	/**
+	 * Does the TNCCS connection support long message types?
+	 */
+	bool has_long;
+
+	/**
+	 * Does the TNCCS connection support exclusive delivery?
+	 */
+	bool has_excl;
+
+	/**
+	 * Maximum PA-TNC message size for this TNCCS connection
+	 */
+	uint32_t max_msg_len;
+
+	/**
+	 * Flags set for completed actions
+	 */
+	uint32_t action_flags;
+
+	/**
+	 * IMV database session associated with TNCCS connection
+	 */
+	imv_session_t *session;
+
+	/**
+	 * PA-TNC attribute segmentation contracts associated with TNCCS connection
+	 */
+	seg_contract_manager_t *contracts;
+
+	/**
+	 * IMV action recommendation
+	 */
+	TNC_IMV_Action_Recommendation rec;
+
+	/**
+	 * IMV evaluation result
+	 */
+	TNC_IMV_Evaluation_Result eval;
+
+	/**
+	 * IMV Scanner handshake state
+	 */
+	imv_swima_handshake_state_t handshake_state;
+
+	/**
+	 * TNC Reason String
+	 */
+	imv_reason_string_t *reason_string;
+
+	/**
+	 * IETF Remediation Instructions String
+	 */
+	imv_remediation_string_t *remediation_string;
+
+	/**
+	 * SWID Tag Request ID
+	 */
+	uint32_t request_id;
+
+	/**
+	 * Number of processed SWID Tag IDs
+	 */
+	int tag_id_count;
+
+	/**
+	 * Number of processed SWID Tags
+	 */
+	int tag_count;
+
+	/**
+	 * Number of missing SWID Tags or Tag IDs
+	 */
+	uint32_t missing;
+
+	/**
+	 * SWID IMC ID
+	 */
+	TNC_UInt32 imc_id;
+
+	/**
+	 * Top level JSON object
+	 */
+	json_object *jobj;
+
+	/**
+	 * JSON array containing an inventory of SWID Tag IDs
+	 */
+	json_object *jarray;
+
+};
+
+METHOD(imv_state_t, get_connection_id, TNC_ConnectionID,
+	private_imv_swima_state_t *this)
+{
+	return this->connection_id;
+}
+
+METHOD(imv_state_t, has_long, bool,
+	private_imv_swima_state_t *this)
+{
+	return this->has_long;
+}
+
+METHOD(imv_state_t, has_excl, bool,
+	private_imv_swima_state_t *this)
+{
+	return this->has_excl;
+}
+
+METHOD(imv_state_t, set_flags, void,
+	private_imv_swima_state_t *this, bool has_long, bool has_excl)
+{
+	this->has_long = has_long;
+	this->has_excl = has_excl;
+}
+
+METHOD(imv_state_t, set_max_msg_len, void,
+	private_imv_swima_state_t *this, uint32_t max_msg_len)
+{
+	this->max_msg_len = max_msg_len;
+}
+
+METHOD(imv_state_t, get_max_msg_len, uint32_t,
+	private_imv_swima_state_t *this)
+{
+	return this->max_msg_len;
+}
+
+METHOD(imv_state_t, set_action_flags, void,
+	private_imv_swima_state_t *this, uint32_t flags)
+{
+	this->action_flags |= flags;
+}
+
+METHOD(imv_state_t, get_action_flags, uint32_t,
+	private_imv_swima_state_t *this)
+{
+	return this->action_flags;
+}
+
+METHOD(imv_state_t, set_session, void,
+	private_imv_swima_state_t *this, imv_session_t *session)
+{
+	this->session = session;
+}
+
+METHOD(imv_state_t, get_session, imv_session_t*,
+	private_imv_swima_state_t *this)
+{
+	return this->session;
+}
+
+METHOD(imv_state_t, get_contracts, seg_contract_manager_t*,
+	private_imv_swima_state_t *this)
+{
+	return this->contracts;
+}
+
+METHOD(imv_state_t, change_state, void,
+	private_imv_swima_state_t *this, TNC_ConnectionState new_state)
+{
+	this->state = new_state;
+}
+
+METHOD(imv_state_t, get_recommendation, void,
+	private_imv_swima_state_t *this, TNC_IMV_Action_Recommendation *rec,
+									   TNC_IMV_Evaluation_Result *eval)
+{
+	*rec = this->rec;
+	*eval = this->eval;
+}
+
+METHOD(imv_state_t, set_recommendation, void,
+	private_imv_swima_state_t *this, TNC_IMV_Action_Recommendation rec,
+									   TNC_IMV_Evaluation_Result eval)
+{
+	this->rec = rec;
+	this->eval = eval;
+}
+
+METHOD(imv_state_t, update_recommendation, void,
+	private_imv_swima_state_t *this, TNC_IMV_Action_Recommendation rec,
+									   TNC_IMV_Evaluation_Result eval)
+{
+	this->rec  = tncif_policy_update_recommendation(this->rec, rec);
+	this->eval = tncif_policy_update_evaluation(this->eval, eval);
+}
+
+METHOD(imv_state_t, get_reason_string, bool,
+	private_imv_swima_state_t *this, enumerator_t *language_enumerator,
+	chunk_t *reason_string, char **reason_language)
+{
+	return FALSE;
+}
+
+METHOD(imv_state_t, get_remediation_instructions, bool,
+	private_imv_swima_state_t *this, enumerator_t *language_enumerator,
+	chunk_t *string, char **lang_code, char **uri)
+{
+	return FALSE;
+}
+
+METHOD(imv_state_t, destroy, void,
+	private_imv_swima_state_t *this)
+{
+	json_object_put(this->jobj);
+	DESTROY_IF(this->session);
+	DESTROY_IF(this->reason_string);
+	DESTROY_IF(this->remediation_string);
+	this->contracts->destroy(this->contracts);
+	free(this);
+}
+
+METHOD(imv_swima_state_t, set_handshake_state, void,
+	private_imv_swima_state_t *this, imv_swima_handshake_state_t new_state)
+{
+	this->handshake_state = new_state;
+}
+
+METHOD(imv_swima_state_t, get_handshake_state, imv_swima_handshake_state_t,
+	private_imv_swima_state_t *this)
+{
+	return this->handshake_state;
+}
+
+METHOD(imv_swima_state_t, set_request_id, void,
+	private_imv_swima_state_t *this, uint32_t request_id)
+{
+	this->request_id = request_id;
+}
+
+METHOD(imv_swima_state_t, get_request_id, uint32_t,
+	private_imv_swima_state_t *this)
+{
+	return this->request_id;
+}
+
+METHOD(imv_swima_state_t, set_inventory, void,
+    private_imv_swima_state_t *this, swima_inventory_t *inventory)
+{
+	chunk_t sw_id, sw_locator;
+	uint32_t record_id;
+	char *sw_id_str;
+	json_object *jstring;
+	swima_record_t *sw_record;
+	enumerator_t *enumerator;
+
+	enumerator = inventory->create_enumerator(inventory);
+	while (enumerator->enumerate(enumerator, &sw_record))
+	{
+		record_id = sw_record->get_record_id(sw_record);
+		sw_id = sw_record->get_sw_id(sw_record, &sw_locator);
+		sw_id_str = strndup(sw_id.ptr, sw_id.len);
+		if (sw_locator.len)
+		{
+			DBG3(DBG_IMV, "%6u: %s @ %.*s", record_id, sw_id_str,
+						   sw_locator.len, sw_locator.ptr);
+		}
+		else
+		{
+			DBG3(DBG_IMV, "%6u: %s", record_id, sw_id_str);
+		}
+
+		/* Add software identity to JSON array */
+		jstring = json_object_new_string(sw_id_str);
+		json_object_array_add(this->jarray, jstring);
+		free(sw_id_str);
+	}
+	enumerator->destroy(enumerator);
+}
+
+METHOD(imv_swima_state_t, get_inventory, json_object*,
+	private_imv_swima_state_t *this)
+{
+	return this->jobj;
+}
+
+METHOD(imv_swima_state_t, set_events, void,
+    private_imv_swima_state_t *this, swima_events_t *events)
+{
+	chunk_t sw_id, timestamp;
+	uint32_t record_id, eid;
+	char *sw_id_str;
+	json_object *jstring;
+	swima_event_t *sw_event;
+	swima_record_t *sw_record;
+	enumerator_t *enumerator;
+
+	enumerator = events->create_enumerator(events);
+	while (enumerator->enumerate(enumerator, &sw_event))
+	{
+		eid = sw_event->get_eid(sw_event, &timestamp);
+		sw_record = sw_event->get_sw_record(sw_event);
+		record_id = sw_record->get_record_id(sw_record);
+		sw_id = sw_record->get_sw_id(sw_record, NULL);
+		sw_id_str = strndup(sw_id.ptr, sw_id.len);
+		DBG3(DBG_IMV, "%3u %.*s %6u: %s", eid, timestamp.len, timestamp.ptr,
+										  record_id, sw_id_str);
+
+		/* Add software identity to JSON array */
+		jstring = json_object_new_string(sw_id_str);
+		json_object_array_add(this->jarray, jstring);
+		free(sw_id_str);
+	}
+	enumerator->destroy(enumerator);
+}
+
+METHOD(imv_swima_state_t, get_events, json_object*,
+	private_imv_swima_state_t *this)
+{
+	return this->jobj;
+}
+
+METHOD(imv_swima_state_t, set_missing, void,
+	private_imv_swima_state_t *this, uint32_t count)
+{
+	this->missing = count;
+}
+
+METHOD(imv_swima_state_t, get_missing, uint32_t,
+	private_imv_swima_state_t *this)
+{
+	return this->missing;
+}
+
+METHOD(imv_swima_state_t, set_count, void,
+	private_imv_swima_state_t *this, int tag_id_count, int tag_count,
+	TNC_UInt32 imc_id)
+{
+	this->tag_id_count += tag_id_count;
+	this->tag_count += tag_count;
+	this->imc_id = imc_id;
+}
+
+METHOD(imv_swima_state_t, get_count, void,
+	private_imv_swima_state_t *this, int *tag_id_count, int *tag_count)
+{
+	if (tag_id_count)
+	{
+		*tag_id_count = this->tag_id_count;
+	}
+	if (tag_count)
+	{
+		*tag_count = this->tag_count;
+	}
+}
+
+METHOD(imv_swima_state_t, get_imc_id, TNC_UInt32,
+	private_imv_swima_state_t *this)
+{
+	return this->imc_id;
+}
+
+/**
+ * Described in header.
+ */
+imv_state_t *imv_swima_state_create(TNC_ConnectionID connection_id)
+{
+	private_imv_swima_state_t *this;
+
+	INIT(this,
+		.public = {
+			.interface = {
+				.get_connection_id = _get_connection_id,
+				.has_long = _has_long,
+				.has_excl = _has_excl,
+				.set_flags = _set_flags,
+				.set_max_msg_len = _set_max_msg_len,
+				.get_max_msg_len = _get_max_msg_len,
+				.set_action_flags = _set_action_flags,
+				.get_action_flags = _get_action_flags,
+				.set_session = _set_session,
+				.get_session= _get_session,
+				.get_contracts = _get_contracts,
+				.change_state = _change_state,
+				.get_recommendation = _get_recommendation,
+				.set_recommendation = _set_recommendation,
+				.update_recommendation = _update_recommendation,
+				.get_reason_string = _get_reason_string,
+				.get_remediation_instructions = _get_remediation_instructions,
+				.destroy = _destroy,
+			},
+			.set_handshake_state = _set_handshake_state,
+			.get_handshake_state = _get_handshake_state,
+			.set_request_id = _set_request_id,
+			.get_request_id = _get_request_id,
+			.set_inventory = _set_inventory,
+			.get_inventory = _get_inventory,
+			.set_events = _set_events,
+			.get_events = _get_events,
+			.set_missing = _set_missing,
+			.get_missing = _get_missing,
+			.set_count = _set_count,
+			.get_count = _get_count,
+			.get_imc_id = _get_imc_id,
+		},
+		.state = TNC_CONNECTION_STATE_CREATE,
+		.rec = TNC_IMV_ACTION_RECOMMENDATION_NO_RECOMMENDATION,
+		.eval = TNC_IMV_EVALUATION_RESULT_DONT_KNOW,
+		.connection_id = connection_id,
+		.contracts = seg_contract_manager_create(),
+		.imc_id = TNC_IMCID_ANY,
+		.jobj = json_object_new_object(),
+		.jarray = json_object_new_array(),
+	);
+
+	json_object_object_add(this->jobj, "data", this->jarray);
+
+	return &this->public.interface;
+}
+
+
diff --git a/src/libimcv/plugins/imv_swima/imv_swima_state.h b/src/libimcv/plugins/imv_swima/imv_swima_state.h
new file mode 100644
index 000000000..beade6c9b
--- /dev/null
+++ b/src/libimcv/plugins/imv_swima/imv_swima_state.h
@@ -0,0 +1,160 @@
+/*
+ * Copyright (C) 2017 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.
+ */
+
+/**
+ * @defgroup imv_swima imv_swima
+ * @ingroup libimcv_plugins
+ *
+ * @defgroup imv_swima_state_t imv_swima_state
+ * @{ @ingroup imv_swima
+ */
+
+#ifndef IMV_SWIMA_STATE_H_
+#define IMV_SWIMA_STATE_H_
+
+#include <imv/imv_state.h>
+#include <swima/swima_inventory.h>
+#include <swima/swima_events.h>
+#include <library.h>
+
+#include <json.h>
+
+typedef struct imv_swima_state_t imv_swima_state_t;
+typedef enum imv_swima_handshake_state_t imv_swima_handshake_state_t;
+
+/**
+ * IMV OS Handshake States (state machine)
+ */
+enum imv_swima_handshake_state_t {
+	IMV_SWIMA_STATE_INIT,
+	IMV_SWIMA_STATE_WORKITEMS,
+	IMV_SWIMA_STATE_END
+};
+
+/**
+ * Internal state of an imv_swima_t connection instance
+ */
+struct imv_swima_state_t {
+
+	/**
+	 * imv_state_t interface
+	 */
+	imv_state_t interface;
+
+	/**
+	 * Set state of the handshake
+	 *
+	 * @param new_state			the handshake state of IMV
+	 */
+	void (*set_handshake_state)(imv_swima_state_t *this,
+								imv_swima_handshake_state_t new_state);
+
+	/**
+	 * Get state of the handshake
+	 *
+	 * @return					the handshake state of IMV
+	 */
+	imv_swima_handshake_state_t (*get_handshake_state)(imv_swima_state_t *this);
+
+	/**
+	 * Set the SWID request ID
+	 *
+	 * @param request_id		SWID request ID to be set
+	 */
+	void (*set_request_id)(imv_swima_state_t *this, uint32_t request_id);
+
+	/**
+	 * Get the SWID request ID
+	 *
+	 * @return					SWID request ID
+	 */
+	uint32_t (*get_request_id)(imv_swima_state_t *this);
+
+	/**
+	 * Set or extend the SWID Tag ID inventory in the state
+	 *
+	 * @param inventory			SWID Tags ID inventory to be added
+	 */
+	void (*set_inventory)(imv_swima_state_t *this, swima_inventory_t *inventory);
+
+	/**
+	 * Get the encoding of the complete SWID Tag ID inventory
+	 *
+	 * @return			       SWID Tags ID inventory as a JSON array
+	 */
+	json_object* (*get_inventory)(imv_swima_state_t *this);
+
+	/**
+	 * Set or extend the SWID Tag ID Events in the state
+	 *
+	 * @param inventory			SWID Tags ID inventory to be added
+	 */
+	void (*set_events)(imv_swima_state_t *this, swima_events_t *events);
+
+	/**
+	 * Get the encoding of the complete Software ID Events
+	 *
+	 * @return			       Software ID events as a JSON array
+	 */
+	json_object* (*get_events)(imv_swima_state_t *this);
+
+	/**
+	 * Set the number of still missing SW [ID] records or envents
+	 *
+	 * @param count				Number of missing SW [ID] records or envents
+	 */
+	void (*set_missing)(imv_swima_state_t *this, uint32_t count);
+
+	/**
+	 * Get the number of still missing SWID Tags or Tag IDs
+	 *
+	 * @result					Number of missing SWID Tags or Tag IDs
+	 */
+	uint32_t (*get_missing)(imv_swima_state_t *this);
+
+	/**
+	 * Set [or with multiple attributes increment] SWID Tag [ID] counters
+	 *
+	 * @param tag_id_count		Number of received SWID Tag IDs
+	 * @param tag_count			Number of received SWID Tags
+	 * @param imc_id			SWID IMC ID
+	 */
+	void (*set_count)(imv_swima_state_t *this, int tag_id_count, int tag_count,
+					  TNC_UInt32 imc_id);
+
+	/**
+	 * Set [or with multiple attributes increment] SWID Tag [ID] counters
+	 *
+	 * @param tag_id_count		Number of received SWID Tag IDs
+	 * @param tag_count			Number of received SWID Tags
+	 */
+	void (*get_count)(imv_swima_state_t *this, int *tag_id_count, int *tag_count);
+
+	/**
+	 * Get SWID IMC ID
+	 *
+	 * @return					SWID IMC ID
+	 */
+	TNC_UInt32 (*get_imc_id)(imv_swima_state_t *this);
+};
+
+/**
+ * Create an imv_swima_state_t instance
+ *
+ * @param id			connection ID
+ */
+imv_state_t* imv_swima_state_create(TNC_ConnectionID id);
+
+#endif /** IMV_SWIMA_STATE_H_ @}*/