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Diffstat (limited to 'src/libimcv/plugins/imc_swid/imc_swid.c')
-rw-r--r--src/libimcv/plugins/imc_swid/imc_swid.c424
1 files changed, 424 insertions, 0 deletions
diff --git a/src/libimcv/plugins/imc_swid/imc_swid.c b/src/libimcv/plugins/imc_swid/imc_swid.c
new file mode 100644
index 000000000..40f352ad9
--- /dev/null
+++ b/src/libimcv/plugins/imc_swid/imc_swid.c
@@ -0,0 +1,424 @@
+/*
+ * Copyright (C) 2013-2014 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_swid_state.h"
+
+#include <imc/imc_agent.h>
+#include <imc/imc_msg.h>
+#include "tcg/seg/tcg_seg_attr_max_size.h"
+#include "tcg/seg/tcg_seg_attr_seg_env.h"
+#include "tcg/swid/tcg_swid_attr_req.h"
+#include "tcg/swid/tcg_swid_attr_tag_inv.h"
+#include "tcg/swid/tcg_swid_attr_tag_id_inv.h"
+#include "swid/swid_inventory.h"
+#include "swid/swid_error.h"
+
+#include <tncif_pa_subtypes.h>
+
+#include <pen/pen.h>
+#include <utils/debug.h>
+
+#define SWID_GENERATOR "/usr/local/bin/swid_generator"
+
+/* IMC definitions */
+
+static const char imc_name[] = "SWID";
+
+static pen_type_t msg_types[] = {
+ { PEN_TCG, PA_SUBTYPE_TCG_SWID }
+};
+
+static imc_agent_t *imc_swid;
+
+/**
+ * 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_swid)
+ {
+ DBG1(DBG_IMC, "IMC \"%s\" has already been initialized", imc_name);
+ return TNC_RESULT_ALREADY_INITIALIZED;
+ }
+ imc_swid = imc_agent_create(imc_name, msg_types, countof(msg_types),
+ imc_id, actual_version);
+ if (!imc_swid)
+ {
+ 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_swid)
+ {
+ 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_swid_state_create(connection_id);
+ return imc_swid->create_state(imc_swid, state);
+ case TNC_CONNECTION_STATE_HANDSHAKE:
+ if (imc_swid->change_state(imc_swid, 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_swid->delete_state(imc_swid, connection_id);
+ default:
+ return imc_swid->change_state(imc_swid, connection_id,
+ new_state, NULL);
+ }
+}
+
+/**
+ * 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;
+ pa_tnc_attr_t *attr;
+ seg_contract_t *contract;
+ seg_contract_manager_t *contracts;
+ size_t max_attr_size = SWID_MAX_ATTR_SIZE;
+ size_t max_seg_size;
+ char buf[BUF_LEN];
+ TNC_Result result = TNC_RESULT_SUCCESS;
+
+ if (!imc_swid)
+ {
+ DBG1(DBG_IMC, "IMC \"%s\" has not been initialized", imc_name);
+ return TNC_RESULT_NOT_INITIALIZED;
+ }
+ if (!imc_swid->get_state(imc_swid, connection_id, &state))
+ {
+ return TNC_RESULT_FATAL;
+ }
+
+ /* 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
+ - PA_TNC_ATTR_HEADER_SIZE
+ - TCG_SEG_ATTR_MAX_SIZE_SIZE;
+
+ /* Announce support of PA-TNC segmentation to IMV */
+ contract = seg_contract_create(msg_types[0], max_attr_size, max_seg_size,
+ TRUE, imc_id, TRUE);
+ contract->get_info_string(contract, buf, BUF_LEN, TRUE);
+ DBG2(DBG_IMC, "%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);
+
+ /* send PA-TNC message with the excl flag not set */
+ out_msg = imc_msg_create(imc_swid, state, connection_id, imc_id,
+ TNC_IMVID_ANY, msg_types[0]);
+ out_msg->add_attribute(out_msg, attr);
+ result = out_msg->send(out_msg, FALSE);
+ out_msg->destroy(out_msg);
+
+ return result;
+}
+
+/**
+ * Add one or multiple SWID Inventory attributes to the send queue
+ */
+static bool add_swid_inventory(imc_state_t *state, imc_msg_t *msg,
+ uint32_t request_id, bool full_tags,
+ swid_inventory_t *targets)
+{
+ pa_tnc_attr_t *attr, *attr_error;
+ imc_swid_state_t *swid_state;
+ swid_inventory_t *swid_inventory;
+ char *swid_directory, *swid_generator;
+ uint32_t eid_epoch;
+ bool swid_pretty, swid_full;
+ enumerator_t *enumerator;
+
+ swid_directory = lib->settings->get_str(lib->settings,
+ "%s.plugins.imc-swid.swid_directory",
+ SWID_DIRECTORY, lib->ns);
+ swid_generator = lib->settings->get_str(lib->settings,
+ "%s.plugins.imc-swid.swid_generator",
+ SWID_GENERATOR, lib->ns);
+ swid_pretty = lib->settings->get_bool(lib->settings,
+ "%s.plugins.imc-swid.swid_pretty",
+ FALSE, lib->ns);
+ swid_full = lib->settings->get_bool(lib->settings,
+ "%s.plugins.imc-swid.swid_full",
+ FALSE, lib->ns);
+
+ swid_inventory = swid_inventory_create(full_tags);
+ if (!swid_inventory->collect(swid_inventory, swid_directory, swid_generator,
+ targets, swid_pretty, swid_full))
+ {
+ swid_inventory->destroy(swid_inventory);
+ attr_error = swid_error_create(TCG_SWID_ERROR, request_id,
+ 0, "error in SWID tag collection");
+ msg->add_attribute(msg, attr_error);
+ return FALSE;
+ }
+ DBG1(DBG_IMC, "collected %d SWID tag%s%s",
+ swid_inventory->get_count(swid_inventory), full_tags ? "" : " ID",
+ swid_inventory->get_count(swid_inventory) == 1 ? "" : "s");
+
+ swid_state = (imc_swid_state_t*)state;
+ eid_epoch = swid_state->get_eid_epoch(swid_state);
+
+ if (full_tags)
+ {
+ tcg_swid_attr_tag_inv_t *swid_attr;
+ swid_tag_t *tag;
+
+ /* Send a TCG SWID Tag Inventory attribute */
+ attr = tcg_swid_attr_tag_inv_create(request_id, eid_epoch, 1);
+ swid_attr = (tcg_swid_attr_tag_inv_t*)attr;
+
+ enumerator = swid_inventory->create_enumerator(swid_inventory);
+ while (enumerator->enumerate(enumerator, &tag))
+ {
+ swid_attr->add(swid_attr, tag->get_ref(tag));
+ }
+ enumerator->destroy(enumerator);
+ }
+ else
+ {
+ tcg_swid_attr_tag_id_inv_t *swid_id_attr;
+ swid_tag_id_t *tag_id;
+
+ /* Send a TCG SWID Tag ID Inventory attribute */
+ attr = tcg_swid_attr_tag_id_inv_create(request_id, eid_epoch, 1);
+ swid_id_attr = (tcg_swid_attr_tag_id_inv_t*)attr;
+
+ enumerator = swid_inventory->create_enumerator(swid_inventory);
+ while (enumerator->enumerate(enumerator, &tag_id))
+ {
+ swid_id_attr->add(swid_id_attr, tag_id->get_ref(tag_id));
+ }
+ enumerator->destroy(enumerator);
+ }
+
+ msg->add_attribute(msg, attr);
+ swid_inventory->destroy(swid_inventory);
+
+ return TRUE;
+}
+
+static TNC_Result receive_message(imc_state_t *state, imc_msg_t *in_msg)
+{
+ imc_msg_t *out_msg;
+ pa_tnc_attr_t *attr;
+ enumerator_t *enumerator;
+ pen_type_t type;
+ TNC_Result result;
+ bool fatal_error = FALSE;
+
+ /* generate an outgoing PA-TNC message - we might need it */
+ out_msg = imc_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;
+ }
+
+ /* analyze PA-TNC attributes */
+ enumerator = in_msg->create_attribute_enumerator(in_msg);
+ while (enumerator->enumerate(enumerator, &attr))
+ {
+ tcg_swid_attr_req_t *attr_req;
+ uint8_t flags;
+ uint32_t request_id;
+ bool full_tags;
+ swid_inventory_t *targets;
+
+ type = attr->get_type(attr);
+
+ if (type.vendor_id != PEN_TCG || type.type != TCG_SWID_REQUEST)
+ {
+ continue;
+ }
+
+ attr_req = (tcg_swid_attr_req_t*)attr;
+ flags = attr_req->get_flags(attr_req);
+ request_id = attr_req->get_request_id(attr_req);
+ targets = attr_req->get_targets(attr_req);
+
+ if (flags & (TCG_SWID_ATTR_REQ_FLAG_S | TCG_SWID_ATTR_REQ_FLAG_C))
+ {
+ attr = swid_error_create(TCG_SWID_SUBSCRIPTION_DENIED, request_id,
+ 0, "no subscription available yet");
+ out_msg->add_attribute(out_msg, attr);
+ break;
+ }
+ full_tags = (flags & TCG_SWID_ATTR_REQ_FLAG_R) == 0;
+
+ if (!add_swid_inventory(state, out_msg, request_id, full_tags, targets))
+ {
+ break;
+ }
+ }
+ enumerator->destroy(enumerator);
+
+ if (fatal_error)
+ {
+ result = TNC_RESULT_FATAL;
+ }
+ else
+ {
+ /* send PA-TNC message with the EXCL flag set */
+ 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_swid)
+ {
+ DBG1(DBG_IMC, "IMC \"%s\" has not been initialized", imc_name);
+ return TNC_RESULT_NOT_INITIALIZED;
+ }
+ if (!imc_swid->get_state(imc_swid, connection_id, &state))
+ {
+ return TNC_RESULT_FATAL;
+ }
+ in_msg = imc_msg_create_from_data(imc_swid, 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_swid)
+ {
+ DBG1(DBG_IMC, "IMC \"%s\" has not been initialized", imc_name);
+ return TNC_RESULT_NOT_INITIALIZED;
+ }
+ if (!imc_swid->get_state(imc_swid, connection_id, &state))
+ {
+ return TNC_RESULT_FATAL;
+ }
+ in_msg = imc_msg_create_from_long_data(imc_swid, 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_swid)
+ {
+ 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_swid)
+ {
+ DBG1(DBG_IMC, "IMC \"%s\" has not been initialized", imc_name);
+ return TNC_RESULT_NOT_INITIALIZED;
+ }
+ imc_swid->destroy(imc_swid);
+ imc_swid = 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_swid)
+ {
+ DBG1(DBG_IMC, "IMC \"%s\" has not been initialized", imc_name);
+ return TNC_RESULT_NOT_INITIALIZED;
+ }
+ return imc_swid->bind_functions(imc_swid, bind_function);
+}