Imported Upstream version 4.6.4

1 files changed, 358 insertions, 0 deletions

diff --git a/src/libpts/plugins/imc_attestation/imc_attestation.c b/src/libpts/plugins/imc_attestation/imc_attestation.c
new file mode 100644
index 000000000..4f77ba093
--- /dev/null
+++ b/src/libpts/plugins/imc_attestation/imc_attestation.c
@@ -0,0 +1,358 @@
+/*
+ * Copyright (C) 2011 Sansar Choinyambuu
+ * 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_attestation_state.h"
+#include "imc_attestation_process.h"
+
+#include <imc/imc_agent.h>
+#include <pa_tnc/pa_tnc_msg.h>
+#include <ietf/ietf_attr.h>
+#include <ietf/ietf_attr_pa_tnc_error.h>
+#include <ietf/ietf_attr_product_info.h>
+
+#include <libpts.h>
+
+#include <pts/pts_error.h>
+
+#include <tcg/tcg_pts_attr_proto_caps.h>
+#include <tcg/tcg_pts_attr_meas_algo.h>
+
+#include <tncif_pa_subtypes.h>
+
+#include <pen/pen.h>
+#include <debug.h>
+#include <utils/linked_list.h>
+
+/* IMC definitions */
+
+static const char imc_name[] = "Attestation";
+
+#define IMC_VENDOR_ID				PEN_TCG
+#define IMC_SUBTYPE					PA_SUBTYPE_TCG_PTS
+
+static imc_agent_t *imc_attestation;
+
+/**
+ * Supported PTS measurement algorithms
+ */
+static pts_meas_algorithms_t supported_algorithms = PTS_MEAS_ALGO_NONE;
+
+/**
+ * Supported PTS Diffie Hellman Groups
+ */
+static pts_dh_group_t supported_dh_groups = PTS_DH_GROUP_NONE;
+
+/**
+ * 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_attestation)
+	{
+		DBG1(DBG_IMC, "IMC \"%s\" has already been initialized", imc_name);
+		return TNC_RESULT_ALREADY_INITIALIZED;
+	}
+	if (!pts_meas_algo_probe(&supported_algorithms) ||
+		!pts_dh_group_probe(&supported_dh_groups))
+	{
+		return TNC_RESULT_FATAL;
+	}
+	imc_attestation = imc_agent_create(imc_name, IMC_VENDOR_ID, IMC_SUBTYPE,
+									   imc_id, actual_version);
+	if (!imc_attestation)
+	{
+		return TNC_RESULT_FATAL;
+	}
+
+	libpts_init();
+	
+	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_attestation)
+	{
+		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_attestation_state_create(connection_id);
+			return imc_attestation->create_state(imc_attestation, state);
+		case TNC_CONNECTION_STATE_DELETE:
+			return imc_attestation->delete_state(imc_attestation, connection_id);
+		case TNC_CONNECTION_STATE_HANDSHAKE:
+		case TNC_CONNECTION_STATE_ACCESS_ISOLATED:
+		case TNC_CONNECTION_STATE_ACCESS_NONE:
+		default:
+			return imc_attestation->change_state(imc_attestation, 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_attestation_state_t *attestation_state;
+	pts_t *pts;
+	char *platform_info;
+	TNC_Result result = TNC_RESULT_SUCCESS;
+
+	if (!imc_attestation)
+	{
+		DBG1(DBG_IMC, "IMC \"%s\" has not been initialized", imc_name);
+		return TNC_RESULT_NOT_INITIALIZED;
+	}
+
+	/* get current IMC state */
+	if (!imc_attestation->get_state(imc_attestation, connection_id, &state))
+	{
+		return TNC_RESULT_FATAL;
+	}
+	attestation_state = (imc_attestation_state_t*)state;
+	pts = attestation_state->get_pts(attestation_state);
+
+	platform_info = pts->get_platform_info(pts);
+	if (platform_info)
+	{
+		pa_tnc_msg_t *pa_tnc_msg;
+		pa_tnc_attr_t *attr;
+
+		pa_tnc_msg = pa_tnc_msg_create();
+		attr = ietf_attr_product_info_create(0, 0, platform_info);
+		pa_tnc_msg->add_attribute(pa_tnc_msg, attr);
+		pa_tnc_msg->build(pa_tnc_msg);
+		result = imc_attestation->send_message(imc_attestation, connection_id,
+										FALSE, 0, TNC_IMVID_ANY,
+										pa_tnc_msg->get_encoding(pa_tnc_msg));
+		pa_tnc_msg->destroy(pa_tnc_msg);
+	}
+
+	return result;
+}
+
+static TNC_Result receive_message(TNC_IMCID imc_id,
+								  TNC_ConnectionID connection_id,
+								  TNC_UInt32 msg_flags,
+								  chunk_t msg,
+								  TNC_VendorID msg_vid,
+								  TNC_MessageSubtype msg_subtype,
+								  TNC_UInt32 src_imv_id,
+								  TNC_UInt32 dst_imc_id)
+{
+	pa_tnc_msg_t *pa_tnc_msg;
+	pa_tnc_attr_t *attr;
+	linked_list_t *attr_list;
+	imc_state_t *state;
+	imc_attestation_state_t *attestation_state;
+	enumerator_t *enumerator;
+	TNC_Result result;
+
+	if (!imc_attestation)
+	{
+		DBG1(DBG_IMC, "IMC \"%s\" has not been initialized", imc_name);
+		return TNC_RESULT_NOT_INITIALIZED;
+	}
+
+	/* get current IMC state */
+	if (!imc_attestation->get_state(imc_attestation, connection_id, &state))
+	{
+		return TNC_RESULT_FATAL;
+	}
+	attestation_state = (imc_attestation_state_t*)state;
+
+	/* parse received PA-TNC message and automatically handle any errors */
+	result = imc_attestation->receive_message(imc_attestation, state, msg,
+					msg_vid, msg_subtype, src_imv_id, dst_imc_id, &pa_tnc_msg);
+
+	/* no parsed PA-TNC attributes available if an error occurred */
+	if (!pa_tnc_msg)
+	{
+		return result;
+	}
+	
+	/* preprocess any IETF standard error attributes */
+	result = pa_tnc_msg->process_ietf_std_errors(pa_tnc_msg) ?
+					TNC_RESULT_FATAL : TNC_RESULT_SUCCESS;
+
+	attr_list = linked_list_create();
+
+	/* analyze PA-TNC attributes */
+	enumerator = pa_tnc_msg->create_attribute_enumerator(pa_tnc_msg);
+	while (enumerator->enumerate(enumerator, &attr))
+	{
+		if (attr->get_vendor_id(attr) == PEN_IETF &&
+			attr->get_type(attr) == IETF_ATTR_PA_TNC_ERROR)
+		{
+			ietf_attr_pa_tnc_error_t *error_attr;
+			pen_t error_vendor_id;
+			pa_tnc_error_code_t error_code;
+			chunk_t msg_info;
+
+			error_attr = (ietf_attr_pa_tnc_error_t*)attr;
+			error_vendor_id = error_attr->get_vendor_id(error_attr);
+
+			if (error_vendor_id == PEN_TCG)
+			{
+				error_code = error_attr->get_error_code(error_attr);
+				msg_info = error_attr->get_msg_info(error_attr);
+
+				DBG1(DBG_IMC, "received TCG-PTS error '%N'",
+					 pts_error_code_names, error_code);
+				DBG1(DBG_IMC, "error information: %B", &msg_info);
+
+				result = TNC_RESULT_FATAL;
+			}
+		}
+		else if (attr->get_vendor_id(attr) == PEN_TCG)
+		{
+			if (!imc_attestation_process(attr, attr_list, attestation_state,
+				supported_algorithms, supported_dh_groups))
+			{
+				result = TNC_RESULT_FATAL;
+				break;
+			}
+		}
+	}
+	enumerator->destroy(enumerator);
+	pa_tnc_msg->destroy(pa_tnc_msg);
+
+	if (result == TNC_RESULT_SUCCESS && attr_list->get_count(attr_list))
+	{
+		pa_tnc_msg = pa_tnc_msg_create();
+
+		enumerator = attr_list->create_enumerator(attr_list);
+		while (enumerator->enumerate(enumerator, &attr))
+		{
+			pa_tnc_msg->add_attribute(pa_tnc_msg, attr);
+		}
+		enumerator->destroy(enumerator);
+
+		pa_tnc_msg->build(pa_tnc_msg);
+		result = imc_attestation->send_message(imc_attestation, connection_id,
+										FALSE, 0, TNC_IMVID_ANY,
+										pa_tnc_msg->get_encoding(pa_tnc_msg));
+		pa_tnc_msg->destroy(pa_tnc_msg);
+	}
+
+	attr_list->destroy(attr_list);
+	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)
+{
+	TNC_VendorID msg_vid;
+	TNC_MessageSubtype msg_subtype;
+
+	msg_vid = msg_type >> 8;
+	msg_subtype = msg_type & TNC_SUBTYPE_ANY;
+
+	return receive_message(imc_id, connection_id, 0, chunk_create(msg, msg_len),
+						   msg_vid,	msg_subtype, 0, TNC_IMCID_ANY);
+}
+
+/**
+ * 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)
+{
+	return receive_message(imc_id, connection_id, msg_flags,
+						   chunk_create(msg, msg_len), msg_vid, msg_subtype,
+						   src_imv_id, dst_imc_id);
+}
+
+/**
+ * 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_attestation)
+	{
+		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_attestation)
+	{
+		DBG1(DBG_IMC, "IMC \"%s\" has not been initialized", imc_name);
+		return TNC_RESULT_NOT_INITIALIZED;
+	}
+
+	libpts_deinit();
+
+	imc_attestation->destroy(imc_attestation);
+	imc_attestation = 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_attestation)
+	{
+		DBG1(DBG_IMC, "IMC \"%s\" has not been initialized", imc_name);
+		return TNC_RESULT_NOT_INITIALIZED;
+	}
+	return imc_attestation->bind_functions(imc_attestation, bind_function);
+}