[Assignment-7] add SGX sample code from VM

Assignment 7 - SGX Hands-on/SGX101_sample_code-master/ProcessLocalAttestation/Enclave2/Include/dh_session_protocol.h

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+/*
+ * Copyright (C) 2011-2018 Intel Corporation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ *   * Redistributions of source code must retain the above copyright
+ *     notice, this list of conditions and the following disclaimer.
+ *   * Redistributions in binary form must reproduce the above copyright
+ *     notice, this list of conditions and the following disclaimer in
+ *     the documentation and/or other materials provided with the
+ *     distribution.
+ *   * Neither the name of Intel Corporation nor the names of its
+ *     contributors may be used to endorse or promote products derived
+ *     from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef _DH_SESSION_PROROCOL_H
+#define _DH_SESSION_PROROCOL_H
+
+#include "sgx_ecp_types.h"
+#include "sgx_key.h"
+#include "sgx_report.h"
+#include "sgx_attributes.h"
+
+#define NONCE_SIZE         16
+#define MAC_SIZE           16
+
+#define MSG_BUF_LEN        sizeof(ec_pub_t)*2
+#define MSG_HASH_SZ        32
+
+
+//Session information structure
+typedef struct _la_dh_session_t
+{
+    uint32_t  session_id; //Identifies the current session
+    uint32_t  status; //Indicates session is in progress, active or closed
+    union
+    {
+        struct
+        {
+			sgx_dh_session_t dh_session;
+        }in_progress;
+
+        struct
+        {
+            sgx_key_128bit_t AEK; //Session Key
+            uint32_t counter; //Used to store Message Sequence Number
+        }active;
+    };
+} dh_session_t;
+
+
+#endif