Implemented handling of DH Parameters Response and Finish attributes

Implemented calculating session secrets

src/libimcv/plugins/imc_attestation/imc_attestation.c

@@ -67,6 +67,12 @@ static linked_list_t *evidences = NULL;
  */
 static pts_dh_group_t supported_dh_groups = 0;
 
+/**
+ * High Entropy Random Data
+ * used in calculation of shared secret for the assessment session
+ */
+static chunk_t responder_nonce;
+
 /**
  * see section 3.7.1 of TCG TNC IF-IMC Specification 1.2
  */

src/libimcv/plugins/imv_attestation/imv_attestation.c

@@ -62,6 +62,12 @@ static pts_dh_group_t supported_dh_groups = PTS_DH_GROUP_NONE;
  */
 static pts_dh_group_t supported_dh_groups = 0;
 
+/**
+ * High Entropy Random Data
+ * used in calculation of shared secret for the assessment session
+ */
+static chunk_t initiator_nonce;
+
 /**
  * PTS file measurement database
  */
@@ -77,6 +83,11 @@ static pts_creds_t *pts_creds;
  */
 static credential_manager_t *pts_credmgr;
 
+/**
+ * TRUE if DH Nonce Parameters Request attribute is sent
+ */
+static bool dh_nonce_req_sent = FALSE;
+
 /**
  * see section 3.7.1 of TCG TNC IF-IMV Specification 1.2
  */
@@ -474,6 +485,7 @@ TNC_Result TNC_IMV_Terminate(TNC_IMVID imv_id)
 	}
 	DESTROY_IF(pts_db);
 	DESTROY_IF(pts_credmgr);
+	free(initiator_nonce.ptr);
 
 	libpts_deinit();