Implemented Quote Digest constructing function for IMV

Implemented Signature verification function to check TPM Quote Signature
Implemented Handling of Simple Evidence Final attribute
Fixed bug within tpm_quote function

src/libpts/pts/pts.c

@@ -27,10 +27,6 @@
 #include <sys/utsname.h>
 #include <errno.h>
 
-#include <openssl/asn1t.h>
-#include <openssl/x509.h>
-#include <openssl/rsa.h>
-
 #define PTS_BUF_SIZE	4096
 
 typedef struct private_pts_t private_pts_t;

src/libpts/pts/pts.h

@@ -388,6 +388,23 @@ struct pts_t {
 	 bool (*quote_tpm)(pts_t *this, u_int32_t *pcrs, u_int32_t num_of_pcrs,
 					   chunk_t *pcr_composite, chunk_t *quote_signature);
 
+	 /**
+	 * Constructs and returns PCR Quote Digest structure expected from IMC
+	 * 
+	 * @param digest			Output variable to store quote digest
+	 * @return					FALSE in case of any error, TRUE otherwise
+	 */
+	 bool (*get_quote_digest)(pts_t *this, chunk_t *digest);
+
+	 /**
+	 * Constructs and returns PCR Quote Digest structure expected from IMC
+	 *
+	 * @param data				Calculated TPM Quote Digest
+	 * @param signature			TPM Quote Signature received from IMC
+	 * @return					FALSE in case signature is not verified, TRUE otherwise
+	 */
+	 bool (*verify_quote_signature)(pts_t *this, chunk_t data, chunk_t signature);
+
 	/**
 	 * Destroys a pts_t object.
 	 */