Backup 1

trial1/layer1.c

@@ -53,7 +53,7 @@ int readUDS(uint8_t* UDS_M)
 	if(!fp)
 		perror("Opening seed file to read failed\n");
 	
-	if (BIO_read(fp,UDSbuf,UDSsize) < 0)
+	if (BIO_read(fp,UDSbuf,UDSsize) < 0)		//Suspecting a ENDian issue in reading. data is half byte reversed
 		perror("BIO read failed\n");
 
 	//Compute hash of UDS
@@ -171,6 +171,15 @@ int calcCDID(uint8_t * UDS_M, uint8_t * FW_M, uint8_t * CDID)
 int _calcCDID(uint8_t * _CDID)
 {
 
+	/* 
+	***BUG*** : 
+	CDI hash value returned is not correct or consistent.
+	hash generated by readUDS() and readFWID() are correct and consistent but 
+	caclCDID() is broken. 
+
+	Do not use this wrapper function unless fixed
+	*/
+
 	BIO * out = BIO_new_fp(stdout, BIO_NOCLOSE);
 	BIO_printf(out, "\n");BIO_printf(out, "\n");BIO_printf(out, "\n");
 

trial1/layer1.h

@@ -4,12 +4,18 @@
 #include <openssl/bio.h>
 #include <openssl/err.h>
 #include <openssl/sha.h>
+#include <openssl/ec.h>
+#include <openssl/pem.h>
+#include <openssl/kdf.h>
+
 
 #define SHA256_dig_t 32	//bytes
+#define ECC_curve 
 
 int readUDS(uint8_t* UDSdigest);
 int createUDS();
 int readFWID(uint8_t * FW_M);
 int calcCDID(uint8_t * UDS_M, uint8_t * FW_M, uint8_t * CDID);
-int _calcCDID(uint8_t * CDID);
+int _calcCDID(uint8_t * CDID);		//wrapper function broken, do not use
+
 

trial1/layer2.c

@@ -25,16 +25,19 @@ void startProtocol()
 	//setp 3 : Derive Composite Device ID
 	uint8_t* CD_ID = calloc(1,sizeof(uint8_t)*SHA256_dig_t);
 	calcCDID(UDS_ID,FW_ID,CD_ID);
+	free(UDS_ID);
+	free(FW_ID);
+
+	// uint8_t* _CD_ID = calloc(1,sizeof(uint8_t)*SHA256_dig_t);
+	// _calcCDID(_CD_ID);
+	
 	
 
-	uint8_t* _CD_ID = calloc(1,sizeof(uint8_t)*SHA256_dig_t);
-	_calcCDID(_CD_ID);
 
 
 	//End block
-	free(UDS_ID);
-	free(FW_ID);
+	
 	free(CD_ID);
-	free(_CD_ID);
+	// free(_CD_ID);
 }
 

trial1/layer2.h

@@ -11,3 +11,6 @@
 #define SHA256_dig_t 32	//bytes
 
 void startProtocol();
+
+int deriveKDF();
+int deriveECC_Key();