Working model finished

include/rfc4226.h

@@ -0,0 +1,40 @@
+#ifndef RFC4226_H
+#define RFC4226_H
+
+
+#include <stdint.h>
+#include <stdlib.h>
+
+/*
+* Interface API for this library.
+*/
+
+uint32_t HOTP(uint8_t* key, size_t kl, uint64_t interval, int digits);
+
+/*
+* Step 1 -> Calling hmac function from openssl
+*			library. It is used to create a 160-bit
+*			integer value which is processed further.
+*			It take a string key as an argument and
+*			a seed value for calculation.
+*			->unsigned char* key -> key string
+*			->uint64_t interval -> seed value
+*				|
+*				|
+*				-------> This seed value can be integer counter or
+*						 timer value as an argument.
+*/
+
+uint8_t* hmac(unsigned char* key, int kl, uint64_t interval);
+
+
+/*
+*
+* Step 2 -> This function will truncate some bits to produce
+*			a binary sequence of 32-bit. The 160-bit binary
+*			sequence should in big-endian binary format for
+*			processing.
+*/
+
+uint32_t DT(uint8_t* rawData);
+#endif

include/rfc6238.h

@@ -0,0 +1,16 @@
+#ifndef RFC6238_H
+#define RFC6238_H
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+#include <time.h>
+
+
+#include "rfc4226.h"
+
+#define TS 30 /* time step in seconds, default value */
+
+uint32_t TOTP(uint8_t* key, size_t kl, uint64_t time, int digits);
+time_t get_time(time_t T0);
+#endif