#include <stdint.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>

typedef struct sha256 
{

	uint32_t count [2];
	uint32_t state [8];
	uint8_t block [64];
	uint8_t extra [64];
	
}
SHA256;

#define SHA256_DIGEST_LENGTH 256/8
#define HPAVKEY_NMK_LEN 16
#define HPAVKEY_NID_LEN 7
#define SHR(word,bits) ((word & 0xFFFFFFFF) >> bits)
#define ROTR(word,bits) (SHR(word,bits) | (word << (32 - bits)))
#define DEFAULT_LEVEL 0
//-------------------------------------------------------------------------- 
/* Functions -----------------------------------------------------------*/
//-------------------------------------------------------------------------- 
void HPAVKeyNMK (uint8_t NMK [], const char * string); 
void HPAVKeyNID (uint8_t NID [], const uint8_t NMK [], uint8_t level);
void SHA256Reset (struct sha256 *sha256);
void SHA256Block (struct sha256 *sha256, void const *memory);
void SHA256Write (struct sha256 *sha256, void const *memory, uint16_t extent);
void SHAEncode(uint8_t memory [], uint32_t number);
void SHA256Fetch (struct sha256 *sha256, uint8_t digest []) ;