#ifndef _ROM_SHA256_H_
#define _ROM_SHA256_H_

/**
 * SHA-256 context structure
 */
typedef struct
{
    uint32_t total[2];          /*!< number of bytes processed  */
    uint32_t state[8];          /*!< intermediate digest state  */
    unsigned char buffer[64];   /*!< data block being processed */
}sha256_context;

void sha256_init( sha256_context *ctx );
void sha256_free( sha256_context *ctx );
void sha256_starts( sha256_context *ctx );
void sha256_update( sha256_context *ctx, const unsigned char *input,
                    unsigned int ilen );
void sha256_finish( sha256_context *ctx, unsigned char output[32] );


#endif