sha256.h

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/*********************************************************************
* Source:     https://github.com/B-Con/crypto-algorithms
* Filename:   sha256.h
* Author:     Brad Conte (brad AT bradconte.com)
* Copyright:
* Disclaimer: This code is presented "as is" without any guarantees.
* Details:    Defines the API for the corresponding SHA1 implementation.
*********************************************************************/
 
#ifndef SHA256_H
#define SHA256_H
 
/*************************** HEADER FILES ***************************/
#include <stddef.h>
#include <stdint.h>
 
/****************************** MACROS ******************************/
#define SHA256_BLOCK_SIZE 32            // SHA256 outputs a 32 byte digest
 
/**************************** DATA TYPES ****************************/
typedef uint8_t BYTE;
typedef uint32_t WORD;
 
typedef struct {
    BYTE data[64];
    WORD datalen;
    unsigned long long bitlen;
    WORD state[8];
} SHA256_CTX;
 
/*********************** FUNCTION DECLARATIONS **********************/
void sha256_init(SHA256_CTX *ctx);
void sha256_update(SHA256_CTX *ctx, const BYTE data[], size_t len);
void sha256_final(SHA256_CTX *ctx, BYTE hash[]);
 
 
void CRYPT_compute_sha256_hash(const uint8_t message[], size_t message_length, uint8_t hash[32]);
 
#endif   // SHA256_H