1/*********************************************************************
2* Source: https://github.com/B-Con/crypto-algorithms
3* Filename: sha256.h
4* Author: Brad Conte (brad AT bradconte.com)
5* Copyright: This code is released into the public domain.
6* Disclaimer: This code is presented "as is" without any guarantees.
7* Details: Defines the API for the corresponding SHA1 implementation.
8*********************************************************************/
9
10#ifndef SHA256_H
11#define SHA256_H
12
13/*************************** HEADER FILES ***************************/
14#include <stddef.h>
15
16/****************************** MACROS ******************************/
17#define SHA256_BLOCK_SIZE 32 // SHA256 outputs a 32 byte digest
18
19/**************************** DATA TYPES ****************************/
20typedef unsigned char BYTE; // 8-bit byte
21typedef unsigned int WORD; // 32-bit word, change to "long" for 16-bit machines
22
23typedef struct {
24 BYTE data[64];
25 WORD datalen;
26 unsigned long long bitlen;
27 WORD state[8];
28} CRYAL_SHA256_CTX;
29
30/*********************** FUNCTION DECLARATIONS **********************/
31void sha256_init(CRYAL_SHA256_CTX *ctx);
32void sha256_update(CRYAL_SHA256_CTX *ctx, const BYTE data[], size_t len);
33void sha256_final(CRYAL_SHA256_CTX *ctx, BYTE hash[]);
34
35#endif // SHA256_H
36