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sha256.h
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/*
* Copyright (C) 2017 - This file is part of libecc project
*
* Authors:
* Ryad BENADJILA <[email protected]>
* Arnaud EBALARD <[email protected]>
* Jean-Pierre FLORI <[email protected]>
*
* Contributors:
* Nicolas VIVET <[email protected]>
* Karim KHALFALLAH <[email protected]>
*
* This software is licensed under a dual BSD and GPL v2 license.
* See LICENSE file at the root folder of the project.
*/
#include "../lib_ecc_config.h"
#ifdef WITH_HASH_SHA256
#ifndef __SHA256_H__
#define __SHA256_H__
#include "../words/words.h"
#include "../utils/utils.h"
#include "sha2.h"
#define SHA256_STATE_SIZE 8
#define SHA256_BLOCK_SIZE 64
#define SHA256_DIGEST_SIZE 32
#define SHA256_DIGEST_SIZE_BITS 256
/* Compute max hash digest and block sizes */
#ifndef MAX_DIGEST_SIZE
#define MAX_DIGEST_SIZE 0
#endif
#if (MAX_DIGEST_SIZE < SHA256_DIGEST_SIZE)
#undef MAX_DIGEST_SIZE
#define MAX_DIGEST_SIZE SHA256_DIGEST_SIZE
#endif
#ifndef MAX_DIGEST_SIZE_BITS
#define MAX_DIGEST_SIZE_BITS 0
#endif
#if (MAX_DIGEST_SIZE_BITS < SHA256_DIGEST_SIZE_BITS)
#undef MAX_DIGEST_SIZE_BITS
#define MAX_DIGEST_SIZE_BITS SHA256_DIGEST_SIZE_BITS
#endif
#ifndef MAX_BLOCK_SIZE
#define MAX_BLOCK_SIZE 0
#endif
#if (MAX_BLOCK_SIZE < SHA256_BLOCK_SIZE)
#undef MAX_BLOCK_SIZE
#define MAX_BLOCK_SIZE SHA256_BLOCK_SIZE
#endif
#define SHA256_HASH_MAGIC ((word_t)(0x11299a2b32098412ULL))
#define SHA256_HASH_CHECK_INITIALIZED(A, ret, err) \
MUST_HAVE((((void *)(A)) != NULL) && ((A)->magic == SHA256_HASH_MAGIC), ret, err)
typedef struct {
/* Number of bytes processed */
u64 sha256_total;
/* Internal state */
u32 sha256_state[SHA256_STATE_SIZE];
/* Internal buffer to handle updates in a block */
u8 sha256_buffer[SHA256_BLOCK_SIZE];
/* Initialization magic value */
word_t magic;
} sha256_context;
ATTRIBUTE_WARN_UNUSED_RET int sha256_init(sha256_context *ctx);
ATTRIBUTE_WARN_UNUSED_RET int sha256_update(sha256_context *ctx, const u8 *input, u32 ilen);
ATTRIBUTE_WARN_UNUSED_RET int sha256_final(sha256_context *ctx, u8 output[SHA256_DIGEST_SIZE]);
ATTRIBUTE_WARN_UNUSED_RET int sha256_scattered(const u8 **inputs, const u32 *ilens,
u8 output[SHA256_DIGEST_SIZE]);
ATTRIBUTE_WARN_UNUSED_RET int sha256(const u8 *input, u32 ilen, u8 output[SHA256_DIGEST_SIZE]);
#endif /* __SHA256_H__ */
#endif /* WITH_HASH_SHA256 */