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/*
* SHA2-256 implementation based on FIPS180-2.
*
* Copyright (c) 2009 Marko Kreen
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#ifndef _USUAL_CRYPTO_SHA256_H_
#define _USUAL_CRYPTO_SHA256_H_
#include <usual/base.h>
#define SHA224_BLOCK_SIZE (16*4)
#define SHA256_BLOCK_SIZE (16*4)
#define SHA224_DIGEST_LENGTH (224/8)
#define SHA256_DIGEST_LENGTH (256/8)
struct sha256_ctx {
union {
uint32_t words[16];
uint8_t raw[16 * 4];
} buf;
uint32_t state[8];
uint64_t nbytes;
};
void sha256_reset(struct sha256_ctx *ctx);
void sha256_update(struct sha256_ctx *ctx, const void *data, unsigned int len);
void sha256_final(struct sha256_ctx *ctx, uint8_t *dst);
void sha224_reset(struct sha256_ctx *ctx);
void sha224_update(struct sha256_ctx *ctx, const void *data, unsigned int len);
void sha224_final(struct sha256_ctx *ctx, uint8_t *dst);
#endif
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