60 lines
1.7 KiB
C
60 lines
1.7 KiB
C
/* sha.h
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*
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* The sha1 and sha256 hash functions.
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*/
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/* nettle, low-level cryptographics library
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*
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* Copyright (C) 2001 Niels Möller
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*
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* The nettle library is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation; either version 2.1 of the License, or (at your
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* option) any later version.
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*
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* The nettle library is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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* License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with the nettle library; see the file COPYING.LIB. If not, write to
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* the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
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* MA 02111-1307, USA.
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*/
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#ifndef NETTLE_SHA_H_INCLUDED
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#define NETTLE_SHA_H_INCLUDED
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/* SHA256 */
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#define SHA256_DIGEST_SIZE 32
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#define SHA256_DATA_SIZE 64
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/* Digest is kept internally as 8 32-bit words. */
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#define _SHA256_DIGEST_LENGTH 8
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typedef struct sha256_ctx
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{
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mutils_word32 state[_SHA256_DIGEST_LENGTH]; /* State variables */
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mutils_word32 count_low, count_high; /* 64-bit block count */
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mutils_word8 block[SHA256_DATA_SIZE]; /* SHA256 data buffer */
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mutils_word32 index; /* index into buffer */
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} SHA256_CTX;
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void
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sha256_init(struct sha256_ctx *ctx);
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void
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sha256_update(struct sha256_ctx *ctx, __const mutils_word8 *data, mutils_word32 length);
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void
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sha256_final(struct sha256_ctx *ctx);
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void
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sha256_digest(__const struct sha256_ctx *ctx, mutils_word8 *digest);
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#endif /* NETTLE_SHA_H_INCLUDED */
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