109 lines
3.2 KiB
C
109 lines
3.2 KiB
C
/* $OpenBSD: sha2.c,v 1.28 2019/07/23 12:35:22 dtucker Exp $ */
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/*
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* FILE: sha2.c
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* AUTHOR: Aaron D. Gifford <me@aarongifford.com>
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*
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* Copyright (c) 2000-2001, Aaron D. Gifford
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the copyright holder nor the names of contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTOR(S) ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTOR(S) BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $From: sha2.c,v 1.1 2001/11/08 00:01:51 adg Exp adg $
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*/
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#include <sys/types.h>
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#include <endian.h>
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#include <stdint.h>
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#include <string.h>
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#include "sha2.h"
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#define BE_32_TO_8(cp, src) do { \
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(cp)[0] = (src) >> 24; \
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(cp)[1] = (src) >> 16; \
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(cp)[2] = (src) >> 8; \
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(cp)[3] = (src); \
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} while (0)
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/*** SHA-XYZ INITIAL HASH VALUES AND CONSTANTS ************************/
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/* Initial hash value H for SHA-224: */
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static const uint32_t sha224_initial_hash_value[8] = {
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0xc1059ed8UL,
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0x367cd507UL,
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0x3070dd17UL,
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0xf70e5939UL,
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0xffc00b31UL,
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0x68581511UL,
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0x64f98fa7UL,
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0xbefa4fa4UL
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};
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/*** SHA-224: *********************************************************/
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void
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SHA224Init(SHA2_CTX *context)
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{
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memcpy(context->state.st32, sha224_initial_hash_value,
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sizeof(sha224_initial_hash_value));
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memset(context->buffer, 0, sizeof(context->buffer));
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context->bitcount[0] = 0;
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}
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void
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SHA224Transform(uint32_t state[8], const uint8_t data[SHA224_BLOCK_LENGTH])
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{
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SHA256Transform(state, data);
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}
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void
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SHA224Update(SHA2_CTX *context, const uint8_t *data, size_t len)
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{
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SHA256Update(context, data, len);
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}
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void
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SHA224Pad(SHA2_CTX *context)
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{
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SHA256Pad(context);
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}
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void
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SHA224Final(uint8_t digest[SHA224_DIGEST_LENGTH], SHA2_CTX *context)
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{
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SHA224Pad(context);
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#if BYTE_ORDER == LITTLE_ENDIAN
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int i;
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/* Convert TO host byte order */
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for (i = 0; i < 7; i++)
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BE_32_TO_8(digest + i * 4, context->state.st32[i]);
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#else
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memcpy(digest, context->state.st32, SHA224_DIGEST_LENGTH);
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#endif
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explicit_bzero(context, sizeof(*context));
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}
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