446 lines
12 KiB
C
446 lines
12 KiB
C
/* $OpenBSD: sha256.c,v 1.15 2023/03/29 05:34:01 jsing Exp $ */
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/* ====================================================================
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* Copyright (c) 1998-2011 The OpenSSL Project. 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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*
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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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*
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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
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* 3. All advertising materials mentioning features or use of this
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* software must display the following acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
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*
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* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
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* endorse or promote products derived from this software without
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* prior written permission. For written permission, please contact
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* openssl-core@openssl.org.
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*
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* 5. Products derived from this software may not be called "OpenSSL"
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* nor may "OpenSSL" appear in their names without prior written
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* permission of the OpenSSL Project.
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*
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* 6. Redistributions of any form whatsoever must retain the following
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* acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit (http://www.openssl.org/)"
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*
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* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
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* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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* ====================================================================
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*
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* This product includes cryptographic software written by Eric Young
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* (eay@cryptsoft.com). This product includes software written by Tim
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* Hudson (tjh@cryptsoft.com).
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*/
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#include <openssl/opensslconf.h>
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#if !defined(OPENSSL_NO_SHA) && !defined(OPENSSL_NO_SHA256)
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#include <endian.h>
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#include <stdlib.h>
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#include <string.h>
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#include <openssl/crypto.h>
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#include <openssl/sha.h>
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#include <openssl/opensslv.h>
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int
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SHA224_Init(SHA256_CTX *c)
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{
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memset (c, 0, sizeof(*c));
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c->h[0] = 0xc1059ed8UL;
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c->h[1] = 0x367cd507UL;
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c->h[2] = 0x3070dd17UL;
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c->h[3] = 0xf70e5939UL;
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c->h[4] = 0xffc00b31UL;
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c->h[5] = 0x68581511UL;
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c->h[6] = 0x64f98fa7UL;
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c->h[7] = 0xbefa4fa4UL;
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c->md_len = SHA224_DIGEST_LENGTH;
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return 1;
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}
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int
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SHA256_Init(SHA256_CTX *c)
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{
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memset (c, 0, sizeof(*c));
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c->h[0] = 0x6a09e667UL;
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c->h[1] = 0xbb67ae85UL;
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c->h[2] = 0x3c6ef372UL;
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c->h[3] = 0xa54ff53aUL;
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c->h[4] = 0x510e527fUL;
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c->h[5] = 0x9b05688cUL;
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c->h[6] = 0x1f83d9abUL;
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c->h[7] = 0x5be0cd19UL;
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c->md_len = SHA256_DIGEST_LENGTH;
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return 1;
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}
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unsigned char *
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SHA224(const unsigned char *d, size_t n, unsigned char *md)
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{
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SHA256_CTX c;
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static unsigned char m[SHA224_DIGEST_LENGTH];
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if (md == NULL)
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md = m;
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SHA224_Init(&c);
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SHA256_Update(&c, d, n);
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SHA256_Final(md, &c);
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explicit_bzero(&c, sizeof(c));
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return (md);
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}
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unsigned char *
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SHA256(const unsigned char *d, size_t n, unsigned char *md)
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{
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SHA256_CTX c;
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static unsigned char m[SHA256_DIGEST_LENGTH];
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if (md == NULL)
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md = m;
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SHA256_Init(&c);
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SHA256_Update(&c, d, n);
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SHA256_Final(md, &c);
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explicit_bzero(&c, sizeof(c));
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return (md);
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}
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int
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SHA224_Update(SHA256_CTX *c, const void *data, size_t len)
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{
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return SHA256_Update(c, data, len);
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}
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int
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SHA224_Final(unsigned char *md, SHA256_CTX *c)
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{
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return SHA256_Final(md, c);
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}
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#define DATA_ORDER_IS_BIG_ENDIAN
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#define HASH_LONG SHA_LONG
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#define HASH_CTX SHA256_CTX
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#define HASH_CBLOCK SHA_CBLOCK
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/*
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* Note that FIPS180-2 discusses "Truncation of the Hash Function Output."
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* default: case below covers for it. It's not clear however if it's
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* permitted to truncate to amount of bytes not divisible by 4. I bet not,
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* but if it is, then default: case shall be extended. For reference.
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* Idea behind separate cases for pre-defined lengths is to let the
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* compiler decide if it's appropriate to unroll small loops.
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*/
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#define HASH_MAKE_STRING(c, s) do { \
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unsigned long ll; \
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unsigned int nn; \
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switch ((c)->md_len) \
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{ case SHA224_DIGEST_LENGTH: \
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for (nn=0;nn<SHA224_DIGEST_LENGTH/4;nn++) \
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{ ll=(c)->h[nn]; HOST_l2c(ll,(s)); } \
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break; \
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case SHA256_DIGEST_LENGTH: \
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for (nn=0;nn<SHA256_DIGEST_LENGTH/4;nn++) \
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{ ll=(c)->h[nn]; HOST_l2c(ll,(s)); } \
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break; \
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default: \
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if ((c)->md_len > SHA256_DIGEST_LENGTH) \
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return 0; \
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for (nn=0;nn<(c)->md_len/4;nn++) \
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{ ll=(c)->h[nn]; HOST_l2c(ll,(s)); } \
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break; \
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} \
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} while (0)
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#define HASH_UPDATE SHA256_Update
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#define HASH_TRANSFORM SHA256_Transform
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#define HASH_FINAL SHA256_Final
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#define HASH_BLOCK_DATA_ORDER sha256_block_data_order
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#ifndef SHA256_ASM
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static
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#endif
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void sha256_block_data_order (SHA256_CTX *ctx, const void *in, size_t num);
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#include "md32_common.h"
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#ifndef SHA256_ASM
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static const SHA_LONG K256[64] = {
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0x428a2f98UL, 0x71374491UL, 0xb5c0fbcfUL, 0xe9b5dba5UL,
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0x3956c25bUL, 0x59f111f1UL, 0x923f82a4UL, 0xab1c5ed5UL,
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0xd807aa98UL, 0x12835b01UL, 0x243185beUL, 0x550c7dc3UL,
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0x72be5d74UL, 0x80deb1feUL, 0x9bdc06a7UL, 0xc19bf174UL,
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0xe49b69c1UL, 0xefbe4786UL, 0x0fc19dc6UL, 0x240ca1ccUL,
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0x2de92c6fUL, 0x4a7484aaUL, 0x5cb0a9dcUL, 0x76f988daUL,
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0x983e5152UL, 0xa831c66dUL, 0xb00327c8UL, 0xbf597fc7UL,
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0xc6e00bf3UL, 0xd5a79147UL, 0x06ca6351UL, 0x14292967UL,
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0x27b70a85UL, 0x2e1b2138UL, 0x4d2c6dfcUL, 0x53380d13UL,
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0x650a7354UL, 0x766a0abbUL, 0x81c2c92eUL, 0x92722c85UL,
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0xa2bfe8a1UL, 0xa81a664bUL, 0xc24b8b70UL, 0xc76c51a3UL,
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0xd192e819UL, 0xd6990624UL, 0xf40e3585UL, 0x106aa070UL,
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0x19a4c116UL, 0x1e376c08UL, 0x2748774cUL, 0x34b0bcb5UL,
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0x391c0cb3UL, 0x4ed8aa4aUL, 0x5b9cca4fUL, 0x682e6ff3UL,
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0x748f82eeUL, 0x78a5636fUL, 0x84c87814UL, 0x8cc70208UL,
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0x90befffaUL, 0xa4506cebUL, 0xbef9a3f7UL, 0xc67178f2UL,
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};
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/*
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* FIPS specification refers to right rotations, while our ROTATE macro
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* is left one. This is why you might notice that rotation coefficients
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* differ from those observed in FIPS document by 32-N...
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*/
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#define Sigma0(x) (ROTATE((x),30) ^ ROTATE((x),19) ^ ROTATE((x),10))
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#define Sigma1(x) (ROTATE((x),26) ^ ROTATE((x),21) ^ ROTATE((x),7))
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#define sigma0(x) (ROTATE((x),25) ^ ROTATE((x),14) ^ ((x)>>3))
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#define sigma1(x) (ROTATE((x),15) ^ ROTATE((x),13) ^ ((x)>>10))
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#define Ch(x, y, z) (((x) & (y)) ^ ((~(x)) & (z)))
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#define Maj(x, y, z) (((x) & (y)) ^ ((x) & (z)) ^ ((y) & (z)))
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#ifdef OPENSSL_SMALL_FOOTPRINT
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static void
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sha256_block_data_order(SHA256_CTX *ctx, const void *in, size_t num)
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{
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unsigned MD32_REG_T a, b, c, d, e, f, g, h, s0, s1, T1, T2;
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SHA_LONG X[16], l;
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int i;
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const unsigned char *data = in;
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while (num--) {
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a = ctx->h[0];
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b = ctx->h[1];
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c = ctx->h[2];
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d = ctx->h[3];
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e = ctx->h[4];
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f = ctx->h[5];
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g = ctx->h[6];
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h = ctx->h[7];
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for (i = 0; i < 16; i++) {
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HOST_c2l(data, l);
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T1 = X[i] = l;
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T1 += h + Sigma1(e) + Ch(e, f, g) + K256[i];
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T2 = Sigma0(a) + Maj(a, b, c);
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h = g;
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g = f;
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f = e;
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e = d + T1;
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d = c;
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c = b;
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b = a;
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a = T1 + T2;
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}
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for (; i < 64; i++) {
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s0 = X[(i + 1)&0x0f];
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s0 = sigma0(s0);
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s1 = X[(i + 14)&0x0f];
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s1 = sigma1(s1);
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T1 = X[i&0xf] += s0 + s1 + X[(i + 9)&0xf];
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T1 += h + Sigma1(e) + Ch(e, f, g) + K256[i];
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T2 = Sigma0(a) + Maj(a, b, c);
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h = g;
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g = f;
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f = e;
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e = d + T1;
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d = c;
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c = b;
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b = a;
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a = T1 + T2;
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}
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ctx->h[0] += a;
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ctx->h[1] += b;
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ctx->h[2] += c;
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ctx->h[3] += d;
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ctx->h[4] += e;
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ctx->h[5] += f;
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ctx->h[6] += g;
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ctx->h[7] += h;
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}
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}
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#else
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#define ROUND_00_15(i, a, b, c, d, e, f, g, h) do { \
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T1 += h + Sigma1(e) + Ch(e, f, g) + K256[i]; \
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h = Sigma0(a) + Maj(a, b, c); \
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d += T1; h += T1; } while (0)
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#define ROUND_16_63(i, a, b, c, d, e, f, g, h, X) do { \
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s0 = X[(i+1)&0x0f]; s0 = sigma0(s0); \
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s1 = X[(i+14)&0x0f]; s1 = sigma1(s1); \
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T1 = X[(i)&0x0f] += s0 + s1 + X[(i+9)&0x0f]; \
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ROUND_00_15(i, a, b, c, d, e, f, g, h); } while (0)
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static void
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sha256_block_data_order(SHA256_CTX *ctx, const void *in, size_t num)
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{
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unsigned MD32_REG_T a, b, c, d, e, f, g, h, s0, s1, T1;
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SHA_LONG X[16];
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int i;
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const unsigned char *data = in;
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while (num--) {
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a = ctx->h[0];
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b = ctx->h[1];
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c = ctx->h[2];
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d = ctx->h[3];
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e = ctx->h[4];
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f = ctx->h[5];
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g = ctx->h[6];
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h = ctx->h[7];
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if (BYTE_ORDER != LITTLE_ENDIAN &&
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sizeof(SHA_LONG) == 4 && ((size_t)in % 4) == 0) {
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const SHA_LONG *W = (const SHA_LONG *)data;
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T1 = X[0] = W[0];
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ROUND_00_15(0, a, b, c, d, e, f, g, h);
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T1 = X[1] = W[1];
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ROUND_00_15(1, h, a, b, c, d, e, f, g);
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T1 = X[2] = W[2];
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ROUND_00_15(2, g, h, a, b, c, d, e, f);
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T1 = X[3] = W[3];
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ROUND_00_15(3, f, g, h, a, b, c, d, e);
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T1 = X[4] = W[4];
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ROUND_00_15(4, e, f, g, h, a, b, c, d);
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T1 = X[5] = W[5];
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ROUND_00_15(5, d, e, f, g, h, a, b, c);
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T1 = X[6] = W[6];
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ROUND_00_15(6, c, d, e, f, g, h, a, b);
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T1 = X[7] = W[7];
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ROUND_00_15(7, b, c, d, e, f, g, h, a);
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T1 = X[8] = W[8];
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ROUND_00_15(8, a, b, c, d, e, f, g, h);
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T1 = X[9] = W[9];
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ROUND_00_15(9, h, a, b, c, d, e, f, g);
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T1 = X[10] = W[10];
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ROUND_00_15(10, g, h, a, b, c, d, e, f);
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T1 = X[11] = W[11];
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ROUND_00_15(11, f, g, h, a, b, c, d, e);
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T1 = X[12] = W[12];
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ROUND_00_15(12, e, f, g, h, a, b, c, d);
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T1 = X[13] = W[13];
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ROUND_00_15(13, d, e, f, g, h, a, b, c);
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T1 = X[14] = W[14];
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ROUND_00_15(14, c, d, e, f, g, h, a, b);
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T1 = X[15] = W[15];
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ROUND_00_15(15, b, c, d, e, f, g, h, a);
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data += SHA256_CBLOCK;
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} else {
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SHA_LONG l;
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HOST_c2l(data, l);
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T1 = X[0] = l;
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ROUND_00_15(0, a, b, c, d, e, f, g, h);
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HOST_c2l(data, l);
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T1 = X[1] = l;
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ROUND_00_15(1, h, a, b, c, d, e, f, g);
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HOST_c2l(data, l);
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T1 = X[2] = l;
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ROUND_00_15(2, g, h, a, b, c, d, e, f);
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HOST_c2l(data, l);
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T1 = X[3] = l;
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ROUND_00_15(3, f, g, h, a, b, c, d, e);
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HOST_c2l(data, l);
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T1 = X[4] = l;
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ROUND_00_15(4, e, f, g, h, a, b, c, d);
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HOST_c2l(data, l);
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T1 = X[5] = l;
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ROUND_00_15(5, d, e, f, g, h, a, b, c);
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HOST_c2l(data, l);
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T1 = X[6] = l;
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ROUND_00_15(6, c, d, e, f, g, h, a, b);
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HOST_c2l(data, l);
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T1 = X[7] = l;
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ROUND_00_15(7, b, c, d, e, f, g, h, a);
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HOST_c2l(data, l);
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T1 = X[8] = l;
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ROUND_00_15(8, a, b, c, d, e, f, g, h);
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HOST_c2l(data, l);
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T1 = X[9] = l;
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ROUND_00_15(9, h, a, b, c, d, e, f, g);
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HOST_c2l(data, l);
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T1 = X[10] = l;
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ROUND_00_15(10, g, h, a, b, c, d, e, f);
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HOST_c2l(data, l);
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T1 = X[11] = l;
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ROUND_00_15(11, f, g, h, a, b, c, d, e);
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HOST_c2l(data, l);
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T1 = X[12] = l;
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ROUND_00_15(12, e, f, g, h, a, b, c, d);
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HOST_c2l(data, l);
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T1 = X[13] = l;
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ROUND_00_15(13, d, e, f, g, h, a, b, c);
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HOST_c2l(data, l);
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T1 = X[14] = l;
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ROUND_00_15(14, c, d, e, f, g, h, a, b);
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HOST_c2l(data, l);
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T1 = X[15] = l;
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ROUND_00_15(15, b, c, d, e, f, g, h, a);
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}
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for (i = 16; i < 64; i += 8) {
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ROUND_16_63(i + 0, a, b, c, d, e, f, g, h, X);
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ROUND_16_63(i + 1, h, a, b, c, d, e, f, g, X);
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ROUND_16_63(i + 2, g, h, a, b, c, d, e, f, X);
|
|
ROUND_16_63(i + 3, f, g, h, a, b, c, d, e, X);
|
|
ROUND_16_63(i + 4, e, f, g, h, a, b, c, d, X);
|
|
ROUND_16_63(i + 5, d, e, f, g, h, a, b, c, X);
|
|
ROUND_16_63(i + 6, c, d, e, f, g, h, a, b, X);
|
|
ROUND_16_63(i + 7, b, c, d, e, f, g, h, a, X);
|
|
}
|
|
|
|
ctx->h[0] += a;
|
|
ctx->h[1] += b;
|
|
ctx->h[2] += c;
|
|
ctx->h[3] += d;
|
|
ctx->h[4] += e;
|
|
ctx->h[5] += f;
|
|
ctx->h[6] += g;
|
|
ctx->h[7] += h;
|
|
}
|
|
}
|
|
|
|
#endif
|
|
#endif /* SHA256_ASM */
|
|
|
|
#endif /* OPENSSL_NO_SHA256 */
|