sha_locl.h

SHA-1Hash函数源码

/* crypto/sha/sha_locl.h */
/* Copyright (C) 1995-1998 Eric Young ([e-mail])
 * All rights reserved.
 *
 * This package is an SSL implementation written
 * by Eric Young ([e-mail]).
 * The implementation was written so as to conform with Netscapes SSL.
 * 
 * This library is free for commercial and non-commercial use as long as
 * the following conditions are aheared to.  The following conditions
 * apply to all code found in this distribution, be it the RC4, RSA,
 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
 * included with this distribution is covered by the same copyright terms
 * except that the holder is Tim Hudson ([e-mail]).
 * 
 * Copyright remains Eric Young's, and as such any Copyright notices in
 * the code are not to be removed.
 * If this package is used in a product, Eric Young should be given attribution
 * as the author of the parts of the library used.
 * This can be in the form of a textual message at program startup or
 * in documentation (online or textual) provided with the package.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *    "This product includes cryptographic software written by
 *     Eric Young ([e-mail])"
 *    The word 'cryptographic' can be left out if the rouines from the library
 *    being used are not cryptographic related :-).
 * 4. If you include any Windows specific code (or a derivative thereof) from 
 *    the apps directory (application code) you must include an acknowledgement:
 *    "This product includes software written by Tim Hudson ([e-mail])"
 * 
 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * 
 * The licence and distribution terms for any publically available version or
 * derivative of this code cannot be changed.  i.e. this code cannot simply be
 * copied and put under another distribution licence
 * [including the GNU Public Licence.]
 */

#include <stdlib.h>
#include <string.h>

#include <openssl/opensslconf.h>
#include <openssl/sha.h>

#ifndef SHA_LONG_LOG2
#define SHA_LONG_LOG2	2	/* default to 32 bits */
#endif

#define DATA_ORDER_IS_BIG_ENDIAN

#define HASH_LONG               SHA_LONG
#define HASH_LONG_LOG2          SHA_LONG_LOG2
#define HASH_CTX                SHA_CTX
#define HASH_CBLOCK             SHA_CBLOCK
#define HASH_LBLOCK             SHA_LBLOCK
#define HASH_MAKE_STRING(c,s)   do {	\
	unsigned long ll;		\
	ll=(c)->h0; HOST_l2c(ll,(s));	\
	ll=(c)->h1; HOST_l2c(ll,(s));	\
	ll=(c)->h2; HOST_l2c(ll,(s));	\
	ll=(c)->h3; HOST_l2c(ll,(s));	\
	ll=(c)->h4; HOST_l2c(ll,(s));	\
	} while (0)

#if defined(SHA_0)

# define HASH_UPDATE             	SHA_Update
# define HASH_TRANSFORM          	SHA_Transform
# define HASH_FINAL              	SHA_Final
# define HASH_INIT			SHA_Init
# define HASH_BLOCK_HOST_ORDER   	sha_block_host_order
# define HASH_BLOCK_DATA_ORDER   	sha_block_data_order
# define Xupdate(a,ix,ia,ib,ic,id)	(ix=(a)=(ia^ib^ic^id))

  void sha_block_host_order (SHA_CTX *c, const void *p,int num);
  void sha_block_data_order (SHA_CTX *c, const void *p,int num);

#elif defined(SHA_1)

# define HASH_UPDATE             	SHA1_Update
# define HASH_TRANSFORM          	SHA1_Transform
# define HASH_FINAL              	SHA1_Final
# define HASH_INIT			SHA1_Init
# define HASH_BLOCK_HOST_ORDER   	sha1_block_host_order
# define HASH_BLOCK_DATA_ORDER   	sha1_block_data_order
# if defined(__MWERKS__) && defined(__MC68K__)
   /* Metrowerks for Motorola fails otherwise:-( <[e-mail]> */
#  define Xupdate(a,ix,ia,ib,ic,id)	do { (a)=(ia^ib^ic^id);		\
					     ix=(a)=ROTATE((a),1);	\
					} while (0)
# else
#  define Xupdate(a,ix,ia,ib,ic,id)	( (a)=(ia^ib^ic^id),	\
					  ix=(a)=ROTATE((a),1)	\
					)
# endif

# ifdef SHA1_ASM
#  if defined(__i386) || defined(__i386__) || defined(_M_IX86) || defined(__INTEL__)
#   define sha1_block_host_order		sha1_block_asm_host_order
#   define DONT_IMPLEMENT_BLOCK_HOST_ORDER
#   define sha1_block_data_order		sha1_block_asm_data_order
#   define DONT_IMPLEMENT_BLOCK_DATA_ORDER
#   define HASH_BLOCK_DATA_ORDER_ALIGNED	sha1_block_asm_data_order
#  endif
# endif
  void sha1_block_host_order (SHA_CTX *c, const void *p,int num);
  void sha1_block_data_order (SHA_CTX *c, const void *p,int num);

#else
# error "Either SHA_0 or SHA_1 must be defined."
#endif

#include "md32_common.h"

#define INIT_DATA_h0 0x67452301UL
#define INIT_DATA_h1 0xefcdab89UL
#define INIT_DATA_h2 0x98badcfeUL
#define INIT_DATA_h3 0x10325476UL
#define INIT_DATA_h4 0xc3d2e1f0UL

int HASH_INIT (SHA_CTX *c)
	{
	c->h0=INIT_DATA_h0;
	c->h1=INIT_DATA_h1;
	c->h2=INIT_DATA_h2;
	c->h3=INIT_DATA_h3;
	c->h4=INIT_DATA_h4;
	c->Nl=0;
	c->Nh=0;
	c->num=0;
	return 1;
	}

#define K_00_19	0x5a827999UL
#define K_20_39 0x6ed9eba1UL
#define K_40_59 0x8f1bbcdcUL
#define K_60_79 0xca62c1d6UL

/* As  pointed out by Wei Dai <[e-mail]>, F() below can be
 * simplified to the code in F_00_19.  Wei attributes these optimisations
 * to Peter Gutmann's SHS code, and he attributes it to Rich Schroeppel.
 * #define F(x,y,z) (((x) & (y))  |  ((~(x)) & (z)))
 * I've just become aware of another tweak to be made, again from Wei Dai,
 * in F_40_59, (x&a)|(y&a) -> (x|y)&a
 */
#define	F_00_19(b,c,d)	((((c) ^ (d)) & (b)) ^ (d)) 
#define	F_20_39(b,c,d)	((b) ^ (c) ^ (d))
#define F_40_59(b,c,d)	(((b) & (c)) | (((b)|(c)) & (d))) 
#define	F_60_79(b,c,d)	F_20_39(b,c,d)

#define BODY_00_15(i,a,b,c,d,e,f,xi) \
	(f)=xi+(e)+K_00_19+ROTATE((a),5)+F_00_19((b),(c),(d)); \
	(b)=ROTATE((b),30);

#define BODY_16_19(i,a,b,c,d,e,f,xi,xa,xb,xc,xd) \
	Xupdate(f,xi,xa,xb,xc,xd); \
	(f)+=(e)+K_00_19+ROTATE((a),5)+F_00_19((b),(c),(d)); \
	(b)=ROTATE((b),30);

#define BODY_20_31(i,a,b,c,d,e,f,xi,xa,xb,xc,xd) \
	Xupdate(f,xi,xa,xb,xc,xd); \
	(f)+=(e)+K_20_39+ROTATE((a),5)+F_20_39((b),(c),(d)); \
	(b)=ROTATE((b),30);

#define BODY_32_39(i,a,b,c,d,e,f,xa,xb,xc,xd) \
	Xupdate(f,xa,xa,xb,xc,xd); \
	(f)+=(e)+K_20_39+ROTATE((a),5)+F_20_39((b),(c),(d)); \
	(b)=ROTATE((b),30);

#define BODY_40_59(i,a,b,c,d,e,f,xa,xb,xc,xd) \
	Xupdate(f,xa,xa,xb,xc,xd); \
	(f)+=(e)+K_40_59+ROTATE((a),5)+F_40_59((b),(c),(d)); \
	(b)=ROTATE((b),30);

#define BODY_60_79(i,a,b,c,d,e,f,xa,xb,xc,xd) \
	Xupdate(f,xa,xa,xb,xc,xd); \
	(f)=xa+(e)+K_60_79+ROTATE((a),5)+F_60_79((b),(c),(d)); \
	(b)=ROTATE((b),30);

#ifdef X
#undef X
#endif
#ifndef MD32_XARRAY
  /*
   * Originally X was an array. As it's automatic it's natural
   * to expect RISC compiler to accomodate at least part of it in
   * the register bank, isn't it? Unfortunately not all compilers
   * "find" this expectation reasonable:-( On order to make such
   * compilers generate better code I replace X[] with a bunch of
   * X0, X1, etc. See the function body below...
   *					<[e-mail]>
   */
# define X(i)	XX##i
#else
  /*
   * However! Some compilers (most notably HP C) get overwhelmed by
   * that many local variables so that we have to have the way to
   * fall down to the original behavior.
   */
# define X(i)	XX[i]
#endif

#ifndef DONT_IMPLEMENT_BLOCK_HOST_ORDER
void HASH_BLOCK_HOST_ORDER (SHA_CTX *c, const void *d, int num)
	{
	const SHA_LONG *W=d;
	register unsigned MD32_REG_T A,B,C,D,E,T;
#ifndef MD32_XARRAY
	unsigned MD32_REG_T	XX0, XX1, XX2, XX3, XX4, XX5, XX6, XX7,
				XX8, XX9,XX10,XX11,XX12,XX13,XX14,XX15;
#else
	SHA_LONG	XX[16];
#endif

	A=c->h0;
	B=c->h1;
	C=c->h2;