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openssl/crypto/sha/sha_dgst.c
Bodo Möller 93c5624f04 Moved some variable declarations inside blocks where they are needed 
so that warnings about unused variables (for certain
-D... constellations) are avoided; this corresponds to the earlier
change for SHA1.
Submitted by:
Reviewed by:
PR:
1999-05-10 11:10:38 +00:00

492 lines
12 KiB
C
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/* crypto/sha/sha_dgst.c */
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
* All rights reserved.
*
* This package is an SSL implementation written
* by Eric Young (eay@cryptsoft.com).
* 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 (tjh@cryptsoft.com).
*
* 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 (eay@cryptsoft.com)"
* 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 (tjh@cryptsoft.com)"
*
* 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 <stdio.h>
#include <string.h>
#define SHA_0
#undef SHA_1
#include <openssl/sha.h>
#include "sha_locl.h"
#include <openssl/opensslv.h>
#ifndef NO_SHA0
char *SHA_version="SHA" OPENSSL_VERSION_PTEXT;
/* Implemented from SHA-0 document - The Secure Hash Algorithm
*/
#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
#define K_00_19 0x5a827999UL
#define K_20_39 0x6ed9eba1UL
#define K_40_59 0x8f1bbcdcUL
#define K_60_79 0xca62c1d6UL
static void sha_block(SHA_CTX *c, register SHA_LONG *p, int num);
#if !defined(B_ENDIAN) && defined(SHA_ASM)
# define M_c2nl c2l
# define M_p_c2nl p_c2l
# define M_c2nl_p c2l_p
# define M_p_c2nl_p p_c2l_p
# define M_nl2c l2c
#else
# define M_c2nl c2nl
# define M_p_c2nl p_c2nl
# define M_c2nl_p c2nl_p
# define M_p_c2nl_p p_c2nl_p
# define M_nl2c nl2c
#endif
void SHA_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;
}
void SHA_Update(SHA_CTX *c, const register unsigned char *data,
unsigned long len)
{
register SHA_LONG *p;
int ew,ec,sw,sc;
SHA_LONG l;
if (len == 0) return;
l=(c->Nl+(len<<3))&0xffffffffL;
if (l < c->Nl) /* overflow */
c->Nh++;
c->Nh+=(len>>29);
c->Nl=l;
if (c->num != 0)
{
p=c->data;
sw=c->num>>2;
sc=c->num&0x03;
if ((c->num+len) >= SHA_CBLOCK)
{
l= p[sw];
M_p_c2nl(data,l,sc);
p[sw++]=l;
for (; sw<SHA_LBLOCK; sw++)
{
M_c2nl(data,l);
p[sw]=l;
}
len-=(SHA_CBLOCK-c->num);
sha_block(c,p,1);
c->num=0;
/* drop through and do the rest */
}
else
{
c->num+=(int)len;
if ((sc+len) < 4) /* ugly, add char's to a word */
{
l= p[sw];
M_p_c2nl_p(data,l,sc,len);
p[sw]=l;
}
else
{
ew=(c->num>>2);
ec=(c->num&0x03);
l= p[sw];
M_p_c2nl(data,l,sc);
p[sw++]=l;
for (; sw < ew; sw++)
{ M_c2nl(data,l); p[sw]=l; }
if (ec)
{
M_c2nl_p(data,l,ec);
p[sw]=l;
}
}
return;
}
}
/* We can only do the following code for assember, the reason
* being that the sha_block 'C' version changes the values
* in the 'data' array. The assember code avoids this and
* copies it to a local array. I should be able to do this for
* the C version as well....
*/
#if SHA_LONG_LOG2==2
#if defined(B_ENDIAN) || defined(SHA_ASM)
if ((((unsigned long)data)%sizeof(SHA_LONG)) == 0)
{
sw=len/SHA_CBLOCK;
if (sw)
{
sha_block(c,(SHA_LONG *)data,sw);
sw*=SHA_CBLOCK;
data+=sw;
len-=sw;
}
}
#endif
#endif
/* we now can process the input data in blocks of SHA_CBLOCK
* chars and save the leftovers to c->data. */
p=c->data;
while (len >= SHA_CBLOCK)
{
#if SHA_LONG_LOG2==2
#if defined(B_ENDIAN) || defined(SHA_ASM)
#define SHA_NO_TAIL_CODE
/*
* Basically we get here only when data happens
* to be unaligned.
*/
if (p != (SHA_LONG *)data)
memcpy(p,data,SHA_CBLOCK);
data+=SHA_CBLOCK;
sha_block(c,p=c->data,1);
len-=SHA_CBLOCK;
#else /* little-endian */
#define BE_COPY(dst,src,i) { \
l = ((SHA_LONG *)src)[i]; \
Endian_Reverse32(l); \
dst[i] = l; \
}
if ((((unsigned long)data)%sizeof(SHA_LONG)) == 0)
{
for (sw=(SHA_LBLOCK/4); sw; sw--)
{
BE_COPY(p,data,0);
BE_COPY(p,data,1);
BE_COPY(p,data,2);
BE_COPY(p,data,3);
p+=4;
data += 4*sizeof(SHA_LONG);
}
sha_block(c,p=c->data,1);
len-=SHA_CBLOCK;
continue;
}
#endif
#endif
#ifndef SHA_NO_TAIL_CODE
/*
* In addition to "sizeof(SHA_LONG)!= 4" case the
* following code covers unaligned access cases on
* little-endian machines.
* <appro@fy.chalmers.se>
*/
p=c->data;
for (sw=(SHA_LBLOCK/4); sw; sw--)
{
M_c2nl(data,l); p[0]=l;
M_c2nl(data,l); p[1]=l;
M_c2nl(data,l); p[2]=l;
M_c2nl(data,l); p[3]=l;
p+=4;
}
p=c->data;
sha_block(c,p,1);
len-=SHA_CBLOCK;
#endif
}
ec=(int)len;
c->num=ec;
ew=(ec>>2);
ec&=0x03;
for (sw=0; sw < ew; sw++)
{ M_c2nl(data,l); p[sw]=l; }
M_c2nl_p(data,l,ec);
p[sw]=l;
}
void SHA_Transform(SHA_CTX *c, unsigned char *b)
{
SHA_LONG p[SHA_LBLOCK];
#if SHA_LONG_LOG2==2
#if defined(B_ENDIAN) || defined(SHA_ASM)
memcpy(p,b,SHA_CBLOCK);
sha_block(c,p,1);
return;
#else
if (((unsigned long)b%sizeof(SHA_LONG)) == 0)
{
SHA_LONG *q;
int i;
q=p;
for (i=(SHA_LBLOCK/4); i; i--)
{
unsigned long l;
BE_COPY(q,b,0); /* BE_COPY was defined above */
BE_COPY(q,b,1);
BE_COPY(q,b,2);
BE_COPY(q,b,3);
q+=4;
b+=4*sizeof(SHA_LONG);
}
sha_block(c,p,1);
return;
}
#endif
#endif
#ifndef SHA_NO_TAIL_CODE /* defined above, see comment */
{
SHA_LONG *q;
int i;
q=p;
for (i=(SHA_LBLOCK/4); i; i--)
{
SHA_LONG l;
c2nl(b,l); *(q++)=l;
c2nl(b,l); *(q++)=l;
c2nl(b,l); *(q++)=l;
c2nl(b,l); *(q++)=l;
}
sha_block(c,p,1);
}
#endif
}
#ifndef SHA_ASM
static void sha_block(SHA_CTX *c, register SHA_LONG *W, int num)
{
register SHA_LONG A,B,C,D,E,T;
SHA_LONG X[SHA_LBLOCK];
A=c->h0;
B=c->h1;
C=c->h2;
D=c->h3;
E=c->h4;
for (;;)
{
BODY_00_15( 0,A,B,C,D,E,T,W);
BODY_00_15( 1,T,A,B,C,D,E,W);
BODY_00_15( 2,E,T,A,B,C,D,W);
BODY_00_15( 3,D,E,T,A,B,C,W);
BODY_00_15( 4,C,D,E,T,A,B,W);
BODY_00_15( 5,B,C,D,E,T,A,W);
BODY_00_15( 6,A,B,C,D,E,T,W);
BODY_00_15( 7,T,A,B,C,D,E,W);
BODY_00_15( 8,E,T,A,B,C,D,W);
BODY_00_15( 9,D,E,T,A,B,C,W);
BODY_00_15(10,C,D,E,T,A,B,W);
BODY_00_15(11,B,C,D,E,T,A,W);
BODY_00_15(12,A,B,C,D,E,T,W);
BODY_00_15(13,T,A,B,C,D,E,W);
BODY_00_15(14,E,T,A,B,C,D,W);
BODY_00_15(15,D,E,T,A,B,C,W);
BODY_16_19(16,C,D,E,T,A,B,W,W,W,W);
BODY_16_19(17,B,C,D,E,T,A,W,W,W,W);
BODY_16_19(18,A,B,C,D,E,T,W,W,W,W);
BODY_16_19(19,T,A,B,C,D,E,W,W,W,X);
BODY_20_31(20,E,T,A,B,C,D,W,W,W,X);
BODY_20_31(21,D,E,T,A,B,C,W,W,W,X);
BODY_20_31(22,C,D,E,T,A,B,W,W,W,X);
BODY_20_31(23,B,C,D,E,T,A,W,W,W,X);
BODY_20_31(24,A,B,C,D,E,T,W,W,X,X);
BODY_20_31(25,T,A,B,C,D,E,W,W,X,X);
BODY_20_31(26,E,T,A,B,C,D,W,W,X,X);
BODY_20_31(27,D,E,T,A,B,C,W,W,X,X);
BODY_20_31(28,C,D,E,T,A,B,W,W,X,X);
BODY_20_31(29,B,C,D,E,T,A,W,W,X,X);
BODY_20_31(30,A,B,C,D,E,T,W,X,X,X);
BODY_20_31(31,T,A,B,C,D,E,W,X,X,X);
BODY_32_39(32,E,T,A,B,C,D,X);
BODY_32_39(33,D,E,T,A,B,C,X);
BODY_32_39(34,C,D,E,T,A,B,X);
BODY_32_39(35,B,C,D,E,T,A,X);
BODY_32_39(36,A,B,C,D,E,T,X);
BODY_32_39(37,T,A,B,C,D,E,X);
BODY_32_39(38,E,T,A,B,C,D,X);
BODY_32_39(39,D,E,T,A,B,C,X);
BODY_40_59(40,C,D,E,T,A,B,X);
BODY_40_59(41,B,C,D,E,T,A,X);
BODY_40_59(42,A,B,C,D,E,T,X);
BODY_40_59(43,T,A,B,C,D,E,X);
BODY_40_59(44,E,T,A,B,C,D,X);
BODY_40_59(45,D,E,T,A,B,C,X);
BODY_40_59(46,C,D,E,T,A,B,X);
BODY_40_59(47,B,C,D,E,T,A,X);
BODY_40_59(48,A,B,C,D,E,T,X);
BODY_40_59(49,T,A,B,C,D,E,X);
BODY_40_59(50,E,T,A,B,C,D,X);
BODY_40_59(51,D,E,T,A,B,C,X);
BODY_40_59(52,C,D,E,T,A,B,X);
BODY_40_59(53,B,C,D,E,T,A,X);
BODY_40_59(54,A,B,C,D,E,T,X);
BODY_40_59(55,T,A,B,C,D,E,X);
BODY_40_59(56,E,T,A,B,C,D,X);
BODY_40_59(57,D,E,T,A,B,C,X);
BODY_40_59(58,C,D,E,T,A,B,X);
BODY_40_59(59,B,C,D,E,T,A,X);
BODY_60_79(60,A,B,C,D,E,T,X);
BODY_60_79(61,T,A,B,C,D,E,X);
BODY_60_79(62,E,T,A,B,C,D,X);
BODY_60_79(63,D,E,T,A,B,C,X);
BODY_60_79(64,C,D,E,T,A,B,X);
BODY_60_79(65,B,C,D,E,T,A,X);
BODY_60_79(66,A,B,C,D,E,T,X);
BODY_60_79(67,T,A,B,C,D,E,X);
BODY_60_79(68,E,T,A,B,C,D,X);
BODY_60_79(69,D,E,T,A,B,C,X);
BODY_60_79(70,C,D,E,T,A,B,X);
BODY_60_79(71,B,C,D,E,T,A,X);
BODY_60_79(72,A,B,C,D,E,T,X);
BODY_60_79(73,T,A,B,C,D,E,X);
BODY_60_79(74,E,T,A,B,C,D,X);
BODY_60_79(75,D,E,T,A,B,C,X);
BODY_60_79(76,C,D,E,T,A,B,X);
BODY_60_79(77,B,C,D,E,T,A,X);
BODY_60_79(78,A,B,C,D,E,T,X);
BODY_60_79(79,T,A,B,C,D,E,X);
c->h0=(c->h0+E)&0xffffffffL;
c->h1=(c->h1+T)&0xffffffffL;
c->h2=(c->h2+A)&0xffffffffL;
c->h3=(c->h3+B)&0xffffffffL;
c->h4=(c->h4+C)&0xffffffffL;
if (--num <= 0) break;
A=c->h0;
B=c->h1;
C=c->h2;
D=c->h3;
E=c->h4;
W+=SHA_LBLOCK; /* Note! This can happen only when sizeof(SHA_LONG)
* is 4. Whenever it's not the actual case this
* function is never called with num larger than 1
* and we never advance down here.
* <appro@fy.chalmers.se>
*/
}
}
#endif
void SHA_Final(unsigned char *md, SHA_CTX *c)
{
register int i,j;
register SHA_LONG l;
register SHA_LONG *p;
static unsigned char end[4]={0x80,0x00,0x00,0x00};
unsigned char *cp=end;
/* c->num should definitly have room for at least one more byte. */
p=c->data;
j=c->num;
i=j>>2;
#ifdef PURIFY
if ((j&0x03) == 0) p[i]=0;
#endif
l=p[i];
M_p_c2nl(cp,l,j&0x03);
p[i]=l;
i++;
/* i is the next 'undefined word' */
if (c->num >= SHA_LAST_BLOCK)
{
for (; i<SHA_LBLOCK; i++)
p[i]=0;
sha_block(c,p,1);
i=0;
}
for (; i<(SHA_LBLOCK-2); i++)
p[i]=0;
p[SHA_LBLOCK-2]=c->Nh;
p[SHA_LBLOCK-1]=c->Nl;
#if SHA_LONG_LOG2==2
#if !defined(B_ENDIAN) && defined(SHA_ASM)
Endian_Reverse32(p[SHA_LBLOCK-2]);
Endian_Reverse32(p[SHA_LBLOCK-1]);
#endif
#endif
sha_block(c,p,1);
cp=md;
l=c->h0; nl2c(l,cp);
l=c->h1; nl2c(l,cp);
l=c->h2; nl2c(l,cp);
l=c->h3; nl2c(l,cp);
l=c->h4; nl2c(l,cp);
c->num=0;
/* sha_block may be leaving some stuff on the stack
* but I'm not worried :-)
memset((void *)c,0,sizeof(SHA_CTX));
*/
}
#endif
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