441 lines
11 KiB
C
441 lines
11 KiB
C
/* crypto/md5/md5_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 "md5_locl.h"
|
|
|
|
char *MD5_version="MD5 part of OpenSSL 0.9.2 31-Dec-1998";
|
|
|
|
/* Implemented from RFC1321 The MD5 Message-Digest Algorithm
|
|
*/
|
|
|
|
#define INIT_DATA_A (unsigned long)0x67452301L
|
|
#define INIT_DATA_B (unsigned long)0xefcdab89L
|
|
#define INIT_DATA_C (unsigned long)0x98badcfeL
|
|
#define INIT_DATA_D (unsigned long)0x10325476L
|
|
|
|
#ifndef NOPROTO
|
|
# ifdef MD5_ASM
|
|
void md5_block_x86(MD5_CTX *c, unsigned long *p,int num);
|
|
# define md5_block md5_block_x86
|
|
# else
|
|
static void md5_block(MD5_CTX *c, unsigned long *p,int num);
|
|
# endif
|
|
#else
|
|
# ifdef MD5_ASM
|
|
void md5_block_x86();
|
|
# define md5_block md5_block_x86
|
|
# else
|
|
static void md5_block();
|
|
# endif
|
|
#endif
|
|
|
|
void MD5_Init(c)
|
|
MD5_CTX *c;
|
|
{
|
|
c->A=INIT_DATA_A;
|
|
c->B=INIT_DATA_B;
|
|
c->C=INIT_DATA_C;
|
|
c->D=INIT_DATA_D;
|
|
c->Nl=0;
|
|
c->Nh=0;
|
|
c->num=0;
|
|
}
|
|
|
|
void MD5_Update(c, _data, len)
|
|
MD5_CTX *c;
|
|
const void *_data;
|
|
unsigned long len;
|
|
{
|
|
register const unsigned char *data=_data;
|
|
register ULONG *p;
|
|
int sw,sc;
|
|
ULONG l;
|
|
|
|
if (len == 0) return;
|
|
|
|
l=(c->Nl+(len<<3))&0xffffffffL;
|
|
/* 95-05-24 eay Fixed a bug with the overflow handling, thanks to
|
|
* Wei Dai <weidai@eskimo.com> for pointing it out. */
|
|
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) >= MD5_CBLOCK)
|
|
{
|
|
l= p[sw];
|
|
p_c2l(data,l,sc);
|
|
p[sw++]=l;
|
|
for (; sw<MD5_LBLOCK; sw++)
|
|
{
|
|
c2l(data,l);
|
|
p[sw]=l;
|
|
}
|
|
len-=(MD5_CBLOCK-c->num);
|
|
|
|
md5_block(c,p,64);
|
|
c->num=0;
|
|
/* drop through and do the rest */
|
|
}
|
|
else
|
|
{
|
|
int ew,ec;
|
|
|
|
c->num+=(int)len;
|
|
if ((sc+len) < 4) /* ugly, add char's to a word */
|
|
{
|
|
l= p[sw];
|
|
p_c2l_p(data,l,sc,len);
|
|
p[sw]=l;
|
|
}
|
|
else
|
|
{
|
|
ew=(c->num>>2);
|
|
ec=(c->num&0x03);
|
|
l= p[sw];
|
|
p_c2l(data,l,sc);
|
|
p[sw++]=l;
|
|
for (; sw < ew; sw++)
|
|
{ c2l(data,l); p[sw]=l; }
|
|
if (ec)
|
|
{
|
|
c2l_p(data,l,ec);
|
|
p[sw]=l;
|
|
}
|
|
}
|
|
return;
|
|
}
|
|
}
|
|
/* we now can process the input data in blocks of MD5_CBLOCK
|
|
* chars and save the leftovers to c->data. */
|
|
#ifdef L_ENDIAN
|
|
if ((((unsigned long)data)%sizeof(ULONG)) == 0)
|
|
{
|
|
sw=(int)len/MD5_CBLOCK;
|
|
if (sw > 0)
|
|
{
|
|
sw*=MD5_CBLOCK;
|
|
md5_block(c,(ULONG *)data,sw);
|
|
data+=sw;
|
|
len-=sw;
|
|
}
|
|
}
|
|
#endif
|
|
p=c->data;
|
|
while (len >= MD5_CBLOCK)
|
|
{
|
|
#if defined(L_ENDIAN) || defined(B_ENDIAN)
|
|
if (p != (unsigned long *)data)
|
|
memcpy(p,data,MD5_CBLOCK);
|
|
data+=MD5_CBLOCK;
|
|
#ifdef B_ENDIAN
|
|
for (sw=(MD5_LBLOCK/4); sw; sw--)
|
|
{
|
|
Endian_Reverse32(p[0]);
|
|
Endian_Reverse32(p[1]);
|
|
Endian_Reverse32(p[2]);
|
|
Endian_Reverse32(p[3]);
|
|
p+=4;
|
|
}
|
|
#endif
|
|
#else
|
|
for (sw=(MD5_LBLOCK/4); sw; sw--)
|
|
{
|
|
c2l(data,l); *(p++)=l;
|
|
c2l(data,l); *(p++)=l;
|
|
c2l(data,l); *(p++)=l;
|
|
c2l(data,l); *(p++)=l;
|
|
}
|
|
#endif
|
|
p=c->data;
|
|
md5_block(c,p,64);
|
|
len-=MD5_CBLOCK;
|
|
}
|
|
sc=(int)len;
|
|
c->num=sc;
|
|
if (sc)
|
|
{
|
|
sw=sc>>2; /* words to copy */
|
|
#ifdef L_ENDIAN
|
|
p[sw]=0;
|
|
memcpy(p,data,sc);
|
|
#else
|
|
sc&=0x03;
|
|
for ( ; sw; sw--)
|
|
{ c2l(data,l); *(p++)=l; }
|
|
c2l_p(data,l,sc);
|
|
*p=l;
|
|
#endif
|
|
}
|
|
}
|
|
|
|
void MD5_Transform(c,b)
|
|
MD5_CTX *c;
|
|
unsigned char *b;
|
|
{
|
|
ULONG p[16];
|
|
#if !defined(L_ENDIAN)
|
|
ULONG *q;
|
|
int i;
|
|
#endif
|
|
|
|
#if defined(B_ENDIAN) || defined(L_ENDIAN)
|
|
memcpy(p,b,64);
|
|
#ifdef B_ENDIAN
|
|
q=p;
|
|
for (i=(MD5_LBLOCK/4); i; i--)
|
|
{
|
|
Endian_Reverse32(q[0]);
|
|
Endian_Reverse32(q[1]);
|
|
Endian_Reverse32(q[2]);
|
|
Endian_Reverse32(q[3]);
|
|
q+=4;
|
|
}
|
|
#endif
|
|
#else
|
|
q=p;
|
|
for (i=(MD5_LBLOCK/4); i; i--)
|
|
{
|
|
ULONG l;
|
|
c2l(b,l); *(q++)=l;
|
|
c2l(b,l); *(q++)=l;
|
|
c2l(b,l); *(q++)=l;
|
|
c2l(b,l); *(q++)=l;
|
|
}
|
|
#endif
|
|
md5_block(c,p,64);
|
|
}
|
|
|
|
#ifndef MD5_ASM
|
|
|
|
static void md5_block(c, X, num)
|
|
MD5_CTX *c;
|
|
register ULONG *X;
|
|
int num;
|
|
{
|
|
register ULONG A,B,C,D;
|
|
|
|
A=c->A;
|
|
B=c->B;
|
|
C=c->C;
|
|
D=c->D;
|
|
for (;;)
|
|
{
|
|
/* Round 0 */
|
|
R0(A,B,C,D,X[ 0], 7,0xd76aa478L);
|
|
R0(D,A,B,C,X[ 1],12,0xe8c7b756L);
|
|
R0(C,D,A,B,X[ 2],17,0x242070dbL);
|
|
R0(B,C,D,A,X[ 3],22,0xc1bdceeeL);
|
|
R0(A,B,C,D,X[ 4], 7,0xf57c0fafL);
|
|
R0(D,A,B,C,X[ 5],12,0x4787c62aL);
|
|
R0(C,D,A,B,X[ 6],17,0xa8304613L);
|
|
R0(B,C,D,A,X[ 7],22,0xfd469501L);
|
|
R0(A,B,C,D,X[ 8], 7,0x698098d8L);
|
|
R0(D,A,B,C,X[ 9],12,0x8b44f7afL);
|
|
R0(C,D,A,B,X[10],17,0xffff5bb1L);
|
|
R0(B,C,D,A,X[11],22,0x895cd7beL);
|
|
R0(A,B,C,D,X[12], 7,0x6b901122L);
|
|
R0(D,A,B,C,X[13],12,0xfd987193L);
|
|
R0(C,D,A,B,X[14],17,0xa679438eL);
|
|
R0(B,C,D,A,X[15],22,0x49b40821L);
|
|
/* Round 1 */
|
|
R1(A,B,C,D,X[ 1], 5,0xf61e2562L);
|
|
R1(D,A,B,C,X[ 6], 9,0xc040b340L);
|
|
R1(C,D,A,B,X[11],14,0x265e5a51L);
|
|
R1(B,C,D,A,X[ 0],20,0xe9b6c7aaL);
|
|
R1(A,B,C,D,X[ 5], 5,0xd62f105dL);
|
|
R1(D,A,B,C,X[10], 9,0x02441453L);
|
|
R1(C,D,A,B,X[15],14,0xd8a1e681L);
|
|
R1(B,C,D,A,X[ 4],20,0xe7d3fbc8L);
|
|
R1(A,B,C,D,X[ 9], 5,0x21e1cde6L);
|
|
R1(D,A,B,C,X[14], 9,0xc33707d6L);
|
|
R1(C,D,A,B,X[ 3],14,0xf4d50d87L);
|
|
R1(B,C,D,A,X[ 8],20,0x455a14edL);
|
|
R1(A,B,C,D,X[13], 5,0xa9e3e905L);
|
|
R1(D,A,B,C,X[ 2], 9,0xfcefa3f8L);
|
|
R1(C,D,A,B,X[ 7],14,0x676f02d9L);
|
|
R1(B,C,D,A,X[12],20,0x8d2a4c8aL);
|
|
/* Round 2 */
|
|
R2(A,B,C,D,X[ 5], 4,0xfffa3942L);
|
|
R2(D,A,B,C,X[ 8],11,0x8771f681L);
|
|
R2(C,D,A,B,X[11],16,0x6d9d6122L);
|
|
R2(B,C,D,A,X[14],23,0xfde5380cL);
|
|
R2(A,B,C,D,X[ 1], 4,0xa4beea44L);
|
|
R2(D,A,B,C,X[ 4],11,0x4bdecfa9L);
|
|
R2(C,D,A,B,X[ 7],16,0xf6bb4b60L);
|
|
R2(B,C,D,A,X[10],23,0xbebfbc70L);
|
|
R2(A,B,C,D,X[13], 4,0x289b7ec6L);
|
|
R2(D,A,B,C,X[ 0],11,0xeaa127faL);
|
|
R2(C,D,A,B,X[ 3],16,0xd4ef3085L);
|
|
R2(B,C,D,A,X[ 6],23,0x04881d05L);
|
|
R2(A,B,C,D,X[ 9], 4,0xd9d4d039L);
|
|
R2(D,A,B,C,X[12],11,0xe6db99e5L);
|
|
R2(C,D,A,B,X[15],16,0x1fa27cf8L);
|
|
R2(B,C,D,A,X[ 2],23,0xc4ac5665L);
|
|
/* Round 3 */
|
|
R3(A,B,C,D,X[ 0], 6,0xf4292244L);
|
|
R3(D,A,B,C,X[ 7],10,0x432aff97L);
|
|
R3(C,D,A,B,X[14],15,0xab9423a7L);
|
|
R3(B,C,D,A,X[ 5],21,0xfc93a039L);
|
|
R3(A,B,C,D,X[12], 6,0x655b59c3L);
|
|
R3(D,A,B,C,X[ 3],10,0x8f0ccc92L);
|
|
R3(C,D,A,B,X[10],15,0xffeff47dL);
|
|
R3(B,C,D,A,X[ 1],21,0x85845dd1L);
|
|
R3(A,B,C,D,X[ 8], 6,0x6fa87e4fL);
|
|
R3(D,A,B,C,X[15],10,0xfe2ce6e0L);
|
|
R3(C,D,A,B,X[ 6],15,0xa3014314L);
|
|
R3(B,C,D,A,X[13],21,0x4e0811a1L);
|
|
R3(A,B,C,D,X[ 4], 6,0xf7537e82L);
|
|
R3(D,A,B,C,X[11],10,0xbd3af235L);
|
|
R3(C,D,A,B,X[ 2],15,0x2ad7d2bbL);
|
|
R3(B,C,D,A,X[ 9],21,0xeb86d391L);
|
|
|
|
A+=c->A&0xffffffffL;
|
|
B+=c->B&0xffffffffL;
|
|
c->A=A;
|
|
c->B=B;
|
|
C+=c->C&0xffffffffL;
|
|
D+=c->D&0xffffffffL;
|
|
c->C=C;
|
|
c->D=D;
|
|
X+=16;
|
|
num-=64;
|
|
if (num <= 0) break;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
void MD5_Final(md, c)
|
|
unsigned char *md;
|
|
MD5_CTX *c;
|
|
{
|
|
register int i,j;
|
|
register ULONG l;
|
|
register ULONG *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;
|
|
|
|
/* purify often complains about the following line as an
|
|
* Uninitialized Memory Read. While this can be true, the
|
|
* following p_c2l macro will reset l when that case is true.
|
|
* This is because j&0x03 contains the number of 'valid' bytes
|
|
* already in p[i]. If and only if j&0x03 == 0, the UMR will
|
|
* occur but this is also the only time p_c2l will do
|
|
* l= *(cp++) instead of l|= *(cp++)
|
|
* Many thanks to Alex Tang <altitude@cic.net> for pickup this
|
|
* 'potential bug' */
|
|
#ifdef PURIFY
|
|
if ((j&0x03) == 0) p[i]=0;
|
|
#endif
|
|
l=p[i];
|
|
p_c2l(cp,l,j&0x03);
|
|
p[i]=l;
|
|
i++;
|
|
/* i is the next 'undefined word' */
|
|
if (c->num >= MD5_LAST_BLOCK)
|
|
{
|
|
for (; i<MD5_LBLOCK; i++)
|
|
p[i]=0;
|
|
md5_block(c,p,64);
|
|
i=0;
|
|
}
|
|
for (; i<(MD5_LBLOCK-2); i++)
|
|
p[i]=0;
|
|
p[MD5_LBLOCK-2]=c->Nl;
|
|
p[MD5_LBLOCK-1]=c->Nh;
|
|
md5_block(c,p,64);
|
|
cp=md;
|
|
l=c->A; l2c(l,cp);
|
|
l=c->B; l2c(l,cp);
|
|
l=c->C; l2c(l,cp);
|
|
l=c->D; l2c(l,cp);
|
|
|
|
/* clear stuff, md5_block may be leaving some stuff on the stack
|
|
* but I'm not worried :-) */
|
|
c->num=0;
|
|
/* memset((char *)&c,0,sizeof(c));*/
|
|
}
|
|
|
|
#ifdef undef
|
|
int printit(l)
|
|
unsigned long *l;
|
|
{
|
|
int i,ii;
|
|
|
|
for (i=0; i<2; i++)
|
|
{
|
|
for (ii=0; ii<8; ii++)
|
|
{
|
|
fprintf(stderr,"%08lx ",l[i*8+ii]);
|
|
}
|
|
fprintf(stderr,"\n");
|
|
}
|
|
}
|
|
#endif
|