crypto/openssl-0.9/crypto/mdc2/mdc2dgst.c

   1 /* crypto/mdc2/mdc2dgst.c */
   2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
   3  * All rights reserved.
   4  *
   5  * This package is an SSL implementation written
   6  * by Eric Young (eay@cryptsoft.com).
   7  * The implementation was written so as to conform with Netscapes SSL.
   8  *
   9  * This library is free for commercial and non-commercial use as long as
  10  * the following conditions are aheared to.  The following conditions
  11  * apply to all code found in this distribution, be it the RC4, RSA,
  12  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
  13  * included with this distribution is covered by the same copyright terms
  14  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
  15  *
  16  * Copyright remains Eric Young's, and as such any Copyright notices in
  17  * the code are not to be removed.
  18  * If this package is used in a product, Eric Young should be given attribution
  19  * as the author of the parts of the library used.
  20  * This can be in the form of a textual message at program startup or
  21  * in documentation (online or textual) provided with the package.
  22  *
  23  * Redistribution and use in source and binary forms, with or without
  24  * modification, are permitted provided that the following conditions
  25  * are met:
  26  * 1. Redistributions of source code must retain the copyright
  27  *    notice, this list of conditions and the following disclaimer.
  28  * 2. Redistributions in binary form must reproduce the above copyright
  29  *    notice, this list of conditions and the following disclaimer in the
  30  *    documentation and/or other materials provided with the distribution.
  31  * 3. All advertising materials mentioning features or use of this software
  32  *    must display the following acknowledgement:
  33  *    "This product includes cryptographic software written by
  34  *     Eric Young (eay@cryptsoft.com)"
  35  *    The word 'cryptographic' can be left out if the rouines from the library
  36  *    being used are not cryptographic related :-).
  37  * 4. If you include any Windows specific code (or a derivative thereof) from
  38  *    the apps directory (application code) you must include an acknowledgement:
  39  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
  40  *
  41  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
  42  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  43  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  44  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  45  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  46  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  47  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  48  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  49  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  50  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  51  * SUCH DAMAGE.
  52  *
  53  * The licence and distribution terms for any publically available version or
  54  * derivative of this code cannot be changed.  i.e. this code cannot simply be
  55  * copied and put under another distribution licence
  56  * [including the GNU Public Licence.]
  57  */
  58
  59 #include <stdio.h>
  60 #include <stdlib.h>
  61 #include <string.h>
  62 #include <openssl/des.h>
  63 #include <openssl/mdc2.h>
  64
  65 #undef c2l
  66 #define c2l(c,l)        (l =((DES_LONG)(*((c)++)))    , \
  67                          l|=((DES_LONG)(*((c)++)))<< 8L, \
  68                          l|=((DES_LONG)(*((c)++)))<<16L, \
  69                          l|=((DES_LONG)(*((c)++)))<<24L)
  70
  71 #undef l2c
  72 #define l2c(l,c)        (*((c)++)=(unsigned char)(((l)     )&0xff), \
  73                         *((c)++)=(unsigned char)(((l)>> 8L)&0xff), \
  74                         *((c)++)=(unsigned char)(((l)>>16L)&0xff), \
  75                         *((c)++)=(unsigned char)(((l)>>24L)&0xff))
  76
  77 static void mdc2_body(MDC2_CTX *c, const unsigned char *in, size_t len);
  78 int MDC2_Init(MDC2_CTX *c)
  79         {
  80         c->num=0;
  81         c->pad_type=1;
  82         memset(&(c->h[0]),0x52,MDC2_BLOCK);
  83         memset(&(c->hh[0]),0x25,MDC2_BLOCK);
  84         return 1;
  85         }
  86
  87 int MDC2_Update(MDC2_CTX *c, const unsigned char *in, size_t len)
  88         {
  89         size_t i,j;
  90
  91         i=c->num;
  92         if (i != 0)
  93                 {
  94                 if (i+len < MDC2_BLOCK)
  95                         {
  96                         /* partial block */
  97                         memcpy(&(c->data[i]),in,len);
  98                         c->num+=(int)len;
  99                         return 1;
 100                         }
 101                 else
 102                         {
 103                         /* filled one */
 104                         j=MDC2_BLOCK-i;
 105                         memcpy(&(c->data[i]),in,j);
 106                         len-=j;
 107                         in+=j;
 108                         c->num=0;
 109                         mdc2_body(c,&(c->data[0]),MDC2_BLOCK);
 110                         }
 111                 }
 112         i=len&~((size_t)MDC2_BLOCK-1);
 113         if (i > 0) mdc2_body(c,in,i);
 114         j=len-i;
 115         if (j > 0)
 116                 {
 117                 memcpy(&(c->data[0]),&(in[i]),j);
 118                 c->num=(int)j;
 119                 }
 120         return 1;
 121         }
 122
 123 static void mdc2_body(MDC2_CTX *c, const unsigned char *in, size_t len)
 124         {
 125         register DES_LONG tin0,tin1;
 126         register DES_LONG ttin0,ttin1;
 127         DES_LONG d[2],dd[2];
 128         DES_key_schedule k;
 129         unsigned char *p;
 130         size_t i;
 131
 132         for (i=0; i<len; i+=8)
 133                 {
 134                 c2l(in,tin0); d[0]=dd[0]=tin0;
 135                 c2l(in,tin1); d[1]=dd[1]=tin1;
 136                 c->h[0]=(c->h[0]&0x9f)|0x40;
 137                 c->hh[0]=(c->hh[0]&0x9f)|0x20;
 138
 139                 DES_set_odd_parity(&c->h);
 140                 DES_set_key_unchecked(&c->h,&k);
 141                 DES_encrypt1(d,&k,1);
 142
 143                 DES_set_odd_parity(&c->hh);
 144                 DES_set_key_unchecked(&c->hh,&k);
 145                 DES_encrypt1(dd,&k,1);
 146
 147                 ttin0=tin0^dd[0];
 148                 ttin1=tin1^dd[1];
 149                 tin0^=d[0];
 150                 tin1^=d[1];
 151
 152                 p=c->h;
 153                 l2c(tin0,p);
 154                 l2c(ttin1,p);
 155                 p=c->hh;
 156                 l2c(ttin0,p);
 157                 l2c(tin1,p);
 158                 }
 159         }
 160
 161 int MDC2_Final(unsigned char *md, MDC2_CTX *c)
 162         {
 163         unsigned int i;
 164         int j;
 165
 166         i=c->num;
 167         j=c->pad_type;
 168         if ((i > 0) || (j == 2))
 169                 {
 170                 if (j == 2)
 171                         c->data[i++]=0x80;
 172                 memset(&(c->data[i]),0,MDC2_BLOCK-i);
 173                 mdc2_body(c,c->data,MDC2_BLOCK);
 174                 }
 175         memcpy(md,(char *)c->h,MDC2_BLOCK);
 176         memcpy(&(md[MDC2_BLOCK]),(char *)c->hh,MDC2_BLOCK);
 177         return 1;
 178         }
 179
 180 #undef TEST
 181
 182 #ifdef TEST
 183 main()
 184         {
 185         unsigned char md[MDC2_DIGEST_LENGTH];
 186         int i;
 187         MDC2_CTX c;
 188         static char *text="Now is the time for all ";
 189
 190         MDC2_Init(&c);
 191         MDC2_Update(&c,text,strlen(text));
 192         MDC2_Final(&(md[0]),&c);
 193
 194         for (i=0; i<MDC2_DIGEST_LENGTH; i++)
 195                 printf("%02X",md[i]);
 196         printf("\n");
 197         }
 198
 199 #endif