release/src/router/openssl/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/crypto.h>
  63 #include <openssl/des.h>
  64 #include <openssl/mdc2.h>
  65
  66 #undef c2l
  67 #define c2l(c,l)        (l =((DES_LONG)(*((c)++)))    , \
  68                          l|=((DES_LONG)(*((c)++)))<< 8L, \
  69                          l|=((DES_LONG)(*((c)++)))<<16L, \
  70                          l|=((DES_LONG)(*((c)++)))<<24L)
  71
  72 #undef l2c
  73 #define l2c(l,c)        (*((c)++)=(unsigned char)(((l)     )&0xff), \
  74                         *((c)++)=(unsigned char)(((l)>> 8L)&0xff), \
  75                         *((c)++)=(unsigned char)(((l)>>16L)&0xff), \
  76                         *((c)++)=(unsigned char)(((l)>>24L)&0xff))
  77
  78 static void mdc2_body(MDC2_CTX *c, const unsigned char *in, size_t len);
  79 fips_md_init(MDC2)
  80         {
  81         c->num=0;
  82         c->pad_type=1;
  83         memset(&(c->h[0]),0x52,MDC2_BLOCK);
  84         memset(&(c->hh[0]),0x25,MDC2_BLOCK);
  85         return 1;
  86         }
  87
  88 int MDC2_Update(MDC2_CTX *c, const unsigned char *in, size_t len)
  89         {
  90         size_t i,j;
  91
  92         i=c->num;
  93         if (i != 0)
  94                 {
  95                 if (i+len < MDC2_BLOCK)
  96                         {
  97                         /* partial block */
  98                         memcpy(&(c->data[i]),in,len);
  99                         c->num+=(int)len;
 100                         return 1;
 101                         }
 102                 else
 103                         {
 104                         /* filled one */
 105                         j=MDC2_BLOCK-i;
 106                         memcpy(&(c->data[i]),in,j);
 107                         len-=j;
 108                         in+=j;
 109                         c->num=0;
 110                         mdc2_body(c,&(c->data[0]),MDC2_BLOCK);
 111                         }
 112                 }
 113         i=len&~((size_t)MDC2_BLOCK-1);
 114         if (i > 0) mdc2_body(c,in,i);
 115         j=len-i;
 116         if (j > 0)
 117                 {
 118                 memcpy(&(c->data[0]),&(in[i]),j);
 119                 c->num=(int)j;
 120                 }
 121         return 1;
 122         }
 123
 124 static void mdc2_body(MDC2_CTX *c, const unsigned char *in, size_t len)
 125         {
 126         register DES_LONG tin0,tin1;
 127         register DES_LONG ttin0,ttin1;
 128         DES_LONG d[2],dd[2];
 129         DES_key_schedule k;
 130         unsigned char *p;
 131         size_t i;
 132
 133         for (i=0; i<len; i+=8)
 134                 {
 135                 c2l(in,tin0); d[0]=dd[0]=tin0;
 136                 c2l(in,tin1); d[1]=dd[1]=tin1;
 137                 c->h[0]=(c->h[0]&0x9f)|0x40;
 138                 c->hh[0]=(c->hh[0]&0x9f)|0x20;
 139
 140                 DES_set_odd_parity(&c->h);
 141                 DES_set_key_unchecked(&c->h,&k);
 142                 DES_encrypt1(d,&k,1);
 143
 144                 DES_set_odd_parity(&c->hh);
 145                 DES_set_key_unchecked(&c->hh,&k);
 146                 DES_encrypt1(dd,&k,1);
 147
 148                 ttin0=tin0^dd[0];
 149                 ttin1=tin1^dd[1];
 150                 tin0^=d[0];
 151                 tin1^=d[1];
 152
 153                 p=c->h;
 154                 l2c(tin0,p);
 155                 l2c(ttin1,p);
 156                 p=c->hh;
 157                 l2c(ttin0,p);
 158                 l2c(tin1,p);
 159                 }
 160         }
 161
 162 int MDC2_Final(unsigned char *md, MDC2_CTX *c)
 163         {
 164         unsigned int i;
 165         int j;
 166
 167         i=c->num;
 168         j=c->pad_type;
 169         if ((i > 0) || (j == 2))
 170                 {
 171                 if (j == 2)
 172                         c->data[i++]=0x80;
 173                 memset(&(c->data[i]),0,MDC2_BLOCK-i);
 174                 mdc2_body(c,c->data,MDC2_BLOCK);
 175                 }
 176         memcpy(md,(char *)c->h,MDC2_BLOCK);
 177         memcpy(&(md[MDC2_BLOCK]),(char *)c->hh,MDC2_BLOCK);
 178         return 1;
 179         }
 180
 181 #undef TEST
 182
 183 #ifdef TEST
 184 main()
 185         {
 186         unsigned char md[MDC2_DIGEST_LENGTH];
 187         int i;
 188         MDC2_CTX c;
 189         static char *text="Now is the time for all ";
 190
 191         MDC2_Init(&c);
 192         MDC2_Update(&c,text,strlen(text));
 193         MDC2_Final(&(md[0]),&c);
 194
 195         for (i=0; i<MDC2_DIGEST_LENGTH; i++)
 196                 printf("%02X",md[i]);
 197         printf("\n");
 198         }
 199
 200 #endif