crypto/md/md2_dgst.c

   1 /* crypto/md/md2_dgst.c */
   2 /* Copyright (C) 1995-1997 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 "md2.h"
  63
  64 char *MD2_version="MD2 part of SSLeay 0.8.1b 29-Jun-1998";
  65
  66 /* Implemented from RFC1319 The MD2 Message-Digest Algorithm
  67  */
  68
  69 #define UCHAR   unsigned char
  70
  71 #ifndef NOPROTO
  72 static void md2_block(MD2_CTX *c, unsigned char *d);
  73 #else
  74 static void md2_block();
  75 #endif
  76
  77 /* The magic S table - I have converted it to hex since it is
  78  * basicaly just a random byte string. */
  79 static MD2_INT S[256]={
  80         0x29, 0x2E, 0x43, 0xC9, 0xA2, 0xD8, 0x7C, 0x01,
  81         0x3D, 0x36, 0x54, 0xA1, 0xEC, 0xF0, 0x06, 0x13,
  82         0x62, 0xA7, 0x05, 0xF3, 0xC0, 0xC7, 0x73, 0x8C,
  83         0x98, 0x93, 0x2B, 0xD9, 0xBC, 0x4C, 0x82, 0xCA,
  84         0x1E, 0x9B, 0x57, 0x3C, 0xFD, 0xD4, 0xE0, 0x16,
  85         0x67, 0x42, 0x6F, 0x18, 0x8A, 0x17, 0xE5, 0x12,
  86         0xBE, 0x4E, 0xC4, 0xD6, 0xDA, 0x9E, 0xDE, 0x49,
  87         0xA0, 0xFB, 0xF5, 0x8E, 0xBB, 0x2F, 0xEE, 0x7A,
  88         0xA9, 0x68, 0x79, 0x91, 0x15, 0xB2, 0x07, 0x3F,
  89         0x94, 0xC2, 0x10, 0x89, 0x0B, 0x22, 0x5F, 0x21,
  90         0x80, 0x7F, 0x5D, 0x9A, 0x5A, 0x90, 0x32, 0x27,
  91         0x35, 0x3E, 0xCC, 0xE7, 0xBF, 0xF7, 0x97, 0x03,
  92         0xFF, 0x19, 0x30, 0xB3, 0x48, 0xA5, 0xB5, 0xD1,
  93         0xD7, 0x5E, 0x92, 0x2A, 0xAC, 0x56, 0xAA, 0xC6,
  94         0x4F, 0xB8, 0x38, 0xD2, 0x96, 0xA4, 0x7D, 0xB6,
  95         0x76, 0xFC, 0x6B, 0xE2, 0x9C, 0x74, 0x04, 0xF1,
  96         0x45, 0x9D, 0x70, 0x59, 0x64, 0x71, 0x87, 0x20,
  97         0x86, 0x5B, 0xCF, 0x65, 0xE6, 0x2D, 0xA8, 0x02,
  98         0x1B, 0x60, 0x25, 0xAD, 0xAE, 0xB0, 0xB9, 0xF6,
  99         0x1C, 0x46, 0x61, 0x69, 0x34, 0x40, 0x7E, 0x0F,
 100         0x55, 0x47, 0xA3, 0x23, 0xDD, 0x51, 0xAF, 0x3A,
 101         0xC3, 0x5C, 0xF9, 0xCE, 0xBA, 0xC5, 0xEA, 0x26,
 102         0x2C, 0x53, 0x0D, 0x6E, 0x85, 0x28, 0x84, 0x09,
 103         0xD3, 0xDF, 0xCD, 0xF4, 0x41, 0x81, 0x4D, 0x52,
 104         0x6A, 0xDC, 0x37, 0xC8, 0x6C, 0xC1, 0xAB, 0xFA,
 105         0x24, 0xE1, 0x7B, 0x08, 0x0C, 0xBD, 0xB1, 0x4A,
 106         0x78, 0x88, 0x95, 0x8B, 0xE3, 0x63, 0xE8, 0x6D,
 107         0xE9, 0xCB, 0xD5, 0xFE, 0x3B, 0x00, 0x1D, 0x39,
 108         0xF2, 0xEF, 0xB7, 0x0E, 0x66, 0x58, 0xD0, 0xE4,
 109         0xA6, 0x77, 0x72, 0xF8, 0xEB, 0x75, 0x4B, 0x0A,
 110         0x31, 0x44, 0x50, 0xB4, 0x8F, 0xED, 0x1F, 0x1A,
 111         0xDB, 0x99, 0x8D, 0x33, 0x9F, 0x11, 0x83, 0x14,
 112         };
 113
 114 char *MD2_options()
 115         {
 116         if (sizeof(MD2_INT) == 1)
 117                 return("md2(char)");
 118         else
 119                 return("md2(int)");
 120         }
 121
 122 void MD2_Init(c)
 123 MD2_CTX *c;
 124         {
 125         c->num=0;
 126         memset(c->state,0,MD2_BLOCK*sizeof(MD2_INT));
 127         memset(c->cksm,0,MD2_BLOCK*sizeof(MD2_INT));
 128         memset(c->data,0,MD2_BLOCK);
 129         }
 130
 131 void MD2_Update(c, data, len)
 132 MD2_CTX *c;
 133 register unsigned char *data;
 134 unsigned long len;
 135         {
 136         register UCHAR *p;
 137
 138         if (len == 0) return;
 139
 140         p=c->data;
 141         if (c->num != 0)
 142                 {
 143                 if ((c->num+len) >= MD2_BLOCK)
 144                         {
 145                         memcpy(&(p[c->num]),data,MD2_BLOCK-c->num);
 146                         md2_block(c,c->data);
 147                         data+=(MD2_BLOCK - c->num);
 148                         len-=(MD2_BLOCK - c->num);
 149                         c->num=0;
 150                         /* drop through and do the rest */
 151                         }
 152                 else
 153                         {
 154                         memcpy(&(p[c->num]),data,(int)len);
 155                         /* data+=len; */
 156                         c->num+=(int)len;
 157                         return;
 158                         }
 159                 }
 160         /* we now can process the input data in blocks of MD2_BLOCK
 161          * chars and save the leftovers to c->data. */
 162         while (len >= MD2_BLOCK)
 163                 {
 164                 md2_block(c,data);
 165                 data+=MD2_BLOCK;
 166                 len-=MD2_BLOCK;
 167                 }
 168         memcpy(p,data,(int)len);
 169         c->num=(int)len;
 170         }
 171
 172 static void md2_block(c, d)
 173 MD2_CTX *c;
 174 unsigned char *d;
 175         {
 176         register MD2_INT t,*sp1,*sp2;
 177         register int i,j;
 178         MD2_INT state[48];
 179
 180         sp1=c->state;
 181         sp2=c->cksm;
 182         j=sp2[MD2_BLOCK-1];
 183         for (i=0; i<16; i++)
 184                 {
 185                 state[i]=sp1[i];
 186                 state[i+16]=t=d[i];
 187                 state[i+32]=(t^sp1[i]);
 188                 j=sp2[i]^=S[t^j];
 189                 }
 190         t=0;
 191         for (i=0; i<18; i++)
 192                 {
 193                 for (j=0; j<48; j+=8)
 194                         {
 195                         t= state[j+ 0]^=S[t];
 196                         t= state[j+ 1]^=S[t];
 197                         t= state[j+ 2]^=S[t];
 198                         t= state[j+ 3]^=S[t];
 199                         t= state[j+ 4]^=S[t];
 200                         t= state[j+ 5]^=S[t];
 201                         t= state[j+ 6]^=S[t];
 202                         t= state[j+ 7]^=S[t];
 203                         }
 204                 t=(t+i)&0xff;
 205                 }
 206         memcpy(sp1,state,16*sizeof(MD2_INT));
 207         memset(state,0,48*sizeof(MD2_INT));
 208         }
 209
 210 void MD2_Final(md, c)
 211 unsigned char *md;
 212 MD2_CTX *c;
 213         {
 214         int i,v;
 215         register UCHAR *cp;
 216         register MD2_INT *p1,*p2;
 217
 218         cp=c->data;
 219         p1=c->state;
 220         p2=c->cksm;
 221         v=MD2_BLOCK-c->num;
 222         for (i=c->num; i<MD2_BLOCK; i++)
 223                 cp[i]=(UCHAR)v;
 224
 225         md2_block(c,cp);
 226
 227         for (i=0; i<MD2_BLOCK; i++)
 228                 cp[i]=(UCHAR)p2[i];
 229         md2_block(c,cp);
 230
 231         for (i=0; i<16; i++)
 232                 md[i]=(UCHAR)(p1[i]&0xff);
 233         memset((char *)&c,0,sizeof(c));
 234         }
 235