crypto/md2/md2_dgst.c

   1 /* crypto/md2/md2_dgst.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 "md2.h"
  63 #include "opensslv.h"
  64
  65 const char *MD2_version="MD2" OPENSSL_VERSION_PTEXT;
  66
  67 /* Implemented from RFC1319 The MD2 Message-Digest Algorithm
  68  */
  69
  70 #define UCHAR   unsigned char
  71
  72 #ifndef NOPROTO
  73 static void md2_block(MD2_CTX *c, unsigned char *d);
  74 #else
  75 static void md2_block();
  76 #endif
  77
  78 /* The magic S table - I have converted it to hex since it is
  79  * basicaly just a random byte string. */
  80 static MD2_INT S[256]={
  81         0x29, 0x2E, 0x43, 0xC9, 0xA2, 0xD8, 0x7C, 0x01,
  82         0x3D, 0x36, 0x54, 0xA1, 0xEC, 0xF0, 0x06, 0x13,
  83         0x62, 0xA7, 0x05, 0xF3, 0xC0, 0xC7, 0x73, 0x8C,
  84         0x98, 0x93, 0x2B, 0xD9, 0xBC, 0x4C, 0x82, 0xCA,
  85         0x1E, 0x9B, 0x57, 0x3C, 0xFD, 0xD4, 0xE0, 0x16,
  86         0x67, 0x42, 0x6F, 0x18, 0x8A, 0x17, 0xE5, 0x12,
  87         0xBE, 0x4E, 0xC4, 0xD6, 0xDA, 0x9E, 0xDE, 0x49,
  88         0xA0, 0xFB, 0xF5, 0x8E, 0xBB, 0x2F, 0xEE, 0x7A,
  89         0xA9, 0x68, 0x79, 0x91, 0x15, 0xB2, 0x07, 0x3F,
  90         0x94, 0xC2, 0x10, 0x89, 0x0B, 0x22, 0x5F, 0x21,
  91         0x80, 0x7F, 0x5D, 0x9A, 0x5A, 0x90, 0x32, 0x27,
  92         0x35, 0x3E, 0xCC, 0xE7, 0xBF, 0xF7, 0x97, 0x03,
  93         0xFF, 0x19, 0x30, 0xB3, 0x48, 0xA5, 0xB5, 0xD1,
  94         0xD7, 0x5E, 0x92, 0x2A, 0xAC, 0x56, 0xAA, 0xC6,
  95         0x4F, 0xB8, 0x38, 0xD2, 0x96, 0xA4, 0x7D, 0xB6,
  96         0x76, 0xFC, 0x6B, 0xE2, 0x9C, 0x74, 0x04, 0xF1,
  97         0x45, 0x9D, 0x70, 0x59, 0x64, 0x71, 0x87, 0x20,
  98         0x86, 0x5B, 0xCF, 0x65, 0xE6, 0x2D, 0xA8, 0x02,
  99         0x1B, 0x60, 0x25, 0xAD, 0xAE, 0xB0, 0xB9, 0xF6,
 100         0x1C, 0x46, 0x61, 0x69, 0x34, 0x40, 0x7E, 0x0F,
 101         0x55, 0x47, 0xA3, 0x23, 0xDD, 0x51, 0xAF, 0x3A,
 102         0xC3, 0x5C, 0xF9, 0xCE, 0xBA, 0xC5, 0xEA, 0x26,
 103         0x2C, 0x53, 0x0D, 0x6E, 0x85, 0x28, 0x84, 0x09,
 104         0xD3, 0xDF, 0xCD, 0xF4, 0x41, 0x81, 0x4D, 0x52,
 105         0x6A, 0xDC, 0x37, 0xC8, 0x6C, 0xC1, 0xAB, 0xFA,
 106         0x24, 0xE1, 0x7B, 0x08, 0x0C, 0xBD, 0xB1, 0x4A,
 107         0x78, 0x88, 0x95, 0x8B, 0xE3, 0x63, 0xE8, 0x6D,
 108         0xE9, 0xCB, 0xD5, 0xFE, 0x3B, 0x00, 0x1D, 0x39,
 109         0xF2, 0xEF, 0xB7, 0x0E, 0x66, 0x58, 0xD0, 0xE4,
 110         0xA6, 0x77, 0x72, 0xF8, 0xEB, 0x75, 0x4B, 0x0A,
 111         0x31, 0x44, 0x50, 0xB4, 0x8F, 0xED, 0x1F, 0x1A,
 112         0xDB, 0x99, 0x8D, 0x33, 0x9F, 0x11, 0x83, 0x14,
 113         };
 114
 115 const char *MD2_options()
 116         {
 117         if (sizeof(MD2_INT) == 1)
 118                 return("md2(char)");
 119         else
 120                 return("md2(int)");
 121         }
 122
 123 void MD2_Init(c)
 124 MD2_CTX *c;
 125         {
 126         c->num=0;
 127         memset(c->state,0,MD2_BLOCK*sizeof(MD2_INT));
 128         memset(c->cksm,0,MD2_BLOCK*sizeof(MD2_INT));
 129         memset(c->data,0,MD2_BLOCK);
 130         }
 131
 132 void MD2_Update(c, data, len)
 133 MD2_CTX *c;
 134 register unsigned char *data;
 135 unsigned long len;
 136         {
 137         register UCHAR *p;
 138
 139         if (len == 0) return;
 140
 141         p=c->data;
 142         if (c->num != 0)
 143                 {
 144                 if ((c->num+len) >= MD2_BLOCK)
 145                         {
 146                         memcpy(&(p[c->num]),data,MD2_BLOCK-c->num);
 147                         md2_block(c,c->data);
 148                         data+=(MD2_BLOCK - c->num);
 149                         len-=(MD2_BLOCK - c->num);
 150                         c->num=0;
 151                         /* drop through and do the rest */
 152                         }
 153                 else
 154                         {
 155                         memcpy(&(p[c->num]),data,(int)len);
 156                         /* data+=len; */
 157                         c->num+=(int)len;
 158                         return;
 159                         }
 160                 }
 161         /* we now can process the input data in blocks of MD2_BLOCK
 162          * chars and save the leftovers to c->data. */
 163         while (len >= MD2_BLOCK)
 164                 {
 165                 md2_block(c,data);
 166                 data+=MD2_BLOCK;
 167                 len-=MD2_BLOCK;
 168                 }
 169         memcpy(p,data,(int)len);
 170         c->num=(int)len;
 171         }
 172
 173 static void md2_block(c, d)
 174 MD2_CTX *c;
 175 unsigned char *d;
 176         {
 177         register MD2_INT t,*sp1,*sp2;
 178         register int i,j;
 179         MD2_INT state[48];
 180
 181         sp1=c->state;
 182         sp2=c->cksm;
 183         j=sp2[MD2_BLOCK-1];
 184         for (i=0; i<16; i++)
 185                 {
 186                 state[i]=sp1[i];
 187                 state[i+16]=t=d[i];
 188                 state[i+32]=(t^sp1[i]);
 189                 j=sp2[i]^=S[t^j];
 190                 }
 191         t=0;
 192         for (i=0; i<18; i++)
 193                 {
 194                 for (j=0; j<48; j+=8)
 195                         {
 196                         t= state[j+ 0]^=S[t];
 197                         t= state[j+ 1]^=S[t];
 198                         t= state[j+ 2]^=S[t];
 199                         t= state[j+ 3]^=S[t];
 200                         t= state[j+ 4]^=S[t];
 201                         t= state[j+ 5]^=S[t];
 202                         t= state[j+ 6]^=S[t];
 203                         t= state[j+ 7]^=S[t];
 204                         }
 205                 t=(t+i)&0xff;
 206                 }
 207         memcpy(sp1,state,16*sizeof(MD2_INT));
 208         memset(state,0,48*sizeof(MD2_INT));
 209         }
 210
 211 void MD2_Final(md, c)
 212 unsigned char *md;
 213 MD2_CTX *c;
 214         {
 215         int i,v;
 216         register UCHAR *cp;
 217         register MD2_INT *p1,*p2;
 218
 219         cp=c->data;
 220         p1=c->state;
 221         p2=c->cksm;
 222         v=MD2_BLOCK-c->num;
 223         for (i=c->num; i<MD2_BLOCK; i++)
 224                 cp[i]=(UCHAR)v;
 225
 226         md2_block(c,cp);
 227
 228         for (i=0; i<MD2_BLOCK; i++)
 229                 cp[i]=(UCHAR)p2[i];
 230         md2_block(c,cp);
 231
 232         for (i=0; i<16; i++)
 233                 md[i]=(UCHAR)(p1[i]&0xff);
 234         memset((char *)&c,0,sizeof(c));
 235         }
 236