crypto/openssl-0.9.7e/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 <openssl/md2.h>
  63 #include <openssl/opensslv.h>
  64 #include <openssl/crypto.h>
  65
  66 const char *MD2_version="MD2" OPENSSL_VERSION_PTEXT;
  67
  68 /* Implemented from RFC1319 The MD2 Message-Digest Algorithm
  69  */
  70
  71 #define UCHAR   unsigned char
  72
  73 static void md2_block(MD2_CTX *c, const unsigned char *d);
  74 /* The magic S table - I have converted it to hex since it is
  75  * basically just a random byte string. */
  76 static MD2_INT S[256]={
  77         0x29, 0x2E, 0x43, 0xC9, 0xA2, 0xD8, 0x7C, 0x01,
  78         0x3D, 0x36, 0x54, 0xA1, 0xEC, 0xF0, 0x06, 0x13,
  79         0x62, 0xA7, 0x05, 0xF3, 0xC0, 0xC7, 0x73, 0x8C,
  80         0x98, 0x93, 0x2B, 0xD9, 0xBC, 0x4C, 0x82, 0xCA,
  81         0x1E, 0x9B, 0x57, 0x3C, 0xFD, 0xD4, 0xE0, 0x16,
  82         0x67, 0x42, 0x6F, 0x18, 0x8A, 0x17, 0xE5, 0x12,
  83         0xBE, 0x4E, 0xC4, 0xD6, 0xDA, 0x9E, 0xDE, 0x49,
  84         0xA0, 0xFB, 0xF5, 0x8E, 0xBB, 0x2F, 0xEE, 0x7A,
  85         0xA9, 0x68, 0x79, 0x91, 0x15, 0xB2, 0x07, 0x3F,
  86         0x94, 0xC2, 0x10, 0x89, 0x0B, 0x22, 0x5F, 0x21,
  87         0x80, 0x7F, 0x5D, 0x9A, 0x5A, 0x90, 0x32, 0x27,
  88         0x35, 0x3E, 0xCC, 0xE7, 0xBF, 0xF7, 0x97, 0x03,
  89         0xFF, 0x19, 0x30, 0xB3, 0x48, 0xA5, 0xB5, 0xD1,
  90         0xD7, 0x5E, 0x92, 0x2A, 0xAC, 0x56, 0xAA, 0xC6,
  91         0x4F, 0xB8, 0x38, 0xD2, 0x96, 0xA4, 0x7D, 0xB6,
  92         0x76, 0xFC, 0x6B, 0xE2, 0x9C, 0x74, 0x04, 0xF1,
  93         0x45, 0x9D, 0x70, 0x59, 0x64, 0x71, 0x87, 0x20,
  94         0x86, 0x5B, 0xCF, 0x65, 0xE6, 0x2D, 0xA8, 0x02,
  95         0x1B, 0x60, 0x25, 0xAD, 0xAE, 0xB0, 0xB9, 0xF6,
  96         0x1C, 0x46, 0x61, 0x69, 0x34, 0x40, 0x7E, 0x0F,
  97         0x55, 0x47, 0xA3, 0x23, 0xDD, 0x51, 0xAF, 0x3A,
  98         0xC3, 0x5C, 0xF9, 0xCE, 0xBA, 0xC5, 0xEA, 0x26,
  99         0x2C, 0x53, 0x0D, 0x6E, 0x85, 0x28, 0x84, 0x09,
 100         0xD3, 0xDF, 0xCD, 0xF4, 0x41, 0x81, 0x4D, 0x52,
 101         0x6A, 0xDC, 0x37, 0xC8, 0x6C, 0xC1, 0xAB, 0xFA,
 102         0x24, 0xE1, 0x7B, 0x08, 0x0C, 0xBD, 0xB1, 0x4A,
 103         0x78, 0x88, 0x95, 0x8B, 0xE3, 0x63, 0xE8, 0x6D,
 104         0xE9, 0xCB, 0xD5, 0xFE, 0x3B, 0x00, 0x1D, 0x39,
 105         0xF2, 0xEF, 0xB7, 0x0E, 0x66, 0x58, 0xD0, 0xE4,
 106         0xA6, 0x77, 0x72, 0xF8, 0xEB, 0x75, 0x4B, 0x0A,
 107         0x31, 0x44, 0x50, 0xB4, 0x8F, 0xED, 0x1F, 0x1A,
 108         0xDB, 0x99, 0x8D, 0x33, 0x9F, 0x11, 0x83, 0x14,
 109         };
 110
 111 const char *MD2_options(void)
 112         {
 113         if (sizeof(MD2_INT) == 1)
 114                 return("md2(char)");
 115         else
 116                 return("md2(int)");
 117         }
 118
 119 int MD2_Init(MD2_CTX *c)
 120         {
 121         c->num=0;
 122         memset(c->state,0,sizeof c->state);
 123         memset(c->cksm,0,sizeof c->cksm);
 124         memset(c->data,0,sizeof c->data);
 125         return 1;
 126         }
 127
 128 int MD2_Update(MD2_CTX *c, const unsigned char *data, unsigned long len)
 129         {
 130         register UCHAR *p;
 131
 132         if (len == 0) return 1;
 133
 134         p=c->data;
 135         if (c->num != 0)
 136                 {
 137                 if ((c->num+len) >= MD2_BLOCK)
 138                         {
 139                         memcpy(&(p[c->num]),data,MD2_BLOCK-c->num);
 140                         md2_block(c,c->data);
 141                         data+=(MD2_BLOCK - c->num);
 142                         len-=(MD2_BLOCK - c->num);
 143                         c->num=0;
 144                         /* drop through and do the rest */
 145                         }
 146                 else
 147                         {
 148                         memcpy(&(p[c->num]),data,(int)len);
 149                         /* data+=len; */
 150                         c->num+=(int)len;
 151                         return 1;
 152                         }
 153                 }
 154         /* we now can process the input data in blocks of MD2_BLOCK
 155          * chars and save the leftovers to c->data. */
 156         while (len >= MD2_BLOCK)
 157                 {
 158                 md2_block(c,data);
 159                 data+=MD2_BLOCK;
 160                 len-=MD2_BLOCK;
 161                 }
 162         memcpy(p,data,(int)len);
 163         c->num=(int)len;
 164         return 1;
 165         }
 166
 167 static void md2_block(MD2_CTX *c, const unsigned char *d)
 168         {
 169         register MD2_INT t,*sp1,*sp2;
 170         register int i,j;
 171         MD2_INT state[48];
 172
 173         sp1=c->state;
 174         sp2=c->cksm;
 175         j=sp2[MD2_BLOCK-1];
 176         for (i=0; i<16; i++)
 177                 {
 178                 state[i]=sp1[i];
 179                 state[i+16]=t=d[i];
 180                 state[i+32]=(t^sp1[i]);
 181                 j=sp2[i]^=S[t^j];
 182                 }
 183         t=0;
 184         for (i=0; i<18; i++)
 185                 {
 186                 for (j=0; j<48; j+=8)
 187                         {
 188                         t= state[j+ 0]^=S[t];
 189                         t= state[j+ 1]^=S[t];
 190                         t= state[j+ 2]^=S[t];
 191                         t= state[j+ 3]^=S[t];
 192                         t= state[j+ 4]^=S[t];
 193                         t= state[j+ 5]^=S[t];
 194                         t= state[j+ 6]^=S[t];
 195                         t= state[j+ 7]^=S[t];
 196                         }
 197                 t=(t+i)&0xff;
 198                 }
 199         memcpy(sp1,state,16*sizeof(MD2_INT));
 200         OPENSSL_cleanse(state,48*sizeof(MD2_INT));
 201         }
 202
 203 int MD2_Final(unsigned char *md, MD2_CTX *c)
 204         {
 205         int i,v;
 206         register UCHAR *cp;
 207         register MD2_INT *p1,*p2;
 208
 209         cp=c->data;
 210         p1=c->state;
 211         p2=c->cksm;
 212         v=MD2_BLOCK-c->num;
 213         for (i=c->num; i<MD2_BLOCK; i++)
 214                 cp[i]=(UCHAR)v;
 215
 216         md2_block(c,cp);
 217
 218         for (i=0; i<MD2_BLOCK; i++)
 219                 cp[i]=(UCHAR)p2[i];
 220         md2_block(c,cp);
 221
 222         for (i=0; i<16; i++)
 223                 md[i]=(UCHAR)(p1[i]&0xff);
 224         memset((char *)&c,0,sizeof(c));
 225         return 1;
 226         }
 227