crypto/des/xcbc_enc.c

   1 /* crypto/des/xcbc_enc.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 "des_locl.h"
  60
  61 /* RSA's DESX */
  62
  63 #if 0 /* broken code, preserved just in case anyone specifically looks for this */
  64 static const unsigned char desx_white_in2out[256]={
  65 0xBD,0x56,0xEA,0xF2,0xA2,0xF1,0xAC,0x2A,0xB0,0x93,0xD1,0x9C,0x1B,0x33,0xFD,0xD0,
  66 0x30,0x04,0xB6,0xDC,0x7D,0xDF,0x32,0x4B,0xF7,0xCB,0x45,0x9B,0x31,0xBB,0x21,0x5A,
  67 0x41,0x9F,0xE1,0xD9,0x4A,0x4D,0x9E,0xDA,0xA0,0x68,0x2C,0xC3,0x27,0x5F,0x80,0x36,
  68 0x3E,0xEE,0xFB,0x95,0x1A,0xFE,0xCE,0xA8,0x34,0xA9,0x13,0xF0,0xA6,0x3F,0xD8,0x0C,
  69 0x78,0x24,0xAF,0x23,0x52,0xC1,0x67,0x17,0xF5,0x66,0x90,0xE7,0xE8,0x07,0xB8,0x60,
  70 0x48,0xE6,0x1E,0x53,0xF3,0x92,0xA4,0x72,0x8C,0x08,0x15,0x6E,0x86,0x00,0x84,0xFA,
  71 0xF4,0x7F,0x8A,0x42,0x19,0xF6,0xDB,0xCD,0x14,0x8D,0x50,0x12,0xBA,0x3C,0x06,0x4E,
  72 0xEC,0xB3,0x35,0x11,0xA1,0x88,0x8E,0x2B,0x94,0x99,0xB7,0x71,0x74,0xD3,0xE4,0xBF,
  73 0x3A,0xDE,0x96,0x0E,0xBC,0x0A,0xED,0x77,0xFC,0x37,0x6B,0x03,0x79,0x89,0x62,0xC6,
  74 0xD7,0xC0,0xD2,0x7C,0x6A,0x8B,0x22,0xA3,0x5B,0x05,0x5D,0x02,0x75,0xD5,0x61,0xE3,
  75 0x18,0x8F,0x55,0x51,0xAD,0x1F,0x0B,0x5E,0x85,0xE5,0xC2,0x57,0x63,0xCA,0x3D,0x6C,
  76 0xB4,0xC5,0xCC,0x70,0xB2,0x91,0x59,0x0D,0x47,0x20,0xC8,0x4F,0x58,0xE0,0x01,0xE2,
  77 0x16,0x38,0xC4,0x6F,0x3B,0x0F,0x65,0x46,0xBE,0x7E,0x2D,0x7B,0x82,0xF9,0x40,0xB5,
  78 0x1D,0x73,0xF8,0xEB,0x26,0xC7,0x87,0x97,0x25,0x54,0xB1,0x28,0xAA,0x98,0x9D,0xA5,
  79 0x64,0x6D,0x7A,0xD4,0x10,0x81,0x44,0xEF,0x49,0xD6,0xAE,0x2E,0xDD,0x76,0x5C,0x2F,
  80 0xA7,0x1C,0xC9,0x09,0x69,0x9A,0x83,0xCF,0x29,0x39,0xB9,0xE9,0x4C,0xFF,0x43,0xAB,
  81         };
  82
  83 void DES_xwhite_in2out(const_DES_cblock *des_key, const_DES_cblock *in_white,
  84              DES_cblock *out_white)
  85         {
  86         int out0,out1;
  87         int i;
  88         const unsigned char *key = &(*des_key)[0];
  89         const unsigned char *in = &(*in_white)[0];
  90         unsigned char *out = &(*out_white)[0];
  91
  92         out[0]=out[1]=out[2]=out[3]=out[4]=out[5]=out[6]=out[7]=0;
  93         out0=out1=0;
  94         for (i=0; i<8; i++)
  95                 {
  96                 out[i]=key[i]^desx_white_in2out[out0^out1];
  97                 out0=out1;
  98                 out1=(int)out[i&0x07];
  99                 }
 100
 101         out0=out[0];
 102         out1=out[i]; /* BUG: out-of-bounds read */
 103         for (i=0; i<8; i++)
 104                 {
 105                 out[i]=in[i]^desx_white_in2out[out0^out1];
 106                 out0=out1;
 107                 out1=(int)out[i&0x07];
 108                 }
 109         }
 110 #endif
 111
 112 void DES_xcbc_encrypt(const unsigned char *in, unsigned char *out,
 113                       long length, DES_key_schedule *schedule,
 114                       DES_cblock *ivec, const_DES_cblock *inw,
 115                       const_DES_cblock *outw, int enc)
 116         {
 117         register DES_LONG tin0,tin1;
 118         register DES_LONG tout0,tout1,xor0,xor1;
 119         register DES_LONG inW0,inW1,outW0,outW1;
 120         register const unsigned char *in2;
 121         register long l=length;
 122         DES_LONG tin[2];
 123         unsigned char *iv;
 124
 125         in2 = &(*inw)[0];
 126         c2l(in2,inW0);
 127         c2l(in2,inW1);
 128         in2 = &(*outw)[0];
 129         c2l(in2,outW0);
 130         c2l(in2,outW1);
 131
 132         iv = &(*ivec)[0];
 133
 134         if (enc)
 135                 {
 136                 c2l(iv,tout0);
 137                 c2l(iv,tout1);
 138                 for (l-=8; l>=0; l-=8)
 139                         {
 140                         c2l(in,tin0);
 141                         c2l(in,tin1);
 142                         tin0^=tout0^inW0; tin[0]=tin0;
 143                         tin1^=tout1^inW1; tin[1]=tin1;
 144                         DES_encrypt1(tin,schedule,DES_ENCRYPT);
 145                         tout0=tin[0]^outW0; l2c(tout0,out);
 146                         tout1=tin[1]^outW1; l2c(tout1,out);
 147                         }
 148                 if (l != -8)
 149                         {
 150                         c2ln(in,tin0,tin1,l+8);
 151                         tin0^=tout0^inW0; tin[0]=tin0;
 152                         tin1^=tout1^inW1; tin[1]=tin1;
 153                         DES_encrypt1(tin,schedule,DES_ENCRYPT);
 154                         tout0=tin[0]^outW0; l2c(tout0,out);
 155                         tout1=tin[1]^outW1; l2c(tout1,out);
 156                         }
 157                 iv = &(*ivec)[0];
 158                 l2c(tout0,iv);
 159                 l2c(tout1,iv);
 160                 }
 161         else
 162                 {
 163                 c2l(iv,xor0);
 164                 c2l(iv,xor1);
 165                 for (l-=8; l>0; l-=8)
 166                         {
 167                         c2l(in,tin0); tin[0]=tin0^outW0;
 168                         c2l(in,tin1); tin[1]=tin1^outW1;
 169                         DES_encrypt1(tin,schedule,DES_DECRYPT);
 170                         tout0=tin[0]^xor0^inW0;
 171                         tout1=tin[1]^xor1^inW1;
 172                         l2c(tout0,out);
 173                         l2c(tout1,out);
 174                         xor0=tin0;
 175                         xor1=tin1;
 176                         }
 177                 if (l != -8)
 178                         {
 179                         c2l(in,tin0); tin[0]=tin0^outW0;
 180                         c2l(in,tin1); tin[1]=tin1^outW1;
 181                         DES_encrypt1(tin,schedule,DES_DECRYPT);
 182                         tout0=tin[0]^xor0^inW0;
 183                         tout1=tin[1]^xor1^inW1;
 184                         l2cn(tout0,tout1,out,l+8);
 185                         xor0=tin0;
 186                         xor1=tin1;
 187                         }
 188
 189                 iv = &(*ivec)[0];
 190                 l2c(xor0,iv);
 191                 l2c(xor1,iv);
 192                 }
 193         tin0=tin1=tout0=tout1=xor0=xor1=0;
 194         inW0=inW1=outW0=outW1=0;
 195         tin[0]=tin[1]=0;
 196         }
 197