LCOV - code coverage report
Current view: top level - des - xcbc_enc.c (source / functions) Hit Total Coverage
Test: lcov_coverage_final.info Lines: 57 57 100.0 %
Date: 2014-08-02 Functions: 1 1 100.0 %
Branches: 12 28 42.9 %

           Branch data     Line data    Source code
       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                 :         64 : 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                 :         64 :         register long l=length;
     122                 :            :         DES_LONG tin[2];
     123                 :            :         unsigned char *iv;
     124                 :            : 
     125                 :         64 :         in2 = &(*inw)[0];
     126                 :         64 :         c2l(in2,inW0);
     127                 :         64 :         c2l(in2,inW1);
     128                 :         64 :         in2 = &(*outw)[0];
     129                 :         64 :         c2l(in2,outW0);
     130                 :         64 :         c2l(in2,outW1);
     131                 :            : 
     132                 :         64 :         iv = &(*ivec)[0];
     133                 :            : 
     134         [ +  + ]:         64 :         if (enc)
     135                 :            :                 {
     136                 :         36 :                 c2l(iv,tout0);
     137                 :         36 :                 c2l(iv,tout1);
     138         [ +  + ]:        299 :                 for (l-=8; l>=0; l-=8)
     139                 :            :                         {
     140                 :        263 :                         c2l(in,tin0);
     141                 :        263 :                         c2l(in,tin1);
     142                 :        263 :                         tin0^=tout0^inW0; tin[0]=tin0;
     143                 :        263 :                         tin1^=tout1^inW1; tin[1]=tin1;
     144                 :        263 :                         DES_encrypt1(tin,schedule,DES_ENCRYPT);
     145                 :        263 :                         tout0=tin[0]^outW0; l2c(tout0,out);
     146                 :        263 :                         tout1=tin[1]^outW1; l2c(tout1,out);
     147                 :            :                         }
     148         [ +  + ]:         36 :                 if (l != -8)
     149                 :            :                         {
     150   [ -  -  -  +  :          1 :                         c2ln(in,tin0,tin1,l+8);
             -  -  -  -  
                      - ]
     151                 :          1 :                         tin0^=tout0^inW0; tin[0]=tin0;
     152                 :          1 :                         tin1^=tout1^inW1; tin[1]=tin1;
     153                 :          1 :                         DES_encrypt1(tin,schedule,DES_ENCRYPT);
     154                 :          1 :                         tout0=tin[0]^outW0; l2c(tout0,out);
     155                 :          1 :                         tout1=tin[1]^outW1; l2c(tout1,out);
     156                 :            :                         }
     157                 :         36 :                 iv = &(*ivec)[0];
     158                 :         36 :                 l2c(tout0,iv);
     159                 :         36 :                 l2c(tout1,iv);
     160                 :            :                 }
     161                 :            :         else
     162                 :            :                 {
     163                 :         28 :                 c2l(iv,xor0);
     164                 :         28 :                 c2l(iv,xor1);
     165         [ +  + ]:        264 :                 for (l-=8; l>0; l-=8)
     166                 :            :                         {
     167                 :        236 :                         c2l(in,tin0); tin[0]=tin0^outW0;
     168                 :        236 :                         c2l(in,tin1); tin[1]=tin1^outW1;
     169                 :        236 :                         DES_encrypt1(tin,schedule,DES_DECRYPT);
     170                 :        236 :                         tout0=tin[0]^xor0^inW0;
     171                 :        236 :                         tout1=tin[1]^xor1^inW1;
     172                 :        236 :                         l2c(tout0,out);
     173                 :        236 :                         l2c(tout1,out);
     174                 :        236 :                         xor0=tin0;
     175                 :        236 :                         xor1=tin1;
     176                 :            :                         }
     177         [ +  - ]:         28 :                 if (l != -8)
     178                 :            :                         {
     179                 :         28 :                         c2l(in,tin0); tin[0]=tin0^outW0;
     180                 :         28 :                         c2l(in,tin1); tin[1]=tin1^outW1;
     181                 :         28 :                         DES_encrypt1(tin,schedule,DES_DECRYPT);
     182                 :         28 :                         tout0=tin[0]^xor0^inW0;
     183                 :         28 :                         tout1=tin[1]^xor1^inW1;
     184   [ +  -  -  +  :         28 :                         l2cn(tout0,tout1,out,l+8);
             -  -  -  -  
                      - ]
     185                 :         28 :                         xor0=tin0;
     186                 :         28 :                         xor1=tin1;
     187                 :            :                         }
     188                 :            : 
     189                 :         28 :                 iv = &(*ivec)[0];
     190                 :         28 :                 l2c(xor0,iv);
     191                 :         28 :                 l2c(xor1,iv);
     192                 :            :                 }
     193                 :         64 :         tin0=tin1=tout0=tout1=xor0=xor1=0;
     194                 :         64 :         inW0=inW1=outW0=outW1=0;
     195                 :            :         tin[0]=tin[1]=0;
     196                 :         64 :         }
     197                 :            : 

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