LCOV - code coverage report
Current view: top level - bf - bf_ofb64.c (source / functions) Hit Total Coverage
Test: lcov_coverage_final.info Lines: 30 30 100.0 %
Date: 2014-08-02 Functions: 1 1 100.0 %
Branches: 5 6 83.3 %

           Branch data     Line data    Source code
       1                 :            : /* crypto/bf/bf_ofb64.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 <openssl/blowfish.h>
      60                 :            : #include "bf_locl.h"
      61                 :            : 
      62                 :            : /* The input and output encrypted as though 64bit ofb mode is being
      63                 :            :  * used.  The extra state information to record how much of the
      64                 :            :  * 64bit block we have used is contained in *num;
      65                 :            :  */
      66                 :         36 : void BF_ofb64_encrypt(const unsigned char *in, unsigned char *out, long length,
      67                 :            :              const BF_KEY *schedule, unsigned char *ivec, int *num)
      68                 :            :         {
      69                 :            :         register BF_LONG v0,v1,t;
      70                 :         36 :         register int n= *num;
      71                 :         36 :         register long l=length;
      72                 :            :         unsigned char d[8];
      73                 :            :         register char *dp;
      74                 :            :         BF_LONG ti[2];
      75                 :            :         unsigned char *iv;
      76                 :         36 :         int save=0;
      77                 :            : 
      78                 :         36 :         iv=(unsigned char *)ivec;
      79                 :         36 :         n2l(iv,v0);
      80                 :         36 :         n2l(iv,v1);
      81                 :         36 :         ti[0]=v0;
      82                 :         36 :         ti[1]=v1;
      83                 :         36 :         dp=(char *)d;
      84                 :         36 :         l2n(v0,dp);
      85                 :         36 :         l2n(v1,dp);
      86         [ +  + ]:       4158 :         while (l--)
      87                 :            :                 {
      88         [ +  + ]:       4122 :                 if (n == 0)
      89                 :            :                         {
      90                 :        516 :                         BF_encrypt((BF_LONG *)ti,schedule);
      91                 :        516 :                         dp=(char *)d;
      92                 :        516 :                         t=ti[0]; l2n(t,dp);
      93                 :        516 :                         t=ti[1]; l2n(t,dp);
      94                 :        516 :                         save++;
      95                 :            :                         }
      96                 :       4122 :                 *(out++)= *(in++)^d[n];
      97                 :       4122 :                 n=(n+1)&0x07;
      98                 :            :                 }
      99         [ +  - ]:         36 :         if (save)
     100                 :            :                 {
     101                 :         36 :                 v0=ti[0];
     102                 :         36 :                 v1=ti[1];
     103                 :         36 :                 iv=(unsigned char *)ivec;
     104                 :         36 :                 l2n(v0,iv);
     105                 :         36 :                 l2n(v1,iv);
     106                 :            :                 }
     107                 :         36 :         t=v0=v1=ti[0]=ti[1]=0;
     108                 :         36 :         *num=n;
     109                 :         36 :         }
     110                 :            : 

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