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bf_cfb64.c

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1/* $OpenBSD: bf_cfb64.c,v 1.5 2014/10/28 07:35:58 jsg Exp $ */-
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 cfb 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-
67void BF_cfb64_encrypt(const unsigned char *in, unsigned char *out, long length,-
68 const BF_KEY *schedule, unsigned char *ivec, int *num, int encrypt)-
69 {-
70 BF_LONG v0,v1,t;-
71 int n= *num;-
72 long l=length;-
73 BF_LONG ti[2];-
74 unsigned char *iv,c,cc;-
75-
76 iv=(unsigned char *)ivec;-
77 if (encrypt)
encryptDescription
TRUEevaluated 4 times by 2 tests
Evaluated by:
  • bftest
  • libcrypto.so.44.0.1
FALSEevaluated 4 times by 2 tests
Evaluated by:
  • bftest
  • libcrypto.so.44.0.1
4
78 {-
79 while (l--)
l--Description
TRUEevaluated 1805 times by 2 tests
Evaluated by:
  • bftest
  • libcrypto.so.44.0.1
FALSEevaluated 4 times by 2 tests
Evaluated by:
  • bftest
  • libcrypto.so.44.0.1
4-1805
80 {-
81 if (n == 0)
n == 0Description
TRUEevaluated 226 times by 2 tests
Evaluated by:
  • bftest
  • libcrypto.so.44.0.1
FALSEevaluated 1579 times by 2 tests
Evaluated by:
  • bftest
  • libcrypto.so.44.0.1
226-1579
82 {-
83 n2l(iv,v0); ti[0]=v0;-
84 n2l(iv,v1); ti[1]=v1;-
85 BF_encrypt((BF_LONG *)ti,schedule);-
86 iv=(unsigned char *)ivec;-
87 t=ti[0]; l2n(t,iv);-
88 t=ti[1]; l2n(t,iv);-
89 iv=(unsigned char *)ivec;-
90 }
executed 226 times by 2 tests: end of block
Executed by:
  • bftest
  • libcrypto.so.44.0.1
226
91 c= *(in++)^iv[n];-
92 *(out++)=c;-
93 iv[n]=c;-
94 n=(n+1)&0x07;-
95 }
executed 1805 times by 2 tests: end of block
Executed by:
  • bftest
  • libcrypto.so.44.0.1
1805
96 }
executed 4 times by 2 tests: end of block
Executed by:
  • bftest
  • libcrypto.so.44.0.1
4
97 else-
98 {-
99 while (l--)
l--Description
TRUEevaluated 1805 times by 2 tests
Evaluated by:
  • bftest
  • libcrypto.so.44.0.1
FALSEevaluated 4 times by 2 tests
Evaluated by:
  • bftest
  • libcrypto.so.44.0.1
4-1805
100 {-
101 if (n == 0)
n == 0Description
TRUEevaluated 226 times by 2 tests
Evaluated by:
  • bftest
  • libcrypto.so.44.0.1
FALSEevaluated 1579 times by 2 tests
Evaluated by:
  • bftest
  • libcrypto.so.44.0.1
226-1579
102 {-
103 n2l(iv,v0); ti[0]=v0;-
104 n2l(iv,v1); ti[1]=v1;-
105 BF_encrypt((BF_LONG *)ti,schedule);-
106 iv=(unsigned char *)ivec;-
107 t=ti[0]; l2n(t,iv);-
108 t=ti[1]; l2n(t,iv);-
109 iv=(unsigned char *)ivec;-
110 }
executed 226 times by 2 tests: end of block
Executed by:
  • bftest
  • libcrypto.so.44.0.1
226
111 cc= *(in++);-
112 c=iv[n];-
113 iv[n]=cc;-
114 *(out++)=c^cc;-
115 n=(n+1)&0x07;-
116 }
executed 1805 times by 2 tests: end of block
Executed by:
  • bftest
  • libcrypto.so.44.0.1
1805
117 }
executed 4 times by 2 tests: end of block
Executed by:
  • bftest
  • libcrypto.so.44.0.1
4
118 v0=v1=ti[0]=ti[1]=t=c=cc=0;-
119 *num=n;-
120 }
executed 8 times by 2 tests: end of block
Executed by:
  • bftest
  • libcrypto.so.44.0.1
8
121-
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