PandA-2024.02
bf_cfb64.c
Go to the documentation of this file.
1 /*
2 +--------------------------------------------------------------------------+
3 | CHStone : a suite of benchmark programs for C-based High-Level Synthesis |
4 | ======================================================================== |
5 | |
6 | * Collected and Modified : Y. Hara, H. Tomiyama, S. Honda, |
7 | H. Takada and K. Ishii |
8 | Nagoya University, Japan |
9 | |
10 | * Remark : |
11 | 1. This source code is modified to unify the formats of the benchmark |
12 | programs in CHStone. |
13 | 2. Test vectors are added for CHStone. |
14 | 3. If "main_result" is 0 at the end of the program, the program is |
15 | correctly executed. |
16 | 4. Please follow the copyright of each benchmark program. |
17 +--------------------------------------------------------------------------+
18 */
19 /* crypto/bf/bf_cfb64.c */
20 /* Copyright (C) 1995-1997 Eric Young (eay@mincom.oz.au)
21  * All rights reserved.
22  *
23  * This package is an SSL implementation written
24  * by Eric Young (eay@mincom.oz.au).
25  * The implementation was written so as to conform with Netscapes SSL.
26  *
27  * This library is free for commercial and non-commercial use as long as
28  * the following conditions are aheared to. The following conditions
29  * apply to all code found in this distribution, be it the RC4, RSA,
30  * lhash, DES, etc., code; not just the SSL code. The SSL documentation
31  * included with this distribution is covered by the same copyright terms
32  * except that the holder is Tim Hudson (tjh@mincom.oz.au).
33  *
34  * Copyright remains Eric Young's, and as such any Copyright notices in
35  * the code are not to be removed.
36  * If this package is used in a product, Eric Young should be given attribution
37  * as the author of the parts of the library used.
38  * This can be in the form of a textual message at program startup or
39  * in documentation (online or textual) provided with the package.
40  *
41  * Redistribution and use in source and binary forms, with or without
42  * modification, are permitted provided that the following conditions
43  * are met:
44  * 1. Redistributions of source code must retain the copyright
45  * notice, this list of conditions and the following disclaimer.
46  * 2. Redistributions in binary form must reproduce the above copyright
47  * notice, this list of conditions and the following disclaimer in the
48  * documentation and/or other materials provided with the distribution.
49  * 3. All advertising materials mentioning features or use of this software
50  * must display the following acknowledgement:
51  * "This product includes cryptographic software written by
52  * Eric Young (eay@mincom.oz.au)"
53  * The word 'cryptographic' can be left out if the rouines from the library
54  * being used are not cryptographic related :-).
55  * 4. If you include any Windows specific code (or a derivative thereof) from
56  * the apps directory (application code) you must include an acknowledgement:
57  * "This product includes software written by Tim Hudson (tjh@mincom.oz.au)"
58  *
59  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
60  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
61  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
62  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
63  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
64  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
65  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
66  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
67  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
68  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
69  * SUCH DAMAGE.
70  *
71  * The licence and distribution terms for any publically available version or
72  * derivative of this code cannot be changed. i.e. this code cannot simply be
73  * copied and put under another distribution licence
74  * [including the GNU Public Licence.]
75  */
76 /* The input and output encrypted as though 64bit cfb mode is being
77  * used. The extra state information to record how much of the
78  * 64bit block we have used is contained in *num;
79  */
80 
81 void
82 BF_cfb64_encrypt (in, out, length, ivec, num, encrypt)
83  unsigned char *in;
84  unsigned char *out;
85  long length;
86  unsigned char *ivec;
87  int *num;
88  int encrypt;
89 {
90  register BF_LONG v0, v1, t;
91  register int n;
92  register long l;
93  BF_LONG ti[2];
94  unsigned char *iv, c, cc;
95 
96  n = *num;
97  l = length;
98  iv = (unsigned char *) ivec;
99  if (encrypt)
100  {
101  while (l--)
102  {
103  if (n == 0)
104  {
105  n2l (iv, v0);
106  ti[0] = v0;
107  n2l (iv, v1);
108  ti[1] = v1;
109  BF_encrypt ((unsigned long *) ti, BF_ENCRYPT);
110  iv = (unsigned char *) ivec;
111  t = ti[0];
112  l2n (t, iv);
113  t = ti[1];
114  l2n (t, iv);
115 
116  iv = (unsigned char *) ivec;
117  }
118  c = *(in++) ^ iv[n];
119  *(out++) = c;
120  iv[n] = c;
121  n = (n + 1) & 0x07;
122  }
123  }
124  else
125  {
126  while (l--)
127  {
128  if (n == 0)
129  {
130  n2l (iv, v0);
131  ti[0] = v0;
132  n2l (iv, v1);
133  ti[1] = v1;
134  BF_encrypt ((unsigned long *) ti, BF_ENCRYPT);
135  iv = (unsigned char *) ivec;
136  t = ti[0];
137  l2n (t, iv);
138  t = ti[1];
139  l2n (t, iv);
140  iv = (unsigned char *) ivec;
141  }
142  cc = *(in++);
143  c = iv[n];
144  iv[n] = cc;
145  *(out++) = c ^ cc;
146  n = (n + 1) & 0x07;
147  }
148  }
149  v0 = v1 = ti[0] = ti[1] = t = c = cc = 0;
150  *num = n;
151 }
#define BF_LONG
Definition: blowfish.h:86
#define n2l(c, l)
Definition: bf_locl.h:85
#define BF_ENCRYPT
Definition: blowfish.h:80
void BF_cfb64_encrypt(unsigned char *in, unsigned char *out, long length, unsigned char *ivec, int *num, int encrypt)
Definition: bf_cfb64.c:82
int encrypt(int *, int *, int)
void BF_encrypt(BF_LONG *data, int encrypt)
Definition: bf_enc.c:82
#define l2n(l, c)
Definition: bf_locl.h:91

Generated on Mon Feb 12 2024 13:02:48 for PandA-2024.02 by doxygen 1.8.13