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diff --git a/src/lib/libcrypto/bf/bf_cbc.c b/src/lib/libcrypto/bf/bf_cbc.c
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1/* $OpenBSD: bf_cbc.c,v 1.8 2022/11/26 16:08:51 tb 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
61#include "bf_local.h"
62
63void
64BF_cbc_encrypt(const unsigned char *in, unsigned char *out, long length,
65 const BF_KEY *schedule, unsigned char *ivec, int encrypt)
66{
67 BF_LONG tin0, tin1;
68 BF_LONG tout0, tout1, xor0, xor1;
69 long l = length;
70 BF_LONG tin[2];
71
72 if (encrypt) {
73 n2l(ivec, tout0);
74 n2l(ivec, tout1);
75 ivec -= 8;
76 for (l -= 8; l >= 0; l -= 8) {
77 n2l(in, tin0);
78 n2l(in, tin1);
79 tin0 ^= tout0;
80 tin1 ^= tout1;
81 tin[0] = tin0;
82 tin[1] = tin1;
83 BF_encrypt(tin, schedule);
84 tout0 = tin[0];
85 tout1 = tin[1];
86 l2n(tout0, out);
87 l2n(tout1, out);
88 }
89 if (l != -8) {
90 n2ln(in, tin0, tin1, l + 8);
91 tin0 ^= tout0;
92 tin1 ^= tout1;
93 tin[0] = tin0;
94 tin[1] = tin1;
95 BF_encrypt(tin, schedule);
96 tout0 = tin[0];
97 tout1 = tin[1];
98 l2n(tout0, out);
99 l2n(tout1, out);
100 }
101 l2n(tout0, ivec);
102 l2n(tout1, ivec);
103 } else {
104 n2l(ivec, xor0);
105 n2l(ivec, xor1);
106 ivec -= 8;
107 for (l -= 8; l >= 0; l -= 8) {
108 n2l(in, tin0);
109 n2l(in, tin1);
110 tin[0] = tin0;
111 tin[1] = tin1;
112 BF_decrypt(tin, schedule);
113 tout0 = tin[0]^xor0;
114 tout1 = tin[1]^xor1;
115 l2n(tout0, out);
116 l2n(tout1, out);
117 xor0 = tin0;
118 xor1 = tin1;
119 }
120 if (l != -8) {
121 n2l(in, tin0);
122 n2l(in, tin1);
123 tin[0] = tin0;
124 tin[1] = tin1;
125 BF_decrypt(tin, schedule);
126 tout0 = tin[0]^xor0;
127 tout1 = tin[1]^xor1;
128 l2nn(tout0, tout1, out, l + 8);
129 xor0 = tin0;
130 xor1 = tin1;
131 }
132 l2n(xor0, ivec);
133 l2n(xor1, ivec);
134 }
135 tin0 = tin1 = tout0 = tout1 = xor0 = xor1 = 0;
136 tin[0] = tin[1] = 0;
137}
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