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diff --git a/src/lib/libcrypto/des/cbc_enc.c b/src/lib/libcrypto/des/cbc_enc.c
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1/* $OpenBSD: cbc_enc.c,v 1.5 2024/08/31 14:25:04 jsing 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 "des_local.h"
60
61void
62DES_cbc_encrypt(const unsigned char *in, unsigned char *out, long length,
63 DES_key_schedule *_schedule, DES_cblock *ivec, int enc)
64{
65 DES_LONG tin0, tin1;
66 DES_LONG tout0, tout1, xor0, xor1;
67 long l = length;
68 DES_LONG tin[2];
69 unsigned char *iv;
70
71 iv = &(*ivec)[0];
72
73 if (enc) {
74 c2l(iv, tout0);
75 c2l(iv, tout1);
76 for (l -= 8; l >= 0; l -= 8) {
77 c2l(in, tin0);
78 c2l(in, tin1);
79 tin0 ^= tout0;
80 tin[0] = tin0;
81 tin1 ^= tout1;
82 tin[1] = tin1;
83 DES_encrypt1((DES_LONG *)tin, _schedule, DES_ENCRYPT);
84 tout0 = tin[0];
85 l2c(tout0, out);
86 tout1 = tin[1];
87 l2c(tout1, out);
88 }
89 if (l != -8) {
90 c2ln(in, tin0, tin1, l + 8);
91 tin0 ^= tout0;
92 tin[0] = tin0;
93 tin1 ^= tout1;
94 tin[1] = tin1;
95 DES_encrypt1((DES_LONG *)tin, _schedule, DES_ENCRYPT);
96 tout0 = tin[0];
97 l2c(tout0, out);
98 tout1 = tin[1];
99 l2c(tout1, out);
100 }
101 } else {
102 c2l(iv, xor0);
103 c2l(iv, xor1);
104 for (l -= 8; l >= 0; l -= 8) {
105 c2l(in, tin0);
106 tin[0] = tin0;
107 c2l(in, tin1);
108 tin[1] = tin1;
109 DES_encrypt1((DES_LONG *)tin, _schedule, DES_DECRYPT);
110 tout0 = tin[0] ^ xor0;
111 tout1 = tin[1] ^ xor1;
112 l2c(tout0, out);
113 l2c(tout1, out);
114 xor0 = tin0;
115 xor1 = tin1;
116 }
117 if (l != -8) {
118 c2l(in, tin0);
119 tin[0] = tin0;
120 c2l(in, tin1);
121 tin[1] = tin1;
122 DES_encrypt1((DES_LONG *)tin, _schedule, DES_DECRYPT);
123 tout0 = tin[0] ^ xor0;
124 tout1 = tin[1] ^ xor1;
125 l2cn(tout0, tout1, out, l + 8);
126 }
127 }
128 tin0 = tin1 = tout0 = tout1 = xor0 = xor1 = 0;
129 tin[0] = tin[1] = 0;
130}
131LCRYPTO_ALIAS(DES_cbc_encrypt);
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