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diff --git a/src/lib/libcrypto/des/pcbc_enc.c b/src/lib/libcrypto/des/pcbc_enc.c
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1/* $OpenBSD: pcbc_enc.c,v 1.10 2024/03/29 01:47:29 joshua 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_pcbc_encrypt(const unsigned char *input, unsigned char *output,
63 long length, DES_key_schedule *schedule,
64 DES_cblock *ivec, int enc)
65{
66 DES_LONG sin0, sin1, xor0, xor1, tout0, tout1;
67 DES_LONG tin[2];
68 const unsigned char *in;
69 unsigned char *out, *iv;
70
71 in = input;
72 out = output;
73 iv = &(*ivec)[0];
74
75 if (enc) {
76 c2l(iv, xor0);
77 c2l(iv, xor1);
78 for (; length > 0; length -= 8) {
79 if (length >= 8) {
80 c2l(in, sin0);
81 c2l(in, sin1);
82 } else
83 c2ln(in, sin0, sin1, length);
84 tin[0] = sin0 ^ xor0;
85 tin[1] = sin1 ^ xor1;
86 DES_encrypt1((DES_LONG *)tin, schedule, DES_ENCRYPT);
87 tout0 = tin[0];
88 tout1 = tin[1];
89 xor0 = sin0 ^ tout0;
90 xor1 = sin1 ^ tout1;
91 l2c(tout0, out);
92 l2c(tout1, out);
93 }
94 } else {
95 c2l(iv, xor0);
96 c2l(iv, xor1);
97 for (; length > 0; length -= 8) {
98 c2l(in, sin0);
99 c2l(in, sin1);
100 tin[0] = sin0;
101 tin[1] = sin1;
102 DES_encrypt1((DES_LONG *)tin, schedule, DES_DECRYPT);
103 tout0 = tin[0] ^ xor0;
104 tout1 = tin[1] ^ xor1;
105 if (length >= 8) {
106 l2c(tout0, out);
107 l2c(tout1, out);
108 } else
109 l2cn(tout0, tout1, out, length);
110 xor0 = tout0 ^ sin0;
111 xor1 = tout1 ^ sin1;
112 }
113 }
114 tin[0] = tin[1] = 0;
115 sin0 = sin1 = xor0 = xor1 = tout0 = tout1 = 0;
116}
117LCRYPTO_ALIAS(DES_pcbc_encrypt);