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authorjsing <>2024-03-27 12:54:42 +0000
committerjsing <>2024-03-27 12:54:42 +0000
commit139a4095bb73b0cec0c6e513fb6c5321e9308b8b (patch)
tree6b1943c4f5515896596487d1c4ab719428e797c1 /src/lib/libcrypto/rc4/rc4_skey.c
parentfa47f9b2c9e10ca57d1333a9d9d84269455b0b4d (diff)
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Consolidate rc4 code.
Discussed with tb@
Diffstat (limited to 'src/lib/libcrypto/rc4/rc4_skey.c')
-rw-r--r--src/lib/libcrypto/rc4/rc4_skey.c97
1 files changed, 0 insertions, 97 deletions
diff --git a/src/lib/libcrypto/rc4/rc4_skey.c b/src/lib/libcrypto/rc4/rc4_skey.c
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1/* $OpenBSD: rc4_skey.c,v 1.17 2024/03/27 12:14:35 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 <openssl/rc4.h>
60
61/* RC4 as implemented from a posting from
62 * Newsgroups: sci.crypt
63 * From: sterndark@netcom.com (David Sterndark)
64 * Subject: RC4 Algorithm revealed.
65 * Message-ID: <sternCvKL4B.Hyy@netcom.com>
66 * Date: Wed, 14 Sep 1994 06:35:31 GMT
67 */
68
69void
70RC4_set_key(RC4_KEY *key, int len, const unsigned char *data)
71{
72 RC4_INT tmp;
73 int id1, id2;
74 RC4_INT *d;
75 unsigned int i;
76
77 d = &(key->data[0]);
78 key->x = 0;
79 key->y = 0;
80 id1 = id2 = 0;
81
82#define SK_LOOP(d,n) { \
83 tmp=d[(n)]; \
84 id2 = (data[id1] + tmp + id2) & 0xff; \
85 if (++id1 == len) id1=0; \
86 d[(n)]=d[id2]; \
87 d[id2]=tmp; }
88
89 for (i = 0; i < 256; i++)
90 d[i] = i;
91 for (i = 0; i < 256; i += 4) {
92 SK_LOOP(d, i + 0);
93 SK_LOOP(d, i + 1);
94 SK_LOOP(d, i + 2);
95 SK_LOOP(d, i + 3);
96 }
97}