Line data Source code
1 : /* $OpenBSD: ecb_enc.c,v 1.6 2015/12/10 21:00:51 naddy Exp $ */
2 :
3 : /* lib/des/ecb_enc.c */
4 : /* Copyright (C) 1995 Eric Young (eay@mincom.oz.au)
5 : * All rights reserved.
6 : *
7 : * This file is part of an SSL implementation written
8 : * by Eric Young (eay@mincom.oz.au).
9 : * The implementation was written so as to conform with Netscapes SSL
10 : * specification. This library and applications are
11 : * FREE FOR COMMERCIAL AND NON-COMMERCIAL USE
12 : * as long as the following conditions are aheared to.
13 : *
14 : * Copyright remains Eric Young's, and as such any Copyright notices in
15 : * the code are not to be removed. If this code is used in a product,
16 : * Eric Young should be given attribution as the author of the parts used.
17 : * This can be in the form of a textual message at program startup or
18 : * in documentation (online or textual) provided with the package.
19 : *
20 : * Redistribution and use in source and binary forms, with or without
21 : * modification, are permitted provided that the following conditions
22 : * are met:
23 : * 1. Redistributions of source code must retain the copyright
24 : * notice, this list of conditions and the following disclaimer.
25 : * 2. Redistributions in binary form must reproduce the above copyright
26 : * notice, this list of conditions and the following disclaimer in the
27 : * documentation and/or other materials provided with the distribution.
28 : * 3. All advertising materials mentioning features or use of this software
29 : * must display the following acknowledgement:
30 : * This product includes software developed by Eric Young (eay@mincom.oz.au)
31 : *
32 : * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
33 : * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
34 : * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
35 : * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
36 : * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
37 : * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
38 : * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
39 : * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
40 : * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
41 : * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
42 : * SUCH DAMAGE.
43 : *
44 : * The licence and distribution terms for any publically available version or
45 : * derivative of this code cannot be changed. i.e. this code cannot simply be
46 : * copied and put under another distribution licence
47 : * [including the GNU Public Licence.]
48 : */
49 :
50 : #include "des_locl.h"
51 : #include "spr.h"
52 :
53 : void
54 0 : des_encrypt2(u_int32_t *data, des_key_schedule ks, int encrypt)
55 : {
56 : register u_int32_t l, r, t, u;
57 : #ifdef DES_USE_PTR
58 : register unsigned char *des_SP=(unsigned char *)des_SPtrans;
59 : #endif
60 : register int i;
61 : register u_int32_t *s;
62 :
63 0 : u = data[0];
64 0 : r = data[1];
65 :
66 : /* Things have been modified so that the initial rotate is
67 : * done outside the loop. This required the
68 : * des_SPtrans values in sp.h to be rotated 1 bit to the right.
69 : * One perl script later and things have a 5% speed up on a sparc2.
70 : * Thanks to Richard Outerbridge <71755.204@CompuServe.COM>
71 : * for pointing this out. */
72 0 : l = (r << 1) | (r >> 31);
73 0 : r = (u << 1) | (u >> 31);
74 :
75 : /* clear the top bits on machines with 8byte longs */
76 0 : l &= 0xffffffffL;
77 0 : r &= 0xffffffffL;
78 :
79 0 : s = (u_int32_t *) ks;
80 : /* I don't know if it is worth the effort of loop unrolling the
81 : * inner loop */
82 0 : if (encrypt) {
83 0 : for (i = 0; i < 32; i += 4) {
84 0 : D_ENCRYPT(l, r, i + 0); /* 1 */
85 0 : D_ENCRYPT(r, l, i + 2); /* 2 */
86 : }
87 : } else {
88 0 : for (i = 30; i > 0; i -= 4) {
89 0 : D_ENCRYPT(l, r, i - 0); /* 16 */
90 0 : D_ENCRYPT(r, l, i - 2); /* 15 */
91 : }
92 : }
93 0 : l = (l >> 1) | (l << 31);
94 0 : r = (r >> 1) | (r << 31);
95 : /* clear the top bits on machines with 8byte longs */
96 0 : l &= 0xffffffffL;
97 0 : r &= 0xffffffffL;
98 :
99 0 : data[0] = l;
100 0 : data[1] = r;
101 : l = r = t = u = 0;
102 0 : }
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