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
des_encrypt2(u_int32_t * data,des_key_schedule ks,int encrypt)54 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 u = data[0];
64 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 l = (r << 1) | (r >> 31);
73 r = (u << 1) | (u >> 31);
74
75 /* clear the top bits on machines with 8byte longs */
76 l &= 0xffffffffL;
77 r &= 0xffffffffL;
78
79 s = (u_int32_t *) ks;
80 /* I don't know if it is worth the effort of loop unrolling the
81 * inner loop */
82 if (encrypt) {
83 for (i = 0; i < 32; i += 4) {
84 D_ENCRYPT(l, r, i + 0); /* 1 */
85 D_ENCRYPT(r, l, i + 2); /* 2 */
86 }
87 } else {
88 for (i = 30; i > 0; i -= 4) {
89 D_ENCRYPT(l, r, i - 0); /* 16 */
90 D_ENCRYPT(r, l, i - 2); /* 15 */
91 }
92 }
93 l = (l >> 1) | (l << 31);
94 r = (r >> 1) | (r << 31);
95 /* clear the top bits on machines with 8byte longs */
96 l &= 0xffffffffL;
97 r &= 0xffffffffL;
98
99 data[0] = l;
100 data[1] = r;
101 l = r = t = u = 0;
102 }
103