1 /* $OpenBSD: ecb_enc.c,v 1.3 2005/06/13 10:56:44 hshoexer 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 const char *DES_version="libdes v 3.21 - 95/11/21 - eay";
54
55 void des_ecb_encrypt(input, output, ks, encrypt)
56 des_cblock (*input);
57 des_cblock (*output);
58 des_key_schedule ks;
59 int encrypt;
60 {
61 register u_int32_t l0,l1;
62 register unsigned char *in,*out;
63 u_int32_t ll[2];
64
65 in=(unsigned char *)input;
66 out=(unsigned char *)output;
67 c2l(in,l0); ll[0]=l0;
68 c2l(in,l1); ll[1]=l1;
69 des_encrypt(ll,ks,encrypt);
70 l0=ll[0]; l2c(l0,out);
71 l1=ll[1]; l2c(l1,out);
72 l0=l1=ll[0]=ll[1]=0;
73 }
74
75 void des_encrypt(data, ks, encrypt)
76 u_int32_t *data;
77 des_key_schedule ks;
78 int encrypt;
79 {
80 register u_int32_t l,r,t,u;
81 #ifdef DES_USE_PTR
82 register unsigned char *des_SP=(unsigned char *)des_SPtrans;
83 #endif
84 register int i;
85 register u_int32_t *s;
86
87 u=data[0];
88 r=data[1];
89
90 IP(u,r);
91 /* Things have been modified so that the initial rotate is
92 * done outside the loop. This required the
93 * des_SPtrans values in sp.h to be rotated 1 bit to the right.
94 * One perl script later and things have a 5% speed up on a sparc2.
95 * Thanks to Richard Outerbridge <71755.204@CompuServe.COM>
96 * for pointing this out. */
97 l=(r<<1)|(r>>31);
98 r=(u<<1)|(u>>31);
99
100 /* clear the top bits on machines with 8byte longs */
101 l&=0xffffffffL;
102 r&=0xffffffffL;
103
104 s=(u_int32_t *)ks;
105 /* I don't know if it is worth the effort of loop unrolling the
106 * inner loop */
107 if (encrypt)
108 {
109 for (i=0; i<32; i+=4)
110 {
111 D_ENCRYPT(l,r,i+0); /* 1 */
112 D_ENCRYPT(r,l,i+2); /* 2 */
113 }
114 }
115 else
116 {
117 for (i=30; i>0; i-=4)
118 {
119 D_ENCRYPT(l,r,i-0); /* 16 */
120 D_ENCRYPT(r,l,i-2); /* 15 */
121 }
122 }
123 l=(l>>1)|(l<<31);
124 r=(r>>1)|(r<<31);
125 /* clear the top bits on machines with 8byte longs */
126 l&=0xffffffffL;
127 r&=0xffffffffL;
128
129 FP(r,l);
130 data[0]=l;
131 data[1]=r;
132 l=r=t=u=0;
133 }
134
135 void des_encrypt2(data, ks, encrypt)
136 u_int32_t *data;
137 des_key_schedule ks;
138 int encrypt;
139 {
140 register u_int32_t l,r,t,u;
141 #ifdef DES_USE_PTR
142 register unsigned char *des_SP=(unsigned char *)des_SPtrans;
143 #endif
144 register int i;
145 register u_int32_t *s;
146
147 u=data[0];
148 r=data[1];
149
150 /* Things have been modified so that the initial rotate is
151 * done outside the loop. This required the
152 * des_SPtrans values in sp.h to be rotated 1 bit to the right.
153 * One perl script later and things have a 5% speed up on a sparc2.
154 * Thanks to Richard Outerbridge <71755.204@CompuServe.COM>
155 * for pointing this out. */
156 l=(r<<1)|(r>>31);
157 r=(u<<1)|(u>>31);
158
159 /* clear the top bits on machines with 8byte longs */
160 l&=0xffffffffL;
161 r&=0xffffffffL;
162
163 s=(u_int32_t *)ks;
164 /* I don't know if it is worth the effort of loop unrolling the
165 * inner loop */
166 if (encrypt)
167 {
168 for (i=0; i<32; i+=4)
169 {
170 D_ENCRYPT(l,r,i+0); /* 1 */
171 D_ENCRYPT(r,l,i+2); /* 2 */
172 }
173 }
174 else
175 {
176 for (i=30; i>0; i-=4)
177 {
178 D_ENCRYPT(l,r,i-0); /* 16 */
179 D_ENCRYPT(r,l,i-2); /* 15 */
180 }
181 }
182 l=(l>>1)|(l<<31);
183 r=(r>>1)|(r<<31);
184 /* clear the top bits on machines with 8byte longs */
185 l&=0xffffffffL;
186 r&=0xffffffffL;
187
188 data[0]=l;
189 data[1]=r;
190 l=r=t=u=0;
191 }