Annotation of sys/crypto/ecb_enc.c, Revision 1.1.1.1
1.1 nbrk 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: }
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