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/* $OpenBSD: ecb_enc.c,v 1.3 2005/06/13 10:56:44 hshoexer Exp $ */
/* lib/des/ecb_enc.c */
/* Copyright (C) 1995 Eric Young (eay@mincom.oz.au)
* All rights reserved.
*
* This file is part of an SSL implementation written
* by Eric Young (eay@mincom.oz.au).
* The implementation was written so as to conform with Netscapes SSL
* specification. This library and applications are
* FREE FOR COMMERCIAL AND NON-COMMERCIAL USE
* as long as the following conditions are aheared to.
*
* Copyright remains Eric Young's, and as such any Copyright notices in
* the code are not to be removed. If this code is used in a product,
* Eric Young should be given attribution as the author of the parts used.
* This can be in the form of a textual message at program startup or
* in documentation (online or textual) provided with the package.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Eric Young (eay@mincom.oz.au)
*
* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* The licence and distribution terms for any publically available version or
* derivative of this code cannot be changed. i.e. this code cannot simply be
* copied and put under another distribution licence
* [including the GNU Public Licence.]
*/
#include "des_locl.h"
#include "spr.h"
const char *DES_version="libdes v 3.21 - 95/11/21 - eay";
void des_ecb_encrypt(input, output, ks, encrypt)
des_cblock (*input);
des_cblock (*output);
des_key_schedule ks;
int encrypt;
{
register u_int32_t l0,l1;
register unsigned char *in,*out;
u_int32_t ll[2];
in=(unsigned char *)input;
out=(unsigned char *)output;
c2l(in,l0); ll[0]=l0;
c2l(in,l1); ll[1]=l1;
des_encrypt(ll,ks,encrypt);
l0=ll[0]; l2c(l0,out);
l1=ll[1]; l2c(l1,out);
l0=l1=ll[0]=ll[1]=0;
}
void des_encrypt(data, ks, encrypt)
u_int32_t *data;
des_key_schedule ks;
int encrypt;
{
register u_int32_t l,r,t,u;
#ifdef DES_USE_PTR
register unsigned char *des_SP=(unsigned char *)des_SPtrans;
#endif
register int i;
register u_int32_t *s;
u=data[0];
r=data[1];
IP(u,r);
/* Things have been modified so that the initial rotate is
* done outside the loop. This required the
* des_SPtrans values in sp.h to be rotated 1 bit to the right.
* One perl script later and things have a 5% speed up on a sparc2.
* Thanks to Richard Outerbridge <71755.204@CompuServe.COM>
* for pointing this out. */
l=(r<<1)|(r>>31);
r=(u<<1)|(u>>31);
/* clear the top bits on machines with 8byte longs */
l&=0xffffffffL;
r&=0xffffffffL;
s=(u_int32_t *)ks;
/* I don't know if it is worth the effort of loop unrolling the
* inner loop */
if (encrypt)
{
for (i=0; i<32; i+=4)
{
D_ENCRYPT(l,r,i+0); /* 1 */
D_ENCRYPT(r,l,i+2); /* 2 */
}
}
else
{
for (i=30; i>0; i-=4)
{
D_ENCRYPT(l,r,i-0); /* 16 */
D_ENCRYPT(r,l,i-2); /* 15 */
}
}
l=(l>>1)|(l<<31);
r=(r>>1)|(r<<31);
/* clear the top bits on machines with 8byte longs */
l&=0xffffffffL;
r&=0xffffffffL;
FP(r,l);
data[0]=l;
data[1]=r;
l=r=t=u=0;
}
void des_encrypt2(data, ks, encrypt)
u_int32_t *data;
des_key_schedule ks;
int encrypt;
{
register u_int32_t l,r,t,u;
#ifdef DES_USE_PTR
register unsigned char *des_SP=(unsigned char *)des_SPtrans;
#endif
register int i;
register u_int32_t *s;
u=data[0];
r=data[1];
/* Things have been modified so that the initial rotate is
* done outside the loop. This required the
* des_SPtrans values in sp.h to be rotated 1 bit to the right.
* One perl script later and things have a 5% speed up on a sparc2.
* Thanks to Richard Outerbridge <71755.204@CompuServe.COM>
* for pointing this out. */
l=(r<<1)|(r>>31);
r=(u<<1)|(u>>31);
/* clear the top bits on machines with 8byte longs */
l&=0xffffffffL;
r&=0xffffffffL;
s=(u_int32_t *)ks;
/* I don't know if it is worth the effort of loop unrolling the
* inner loop */
if (encrypt)
{
for (i=0; i<32; i+=4)
{
D_ENCRYPT(l,r,i+0); /* 1 */
D_ENCRYPT(r,l,i+2); /* 2 */
}
}
else
{
for (i=30; i>0; i-=4)
{
D_ENCRYPT(l,r,i-0); /* 16 */
D_ENCRYPT(r,l,i-2); /* 15 */
}
}
l=(l>>1)|(l<<31);
r=(r>>1)|(r<<31);
/* clear the top bits on machines with 8byte longs */
l&=0xffffffffL;
r&=0xffffffffL;
data[0]=l;
data[1]=r;
l=r=t=u=0;
}
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