des_enc.c revision 7c478bd95313f5f23a4c958a745db2134aa03244
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
* All rights reserved.
*
* This package is an SSL implementation written
* by Eric Young (eay@cryptsoft.com).
* The implementation was written so as to conform with Netscapes SSL.
*
* This library is free for commercial and non-commercial use as long as
* the following conditions are aheared to. The following conditions
* apply to all code found in this distribution, be it the RC4, RSA,
* lhash, DES, etc., code; not just the SSL code. The SSL documentation
* included with this distribution is covered by the same copyright terms
* except that the holder is Tim Hudson (tjh@cryptsoft.com).
*
* Copyright remains Eric Young's, and as such any Copyright notices in
* the code are not to be removed.
* If this package is used in a product, Eric Young should be given attribution
* as the author of the parts of the library 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
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* "This product includes cryptographic software written by
* Eric Young (eay@cryptsoft.com)"
* The word 'cryptographic' can be left out if the rouines from the library
* being used are not cryptographic related :-).
* 4. If you include any Windows specific code (or a derivative thereof) from
* the apps directory (application code) you must include an acknowledgement:
* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
*
* 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"
{
register DES_LONG l,r,t,u;
#ifdef DES_PTR
register const unsigned char *des_SP=(const unsigned char *)DES_SPtrans;
#endif
#ifndef DES_UNROLL
register int i;
#endif
register DES_LONG *s;
r=data[0];
l=data[1];
IP(r,l);
/* 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. */
/* clear the top bits on machines with 8byte longs */
/* shift left by 2 */
/* I don't know if it is worth the effort of loop unrolling the
* inner loop */
if (enc)
{
#ifdef DES_UNROLL
D_ENCRYPT(l,r, 0); /* 1 */
#else
for (i=0; i<32; i+=8)
{
D_ENCRYPT(l,r,i+0); /* 1 */
}
#endif
}
else
{
#ifdef DES_UNROLL
D_ENCRYPT(r,l, 0); /* 1 */
#else
for (i=30; i>0; i-=8)
{
D_ENCRYPT(l,r,i-0); /* 16 */
}
#endif
}
/* rotate and clear the top bits on machines with 8byte longs */
FP(r,l);
data[0]=l;
data[1]=r;
l=r=t=u=0;
}
{
register DES_LONG l,r,t,u;
#ifdef DES_PTR
register const unsigned char *des_SP=(const unsigned char *)DES_SPtrans;
#endif
#ifndef DES_UNROLL
register int i;
#endif
register DES_LONG *s;
r=data[0];
l=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. */
/* clear the top bits on machines with 8byte longs */
/* I don't know if it is worth the effort of loop unrolling the
* inner loop */
if (enc)
{
#ifdef DES_UNROLL
D_ENCRYPT(l,r, 0); /* 1 */
#else
for (i=0; i<32; i+=8)
{
D_ENCRYPT(l,r,i+0); /* 1 */
}
#endif
}
else
{
#ifdef DES_UNROLL
D_ENCRYPT(r,l, 0); /* 1 */
#else
for (i=30; i>0; i-=8)
{
D_ENCRYPT(l,r,i-0); /* 16 */
}
#endif
}
/* rotate and clear the top bits on machines with 8byte longs */
l=r=t=u=0;
}
{
register DES_LONG l,r;
l=data[0];
r=data[1];
IP(l,r);
data[0]=l;
data[1]=r;
l=data[0];
r=data[1];
FP(r,l);
data[0]=l;
data[1]=r;
}
{
register DES_LONG l,r;
l=data[0];
r=data[1];
IP(l,r);
data[0]=l;
data[1]=r;
l=data[0];
r=data[1];
FP(r,l);
data[0]=l;
data[1]=r;
}
#ifndef DES_DEFAULT_OPTIONS
#include "ncbc_enc.c" /* DES_ncbc_encrypt */
{
register const unsigned char *in;
unsigned char *out;
register long l=length;
unsigned char *iv;
if (enc)
{
for (l-=8; l>=0; l-=8)
{
}
if (l != -8)
{
}
}
else
{
for (l-=8; l>=0; l-=8)
{
}
if (l != -8)
{
}
}
}
#endif /* DES_DEFAULT_OPTIONS */