/* ede_cbcm_enc.c *//* Written by Ben Laurie <ben@algroup.co.uk> for the OpenSSL * project 13 Feb 1999. *//* ==================================================================== * Copyright (c) 1999 The OpenSSL Project.  All rights reserved. * * 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 above 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 acknowledgment: *    "This product includes software developed by the OpenSSL Project *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" * * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to *    endorse or promote products derived from this software without *    prior written permission. For written permission, please contact *    licensing@OpenSSL.org. * * 5. Products derived from this software may not be called "OpenSSL" *    nor may "OpenSSL" appear in their names without prior written *    permission of the OpenSSL Project. * * 6. Redistributions of any form whatsoever must retain the following *    acknowledgment: *    "This product includes software developed by the OpenSSL Project *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" * * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY * EXPRESSED 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 OpenSSL PROJECT OR * ITS 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. * ==================================================================== * * This product includes cryptographic software written by Eric Young * (eay@cryptsoft.com).  This product includes software written by Tim * Hudson (tjh@cryptsoft.com). * *//*This is an implementation of Triple DES Cipher Block Chaining with OutputFeedback Masking, by Coppersmith, Johnson and Matyas, (IBM and Certicom).Note that there is a known attack on this by Biham and Knudsen but it takesa lot of work:http://www.cs.technion.ac.il/users/wwwb/cgi-bin/tr-get.cgi/1998/CS/CS0928.ps.gz*/#ifndef OPENSSL_NO_DESCBCM#include "des_locl.h"void DES_ede3_cbcm_encrypt(const unsigned char *in, unsigned char *out,	     long length, DES_key_schedule *ks1, DES_key_schedule *ks2,	     DES_key_schedule *ks3, DES_cblock *ivec1, DES_cblock *ivec2,	     int enc)    {    register DES_LONG tin0,tin1;    register DES_LONG tout0,tout1,xor0,xor1,m0,m1;    register long l=length;    DES_LONG tin[2];    unsigned char *iv1,*iv2;    iv1 = &(*ivec1)[0];    iv2 = &(*ivec2)[0];    if (enc)	{	c2l(iv1,m0);	c2l(iv1,m1);	c2l(iv2,tout0);	c2l(iv2,tout1);	for (l-=8; l>=-7; l-=8)	    {	    tin[0]=m0;	    tin[1]=m1;	    DES_encrypt1(tin,ks3,1);	    m0=tin[0];	    m1=tin[1];	    if(l < 0)		{		c2ln(in,tin0,tin1,l+8);		}	    else		{		c2l(in,tin0);		c2l(in,tin1);		}	    tin0^=tout0;	    tin1^=tout1;	    tin[0]=tin0;	    tin[1]=tin1;	    DES_encrypt1(tin,ks1,1);	    tin[0]^=m0;	    tin[1]^=m1;	    DES_encrypt1(tin,ks2,0);	    tin[0]^=m0;	    tin[1]^=m1;	    DES_encrypt1(tin,ks1,1);	    tout0=tin[0];	    tout1=tin[1];	    l2c(tout0,out);	    l2c(tout1,out);	    }	iv1=&(*ivec1)[0];	l2c(m0,iv1);	l2c(m1,iv1);	iv2=&(*ivec2)[0];	l2c(tout0,iv2);	l2c(tout1,iv2);	}    else	{	register DES_LONG t0,t1;	c2l(iv1,m0);	c2l(iv1,m1);	c2l(iv2,xor0);	c2l(iv2,xor1);	for (l-=8; l>=-7; l-=8)	    {	    tin[0]=m0;	    tin[1]=m1;	    DES_encrypt1(tin,ks3,1);	    m0=tin[0];	    m1=tin[1];	    c2l(in,tin0);	    c2l(in,tin1);	    t0=tin0;	    t1=tin1;	    tin[0]=tin0;	    tin[1]=tin1;	    DES_encrypt1(tin,ks1,0);	    tin[0]^=m0;	    tin[1]^=m1;	    DES_encrypt1(tin,ks2,1);	    tin[0]^=m0;	    tin[1]^=m1;	    DES_encrypt1(tin,ks1,0);	    tout0=tin[0];	    tout1=tin[1];	    tout0^=xor0;	    tout1^=xor1;	    if(l < 0)		{		l2cn(tout0,tout1,out,l+8);		}	    else		{		l2c(tout0,out);		l2c(tout1,out);		}	    xor0=t0;	    xor1=t1;	    }	iv1=&(*ivec1)[0];	l2c(m0,iv1);	l2c(m1,iv1);	iv2=&(*ivec2)[0];	l2c(xor0,iv2);	l2c(xor1,iv2);	}    tin0=tin1=tout0=tout1=xor0=xor1=0;    tin[0]=tin[1]=0;    }#endif