/* crypto/des/fcrypt_b.c *//* 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 *    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 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 <stdio.h>/* This version of crypt has been developed from my MIT compatible * DES library. * The library is available at pub/Crypto/DES at ftp.psy.uq.oz.au * Eric Young (eay@cryptsoft.com) */#define DES_FCRYPT#include "des_locl.h"#undef DES_FCRYPT#undef PERM_OP#define PERM_OP(a,b,t,n,m) ((t)=((((a)>>(n))^(b))&(m)),\	(b)^=(t),\	(a)^=((t)<<(n)))#undef HPERM_OP#define HPERM_OP(a,t,n,m) ((t)=((((a)<<(16-(n)))^(a))&(m)),\	(a)=(a)^(t)^(t>>(16-(n))))\void fcrypt_body(DES_LONG *out, DES_key_schedule *ks, DES_LONG Eswap0,		 DES_LONG Eswap1)	{	register DES_LONG l,r,t,u;#ifdef DES_PTR	register const unsigned char *des_SP=(const unsigned char *)DES_SPtrans;#endif	register DES_LONG *s;	register int j;	register DES_LONG E0,E1;	l=0;	r=0;	s=(DES_LONG *)ks;	E0=Eswap0;	E1=Eswap1;	for (j=0; j<25; j++)		{#ifndef DES_UNROLL		register int i;		for (i=0; i<32; i+=8)			{			D_ENCRYPT(l,r,i+0); /*  1 */			D_ENCRYPT(r,l,i+2); /*  2 */			D_ENCRYPT(l,r,i+4); /*  1 */			D_ENCRYPT(r,l,i+6); /*  2 */			}#else		D_ENCRYPT(l,r, 0); /*  1 */		D_ENCRYPT(r,l, 2); /*  2 */		D_ENCRYPT(l,r, 4); /*  3 */		D_ENCRYPT(r,l, 6); /*  4 */		D_ENCRYPT(l,r, 8); /*  5 */		D_ENCRYPT(r,l,10); /*  6 */		D_ENCRYPT(l,r,12); /*  7 */		D_ENCRYPT(r,l,14); /*  8 */		D_ENCRYPT(l,r,16); /*  9 */		D_ENCRYPT(r,l,18); /*  10 */		D_ENCRYPT(l,r,20); /*  11 */		D_ENCRYPT(r,l,22); /*  12 */		D_ENCRYPT(l,r,24); /*  13 */		D_ENCRYPT(r,l,26); /*  14 */		D_ENCRYPT(l,r,28); /*  15 */		D_ENCRYPT(r,l,30); /*  16 */#endif		t=l;		l=r;		r=t;		}	l=ROTATE(l,3)&0xffffffffL;	r=ROTATE(r,3)&0xffffffffL;	PERM_OP(l,r,t, 1,0x55555555L);	PERM_OP(r,l,t, 8,0x00ff00ffL);	PERM_OP(l,r,t, 2,0x33333333L);	PERM_OP(r,l,t,16,0x0000ffffL);	PERM_OP(l,r,t, 4,0x0f0f0f0fL);	out[0]=r;	out[1]=l;	}