/* * This is D3DES (V5.09) by Richard Outerbridge with the double and * triple-length support removed for use in VNC.  Also the bytebit[] array * has been reversed so that the most significant bit in each byte of the * key is ignored, not the least significant. * * These changes are: *  Copyright (C) 1999 AT&T Laboratories Cambridge.  All Rights Reserved. * * This software is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. *//* D3DES (V5.09) - * * A portable, public domain, version of the Data Encryption Standard. * * Written with Symantec's THINK (Lightspeed) C by Richard Outerbridge. * Thanks to: Dan Hoey for his excellent Initial and Inverse permutation * code;  Jim Gillogly & Phil Karn for the DES key schedule code; Dennis * Ferguson, Eric Young and Dana How for comparing notes; and Ray Lau, * for humouring me on. * * Copyright (c) 1988,1989,1990,1991,1992 by Richard Outerbridge. * (GEnie : OUTER; CIS : [71755,204]) Graven Imagery, 1992. */#include "d3des.h"static void scrunch(unsigned char *, unsigned long *);static void unscrun(unsigned long *, unsigned char *);static void desfunc(unsigned long *, unsigned long *);static void cookey(unsigned long *);static unsigned long KnL[32] = { 0L };static unsigned short bytebit[8]	= {	01, 02, 04, 010, 020, 040, 0100, 0200 };static unsigned long bigbyte[24] = {	0x800000L,	0x400000L,	0x200000L,	0x100000L,	0x80000L,	0x40000L,	0x20000L,	0x10000L,	0x8000L,	0x4000L,	0x2000L,	0x1000L,	0x800L, 	0x400L, 	0x200L, 	0x100L,	0x80L,		0x40L,		0x20L,		0x10L,	0x8L,		0x4L,		0x2L,		0x1L	};/* Use the key schedule specified in the Standard (ANSI X3.92-1981). */static unsigned char pc1[56] = {	56, 48, 40, 32, 24, 16,  8,	 0, 57, 49, 41, 33, 25, 17,	 9,  1, 58, 50, 42, 34, 26,	18, 10,  2, 59, 51, 43, 35,	62, 54, 46, 38, 30, 22, 14,	 6, 61, 53, 45, 37, 29, 21,	13,  5, 60, 52, 44, 36, 28,	20, 12,  4, 27, 19, 11,  3 };static unsigned char totrot[16] = {	1,2,4,6,8,10,12,14,15,17,19,21,23,25,27,28 };static unsigned char pc2[48] = {	13, 16, 10, 23,  0,  4,  2, 27, 14,  5, 20,  9,	22, 18, 11,  3, 25,  7, 15,  6, 26, 19, 12,  1,	40, 51, 30, 36, 46, 54, 29, 39, 50, 44, 32, 47,	43, 48, 38, 55, 33, 52, 45, 41, 49, 35, 28, 31 };void deskey(key, edf)	/* Thanks to James Gillogly & Phil Karn! */unsigned char *key;int edf;{	register int i, j, l, m, n;	unsigned char pc1m[56], pcr[56];	unsigned long kn[32];	for ( j = 0; j < 56; j++ ) {		l = pc1[j];		m = l & 07;		pc1m[j] = (key[l >> 3] & bytebit[m]) ? 1 : 0;		}	for( i = 0; i < 16; i++ ) {		if( edf == DE1 ) m = (15 - i) << 1;		else m = i << 1;		n = m + 1;		kn[m] = kn[n] = 0L;		for( j = 0; j < 28; j++ ) {			l = j + totrot[i];			if( l < 28 ) pcr[j] = pc1m[l];			else pcr[j] = pc1m[l - 28];			}		for( j = 28; j < 56; j++ ) {		    l = j + totrot[i];		    if( l < 56 ) pcr[j] = pc1m[l];		    else pcr[j] = pc1m[l - 28];		    }		for( j = 0; j < 24; j++ ) {			if( pcr[pc2[j]] ) kn[m] |= bigbyte[j];			if( pcr[pc2[j+24]] ) kn[n] |= bigbyte[j];			}		}	cookey(kn);	return;	}static void cookey(raw1)register unsigned long *raw1;{	register unsigned long *cook, *raw0;	unsigned long dough[32];	register int i;	cook = dough;	for( i = 0; i < 16; i++, raw1++ ) {		raw0 = raw1++;		*cook	 = (*raw0 & 0x00fc0000L) << 6;		*cook	|= (*raw0 & 0x00000fc0L) << 10;		*cook	|= (*raw1 & 0x00fc0000L) >> 10;		*cook++ |= (*raw1 & 0x00000fc0L) >> 6;		*cook	 = (*raw0 & 0x0003f000L) << 12;		*cook	|= (*raw0 & 0x0000003fL) << 16;		*cook	|= (*raw1 & 0x0003f000L) >> 4;		*cook++ |= (*raw1 & 0x0000003fL);		}	usekey(dough);	return;	}void cpkey(into)register unsigned long *into;{	register unsigned long *from, *endp;	from = KnL, endp = &KnL[32];	while( from < endp ) *into++ = *from++;	return;	}void usekey(from)register unsigned long *from;{	register unsigned long *to, *endp;	to = KnL, endp = &KnL[32];	while( to < endp ) *to++ = *from++;	return;	}void des(inblock, outblock)unsigned char *inblock, *outblock;{	unsigned long work[2];	scrunch(inblock, work);	desfunc(work, KnL);	unscrun(work, outblock);	return;	}static void scrunch(outof, into)register unsigned char *outof;register unsigned long *into;{	*into	 = (*outof++ & 0xffL) << 24;	*into	|= (*outof++ & 0xffL) << 16;	*into	|= (*outof++ & 0xffL) << 8;	*into++ |= (*outof++ & 0xffL);	*into	 = (*outof++ & 0xffL) << 24;	*into	|= (*outof++ & 0xffL) << 16;	*into	|= (*outof++ & 0xffL) << 8;	*into	|= (*outof   & 0xffL);	return;	}static void unscrun(outof, into)register unsigned long *outof;register unsigned char *into;{	*into++ = (unsigned char)((*outof >> 24) & 0xffL);	*into++ = (unsigned char)((*outof >> 16) & 0xffL);	*into++ = (unsigned char)((*outof >>  8) & 0xffL);	*into++ = (unsigned char)(*outof++	 & 0xffL);	*into++ = (unsigned char)((*outof >> 24) & 0xffL);	*into++ = (unsigned char)((*outof >> 16) & 0xffL);	*into++ = (unsigned char)((*outof >>  8) & 0xffL);	*into	=  (unsigned char)(*outof	 & 0xffL);	return;	}static unsigned long SP1[64] = {	0x01010400L, 0x00000000L, 0x00010000L, 0x01010404L,	0x01010004L, 0x00010404L, 0x00000004L, 0x00010000L,	0x00000400L, 0x01010400L, 0x01010404L, 0x00000400L,	0x01000404L, 0x01010004L, 0x01000000L, 0x00000004L,	0x00000404L, 0x01000400L, 0x01000400L, 0x00010400L,	0x00010400L, 0x01010000L, 0x01010000L, 0x01000404L,	0x00010004L, 0x01000004L, 0x01000004L, 0x00010004L,	0x00000000L, 0x00000404L, 0x00010404L, 0x01000000L,	0x00010000L, 0x01010404L, 0x00000004L, 0x01010000L,	0x01010400L, 0x01000000L, 0x01000000L, 0x00000400L,	0x01010004L, 0x00010000L, 0x00010400L, 0x01000004L,	0x00000400L, 0x00000004L, 0x01000404L, 0x00010404L,	0x01010404L, 0x00010004L, 0x01010000L, 0x01000404L,	0x01000004L, 0x00000404L, 0x00010404L, 0x01010400L,	0x00000404L, 0x01000400L, 0x01000400L, 0x00000000L,	0x00010004L, 0x00010400L, 0x00000000L, 0x01010004L };static unsigned long SP2[64] = {	0x80108020L, 0x80008000L, 0x00008000L, 0x00108020L,	0x00100000L, 0x00000020L, 0x80100020L, 0x80008020L,	0x80000020L, 0x80108020L, 0x80108000L, 0x80000000L,	0x80008000L, 0x00100000L, 0x00000020L, 0x80100020L,	0x00108000L, 0x00100020L, 0x80008020L, 0x00000000L,	0x80000000L, 0x00008000L, 0x00108020L, 0x80100000L,	0x00100020L, 0x80000020L, 0x00000000L, 0x00108000L,	0x00008020L, 0x80108000L, 0x80100000L, 0x00008020L,	0x00000000L, 0x00108020L, 0x80100020L, 0x00100000L,	0x80008020L, 0x80100000L, 0x80108000L, 0x00008000L,	0x80100000L, 0x80008000L, 0x00000020L, 0x80108020L,	0x00108020L, 0x00000020L, 0x00008000L, 0x80000000L,	0x00008020L, 0x80108000L, 0x00100000L, 0x80000020L,