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/*
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* This is D3DES (V5.09) by Richard Outerbridge with the double and
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* triple-length support removed for use in VNC. Also the bytebit[] array
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* has been reversed so that the most significant bit in each byte of the
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* key is ignored, not the least significant.
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*
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* These changes are:
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* Copyright (C) 1999 AT&T Laboratories Cambridge. All Rights Reserved.
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*
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* This software is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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*/
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/* D3DES (V5.09) -
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*
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* A portable, public domain, version of the Data Encryption Standard.
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*
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* Written with Symantec's THINK (Lightspeed) C by Richard Outerbridge.
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* Thanks to: Dan Hoey for his excellent Initial and Inverse permutation
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* code; Jim Gillogly & Phil Karn for the DES key schedule code; Dennis
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* Ferguson, Eric Young and Dana How for comparing notes; and Ray Lau,
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* for humouring me on.
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*
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* Copyright (c) 1988,1989,1990,1991,1992 by Richard Outerbridge.
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* (GEnie : OUTER; CIS : [71755,204]) Graven Imagery, 1992.
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*/
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#include "d3des.h" |
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|
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static void scrunch(unsigned char *, unsigned long *); |
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static void unscrun(unsigned long *, unsigned char *); |
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static void desfunc(unsigned long *, unsigned long *); |
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static void cookey(unsigned long *); |
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|
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static unsigned long KnL[32] = { 0L }; |
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|
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static const unsigned short bytebit[8] = { |
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01, 02, 04, 010, 020, 040, 0100, 0200 }; |
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|
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static const unsigned long bigbyte[24] = { |
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0x800000L, 0x400000L, 0x200000L, 0x100000L, |
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0x80000L, 0x40000L, 0x20000L, 0x10000L, |
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0x8000L, 0x4000L, 0x2000L, 0x1000L, |
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0x800L, 0x400L, 0x200L, 0x100L, |
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0x80L, 0x40L, 0x20L, 0x10L, |
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0x8L, 0x4L, 0x2L, 0x1L }; |
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|
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/* Use the key schedule specified in the Standard (ANSI X3.92-1981). */
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static const unsigned char pc1[56] = { |
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56, 48, 40, 32, 24, 16, 8, 0, 57, 49, 41, 33, 25, 17, |
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9, 1, 58, 50, 42, 34, 26, 18, 10, 2, 59, 51, 43, 35, |
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62, 54, 46, 38, 30, 22, 14, 6, 61, 53, 45, 37, 29, 21, |
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13, 5, 60, 52, 44, 36, 28, 20, 12, 4, 27, 19, 11, 3 }; |
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|
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static const unsigned char totrot[16] = { |
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1,2,4,6,8,10,12,14,15,17,19,21,23,25,27,28 }; |
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|
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static const unsigned char pc2[48] = { |
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13, 16, 10, 23, 0, 4, 2, 27, 14, 5, 20, 9, |
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22, 18, 11, 3, 25, 7, 15, 6, 26, 19, 12, 1, |
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40, 51, 30, 36, 46, 54, 29, 39, 50, 44, 32, 47, |
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43, 48, 38, 55, 33, 52, 45, 41, 49, 35, 28, 31 }; |
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|
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/* Thanks to James Gillogly & Phil Karn! */
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void deskey(unsigned char *key, int edf) |
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{
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register int i, j, l, m, n; |
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unsigned char pc1m[56], pcr[56]; |
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unsigned long kn[32]; |
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for ( j = 0; j < 56; j++ ) { |
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l = pc1[j]; |
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m = l & 07;
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pc1m[j] = (key[l >> 3] & bytebit[m]) ? 1 : 0; |
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} |
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for( i = 0; i < 16; i++ ) { |
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if( edf == DE1 ) m = (15 - i) << 1; |
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else m = i << 1; |
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n = m + 1;
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kn[m] = kn[n] = 0L;
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for( j = 0; j < 28; j++ ) { |
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l = j + totrot[i]; |
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if( l < 28 ) pcr[j] = pc1m[l]; |
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else pcr[j] = pc1m[l - 28]; |
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} |
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for( j = 28; j < 56; j++ ) { |
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l = j + totrot[i]; |
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if( l < 56 ) pcr[j] = pc1m[l]; |
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else pcr[j] = pc1m[l - 28]; |
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} |
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for( j = 0; j < 24; j++ ) { |
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if( pcr[pc2[j]] ) kn[m] |= bigbyte[j];
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if( pcr[pc2[j+24]] ) kn[n] |= bigbyte[j]; |
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} |
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} |
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cookey(kn); |
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return;
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} |
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static void cookey(register unsigned long *raw1) |
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{
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register unsigned long *cook, *raw0; |
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unsigned long dough[32]; |
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register int i; |
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cook = dough; |
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for( i = 0; i < 16; i++, raw1++ ) { |
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raw0 = raw1++; |
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*cook = (*raw0 & 0x00fc0000L) << 6; |
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*cook |= (*raw0 & 0x00000fc0L) << 10; |
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*cook |= (*raw1 & 0x00fc0000L) >> 10; |
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*cook++ |= (*raw1 & 0x00000fc0L) >> 6; |
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*cook = (*raw0 & 0x0003f000L) << 12; |
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*cook |= (*raw0 & 0x0000003fL) << 16; |
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*cook |= (*raw1 & 0x0003f000L) >> 4; |
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*cook++ |= (*raw1 & 0x0000003fL);
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} |
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usekey(dough); |
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return;
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} |
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void cpkey(register unsigned long *into) |
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{
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register unsigned long *from, *endp; |
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from = KnL, endp = &KnL[32];
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while( from < endp ) *into++ = *from++;
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return;
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} |
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void usekey(register unsigned long *from) |
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{
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register unsigned long *to, *endp; |
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to = KnL, endp = &KnL[32];
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while( to < endp ) *to++ = *from++;
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return;
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} |
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void des(unsigned char *inblock, unsigned char *outblock) |
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{
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unsigned long work[2]; |
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scrunch(inblock, work); |
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desfunc(work, KnL); |
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unscrun(work, outblock); |
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return;
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} |
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static void scrunch(register unsigned char *outof, register unsigned long *into) |
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{
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*into = (*outof++ & 0xffL) << 24; |
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*into |= (*outof++ & 0xffL) << 16; |
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*into |= (*outof++ & 0xffL) << 8; |
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*into++ |= (*outof++ & 0xffL);
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*into = (*outof++ & 0xffL) << 24; |
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*into |= (*outof++ & 0xffL) << 16; |
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*into |= (*outof++ & 0xffL) << 8; |
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*into |= (*outof & 0xffL);
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return;
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} |
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static void unscrun(register unsigned long *outof, register unsigned char *into) |
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{
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*into++ = (unsigned char)((*outof >> 24) & 0xffL); |
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*into++ = (unsigned char)((*outof >> 16) & 0xffL); |
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*into++ = (unsigned char)((*outof >> 8) & 0xffL); |
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*into++ = (unsigned char)(*outof++ & 0xffL); |
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*into++ = (unsigned char)((*outof >> 24) & 0xffL); |
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*into++ = (unsigned char)((*outof >> 16) & 0xffL); |
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*into++ = (unsigned char)((*outof >> 8) & 0xffL); |
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*into = (unsigned char)(*outof & 0xffL); |
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return;
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} |
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static const unsigned long SP1[64] = { |
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0x01010400L, 0x00000000L, 0x00010000L, 0x01010404L, |
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0x01010004L, 0x00010404L, 0x00000004L, 0x00010000L, |
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0x00000400L, 0x01010400L, 0x01010404L, 0x00000400L, |
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0x01000404L, 0x01010004L, 0x01000000L, 0x00000004L, |
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0x00000404L, 0x01000400L, 0x01000400L, 0x00010400L, |
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0x00010400L, 0x01010000L, 0x01010000L, 0x01000404L, |
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0x00010004L, 0x01000004L, 0x01000004L, 0x00010004L, |
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0x00000000L, 0x00000404L, 0x00010404L, 0x01000000L, |
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0x00010000L, 0x01010404L, 0x00000004L, 0x01010000L, |
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0x01010400L, 0x01000000L, 0x01000000L, 0x00000400L, |
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0x01010004L, 0x00010000L, 0x00010400L, 0x01000004L, |
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0x00000400L, 0x00000004L, 0x01000404L, 0x00010404L, |
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0x01010404L, 0x00010004L, 0x01010000L, 0x01000404L, |
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0x01000004L, 0x00000404L, 0x00010404L, 0x01010400L, |
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0x00000404L, 0x01000400L, 0x01000400L, 0x00000000L, |
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0x00010004L, 0x00010400L, 0x00000000L, 0x01010004L }; |
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|
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static const unsigned long SP2[64] = { |
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0x80108020L, 0x80008000L, 0x00008000L, 0x00108020L, |
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0x00100000L, 0x00000020L, 0x80100020L, 0x80008020L, |
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0x80000020L, 0x80108020L, 0x80108000L, 0x80000000L, |
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0x80008000L, 0x00100000L, 0x00000020L, 0x80100020L, |
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0x00108000L, 0x00100020L, 0x80008020L, 0x00000000L, |
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0x80000000L, 0x00008000L, 0x00108020L, 0x80100000L, |
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0x00100020L, 0x80000020L, 0x00000000L, 0x00108000L, |
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0x00008020L, 0x80108000L, 0x80100000L, 0x00008020L, |
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0x00000000L, 0x00108020L, 0x80100020L, 0x00100000L, |
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0x80008020L, 0x80100000L, 0x80108000L, 0x00008000L, |
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0x80100000L, 0x80008000L, 0x00000020L, 0x80108020L, |
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0x00108020L, 0x00000020L, 0x00008000L, 0x80000000L, |
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0x00008020L, 0x80108000L, 0x00100000L, 0x80000020L, |
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0x00100020L, 0x80008020L, 0x80000020L, 0x00100020L, |
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0x00108000L, 0x00000000L, 0x80008000L, 0x00008020L, |
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0x80000000L, 0x80100020L, 0x80108020L, 0x00108000L }; |
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|
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static const unsigned long SP3[64] = { |
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0x00000208L, 0x08020200L, 0x00000000L, 0x08020008L, |
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0x08000200L, 0x00000000L, 0x00020208L, 0x08000200L, |
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0x00020008L, 0x08000008L, 0x08000008L, 0x00020000L, |
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0x08020208L, 0x00020008L, 0x08020000L, 0x00000208L, |
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0x08000000L, 0x00000008L, 0x08020200L, 0x00000200L, |
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0x00020200L, 0x08020000L, 0x08020008L, 0x00020208L, |
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0x08000208L, 0x00020200L, 0x00020000L, 0x08000208L, |
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0x00000008L, 0x08020208L, 0x00000200L, 0x08000000L, |
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0x08020200L, 0x08000000L, 0x00020008L, 0x00000208L, |
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0x00020000L, 0x08020200L, 0x08000200L, 0x00000000L, |
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0x00000200L, 0x00020008L, 0x08020208L, 0x08000200L, |
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0x08000008L, 0x00000200L, 0x00000000L, 0x08020008L, |
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0x08000208L, 0x00020000L, 0x08000000L, 0x08020208L, |
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0x00000008L, 0x00020208L, 0x00020200L, 0x08000008L, |
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0x08020000L, 0x08000208L, 0x00000208L, 0x08020000L, |
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0x00020208L, 0x00000008L, 0x08020008L, 0x00020200L }; |
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|
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static const unsigned long SP4[64] = { |
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0x00802001L, 0x00002081L, 0x00002081L, 0x00000080L, |
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0x00802080L, 0x00800081L, 0x00800001L, 0x00002001L, |
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0x00000000L, 0x00802000L, 0x00802000L, 0x00802081L, |
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0x00000081L, 0x00000000L, 0x00800080L, 0x00800001L, |
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0x00000001L, 0x00002000L, 0x00800000L, 0x00802001L, |
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0x00000080L, 0x00800000L, 0x00002001L, 0x00002080L, |
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0x00800081L, 0x00000001L, 0x00002080L, 0x00800080L, |
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0x00002000L, 0x00802080L, 0x00802081L, 0x00000081L, |
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0x00800080L, 0x00800001L, 0x00802000L, 0x00802081L, |
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0x00000081L, 0x00000000L, 0x00000000L, 0x00802000L, |
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0x00002080L, 0x00800080L, 0x00800081L, 0x00000001L, |
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0x00802001L, 0x00002081L, 0x00002081L, 0x00000080L, |
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0x00802081L, 0x00000081L, 0x00000001L, 0x00002000L, |
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0x00800001L, 0x00002001L, 0x00802080L, 0x00800081L, |
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0x00002001L, 0x00002080L, 0x00800000L, 0x00802001L, |
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0x00000080L, 0x00800000L, 0x00002000L, 0x00802080L }; |
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|
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static const unsigned long SP5[64] = { |
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0x00000100L, 0x02080100L, 0x02080000L, 0x42000100L, |
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0x00080000L, 0x00000100L, 0x40000000L, 0x02080000L, |
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0x40080100L, 0x00080000L, 0x02000100L, 0x40080100L, |
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0x42000100L, 0x42080000L, 0x00080100L, 0x40000000L, |
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0x02000000L, 0x40080000L, 0x40080000L, 0x00000000L, |
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0x40000100L, 0x42080100L, 0x42080100L, 0x02000100L, |
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0x42080000L, 0x40000100L, 0x00000000L, 0x42000000L, |
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0x02080100L, 0x02000000L, 0x42000000L, 0x00080100L, |
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0x00080000L, 0x42000100L, 0x00000100L, 0x02000000L, |
| 260 |
0x40000000L, 0x02080000L, 0x42000100L, 0x40080100L, |
| 261 |
0x02000100L, 0x40000000L, 0x42080000L, 0x02080100L, |
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0x40080100L, 0x00000100L, 0x02000000L, 0x42080000L, |
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0x42080100L, 0x00080100L, 0x42000000L, 0x42080100L, |
| 264 |
0x02080000L, 0x00000000L, 0x40080000L, 0x42000000L, |
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0x00080100L, 0x02000100L, 0x40000100L, 0x00080000L, |
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0x00000000L, 0x40080000L, 0x02080100L, 0x40000100L }; |
| 267 |
|
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static const unsigned long SP6[64] = { |
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0x20000010L, 0x20400000L, 0x00004000L, 0x20404010L, |
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0x20400000L, 0x00000010L, 0x20404010L, 0x00400000L, |
| 271 |
0x20004000L, 0x00404010L, 0x00400000L, 0x20000010L, |
| 272 |
0x00400010L, 0x20004000L, 0x20000000L, 0x00004010L, |
| 273 |
0x00000000L, 0x00400010L, 0x20004010L, 0x00004000L, |
| 274 |
0x00404000L, 0x20004010L, 0x00000010L, 0x20400010L, |
| 275 |
0x20400010L, 0x00000000L, 0x00404010L, 0x20404000L, |
| 276 |
0x00004010L, 0x00404000L, 0x20404000L, 0x20000000L, |
| 277 |
0x20004000L, 0x00000010L, 0x20400010L, 0x00404000L, |
| 278 |
0x20404010L, 0x00400000L, 0x00004010L, 0x20000010L, |
| 279 |
0x00400000L, 0x20004000L, 0x20000000L, 0x00004010L, |
| 280 |
0x20000010L, 0x20404010L, 0x00404000L, 0x20400000L, |
| 281 |
0x00404010L, 0x20404000L, 0x00000000L, 0x20400010L, |
| 282 |
0x00000010L, 0x00004000L, 0x20400000L, 0x00404010L, |
| 283 |
0x00004000L, 0x00400010L, 0x20004010L, 0x00000000L, |
| 284 |
0x20404000L, 0x20000000L, 0x00400010L, 0x20004010L }; |
| 285 |
|
| 286 |
static const unsigned long SP7[64] = { |
| 287 |
0x00200000L, 0x04200002L, 0x04000802L, 0x00000000L, |
| 288 |
0x00000800L, 0x04000802L, 0x00200802L, 0x04200800L, |
| 289 |
0x04200802L, 0x00200000L, 0x00000000L, 0x04000002L, |
| 290 |
0x00000002L, 0x04000000L, 0x04200002L, 0x00000802L, |
| 291 |
0x04000800L, 0x00200802L, 0x00200002L, 0x04000800L, |
| 292 |
0x04000002L, 0x04200000L, 0x04200800L, 0x00200002L, |
| 293 |
0x04200000L, 0x00000800L, 0x00000802L, 0x04200802L, |
| 294 |
0x00200800L, 0x00000002L, 0x04000000L, 0x00200800L, |
| 295 |
0x04000000L, 0x00200800L, 0x00200000L, 0x04000802L, |
| 296 |
0x04000802L, 0x04200002L, 0x04200002L, 0x00000002L, |
| 297 |
0x00200002L, 0x04000000L, 0x04000800L, 0x00200000L, |
| 298 |
0x04200800L, 0x00000802L, 0x00200802L, 0x04200800L, |
| 299 |
0x00000802L, 0x04000002L, 0x04200802L, 0x04200000L, |
| 300 |
0x00200800L, 0x00000000L, 0x00000002L, 0x04200802L, |
| 301 |
0x00000000L, 0x00200802L, 0x04200000L, 0x00000800L, |
| 302 |
0x04000002L, 0x04000800L, 0x00000800L, 0x00200002L }; |
| 303 |
|
| 304 |
static const unsigned long SP8[64] = { |
| 305 |
0x10001040L, 0x00001000L, 0x00040000L, 0x10041040L, |
| 306 |
0x10000000L, 0x10001040L, 0x00000040L, 0x10000000L, |
| 307 |
0x00040040L, 0x10040000L, 0x10041040L, 0x00041000L, |
| 308 |
0x10041000L, 0x00041040L, 0x00001000L, 0x00000040L, |
| 309 |
0x10040000L, 0x10000040L, 0x10001000L, 0x00001040L, |
| 310 |
0x00041000L, 0x00040040L, 0x10040040L, 0x10041000L, |
| 311 |
0x00001040L, 0x00000000L, 0x00000000L, 0x10040040L, |
| 312 |
0x10000040L, 0x10001000L, 0x00041040L, 0x00040000L, |
| 313 |
0x00041040L, 0x00040000L, 0x10041000L, 0x00001000L, |
| 314 |
0x00000040L, 0x10040040L, 0x00001000L, 0x00041040L, |
| 315 |
0x10001000L, 0x00000040L, 0x10000040L, 0x10040000L, |
| 316 |
0x10040040L, 0x10000000L, 0x00040000L, 0x10001040L, |
| 317 |
0x00000000L, 0x10041040L, 0x00040040L, 0x10000040L, |
| 318 |
0x10040000L, 0x10001000L, 0x10001040L, 0x00000000L, |
| 319 |
0x10041040L, 0x00041000L, 0x00041000L, 0x00001040L, |
| 320 |
0x00001040L, 0x00040040L, 0x10000000L, 0x10041000L }; |
| 321 |
|
| 322 |
static void desfunc(register unsigned long *block, register unsigned long *keys) |
| 323 |
{
|
| 324 |
register unsigned long fval, work, right, leftt; |
| 325 |
register int round; |
| 326 |
|
| 327 |
leftt = block[0];
|
| 328 |
right = block[1];
|
| 329 |
work = ((leftt >> 4) ^ right) & 0x0f0f0f0fL; |
| 330 |
right ^= work; |
| 331 |
leftt ^= (work << 4);
|
| 332 |
work = ((leftt >> 16) ^ right) & 0x0000ffffL; |
| 333 |
right ^= work; |
| 334 |
leftt ^= (work << 16);
|
| 335 |
work = ((right >> 2) ^ leftt) & 0x33333333L; |
| 336 |
leftt ^= work; |
| 337 |
right ^= (work << 2);
|
| 338 |
work = ((right >> 8) ^ leftt) & 0x00ff00ffL; |
| 339 |
leftt ^= work; |
| 340 |
right ^= (work << 8);
|
| 341 |
right = ((right << 1) | ((right >> 31) & 1L)) & 0xffffffffL; |
| 342 |
work = (leftt ^ right) & 0xaaaaaaaaL;
|
| 343 |
leftt ^= work; |
| 344 |
right ^= work; |
| 345 |
leftt = ((leftt << 1) | ((leftt >> 31) & 1L)) & 0xffffffffL; |
| 346 |
|
| 347 |
for( round = 0; round < 8; round++ ) { |
| 348 |
work = (right << 28) | (right >> 4); |
| 349 |
work ^= *keys++; |
| 350 |
fval = SP7[ work & 0x3fL];
|
| 351 |
fval |= SP5[(work >> 8) & 0x3fL]; |
| 352 |
fval |= SP3[(work >> 16) & 0x3fL]; |
| 353 |
fval |= SP1[(work >> 24) & 0x3fL]; |
| 354 |
work = right ^ *keys++; |
| 355 |
fval |= SP8[ work & 0x3fL];
|
| 356 |
fval |= SP6[(work >> 8) & 0x3fL]; |
| 357 |
fval |= SP4[(work >> 16) & 0x3fL]; |
| 358 |
fval |= SP2[(work >> 24) & 0x3fL]; |
| 359 |
leftt ^= fval; |
| 360 |
work = (leftt << 28) | (leftt >> 4); |
| 361 |
work ^= *keys++; |
| 362 |
fval = SP7[ work & 0x3fL];
|
| 363 |
fval |= SP5[(work >> 8) & 0x3fL]; |
| 364 |
fval |= SP3[(work >> 16) & 0x3fL]; |
| 365 |
fval |= SP1[(work >> 24) & 0x3fL]; |
| 366 |
work = leftt ^ *keys++; |
| 367 |
fval |= SP8[ work & 0x3fL];
|
| 368 |
fval |= SP6[(work >> 8) & 0x3fL]; |
| 369 |
fval |= SP4[(work >> 16) & 0x3fL]; |
| 370 |
fval |= SP2[(work >> 24) & 0x3fL]; |
| 371 |
right ^= fval; |
| 372 |
} |
| 373 |
|
| 374 |
right = (right << 31) | (right >> 1); |
| 375 |
work = (leftt ^ right) & 0xaaaaaaaaL;
|
| 376 |
leftt ^= work; |
| 377 |
right ^= work; |
| 378 |
leftt = (leftt << 31) | (leftt >> 1); |
| 379 |
work = ((leftt >> 8) ^ right) & 0x00ff00ffL; |
| 380 |
right ^= work; |
| 381 |
leftt ^= (work << 8);
|
| 382 |
work = ((leftt >> 2) ^ right) & 0x33333333L; |
| 383 |
right ^= work; |
| 384 |
leftt ^= (work << 2);
|
| 385 |
work = ((right >> 16) ^ leftt) & 0x0000ffffL; |
| 386 |
leftt ^= work; |
| 387 |
right ^= (work << 16);
|
| 388 |
work = ((right >> 4) ^ leftt) & 0x0f0f0f0fL; |
| 389 |
leftt ^= work; |
| 390 |
right ^= (work << 4);
|
| 391 |
*block++ = right; |
| 392 |
*block = leftt; |
| 393 |
return;
|
| 394 |
} |
| 395 |
|
| 396 |
/* Validation sets:
|
| 397 |
*
|
| 398 |
* Single-length key, single-length plaintext -
|
| 399 |
* Key : 0123 4567 89ab cdef
|
| 400 |
* Plain : 0123 4567 89ab cde7
|
| 401 |
* Cipher : c957 4425 6a5e d31d
|
| 402 |
*
|
| 403 |
* Double-length key, single-length plaintext -
|
| 404 |
* Key : 0123 4567 89ab cdef fedc ba98 7654 3210
|
| 405 |
* Plain : 0123 4567 89ab cde7
|
| 406 |
* Cipher : 7f1d 0a77 826b 8aff
|
| 407 |
*
|
| 408 |
* Double-length key, double-length plaintext -
|
| 409 |
* Key : 0123 4567 89ab cdef fedc ba98 7654 3210
|
| 410 |
* Plain : 0123 4567 89ab cdef 0123 4567 89ab cdff
|
| 411 |
* Cipher : 27a0 8440 406a df60 278f 47cf 42d6 15d7
|
| 412 |
*
|
| 413 |
* Triple-length key, single-length plaintext -
|
| 414 |
* Key : 0123 4567 89ab cdef fedc ba98 7654 3210 89ab cdef 0123 4567
|
| 415 |
* Plain : 0123 4567 89ab cde7
|
| 416 |
* Cipher : de0b 7c06 ae5e 0ed5
|
| 417 |
*
|
| 418 |
* Triple-length key, double-length plaintext -
|
| 419 |
* Key : 0123 4567 89ab cdef fedc ba98 7654 3210 89ab cdef 0123 4567
|
| 420 |
* Plain : 0123 4567 89ab cdef 0123 4567 89ab cdff
|
| 421 |
* Cipher : ad0d 1b30 ac17 cf07 0ed1 1c63 81e4 4de5
|
| 422 |
*
|
| 423 |
* d3des V5.0a rwo 9208.07 18:44 Graven Imagery
|
| 424 |
**********************************************************************/
|