/* 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.** THIS SOFTWARE PLACED IN THE PUBLIC DOMAIN BY THE AUTHOUR* 920825 19:42 EDST** 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 long KnR[32] = { 0L };static unsigned long Kn3[32] = { 0L };static unsigned char Df_Key[24] = {        0x01,0x23,0x45,0x67,0x89,0xab,0xcd,0xef,        0xfe,0xdc,0xba,0x98,0x76,0x54,0x32,0x10,        0x89,0xab,0xcd,0xef,0x01,0x23,0x45,0x67 };static unsigned short bytebit[8]        = {        0200, 0100, 040, 020, 010, 04, 02, 01 };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;short edf;{        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)unsigned long *raw1;{        unsigned long *cook, *raw0;        unsigned long dough[32];        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)unsigned long *into;{        unsigned long *from, *endp;        from = KnL, endp = &KnL[32];        while( from < endp ) *into++ = *from++;        return;        }void usekey(from)unsigned long *from;{        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)unsigned char *outof;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)unsigned long *outof;unsigned char *into;{        *into++ = (*outof >> 24) & 0xffL;        *into++ = (*outof >> 16) & 0xffL;        *into++ = (*outof >>  8) & 0xffL;        *into++ =  *outof++         & 0xffL;        *into++ = (*outof >> 24) & 0xffL;        *into++ = (*outof >> 16) & 0xffL;        *into++ = (*outof >>  8) & 0xffL;        *into   =  *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,        0x00100020L, 0x80008020L, 0x80000020L, 0x00100020L,        0x00108000L, 0x00000000L, 0x80008000L, 0x00008020L,        0x80000000L, 0x80100020L, 0x80108020L, 0x00108000L };static unsigned long SP3[64] = {        0x00000208L, 0x08020200L, 0x00000000L, 0x08020008L,        0x08000200L, 0x00000000L, 0x00020208L, 0x08000200L,        0x00020008L, 0x08000008L, 0x08000008L, 0x00020000L,        0x08020208L, 0x00020008L, 0x08020000L, 0x00000208L,        0x08000000L, 0x00000008L, 0x08020200L, 0x00000200L,        0x00020200L, 0x08020000L, 0x08020008L, 0x00020208L,        0x08000208L, 0x00020200L, 0x00020000L, 0x08000208L,        0x00000008L, 0x08020208L, 0x00000200L, 0x08000000L,        0x08020200L, 0x08000000L, 0x00020008L, 0x00000208L,        0x00020000L, 0x08020200L, 0x08000200L, 0x00000000L,        0x00000200L, 0x00020008L, 0x08020208L, 0x08000200L,        0x08000008L, 0x00000200L, 0x00000000L, 0x08020008L,        0x08000208L, 0x00020000L, 0x08000000L, 0x08020208L,        0x00000008L, 0x00020208L, 0x00020200L, 0x08000008L,        0x08020000L, 0x08000208L, 0x00000208L, 0x08020000L,        0x00020208L, 0x00000008L, 0x08020008L, 0x00020200L };static unsigned long SP4[64] = {        0x00802001L, 0x00002081L, 0x00002081L, 0x00000080L,        0x00802080L, 0x00800081L, 0x00800001L, 0x00002001L,        0x00000000L, 0x00802000L, 0x00802000L, 0x00802081L,        0x00000081L, 0x00000000L, 0x00800080L, 0x00800001L,        0x00000001L, 0x00002000L, 0x00800000L, 0x00802001L,        0x00000080L, 0x00800000L, 0x00002001L, 0x00002080L,        0x00800081L, 0x00000001L, 0x00002080L, 0x00800080L,        0x00002000L, 0x00802080L, 0x00802081L, 0x00000081L,        0x00800080L, 0x00800001L, 0x00802000L, 0x00802081L,        0x00000081L, 0x00000000L, 0x00000000L, 0x00802000L,        0x00002080L, 0x00800080L, 0x00800081L, 0x00000001L,        0x00802001L, 0x00002081L, 0x00002081L, 0x00000080L,        0x00802081L, 0x00000081L, 0x00000001L, 0x00002000L,        0x00800001L, 0x00002001L, 0x00802080L, 0x00800081L,        0x00002001L, 0x00002080L, 0x00800000L, 0x00802001L,        0x00000080L, 0x00800000L, 0x00002000L, 0x00802080L };static unsigned long SP5[64] = {        0x00000100L, 0x02080100L, 0x02080000L, 0x42000100L,        0x00080000L, 0x00000100L, 0x40000000L, 0x02080000L,        0x40080100L, 0x00080000L, 0x02000100L, 0x40080100L,        0x42000100L, 0x42080000L, 0x00080100L, 0x40000000L,        0x02000000L, 0x40080000L, 0x40080000L, 0x00000000L,        0x40000100L, 0x42080100L, 0x42080100L, 0x02000100L,        0x42080000L, 0x40000100L, 0x00000000L, 0x42000000L,        0x02080100L, 0x02000000L, 0x42000000L, 0x00080100L,        0x00080000L, 0x42000100L, 0x00000100L, 0x02000000L,        0x40000000L, 0x02080000L, 0x42000100L, 0x40080100L,        0x02000100L, 0x40000000L, 0x42080000L, 0x02080100L,        0x40080100L, 0x00000100L, 0x02000000L, 0x42080000L,        0x42080100L, 0x00080100L, 0x42000000L, 0x42080100L,        0x02080000L, 0x00000000L, 0x40080000L, 0x42000000L,        0x00080100L, 0x02000100L, 0x40000100L, 0x00080000L,        0x00000000L, 0x40080000L, 0x02080100L, 0x40000100L };static unsigned long SP6[64] = {        0x20000010L, 0x20400000L, 0x00004000L, 0x20404010L,        0x20400000L, 0x00000010L, 0x20404010L, 0x00400000L,        0x20004000L, 0x00404010L, 0x00400000L, 0x20000010L,        0x00400010L, 0x20004000L, 0x20000000L, 0x00004010L,        0x00000000L, 0x00400010L, 0x20004010L, 0x00004000L,        0x00404000L, 0x20004010L, 0x00000010L, 0x20400010L,        0x20400010L, 0x00000000L, 0x00404010L, 0x20404000L,        0x00004010L, 0x00404000L, 0x20404000L, 0x20000000L,        0x20004000L, 0x00000010L, 0x20400010L, 0x00404000L,        0x20404010L, 0x00400000L, 0x00004010L, 0x20000010L,        0x00400000L, 0x20004000L, 0x20000000L, 0x00004010L,        0x20000010L, 0x20404010L, 0x00404000L, 0x20400000L,        0x00404010L, 0x20404000L, 0x00000000L, 0x20400010L,        0x00000010L, 0x00004000L, 0x20400000L, 0x00404010L,        0x00004000L, 0x00400010L, 0x20004010L, 0x00000000L,        0x20404000L, 0x20000000L, 0x00400010L, 0x20004010L };static unsigned long SP7[64] = {        0x00200000L, 0x04200002L, 0x04000802L, 0x00000000L,        0x00000800L, 0x04000802L, 0x00200802L, 0x04200800L,        0x04200802L, 0x00200000L, 0x00000000L, 0x04000002L,        0x00000002L, 0x04000000L, 0x04200002L, 0x00000802L,        0x04000800L, 0x00200802L, 0x00200002L, 0x04000800L,        0x04000002L, 0x04200000L, 0x04200800L, 0x00200002L,        0x04200000L, 0x00000800L, 0x00000802L, 0x04200802L,        0x00200800L, 0x00000002L, 0x04000000L, 0x00200800L,        0x04000000L, 0x00200800L, 0x00200000L, 0x04000802L,        0x04000802L, 0x04200002L, 0x04200002L, 0x00000002L,        0x00200002L, 0x04000000L, 0x04000800L, 0x00200000L,        0x04200800L, 0x00000802L, 0x00200802L, 0x04200800L,        0x00000802L, 0x04000002L, 0x04200802L, 0x04200000L,        0x00200800L, 0x00000000L, 0x00000002L, 0x04200802L,        0x00000000L, 0x00200802L, 0x04200000L, 0x00000800L,        0x04000002L, 0x04000800L, 0x00000800L, 0x00200002L };static unsigned long SP8[64] = {        0x10001040L, 0x00001000L, 0x00040000L, 0x10041040L,        0x10000000L, 0x10001040L, 0x00000040L, 0x10000000L,        0x00040040L, 0x10040000L, 0x10041040L, 0x00041000L,        0x10041000L, 0x00041040L, 0x00001000L, 0x00000040L,        0x10040000L, 0x10000040L, 0x10001000L, 0x00001040L,        0x00041000L, 0x00040040L, 0x10040040L, 0x10041000L,        0x00001040L, 0x00000000L, 0x00000000L, 0x10040040L,        0x10000040L, 0x10001000L, 0x00041040L, 0x00040000L,        0x00041040L, 0x00040000L, 0x10041000L, 0x00001000L,        0x00000040L, 0x10040040L, 0x00001000L, 0x00041040L,        0x10001000L, 0x00000040L, 0x10000040L, 0x10040000L,        0x10040040L, 0x10000000L, 0x00040000L, 0x10001040L,        0x00000000L, 0x10041040L, 0x00040040L, 0x10000040L,        0x10040000L, 0x10001000L, 0x10001040L, 0x00000000L,        0x10041040L, 0x00041000L, 0x00041000L, 0x00001040L,        0x00001040L, 0x00040040L, 0x10000000L, 0x10041000L };static void desfunc(block, keys)unsigned long *block, *keys;{        unsigned long fval, work, right, leftt;        int round;               leftt = block[0];        right = block[1];        work = ((leftt >> 4) ^ right) & 0x0f0f0f0fL;        right ^= work;        leftt ^= (work << 4);        work = ((leftt >> 16) ^ right) & 0x0000ffffL;        right ^= work;        leftt ^= (work << 16);        work = ((right >> 2) ^ leftt) & 0x33333333L;        leftt ^= work;        right ^= (work << 2);