Annotation of qemu/d3des.c, revision 1.1.1.2

1.1       root        1: /*
                      2:  * This is D3DES (V5.09) by Richard Outerbridge with the double and
                      3:  * triple-length support removed for use in VNC.  Also the bytebit[] array
                      4:  * has been reversed so that the most significant bit in each byte of the
                      5:  * key is ignored, not the least significant.
                      6:  *
                      7:  * These changes are:
                      8:  *  Copyright (C) 1999 AT&T Laboratories Cambridge.  All Rights Reserved.
                      9:  *
                     10:  * This software is distributed in the hope that it will be useful,
                     11:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
                     12:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
                     13:  */
                     14: 
                     15: /* D3DES (V5.09) -
                     16:  *
                     17:  * A portable, public domain, version of the Data Encryption Standard.
                     18:  *
                     19:  * Written with Symantec's THINK (Lightspeed) C by Richard Outerbridge.
                     20:  * Thanks to: Dan Hoey for his excellent Initial and Inverse permutation
                     21:  * code;  Jim Gillogly & Phil Karn for the DES key schedule code; Dennis
                     22:  * Ferguson, Eric Young and Dana How for comparing notes; and Ray Lau,
                     23:  * for humouring me on.
                     24:  *
                     25:  * Copyright (c) 1988,1989,1990,1991,1992 by Richard Outerbridge.
                     26:  * (GEnie : OUTER; CIS : [71755,204]) Graven Imagery, 1992.
                     27:  */
                     28: 
                     29: #include "d3des.h"
                     30: 
                     31: static void scrunch(unsigned char *, unsigned long *);
                     32: static void unscrun(unsigned long *, unsigned char *);
                     33: static void desfunc(unsigned long *, unsigned long *);
                     34: static void cookey(unsigned long *);
                     35: 
                     36: static unsigned long KnL[32] = { 0L };
                     37: 
1.1.1.2 ! root       38: static const unsigned short bytebit[8] = {
1.1       root       39:        01, 02, 04, 010, 020, 040, 0100, 0200 };
                     40: 
1.1.1.2 ! root       41: static const unsigned long bigbyte[24] = {
1.1       root       42:        0x800000L,      0x400000L,      0x200000L,      0x100000L,
                     43:        0x80000L,       0x40000L,       0x20000L,       0x10000L,
                     44:        0x8000L,        0x4000L,        0x2000L,        0x1000L,
                     45:        0x800L,         0x400L,         0x200L,         0x100L,
                     46:        0x80L,          0x40L,          0x20L,          0x10L,
                     47:        0x8L,           0x4L,           0x2L,           0x1L    };
                     48: 
                     49: /* Use the key schedule specified in the Standard (ANSI X3.92-1981). */
                     50: 
1.1.1.2 ! root       51: static const unsigned char pc1[56] = {
1.1       root       52:        56, 48, 40, 32, 24, 16,  8,      0, 57, 49, 41, 33, 25, 17,
                     53:         9,  1, 58, 50, 42, 34, 26,     18, 10,  2, 59, 51, 43, 35,
                     54:        62, 54, 46, 38, 30, 22, 14,      6, 61, 53, 45, 37, 29, 21,
                     55:        13,  5, 60, 52, 44, 36, 28,     20, 12,  4, 27, 19, 11,  3 };
                     56: 
1.1.1.2 ! root       57: static const unsigned char totrot[16] = {
1.1       root       58:        1,2,4,6,8,10,12,14,15,17,19,21,23,25,27,28 };
                     59: 
1.1.1.2 ! root       60: static const unsigned char pc2[48] = {
1.1       root       61:        13, 16, 10, 23,  0,  4,  2, 27, 14,  5, 20,  9,
                     62:        22, 18, 11,  3, 25,  7, 15,  6, 26, 19, 12,  1,
                     63:        40, 51, 30, 36, 46, 54, 29, 39, 50, 44, 32, 47,
                     64:        43, 48, 38, 55, 33, 52, 45, 41, 49, 35, 28, 31 };
                     65: 
1.1.1.2 ! root       66: /* Thanks to James Gillogly & Phil Karn! */
        !            67: void deskey(unsigned char *key, int edf)
1.1       root       68: {
                     69:        register int i, j, l, m, n;
                     70:        unsigned char pc1m[56], pcr[56];
                     71:        unsigned long kn[32];
                     72: 
                     73:        for ( j = 0; j < 56; j++ ) {
                     74:                l = pc1[j];
                     75:                m = l & 07;
                     76:                pc1m[j] = (key[l >> 3] & bytebit[m]) ? 1 : 0;
                     77:                }
                     78:        for( i = 0; i < 16; i++ ) {
                     79:                if( edf == DE1 ) m = (15 - i) << 1;
                     80:                else m = i << 1;
                     81:                n = m + 1;
                     82:                kn[m] = kn[n] = 0L;
                     83:                for( j = 0; j < 28; j++ ) {
                     84:                        l = j + totrot[i];
                     85:                        if( l < 28 ) pcr[j] = pc1m[l];
                     86:                        else pcr[j] = pc1m[l - 28];
                     87:                        }
                     88:                for( j = 28; j < 56; j++ ) {
                     89:                    l = j + totrot[i];
                     90:                    if( l < 56 ) pcr[j] = pc1m[l];
                     91:                    else pcr[j] = pc1m[l - 28];
                     92:                    }
                     93:                for( j = 0; j < 24; j++ ) {
                     94:                        if( pcr[pc2[j]] ) kn[m] |= bigbyte[j];
                     95:                        if( pcr[pc2[j+24]] ) kn[n] |= bigbyte[j];
                     96:                        }
                     97:                }
                     98:        cookey(kn);
                     99:        return;
                    100:        }
                    101: 
1.1.1.2 ! root      102: static void cookey(register unsigned long *raw1)
1.1       root      103: {
                    104:        register unsigned long *cook, *raw0;
                    105:        unsigned long dough[32];
                    106:        register int i;
                    107: 
                    108:        cook = dough;
                    109:        for( i = 0; i < 16; i++, raw1++ ) {
                    110:                raw0 = raw1++;
                    111:                *cook    = (*raw0 & 0x00fc0000L) << 6;
                    112:                *cook   |= (*raw0 & 0x00000fc0L) << 10;
                    113:                *cook   |= (*raw1 & 0x00fc0000L) >> 10;
                    114:                *cook++ |= (*raw1 & 0x00000fc0L) >> 6;
                    115:                *cook    = (*raw0 & 0x0003f000L) << 12;
                    116:                *cook   |= (*raw0 & 0x0000003fL) << 16;
                    117:                *cook   |= (*raw1 & 0x0003f000L) >> 4;
                    118:                *cook++ |= (*raw1 & 0x0000003fL);
                    119:                }
                    120:        usekey(dough);
                    121:        return;
                    122:        }
                    123: 
1.1.1.2 ! root      124: void cpkey(register unsigned long *into)
1.1       root      125: {
                    126:        register unsigned long *from, *endp;
                    127: 
                    128:        from = KnL, endp = &KnL[32];
                    129:        while( from < endp ) *into++ = *from++;
                    130:        return;
                    131:        }
                    132: 
1.1.1.2 ! root      133: void usekey(register unsigned long *from)
1.1       root      134: {
                    135:        register unsigned long *to, *endp;
                    136: 
                    137:        to = KnL, endp = &KnL[32];
                    138:        while( to < endp ) *to++ = *from++;
                    139:        return;
                    140:        }
                    141: 
1.1.1.2 ! root      142: void des(unsigned char *inblock, unsigned char *outblock)
1.1       root      143: {
                    144:        unsigned long work[2];
                    145: 
                    146:        scrunch(inblock, work);
                    147:        desfunc(work, KnL);
                    148:        unscrun(work, outblock);
                    149:        return;
                    150:        }
                    151: 
1.1.1.2 ! root      152: static void scrunch(register unsigned char *outof, register unsigned long *into)
1.1       root      153: {
                    154:        *into    = (*outof++ & 0xffL) << 24;
                    155:        *into   |= (*outof++ & 0xffL) << 16;
                    156:        *into   |= (*outof++ & 0xffL) << 8;
                    157:        *into++ |= (*outof++ & 0xffL);
                    158:        *into    = (*outof++ & 0xffL) << 24;
                    159:        *into   |= (*outof++ & 0xffL) << 16;
                    160:        *into   |= (*outof++ & 0xffL) << 8;
                    161:        *into   |= (*outof   & 0xffL);
                    162:        return;
                    163:        }
                    164: 
1.1.1.2 ! root      165: static void unscrun(register unsigned long *outof, register unsigned char *into)
1.1       root      166: {
                    167:        *into++ = (unsigned char)((*outof >> 24) & 0xffL);
                    168:        *into++ = (unsigned char)((*outof >> 16) & 0xffL);
                    169:        *into++ = (unsigned char)((*outof >>  8) & 0xffL);
                    170:        *into++ = (unsigned char)(*outof++       & 0xffL);
                    171:        *into++ = (unsigned char)((*outof >> 24) & 0xffL);
                    172:        *into++ = (unsigned char)((*outof >> 16) & 0xffL);
                    173:        *into++ = (unsigned char)((*outof >>  8) & 0xffL);
                    174:        *into   =  (unsigned char)(*outof        & 0xffL);
                    175:        return;
                    176:        }
                    177: 
1.1.1.2 ! root      178: static const unsigned long SP1[64] = {
1.1       root      179:        0x01010400L, 0x00000000L, 0x00010000L, 0x01010404L,
                    180:        0x01010004L, 0x00010404L, 0x00000004L, 0x00010000L,
                    181:        0x00000400L, 0x01010400L, 0x01010404L, 0x00000400L,
                    182:        0x01000404L, 0x01010004L, 0x01000000L, 0x00000004L,
                    183:        0x00000404L, 0x01000400L, 0x01000400L, 0x00010400L,
                    184:        0x00010400L, 0x01010000L, 0x01010000L, 0x01000404L,
                    185:        0x00010004L, 0x01000004L, 0x01000004L, 0x00010004L,
                    186:        0x00000000L, 0x00000404L, 0x00010404L, 0x01000000L,
                    187:        0x00010000L, 0x01010404L, 0x00000004L, 0x01010000L,
                    188:        0x01010400L, 0x01000000L, 0x01000000L, 0x00000400L,
                    189:        0x01010004L, 0x00010000L, 0x00010400L, 0x01000004L,
                    190:        0x00000400L, 0x00000004L, 0x01000404L, 0x00010404L,
                    191:        0x01010404L, 0x00010004L, 0x01010000L, 0x01000404L,
                    192:        0x01000004L, 0x00000404L, 0x00010404L, 0x01010400L,
                    193:        0x00000404L, 0x01000400L, 0x01000400L, 0x00000000L,
                    194:        0x00010004L, 0x00010400L, 0x00000000L, 0x01010004L };
                    195: 
1.1.1.2 ! root      196: static const unsigned long SP2[64] = {
1.1       root      197:        0x80108020L, 0x80008000L, 0x00008000L, 0x00108020L,
                    198:        0x00100000L, 0x00000020L, 0x80100020L, 0x80008020L,
                    199:        0x80000020L, 0x80108020L, 0x80108000L, 0x80000000L,
                    200:        0x80008000L, 0x00100000L, 0x00000020L, 0x80100020L,
                    201:        0x00108000L, 0x00100020L, 0x80008020L, 0x00000000L,
                    202:        0x80000000L, 0x00008000L, 0x00108020L, 0x80100000L,
                    203:        0x00100020L, 0x80000020L, 0x00000000L, 0x00108000L,
                    204:        0x00008020L, 0x80108000L, 0x80100000L, 0x00008020L,
                    205:        0x00000000L, 0x00108020L, 0x80100020L, 0x00100000L,
                    206:        0x80008020L, 0x80100000L, 0x80108000L, 0x00008000L,
                    207:        0x80100000L, 0x80008000L, 0x00000020L, 0x80108020L,
                    208:        0x00108020L, 0x00000020L, 0x00008000L, 0x80000000L,
                    209:        0x00008020L, 0x80108000L, 0x00100000L, 0x80000020L,
                    210:        0x00100020L, 0x80008020L, 0x80000020L, 0x00100020L,
                    211:        0x00108000L, 0x00000000L, 0x80008000L, 0x00008020L,
                    212:        0x80000000L, 0x80100020L, 0x80108020L, 0x00108000L };
                    213: 
1.1.1.2 ! root      214: static const unsigned long SP3[64] = {
1.1       root      215:        0x00000208L, 0x08020200L, 0x00000000L, 0x08020008L,
                    216:        0x08000200L, 0x00000000L, 0x00020208L, 0x08000200L,
                    217:        0x00020008L, 0x08000008L, 0x08000008L, 0x00020000L,
                    218:        0x08020208L, 0x00020008L, 0x08020000L, 0x00000208L,
                    219:        0x08000000L, 0x00000008L, 0x08020200L, 0x00000200L,
                    220:        0x00020200L, 0x08020000L, 0x08020008L, 0x00020208L,
                    221:        0x08000208L, 0x00020200L, 0x00020000L, 0x08000208L,
                    222:        0x00000008L, 0x08020208L, 0x00000200L, 0x08000000L,
                    223:        0x08020200L, 0x08000000L, 0x00020008L, 0x00000208L,
                    224:        0x00020000L, 0x08020200L, 0x08000200L, 0x00000000L,
                    225:        0x00000200L, 0x00020008L, 0x08020208L, 0x08000200L,
                    226:        0x08000008L, 0x00000200L, 0x00000000L, 0x08020008L,
                    227:        0x08000208L, 0x00020000L, 0x08000000L, 0x08020208L,
                    228:        0x00000008L, 0x00020208L, 0x00020200L, 0x08000008L,
                    229:        0x08020000L, 0x08000208L, 0x00000208L, 0x08020000L,
                    230:        0x00020208L, 0x00000008L, 0x08020008L, 0x00020200L };
                    231: 
1.1.1.2 ! root      232: static const unsigned long SP4[64] = {
1.1       root      233:        0x00802001L, 0x00002081L, 0x00002081L, 0x00000080L,
                    234:        0x00802080L, 0x00800081L, 0x00800001L, 0x00002001L,
                    235:        0x00000000L, 0x00802000L, 0x00802000L, 0x00802081L,
                    236:        0x00000081L, 0x00000000L, 0x00800080L, 0x00800001L,
                    237:        0x00000001L, 0x00002000L, 0x00800000L, 0x00802001L,
                    238:        0x00000080L, 0x00800000L, 0x00002001L, 0x00002080L,
                    239:        0x00800081L, 0x00000001L, 0x00002080L, 0x00800080L,
                    240:        0x00002000L, 0x00802080L, 0x00802081L, 0x00000081L,
                    241:        0x00800080L, 0x00800001L, 0x00802000L, 0x00802081L,
                    242:        0x00000081L, 0x00000000L, 0x00000000L, 0x00802000L,
                    243:        0x00002080L, 0x00800080L, 0x00800081L, 0x00000001L,
                    244:        0x00802001L, 0x00002081L, 0x00002081L, 0x00000080L,
                    245:        0x00802081L, 0x00000081L, 0x00000001L, 0x00002000L,
                    246:        0x00800001L, 0x00002001L, 0x00802080L, 0x00800081L,
                    247:        0x00002001L, 0x00002080L, 0x00800000L, 0x00802001L,
                    248:        0x00000080L, 0x00800000L, 0x00002000L, 0x00802080L };
                    249: 
1.1.1.2 ! root      250: static const unsigned long SP5[64] = {
1.1       root      251:        0x00000100L, 0x02080100L, 0x02080000L, 0x42000100L,
                    252:        0x00080000L, 0x00000100L, 0x40000000L, 0x02080000L,
                    253:        0x40080100L, 0x00080000L, 0x02000100L, 0x40080100L,
                    254:        0x42000100L, 0x42080000L, 0x00080100L, 0x40000000L,
                    255:        0x02000000L, 0x40080000L, 0x40080000L, 0x00000000L,
                    256:        0x40000100L, 0x42080100L, 0x42080100L, 0x02000100L,
                    257:        0x42080000L, 0x40000100L, 0x00000000L, 0x42000000L,
                    258:        0x02080100L, 0x02000000L, 0x42000000L, 0x00080100L,
                    259:        0x00080000L, 0x42000100L, 0x00000100L, 0x02000000L,
                    260:        0x40000000L, 0x02080000L, 0x42000100L, 0x40080100L,
                    261:        0x02000100L, 0x40000000L, 0x42080000L, 0x02080100L,
                    262:        0x40080100L, 0x00000100L, 0x02000000L, 0x42080000L,
                    263:        0x42080100L, 0x00080100L, 0x42000000L, 0x42080100L,
                    264:        0x02080000L, 0x00000000L, 0x40080000L, 0x42000000L,
                    265:        0x00080100L, 0x02000100L, 0x40000100L, 0x00080000L,
                    266:        0x00000000L, 0x40080000L, 0x02080100L, 0x40000100L };
                    267: 
1.1.1.2 ! root      268: static const unsigned long SP6[64] = {
1.1       root      269:        0x20000010L, 0x20400000L, 0x00004000L, 0x20404010L,
                    270:        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: 
1.1.1.2 ! root      286: static const unsigned long SP7[64] = {
1.1       root      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: 
1.1.1.2 ! root      304: static const unsigned long SP8[64] = {
1.1       root      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: 
1.1.1.2 ! root      322: static void desfunc(register unsigned long *block, register unsigned long *keys)
1.1       root      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:  **********************************************************************/

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