d3des.c
上传用户:qd_success
上传日期:2013-04-09
资源大小:8k
文件大小:20k
- /* 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 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;
- {
- 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++ = (*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)
- register unsigned long *block, *keys;
- {
- register unsigned long fval, work, right, leftt;
- register 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);
- work = ((right >> 8) ^ leftt) & 0x00ff00ffL;
- leftt ^= work;
- right ^= (work << 8);
- right = ((right << 1) | ((right >> 31) & 1L)) & 0xffffffffL;
- work = (leftt ^ right) & 0xaaaaaaaaL;
- leftt ^= work;
- right ^= work;
- leftt = ((leftt << 1) | ((leftt >> 31) & 1L)) & 0xffffffffL;
- for( round = 0; round < 8; round++ ) {
- work = (right << 28) | (right >> 4);
- work ^= *keys++;
- fval = SP7[ work & 0x3fL];
- fval |= SP5[(work >> 8) & 0x3fL];
- fval |= SP3[(work >> 16) & 0x3fL];
- fval |= SP1[(work >> 24) & 0x3fL];
- work = right ^ *keys++;
- fval |= SP8[ work & 0x3fL];
- fval |= SP6[(work >> 8) & 0x3fL];
- fval |= SP4[(work >> 16) & 0x3fL];
- fval |= SP2[(work >> 24) & 0x3fL];
- leftt ^= fval;
- work = (leftt << 28) | (leftt >> 4);
- work ^= *keys++;
- fval = SP7[ work & 0x3fL];
- fval |= SP5[(work >> 8) & 0x3fL];
- fval |= SP3[(work >> 16) & 0x3fL];
- fval |= SP1[(work >> 24) & 0x3fL];
- work = leftt ^ *keys++;
- fval |= SP8[ work & 0x3fL];
- fval |= SP6[(work >> 8) & 0x3fL];
- fval |= SP4[(work >> 16) & 0x3fL];
- fval |= SP2[(work >> 24) & 0x3fL];
- right ^= fval;
- }
- right = (right << 31) | (right >> 1);
- work = (leftt ^ right) & 0xaaaaaaaaL;
- leftt ^= work;
- right ^= work;
- leftt = (leftt << 31) | (leftt >> 1);
- work = ((leftt >> 8) ^ right) & 0x00ff00ffL;
- right ^= work;
- leftt ^= (work << 8);
- work = ((leftt >> 2) ^ right) & 0x33333333L;
- right ^= work;
- leftt ^= (work << 2);
- work = ((right >> 16) ^ leftt) & 0x0000ffffL;
- leftt ^= work;
- right ^= (work << 16);
- work = ((right >> 4) ^ leftt) & 0x0f0f0f0fL;
- leftt ^= work;
- right ^= (work << 4);
- *block++ = right;
- *block = leftt;
- return;
- }
- #ifdef D2_DES
- void des2key(hexkey, mode) /* stomps on Kn3 too */
- unsigned char *hexkey; /* unsigned char[16] */
- short mode;
- {
- short revmod;
- revmod = (mode == EN0) ? DE1 : EN0;
- deskey(&hexkey[8], revmod);
- cpkey(KnR);
- deskey(hexkey, mode);
- cpkey(Kn3); /* Kn3 = KnL */
- return;
- }
- void Ddes(from, into)
- unsigned char *from, *into; /* unsigned char[8] */
- {
- unsigned long work[2];
- scrunch(from, work);
- desfunc(work, KnL);
- desfunc(work, KnR);
- desfunc(work, Kn3);
- unscrun(work, into);
- return;
- }
- void D2des(from, into)
- unsigned char *from; /* unsigned char[16] */
- unsigned char *into; /* unsigned char[16] */
- {
- unsigned long *right, *l1, swap;
- unsigned long leftt[2], bufR[2];
- right = bufR;
- l1 = &leftt[1];
- scrunch(from, leftt);
- scrunch(&from[8], right);
- desfunc(leftt, KnL);
- desfunc(right, KnL);
- swap = *l1;
- *l1 = *right;
- *right = swap;
- desfunc(leftt, KnR);
- desfunc(right, KnR);
- swap = *l1;
- *l1 = *right;
- *right = swap;
- desfunc(leftt, Kn3);
- desfunc(right, Kn3);
- unscrun(leftt, into);
- unscrun(right, &into[8]);
- return;
- }
- void makekey(aptr, kptr)
- register char *aptr; /* NULL-terminated */
- register unsigned char *kptr; /* unsigned char[8] */
- {
- register unsigned char *store;
- register int first, i;
- unsigned long savek[96];
- cpDkey(savek);
- des2key(Df_Key, EN0);
- for( i = 0; i < 8; i++ ) kptr[i] = Df_Key[i];
- first = 1;
- while( (*aptr != ' ') || first ) {
- store = kptr;
- for( i = 0; i < 8 && (*aptr != ' '); i++ ) {
- *store++ ^= *aptr & 0x7f;
- *aptr++ = ' ';
- }
- Ddes(kptr, kptr);
- first = 0;
- }
- useDkey(savek);
- return;
- }
- void make2key(aptr, kptr)
- register char *aptr; /* NULL-terminated */
- register unsigned char *kptr; /* unsigned char[16] */
- {
- register unsigned char *store;
- register int first, i;
- unsigned long savek[96];
- cpDkey(savek);
- des2key(Df_Key, EN0);
- for( i = 0; i < 16; i++ ) kptr[i] = Df_Key[i];
- first = 1;
- while( (*aptr != ' ') || first ) {
- store = kptr;
- for( i = 0; i < 16 && (*aptr != ' '); i++ ) {
- *store++ ^= *aptr & 0x7f;
- *aptr++ = ' ';
- }
- D2des(kptr, kptr);
- first = 0;
- }
- useDkey(savek);
- return;
- }
- #ifndef D3_DES /* D2_DES only */
- #ifdef D2_DES /* iff D2_DES! */
- void cp2key(into)
- register unsigned long *into; /* unsigned long[64] */
- {
- register unsigned long *from, *endp;
- cpkey(into);
- into = &into[32];
- from = KnR, endp = &KnR[32];
- while( from < endp ) *into++ = *from++;
- return;
- }
- void use2key(from) /* stomps on Kn3 too */
- register unsigned long *from; /* unsigned long[64] */
- {
- register unsigned long *to, *endp;
- usekey(from);
- from = &from[32];
- to = KnR, endp = &KnR[32];
- while( to < endp ) *to++ = *from++;
- cpkey(Kn3); /* Kn3 = KnL */
- return;
- }
- #endif /* iff D2_DES */
- #else /* D3_DES too */
- static void D3des(unsigned char *, unsigned char *);
- void des3key(hexkey, mode)
- unsigned char *hexkey; /* unsigned char[24] */
- short mode;
- {
- unsigned char *first, *third;
- short revmod;
- if( mode == EN0 ) {
- revmod = DE1;
- first = hexkey;
- third = &hexkey[16];
- }
- else {
- revmod = EN0;
- first = &hexkey[16];
- third = hexkey;
- }
- deskey(&hexkey[8], revmod);
- cpkey(KnR);
- deskey(third, mode);
- cpkey(Kn3);
- deskey(first, mode);
- return;
- }
- void cp3key(into)
- register unsigned long *into; /* unsigned long[96] */
- {
- register unsigned long *from, *endp;
- cpkey(into);
- into = &into[32];
- from = KnR, endp = &KnR[32];
- while( from < endp ) *into++ = *from++;
- from = Kn3, endp = &Kn3[32];
- while( from < endp ) *into++ = *from++;
- return;
- }
- void use3key(from)
- register unsigned long *from; /* unsigned long[96] */
- {
- register unsigned long *to, *endp;
- usekey(from);
- from = &from[32];
- to = KnR, endp = &KnR[32];
- while( to < endp ) *to++ = *from++;
- to = Kn3, endp = &Kn3[32];
- while( to < endp ) *to++ = *from++;
- return;
- }
- static void D3des(from, into) /* amateur theatrics */
- unsigned char *from; /* unsigned char[24] */
- unsigned char *into; /* unsigned char[24] */
- {
- unsigned long swap, leftt[2], middl[2], right[2];
- scrunch(from, leftt);
- scrunch(&from[8], middl);
- scrunch(&from[16], right);
- desfunc(leftt, KnL);
- desfunc(middl, KnL);
- desfunc(right, KnL);
- swap = leftt[1];
- leftt[1] = middl[0];
- middl[0] = swap;
- swap = middl[1];
- middl[1] = right[0];
- right[0] = swap;
- desfunc(leftt, KnR);
- desfunc(middl, KnR);
- desfunc(right, KnR);
- swap = leftt[1];
- leftt[1] = middl[0];
- middl[0] = swap;
- swap = middl[1];
- middl[1] = right[0];
- right[0] = swap;
- desfunc(leftt, Kn3);
- desfunc(middl, Kn3);
- desfunc(right, Kn3);
- unscrun(leftt, into);
- unscrun(middl, &into[8]);
- unscrun(right, &into[16]);
- return;
- }
- void make3key(aptr, kptr)
- register char *aptr; /* NULL-terminated */
- register unsigned char *kptr; /* unsigned char[24] */
- {
- register unsigned char *store;
- register int first, i;
- unsigned long savek[96];
- cp3key(savek);
- des3key(Df_Key, EN0);
- for( i = 0; i < 24; i++ ) kptr[i] = Df_Key[i];
- first = 1;
- while( (*aptr != ' ') || first ) {
- store = kptr;
- for( i = 0; i < 24 && (*aptr != ' '); i++ ) {
- *store++ ^= *aptr & 0x7f;
- *aptr++ = ' ';
- }
- D3des(kptr, kptr);
- first = 0;
- }
- use3key(savek);
- return;
- }
- #endif /* D3_DES */
- #endif /* D2_DES */
- /* Validation sets:
- *
- * Single-length key, single-length plaintext -
- * Key : 0123 4567 89ab cdef
- * Plain : 0123 4567 89ab cde7
- * Cipher : c957 4425 6a5e d31d
- *
- * Double-length key, single-length plaintext -
- * Key : 0123 4567 89ab cdef fedc ba98 7654 3210
- * Plain : 0123 4567 89ab cde7
- * Cipher : 7f1d 0a77 826b 8aff
- *
- * Double-length key, double-length plaintext -
- * Key : 0123 4567 89ab cdef fedc ba98 7654 3210
- * Plain : 0123 4567 89ab cdef 0123 4567 89ab cdff
- * Cipher : 27a0 8440 406a df60 278f 47cf 42d6 15d7
- *
- * Triple-length key, single-length plaintext -
- * Key : 0123 4567 89ab cdef fedc ba98 7654 3210 89ab cdef 0123 4567
- * Plain : 0123 4567 89ab cde7
- * Cipher : de0b 7c06 ae5e 0ed5
- *
- * Triple-length key, double-length plaintext -
- * Key : 0123 4567 89ab cdef fedc ba98 7654 3210 89ab cdef 0123 4567
- * Plain : 0123 4567 89ab cdef 0123 4567 89ab cdff
- * Cipher : ad0d 1b30 ac17 cf07 0ed1 1c63 81e4 4de5
- *
- * d3des V5.0a rwo 9208.07 18:44 Graven Imagery
- **********************************************************************/