VPF::Помогите разобраться с реализацией DES

Splendid

Дата 27.3.2008, 17:03 (ссылка)

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Регистрация: 1.8.2007
Где: Беларусь, Минск

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Всего: нет

Есть код на СИ:
Алгоритм ясен, но на Си никогда не писала, не могли бы вы мне помочь со смыслом процедур, прокоментировать хоть как-нибудь эту прогу....Буду очень признательна!

Код


#define EN0   0      /* MODE == encrypt */
#define DE1   1      /* MODE == decrypt */

#include <iostream.h>
#include <сstring.h>

typedef struct {
 unsigned long ek[32];
unsigned long dk[32];
} des_ctx;

extern void deskey(unsigned char *, short);
extern void usekey(unsigned long *);
extern void cpkey(unsigned long *);
extern void des(unsigned char *, unsigned char *);
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   };


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(unsigned char *key, short edf)  {
 /* Thanks to James Gillogly & Phil Karn! */
 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;
     if( l < 28 ) pcr[j] = pc1m[l];
     else pcr[j] = pc1m[l - 28];
   }
   for( j = 28; j < 56; j++ ) {
     l = j + totrot;
     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);
}

static void cookey(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);
}

void cpkey(unsigned long *into)  {
 register unsigned long *from, *endp;

 from = KnL, endp = &KnL[32];
 while( from < endp ) *into++ = *from++;
}

void usekey(unsigned long *from)  {
 register unsigned long *to, *endp;

 to = KnL, endp = &KnL[32];
 while( to < endp ) *to++ = *from++;
}

#if 0
void des(unsigned char *inblock, unsigned char *outblock)  {
 unsigned long work[2];

 scrunch(inblock, work);
 desfunc(work, KnL);
 unscrun(work, outblock);
}
#endif

static void scrunch(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);
}

static void unscrun(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;
}

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(unsigned long *block, unsigned long *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;
}



void des_key(des_ctx *dc, unsigned char *key){
 deskey(key,EN0);
 cpkey(dc->ek);
 deskey(key,DE1);
 cpkey(dc->dk);
}

/* Encrypt several blocks in ECB mode.  Caller is responsible for
  short blocks. */
void des_enc(des_ctx *dc, unsigned char *Data, int blocks){
 unsigned long work[2];
 int i;
 unsigned char *cp;

 cp = Data;
 for(i=0;i<blocks;i++){
   scrunch(cp,work);
   desfunc(work,dc->ek);
   unscrun(work,cp);
   cp+=8;
 }
}

void des_dec(des_ctx *dc, unsigned char *Data, int blocks){
 unsigned long work[2];
 int i;
 unsigned char *cp;

 cp = Data;
 for(i=0;i<blocks;i++){
   scrunch(cp,work);
   desfunc(work,dc->dk);
   unscrun(work,cp);
   cp+=8;
 }
}

void main(void){
 des_ctx dc;
 int i;
 unsigned long Data;
 char *cp,key[8];
 cout<<"\nVvedite key: ";
 for (i=0;i<8;i++) cin>>key;
 cout<<"\nVvedite text: ";
 cin >> cp;
 unsigned int   lVal;
 lVal = strlen(cp) % 8;
 if (lVal != 0) Data= strlen(cp) + 8 - lVal;
 else Data=strlen(cp);
 char x[Data];
 x =cp;

 des_key(&dc,key);

 for (i=0;i<strlen(x)/8;i++) des_enc(&dc,x,i);
 cout<<"\nEncrypt text:";
 cout<<x;
 for (i=0;i<strlen(x)/8;i++)  des_dec(&dc,x,i);
 cout<<"\nDecrypt text:";
 cout<<x;
 while (1);

}

И еще, код выдает ошибку:

F:\Program Files\Microsoft Visual Studio\MyProjects\ex\forum(shnaier).cpp(5) : fatal error C1083: Cannot open include file: 'сstring.h': No such file or directory

пыталась найти в нете этот заголовочный файлик - безрезультатно....

Alek86

Дата 27.3.2008, 17:15 (ссылка)

(нет голосов)

Загрузка ...

Эксперт

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Репутация: 21
Всего: 25

1. боюсь немногие найдутся, кто просто так за тебя будет лазить по брейнфакерскому коду... :(

2.

Цитата(Splendid @ 27.3.2008, 17:03

)

попробуй поменяй строку
#include <сstring.h>
на
#include <string.h>

3. какая студия? Если шестая, то должно помочь. Если 2003 и больше, то удивительно, что компилит
#include <iostream.h>

4. Это код не C а старого С++.

--------------------

v2v

Дата 27.3.2008, 17:17 (ссылка)

(нет голосов)

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Эксперт

Профиль
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Всего: 56

в заголовочном файле куча коментов, правда на инглицком ;)

Код


00001 /*
00002  * This is D3DES (V5.09) by Richard Outerbridge with the double and
00003  * triple-length support removed for use in VNC.
00004  *
00005  * These changes are:
00006  *  Copyright © 1999 AT&T Laboratories Cambridge.  All Rights Reserved.
00007  *
00008  * This software is distributed in the hope that it will be useful,
00009  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00010  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
00011  */
00012 /* d3des.h -
00013  *
00014  *      Headers and defines for d3des.c
00015  *      Graven Imagery, 1992.
00016  *
00017  * Copyright © 1988,1989,1990,1991,1992 by Richard Outerbridge
00018  *      (GEnie : OUTER; CIS : [71755,204])
00019  */
00020 #ifndef D3DES_H
00021 #define D3DES_H
00022 
00023 #define EN0     0       /* MODE == encrypt */
00024 #define DE1     1       /* MODE == decrypt */
00025 
00026 extern void deskey(unsigned char *, int);
00027 /*                    hexkey[8]     MODE
00028  * Sets the internal key register according to the hexadecimal
00029  * key contained in the 8 bytes of hexkey, according to the DES,
00030  * for encryption or decryption according to MODE.
00031  */
00032 
00033 extern void usekey(unsigned long *);
00034 /*                  cookedkey[32]
00035  * Loads the internal key register with the data in cookedkey.
00036  */
00037 
00038 extern void cpkey(unsigned long *);
00039 /*                 cookedkey[32]
00040  * Copies the contents of the internal key register into the storage
00041  * located at &cookedkey[0].
00042  */
00043 
00044 extern void des(unsigned char *, unsigned char *);
00045 /*                  from[8]           to[8]
00046  * Encrypts/Decrypts (according to the key currently loaded in the
00047  * internal key register) one block of eight bytes at address 'from'
00048  * into the block at address 'to'.  They can be the same.
00049  */
00050 
00051 /* d3des.h V5.09 rwo 9208.04 15:06 Graven Imagery */
00052 
00053 #endif // D3DES_H

Добавлено @ 17:18
коменты - это то что между /* и */ ))

Это сообщение отредактировал(а) v2v - 27.3.2008, 17:18

--------------------

java блох

Splendid

Дата 27.3.2008, 17:25 (ссылка)

(нет голосов)

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Опытный

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Alek86,
#include <сstring.h>
на
#include <string.h> менять пробовала - выдает тогда кучу ошибок в проге. Студия 6-ая...

v2v,
а можно код целиком? (спасибо за просвещение по поводу комментов smile

))

Добавлено через 31 секунду
что с ошибкой то этой делать? В чем здесь проблема?

v2v

Дата 27.3.2008, 17:29 (ссылка)

(нет голосов)

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Эксперт

Профиль
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Регистрация: 20.9.2006
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Репутация: нет
Всего: 56

Код


/* d3des.h -
 *
 * Headers and defines for d3des.c
 * Graven Imagery, 1992.
 *
 * 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])
 */
 
#undef D2_DES        
#undef D3_DES        
 
#ifdef D3_DES
#ifndef D2_DES
#define D2_DES        /* D2_DES is needed for D3_DES */
#endif
#endif
    
#define EN0    0        /* MODE == encrypt */
#define DE1    1        /* MODE == decrypt */
 
/* Useful on 68000-ish machines, but NOT USED here. */
 
typedef union {
    unsigned long blok[2];
    unsigned short word[4];
    unsigned char byte[8];
    } M68K;
 
typedef union {
    unsigned long dblok[4];
    unsigned short dword[8];
    unsigned char dbyte[16];
    } M68K2;
 
extern void deskey(unsigned char *, short);
/*              hexkey[8]     MODE
 * Sets the internal key register according to the hexadecimal
 * key contained in the 8 bytes of hexkey, according to the DES,
 * for encryption or decryption according to MODE.
 */
 
extern void usekey(unsigned long *);
/*            cookedkey[32]
 * Loads the internal key register with the data in cookedkey.
 */
 
extern void cpkey(unsigned long *);
/*           cookedkey[32]
 * Copies the contents of the internal key register into the storage
 * located at &cookedkey[0].
 */
 
extern void des(unsigned char *, unsigned char *);
/*            from[8]          to[8]
 * Encrypts/Decrypts (according to the key currently loaded in the
 * internal key register) one block of eight bytes at address 'from'
 * into the block at address 'to'.  They can be the same.
 */
 
#ifdef D2_DES
 
#define desDkey(a,b)    des2key((a),(b))
extern void des2key(unsigned char *, short);
/*              hexkey[16]     MODE
 * Sets the internal key registerS according to the hexadecimal
 * keyS contained in the 16 bytes of hexkey, according to the DES,
 * for DOUBLE encryption or decryption according to MODE.
 * NOTE: this clobbers all three key registers!
 */
 
extern void Ddes(unsigned char *, unsigned char *);
/*            from[8]          to[8]
 * Encrypts/Decrypts (according to the keyS currently loaded in the
 * internal key registerS) one block of eight bytes at address 'from'
 * into the block at address 'to'.  They can be the same.
 */
 
extern void D2des(unsigned char *, unsigned char *);
/*            from[16]          to[16]
 * Encrypts/Decrypts (according to the keyS currently loaded in the
 * internal key registerS) one block of SIXTEEN bytes at address 'from'
 * into the block at address 'to'.  They can be the same.
 */
 
extern void makekey(char *, unsigned char *);
/*        *password,    single-length key[8]
 * With a double-length default key, this routine hashes a NULL-terminated
 * string into an eight-byte random-looking key, suitable for use with the
 * deskey() routine.
 */
 
#define makeDkey(a,b)    make2key((a),(b))
extern void make2key(char *, unsigned char *);
/*        *password,    double-length key[16]
 * With a double-length default key, this routine hashes a NULL-terminated
 * string into a sixteen-byte random-looking key, suitable for use with the
 * des2key() routine.
 */
 
#ifndef D3_DES    /* D2_DES only */
 
#define useDkey(a)    use2key((a))
#define cpDkey(a)    cp2key((a))
 
extern void use2key(unsigned long *);
/*            cookedkey[64]
 * Loads the internal key registerS with the data in cookedkey.
 * NOTE: this clobbers all three key registers!
 */
 
extern voi  cp2key(unsigned long *);
/*           cookedkey[64]
 * Copies the contents of the internal key registerS into the storage
 * located at &cookedkey[0].
 */
 
#else    /* D3_DES too */
 
#define useDkey(a)    use3key((a))
#define cpDkey(a)    cp3key((a))
 
extern void des3key(unsigned char *, short);
/*              hexkey[24]     MODE
 * Sets the internal key registerS according to the hexadecimal
 * keyS contained in the 24 bytes of hexkey, according to the DES,
 * for DOUBLE encryption or decryption according to MODE.
 */
 
extern void use3key(unsigned long *);
/*            cookedkey[96]
 * Loads the 3 internal key registerS with the data in cookedkey.
 */
 
extern void cp3key(unsigned long *);
/*           cookedkey[96]
 * Copies the contents of the 3 internal key registerS into the storage
 * located at &cookedkey[0].
 */
 
extern void make3key(char *, unsigned char *);
/*        *password,    triple-length key[24]
 * With a triple-length default key, this routine hashes a NULL-terminated
 * string into a twenty-four-byte random-looking key, suitable for use with
 * the des3key() routine.
 */
 
#endif    /* D3_DES */
#endif    /* D2_DES */
 
/* d3des.h V5.09 rwo 9208.04 15:06 Graven Imagery
 ********************************************************************/

Добавлено через 1 минуту и 40 секунд

Код


/* 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;
    }

#include "spr.h"
/* 
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);
    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)
char *aptr;                /* NULL-terminated  */
unsigned char *kptr;        /* unsigned char[8] */
{
    unsigned char *store;
    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 != '\0') || first ) {
        store = kptr;
        for( i = 0; i < 8 && (*aptr != '\0'); i++ ) {
            *store++ ^= *aptr & 0x7f;
            *aptr++ = '\0';
            }
        Ddes(kptr, kptr);
        first = 0;
        }
    useDkey(savek);
    return;
    }
 
void make2key(aptr, kptr)
char *aptr;                /* NULL-terminated   */
unsigned char *kptr;        /* unsigned char[16] */
{
    unsigned char *store;
    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 != '\0') || first ) {
        store = kptr;
        for( i = 0; i < 16 && (*aptr != '\0'); i++ ) {
            *store++ ^= *aptr & 0x7f;
            *aptr++ = '\0';
            }
        D2des(kptr, kptr);
        first = 0;
        }
    useDkey(savek);
    return;
    }
 
#ifndef D3_DES    /* D2_DES only */
 
void cp2key(into)
unsigned long *into;    /* unsigned long[64] */
{
    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 */
unsigned long *from;    /* unsigned long[64] */
{
    unsigned long *to, *endp;
 
    usekey(from);
    from = &from[32];
    to = KnR, endp = &KnR[32];
    while( to < endp ) *to++ = *from++;
    cpkey(Kn3);                    /* Kn3 = KnL */
    return;
    }
 
#else    /* D3_DES too */
 
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)
unsigned long *into;    /* unsigned long[96] */
{
    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)
unsigned long *from;    /* unsigned long[96] */
{
    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(unsigned char *, unsigned char *);
 
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)
char *aptr;                /* NULL-terminated   */
unsigned char *kptr;        /* unsigned char[24] */
{
    unsigned char *store;
    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 != '\0') || first ) {
        store = kptr;
        for( i = 0; i < 24 && (*aptr != '\0'); i++ ) {
            *store++ ^= *aptr & 0x7f;
            *aptr++ = '\0';
            }
        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 V5.09 rwo 9208.04 20:31 Graven Imagery
 **********************************************************************/

Добавлено через 2 минуты и 37 секунд
http://www.cs.cmu.edu/~dst/Adobe/Gallery/clit18/lib/des/

--------------------

java блох

Splendid

Дата 27.3.2008, 17:37 (ссылка)

(нет голосов)

Загрузка ...

Опытный

Профиль
Группа: Участник
Сообщений: 256
Регистрация: 1.8.2007
Где: Беларусь, Минск

Репутация: нет
Всего: нет

v2v, спасибо! Попробую еще в этом полазить....

Добавлено через 1 минуту и 17 секунд
и все-таки, объясните, что это за ошибка?

Splendid

Дата 28.3.2008, 09:52 (ссылка)

(нет голосов)

Загрузка ...

Опытный

Профиль
Группа: Участник
Сообщений: 256
Регистрация: 1.8.2007
Где: Беларусь, Минск

Репутация: нет
Всего: нет

Может у кого-нибудь есть реализация DES на СИ??? Не могу найти...поделитесь, пожалуйста...

Splendid

Дата 28.3.2008, 17:20 (ссылка)

(нет голосов)

Загрузка ...

Опытный

Профиль
Группа: Участник
Сообщений: 256
Регистрация: 1.8.2007
Где: Беларусь, Минск

Репутация: нет
Всего: нет

написала в итоге эти заголовки так:

#include <iostream.h>
#include <string.h>

выдает ошибки:

Код



Compiling...
des.c
F:\Program Files\Microsoft Visual Studio\MyProjects\1\des.c(73) : warning C4047: '=' : 'int ' differs in levels of indirection from 'unsigned char *'
F:\Program Files\Microsoft Visual Studio\MyProjects\1\des.c(78) : warning C4047: '=' : 'int ' differs in levels of indirection from 'unsigned char *'
F:\Program Files\Microsoft Visual Studio\MyProjects\1\des.c(146) : warning C4244: '=' : conversion from 'unsigned long ' to 'unsigned char ', possible loss of data
F:\Program Files\Microsoft Visual Studio\MyProjects\1\des.c(147) : warning C4244: '=' : conversion from 'unsigned long ' to 'unsigned char ', possible loss of data
F:\Program Files\Microsoft Visual Studio\MyProjects\1\des.c(148) : warning C4244: '=' : conversion from 'unsigned long ' to 'unsigned char ', possible loss of data
F:\Program Files\Microsoft Visual Studio\MyProjects\1\des.c(149) : warning C4244: '=' : conversion from 'unsigned long ' to 'unsigned char ', possible loss of data
F:\Program Files\Microsoft Visual Studio\MyProjects\1\des.c(150) : warning C4244: '=' : conversion from 'unsigned long ' to 'unsigned char ', possible loss of data
F:\Program Files\Microsoft Visual Studio\MyProjects\1\des.c(151) : warning C4244: '=' : conversion from 'unsigned long ' to 'unsigned char ', possible loss of data
F:\Program Files\Microsoft Visual Studio\MyProjects\1\des.c(152) : warning C4244: '=' : conversion from 'unsigned long ' to 'unsigned char ', possible loss of data
F:\Program Files\Microsoft Visual Studio\MyProjects\1\des.c(153) : warning C4244: '=' : conversion from 'unsigned long ' to 'unsigned char ', possible loss of data
F:\Program Files\Microsoft Visual Studio\MyProjects\1\des.c(416) : error C2065: 'cout' : undeclared identifier
F:\Program Files\Microsoft Visual Studio\MyProjects\1\des.c(416) : error C2297: '<<' : illegal, right operand has type 'char [15]'
F:\Program Files\Microsoft Visual Studio\MyProjects\1\des.c(417) : error C2065: 'cin' : undeclared identifier
F:\Program Files\Microsoft Visual Studio\MyProjects\1\des.c(417) : error C2297: '>>' : illegal, right operand has type 'char [8]'
F:\Program Files\Microsoft Visual Studio\MyProjects\1\des.c(418) : error C2297: '<<' : illegal, right operand has type 'char [16]'
F:\Program Files\Microsoft Visual Studio\MyProjects\1\des.c(419) : error C2297: '>>' : illegal, right operand has type 'char *'
F:\Program Files\Microsoft Visual Studio\MyProjects\1\des.c(420) : error C2143: syntax error : missing ';' before 'type'
F:\Program Files\Microsoft Visual Studio\MyProjects\1\des.c(421) : error C2065: 'lVal' : undeclared identifier
F:\Program Files\Microsoft Visual Studio\MyProjects\1\des.c(424) : error C2143: syntax error : missing ';' before 'type'
F:\Program Files\Microsoft Visual Studio\MyProjects\1\des.c(425) : error C2065: 'x' : undeclared identifier
F:\Program Files\Microsoft Visual Studio\MyProjects\1\des.c(425) : warning C4047: '=' : 'int ' differs in levels of indirection from 'char *'
F:\Program Files\Microsoft Visual Studio\MyProjects\1\des.c(429) : warning C4047: 'function' : 'const char *' differs in levels of indirection from 'int '
F:\Program Files\Microsoft Visual Studio\MyProjects\1\des.c(429) : warning C4024: 'strlen' : different types for formal and actual parameter 1
F:\Program Files\Microsoft Visual Studio\MyProjects\1\des.c(429) : warning C4018: '<' : signed/unsigned mismatch
F:\Program Files\Microsoft Visual Studio\MyProjects\1\des.c(429) : warning C4047: 'function' : 'unsigned char *' differs in levels of indirection from 'int '
F:\Program Files\Microsoft Visual Studio\MyProjects\1\des.c(429) : warning C4024: 'des_enc' : different types for formal and actual parameter 2
F:\Program Files\Microsoft Visual Studio\MyProjects\1\des.c(430) : error C2297: '<<' : illegal, right operand has type 'char [15]'
F:\Program Files\Microsoft Visual Studio\MyProjects\1\des.c(431) : warning C4552: '<<' : operator has no effect; expected operator with side-effect
F:\Program Files\Microsoft Visual Studio\MyProjects\1\des.c(432) : warning C4047: 'function' : 'const char *' differs in levels of indirection from 'int '
F:\Program Files\Microsoft Visual Studio\MyProjects\1\des.c(432) : warning C4024: 'strlen' : different types for formal and actual parameter 1
F:\Program Files\Microsoft Visual Studio\MyProjects\1\des.c(432) : warning C4018: '<' : signed/unsigned mismatch
F:\Program Files\Microsoft Visual Studio\MyProjects\1\des.c(432) : warning C4047: 'function' : 'unsigned char *' differs in levels of indirection from 'int '
F:\Program Files\Microsoft Visual Studio\MyProjects\1\des.c(432) : warning C4024: 'des_dec' : different types for formal and actual parameter 2
F:\Program Files\Microsoft Visual Studio\MyProjects\1\des.c(433) : error C2297: '<<' : illegal, right operand has type 'char [15]'
F:\Program Files\Microsoft Visual Studio\MyProjects\1\des.c(434) : warning C4552: '<<' : operator has no effect; expected operator with side-effect
Error executing cl.exe.

des.exe - 12 error(s), 23 warning(s)

эдесь:

Код


411 void main(void){
412 des_ctx dc;
413 int i;
414 unsigned long Data;
415 char *cp,key[8];
416 cout<<"\nVvedite key: ";
417 for (i=0;i<8;i++) cin>>key;
418 cout<<"\nVvedite text: ";
419 cin >> cp;
420 unsigned int lVal;
421 lVal = strlen(cp) % 8;
422 if (lVal != 0) Data= strlen(cp) + 8 - lVal;
423 else Data=strlen(cp);
424 char x[Data];
425 x =cp;
426
427 des_key(&dc,key);
428
429 for (i=0;i<strlen(x)/8;i++) des_enc(&dc,x,i);
430 cout<<"\nEncrypt text:";
431 cout<<x;
432 for (i=0;i<strlen(x)/8;i++) des_dec(&dc,x,i);
433 cout<<"\nDecrypt text:";
434 cout<<x;
435 while (1);
436
437}

Что с этим делать? smile

:
Помогите исправить, пожалуйста!!!!

Это сообщение отредактировал(а) Splendid - 28.3.2008, 17:22

chipset

Дата 30.3.2008, 00:08 (ссылка)

(нет голосов)

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Эксперт

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using namespace std; вставь куданить

--------------------

Цитата(Jimi Hendrix)

Well, I stand up next to a mountain
And I chop it down with the edge of my hand

Splendid

Дата 31.3.2008, 13:01 (ссылка)

(нет голосов)

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Опытный

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Спасибо! С ошибками разобралась.

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