Необходимо отладить программу светофор

#define EN0     0          /* MODE == encrypt */
#define DE1     1          /* MODE == decrypt */
 
typedef struct {
    unsigned long ek[32];
    unsigned long dk[32];
} des_ctx;
 
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/Descrypts (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.
*/
 
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,
      0xef,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 Standart (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 };
 
voiddeskey(key, edf) 
unsigned char *key; 
shortedf;
{
registerint 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;
   pc1[j] = (key[1 >> 3] &bytebit[m]) ? 1 : 0;
   }
for(i = 0 < 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]; 
        elsepcr[j] = pc1m[l – 28];
        }
for( j = 28; j < 56; j++ ) {
   l = j + totrot[i];
   if( l < 56 ) pcr[j] = pc1m[l];
   elsepcr[j] = pc1m[l – 28];
   }
for( j = 0; j < 24; j++ ) {
   if(pcr[pc2[j]] ) kn[m] |= bigbyte[j];
   if(pcr[pc2[j+24]] ) kn[m] |= bigbyte[j];
   }
}
cookey(kn);
return;
}
 
static void cookey(raw1) 
register unsigned long *raw1;
{
   register unsigned long *cook, *raw0;
   unsigned long dough[32];
   registerint 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;
}
 
voidcpkey(into)
register unsigned long *into;
{
      register unsigned long *from, *endp; 
      from = KnL, endp = &KnL[32];
      while ( from <endp ) *into++=*from++;
      return;
}
 
voidusekey(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 (out of, into)
register unsigned char *outof;
register unsigned long *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, 0x00100020L, 0x80008020L, 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]={
      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 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, left;
      registerint round;
 
      leftt = block[0];
      right = block[1];
 
      work = ((leftt>> 4) ^ right) & 0x0f0f0f0fL; 
      right ^= work;
      leftt ^= (work << 4);
      work = ((work >> 16) ^ right) & 0x0000ffffL; 
      right ^= work;
      leftt ^= (work << 16);
      work = ((leftt>> 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 = (left ^ right) & 0xaaaaaaaaL;
      leftt ^= work; 
      right ^= work;
      leftt = ((leftt<< 1) | ((leftt<< 31) & 1L)) & 0xffffffffL;
 
      for( round = 0; round < 8; roud++ ) {
            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;
            left = (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;
      }
 
      /* Validation sets:
      *
      * Single-length key, single- length plaintext –
      * Key    : 0123 4567 89ab cdef
      * Plain : 0123 4567 89ab cde7
      * Cipher : c957 4425 6a5e d31d
      *
*****************************************************************/
      voiddes_key(des_ctx *dc, unsigned char *key){
            deskey(key,EN0); 
            cpkey(dc->ek);
            deskey(key,DE1); 
            cpkey(dc->dk);
      }
 
      /* Encript several bloks in ECB mode. Caller is responsible for short blocks. */
      voiddes_enc(des_ctx *dc, unsigned char *data, int blocks){ 
            unsigned longwork[2];
            inti;
            unsigned char *cp;
 
            cp = data; 
            for(i=0;i<blocks;i++){
                        scrunch(cp,work); 
                        desfunc(work,dc->ek); 
                        unscrun(work,cp); 
                        cp+=8;
            }
      }
 
      voiddes_dec(des_ctx *dc, unsigned char *data, int blocks){
            unsigned long work[2];
            inti;
            unsigned char *cp;
 
                        cp = data;
                        for(i=0;i<blocks;i++){
                        scrunch(cp,work); 
                        desfunc(work,dc->ek); 
                        unscrun(work,cp); 
                        cp+=8;
            }
      }
 
      voiddes_dec(des_ctx *dc, unsigned char *, intblokcs){
            unsigned long work[2];
            inti;
            unsigned char *cp;
 
                        cp = data; 
                        for(i=0;i<blocks;i++){
                        scrunch(cp,work); 
                        desfunc(work,dc->ek); 
                        unscrun(work,cp); 
                        cp+=8;
            }
      }
      void main(void){
            des_ctx dc; 
            int ;
            unsigned long data[10];
            char *cp,key[8] = {0x01,0x23,0x45,0x67,0x89,0xab,0xcd,0xef};
            char x[8] = {0x01,0x23,0x45,0x67,0x89,0xab,0xcd,0xe7};
 
            cp = x; 
            des_key(&dc,key);
            des_enc(&dc,cp,1);
printf(“Enc(0..7,0..7) = “);
for(i=0;i<8;i++) printf(“%02x “, ((unsigned int) cp[i])&0x00ff); 
            printf(“\n”);
des_dec(&dc,cp,1);
 
            printf(“Dec(above,0..7) = “);
            for(i=0;i<8;i++) printf(“%02x “, ((unsigned int) cp[i])&0x00ff);
printf(“\n”);
 
            cp = (char *) data;
            for(i=0;i<10;i++)data[i]=I;
 
            des_enc(&dc,cp,5); /* Enc 5 blocks. */
            for(i=0;i<10;i+=2) printf(“Block %01d = %081x %081x.\n”, i/2,data[i],data[i+1]);
 
des_dec(&dc,cp,1);
            des_dec(&dc,cp+8,4);
            for(i=0;i<10;i+=2) printf(“Block %01d = %081x %081x.\n”, i/2,data[i],data[i+1]);
 
}