Ремонт принтеров, сканнеров, факсов и остальной офисной техники


назад Оглавление вперед




[190]

work = ((leftt>>4) л right) & 0x0f0f0f0fL;

right A= work;

leftt л= (work<<4);

work = ((leftt>>16) л right) & 0x0000ffffL;

right A= work;

leftt л= (work<<16);

work = ((right>>2) л leftt) & 0x33333333L;

leftt A= work;

right A= (work<<2);

work = ((right>>8) л leftt) & 0x00ff00ffL;

leftt A= work;

right A= (work<<8);

right = ((right << 1) ((right >> 31) & 1L)) & 0xffffffffL;

work = (leftt A right) & 0xaaaaaaaaL; leftt A= work; right a= work;

leftt = ((leftt << 1) ((leftt >> 31) & 1L)) & 0xffffffffL;

for( round = 0; round < 8; round++ ) {

work = (right << 28) (right >> 4); work a= *keys++;

fval = SP7[ work& 0x3fL];

fval = SP5[(work >> 8) & 0x3fL]; fval = SP3[(work >> 16) & 0x3fL]; fval = SP1[(work >> 24) & 0x3fL];

work = right a *keys++;

fval = SP8[ work& 0x3fL];

fval = SP6[(work>> 8) & 0x3fL];

fval = SP4[(work>> 16) & 0x3fL];

fval = SP2[(work>> 24) & 0x3fL]; leftt A= fval;

work = (leftt <<28) (leftt >> 4);

work a= *keys++;

fval = SP7[ work& 0x3fL];

fval = SP5[(work>> 8) & 0x3fL];

fval = SP3[(work>> 16) & 0x3fL];

fval = SP1[(work>> 24) & 0x3fL];

work = leftt a *keys++;

fval=SP8[ work& 0x3fL];

fval=SP6[(work>>8)&0x3fL];

fval=SP4[(work>>16)&0x3fL];

fval=SP2[(work>>24)&0x3fL];

right A= fval; }

right = (right << 31) (right >> 1);

work = (leftt A right) & 0xaaaaaaaaL; leftt A= work; right A= work;

leftt = (leftt << 31) (leftt >> 1);

work = ((leftt >> 8) A right) & 0x00ff00ffL;

right A= work;

leftt A= (work << 8);

work = ((leftt >> 2) A right) & 0x33333333L;

right A= work;

leftt A= (work << 2);

work = ((right >> 16) A leftt) & 0x0000ffffL;

leftt A= work;

right A= (work << 16);

work = ((right >> 4) A leftt) & 0x0f0f0f0fL;

leftt A= work;

right A= (work << 4);


*block++ = right; *block = leftt; return;

cp = x;

des key(&dc,key);

/* Validation sets:

*Single-length key, single-length plaintext -

*Key : 0123 4567 89ab cdef

*Plain : 0123 4567 89ab cde7

*Cipher : c957 4425 6a5e d31d

**********************************************************************/

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[10];

char *cp,key[8] = {0x01,0x23,0x45,0x67,0x89,0xab,0xcd,0xef}; char x[8] = {0x01,0x23,0x45,0x67,0x89,0xab,0xcd,0xe7};


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 = %08lx %08lx.\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 = %08lx %08lx.\n",

i/2,data[i],data[i+1]);

#include <stdio.h>

#define LOKIBLK8/* No of bytes in a LOKI data-block

#define ROUNDS16/* No of LOKI rounds

typedef unsigned longLong; /* type specification for aligned

LOKI blocks */

extern Long lokikey[2];/* 64-bit key used by LOKI routines*/

extern char *loki lib ver;/* String with version no. &

copyright*/

#ifdef STDC/* declare prototypes for library

functions */

extern void enloki(char *b); extern void deloki(char *b); extern void setlokikey(char key[LOKIBLK]);

#else/* else just declare library functions extern

extern void enloki(), deloki(), setlokikey(); #endif STDC

char P[32] = {

31, 23, 15, 7, 30, 22, 14, 6,

29, 21, 13, 5, 28, 20, 12, 4, 27, 19, 11, 3, 26, 18, 10, 2,

25, 17, 9, 1, 24, 16, 8, 0 };



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