Помогите разобраться с реализацией Des

  • Автор темы Splendid
  • Дата начала
S

Splendid

#1
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!


[codebox]#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);
}[/codebox]
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....
 
S

Splendid

#2
Может у кого-нибудь есть реализация DES на СИ??? (мне сказали, что код выше - это СИ++) Не могу найти...поделитесь, пожалуйста...
 
S

Splendid

#5
написала в итоге эти заголовки так:

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

выдает ошибки:

[codebox]
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)[/codebox]
[codebox]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}[/codebox]
Что с этим делать?
Помогите исправить, пожалуйста!!!!
 
S

Splendid

#7
если так написать, то выдает

Compiling...
DESASM.C
f:\program files\microsoft visual studio\vc98\include\eh.h(32) : fatal error C1189: #error : "eh.h is only for C++!"
Error executing cl.exe.