Помогите разобраться с реализацией Des

Тема в разделе "Общие вопросы по С и С++", создана пользователем Splendid, 27 мар 2008.

  1. Splendid

    Splendid Гость

    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....
     
  2. Splendid

    Splendid Гость

    Может у кого-нибудь есть реализация DES на СИ??? (мне сказали, что код выше - это СИ++) Не могу найти...поделитесь, пожалуйста...
     
  3. ????

    ???? Гость

  4. Splendid

    Splendid Гость

    ????
    Спасибо!
     
  5. Splendid

    Splendid Гость

    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!!!!
     
  6. European

    Регистрация:
    4 сен 2006
    Сообщения:
    2.580
    Симпатии:
    0
    Подключение этих заголовков должно быть таким:
    Код (Text):
    #include <iostream>
    #include <string>
     
  7. Splendid

    Splendid Гость

    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.
     
  8. Splendid

    Splendid Гость

    Спасибо! С ошибками разобралась.
     
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