C++加密解密

/*********************************************************
 *  des.h
 *  用户使用des算法头文件
 *
 *********************************************************/
#ifndef _OPENDESS_H_
#define _OPENDESS_H_

#ifdef __cplusplus
extern "C" {
#endif

//ab\0defg

//用户使用的函数
int DesEnc(
        unsigned char *pInData,//明文
        int            nInDataLen,
        unsigned char *pOutData,//密文
        int           *pOutDataLen);

//用户使用函数des解密
int DesDec(
       unsigned char *pInData,//密文
       int            nInDataLen,
       unsigned char *pOutData,//明文
       int           *pOutDataLen);

#ifdef __cplusplus
}
#endif

#endif
/******************************************************
 *
 *  des.c
 *  common des......
 *
 ******************************************************/

#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include "des.h"

/*********************************************************
  data type definition for Des;
**********************************************************/
#define EN0    0
#define DE1    1

#define DES_KEYBYTES    128
#define DES_KEYLONGS    32
#define DES_BLOCKLEN    8

typedef struct {
    unsigned char ek[DES_KEYBYTES];
    int    ekLen;
    unsigned char dk[DES_KEYBYTES];
    int    dkLen;
    unsigned char CbcCtx[DES_BLOCKLEN];
} DES_CTX;

typedef struct {
    unsigned char ek1[DES_KEYBYTES];
    int    ek1Len;
    unsigned char dk1[DES_KEYBYTES];
    int    dk1Len;
    unsigned char ek2[DES_KEYBYTES];
    int    ek2Len;
    unsigned char dk2[DES_KEYBYTES];
    int    dk2Len;
    unsigned char CbcCtx[DES_BLOCKLEN];
    //int    IsFirstBlock;
} DES3_CTX;

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 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 };

static unsigned short bytebit[8] = {0200,0100,040,020,010,04,02,01 };
static unsigned char totrot[16] = {1,2,4,6,8,10,12,14,15,17,19,21,23,25,27,28};
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    };

//insert digits
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,0x20000000l,0x42080000l,
       0x42080100l,0x00080100l,0x42000000l,0x42080100l,
       0x02080000l,0x02000100l,0x40000100l,0x00080000l,
       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 };

void deskey(unsigned char *key,short edf, unsigned long *kn);
void cookey(register unsigned long *raw1, unsigned long *dough);
//void cpkey(register unsigned long *into);
//void usekey(register unsigned long *from);
//void des(unsigned char *inblock,unsigned char *outblock);
void scrunch(register unsigned char *outof, register unsigned long *into);
void unscrun(register unsigned long *outof, register unsigned char *into);
void desfunc(register unsigned long *block,register unsigned long *keys);

/*****************  DES Function  *****************/
unsigned long OPENCOMM_DesExpandEncKey(
        unsigned char *pbDesKey,
        unsigned long  ulDesKeyLen,
        unsigned char *pbDesEncKey,
        unsigned long *ulDesEncKeyLen);

unsigned long OPENCOMM_DesExpandDecKey(
        unsigned char *pbDesKey,
        unsigned long  ulDesKeyLen,
        unsigned char *pbDesDecKey,
        unsigned long *ulDesDecKeyLen);

unsigned long OPENCOMM_DesEncRaw(
        unsigned char *pbDesEncKey,
        unsigned long  ulDesEncKeyLen,
        unsigned char *pbInData,
        unsigned long  ulInDataLen,
        unsigned char *pbOutData,
        unsigned long *ulOutDataLen);

unsigned long OPENCOMM_DesDecRaw(
        unsigned char *pbDesDecKey,
        unsigned long  ulDesDecKeyLen,
        unsigned char *pbInData,
        unsigned long  ulInDataLen,
        unsigned char *pbOutData,
        unsigned long *ulOutDataLen);

int myic_DESDecrypt(
        unsigned char *pDesKey,
        int            nDesKeyLen,
        unsigned char *pInData,
        int            nInDataLen,
        unsigned char *pOutData,
        int           *pOutDataLen);

int myic_DESEncrypt(
        unsigned char *pDesKey,
        int            nDesKeyLen,
        unsigned char *pInData,
        int            nInDataLen,
        unsigned char *pOutData,
        int           *pOutDataLen);

void deskey(unsigned char *key,short edf, unsigned long *kn)
{
    register int i, j, l, m, n;
    unsigned long pc1m[56],pcr[56];

    for ( j = 0; j < 56; j++ )
    {
        l = pc1[j];
        m = l & 07;
        pc1m[j] = (((unsigned long) key[l >> 3] & (unsigned long)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];
        }
    }
    return;
}

void cookey(register unsigned long *raw1, unsigned long *dough)
{
    register unsigned long *cook,*raw0;
    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);
    }
    return;
}

void scrunch(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;
}

void unscrun(register unsigned long *outof, register unsigned char *into)
{
    *into++     = (unsigned char)((*outof >> 24) & 0xffL);
    *into++     = (unsigned char)((*outof >> 16) & 0xffL);
    *into++     = (unsigned char)((*outof >>  8) & 0xffL);
    *into++     = (unsigned char)( *outof++      & 0xffL);
    *into++     = (unsigned char)((*outof >> 24) & 0xffL);
    *into++     = (unsigned char)((*outof >> 16) & 0xffL);
    *into++     = (unsigned char)((*outof >>  8) & 0xffL);
    *into     = (unsigned char)( *outof          & 0xffL);
    return;
}

void desfunc(register unsigned long *block,register 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;
    return;
}

/*****************************************************************
    OPENCOMM_DesExpandEncKey    : Expand Des Enc Key 扩展des加密密钥
    Return value:
        0         : Success
        other     : failed
    Parameters:
        pbDesKey        : 扩展前的DES密钥(8字节)       input
        ulDesKeyLen     : 扩展前的DES密钥长度          input
        pbDesEncKey     : 扩展后的DES加密密钥(128字节)  output
        *ulDesEncKeyLen : 扩展后的DES加密密钥长度       output
*****************************************************************/
unsigned long OPENCOMM_DesExpandEncKey(
        unsigned char *pbDesKey,
        unsigned long  ulDesKeyLen,
        unsigned char *pbDesEncKey,
        unsigned long *ulDesEncKeyLen)
{
    unsigned long kn[32], dough[32];

    if (ulDesKeyLen != 8)
        return 0xEE20;

    deskey(pbDesKey, EN0, kn);
    cookey(kn, dough);
    *ulDesEncKeyLen = DES_KEYBYTES;  //32 long = 128 bytes
    memcpy(pbDesEncKey, dough, *ulDesEncKeyLen);

    return 0;
}

/*****************************************************************
    OPENCOMM_DesExpandDecKey    : Expand Des Dec Key 扩展des解密密钥
    Return value:
        0       : Success
        other   : failed
    Parameters:
        pbDesKey        : 扩展前的DES密钥(8字节)      input
        ulDesKeyLen     : 扩展前的DES密钥长度         input
        pbDesDecKey     : 扩展后的DES解密密钥(128字节) output
        *ulDesDecKeyLen : 扩展后的DES解密密钥长度      output
*****************************************************************/
unsigned long OPENCOMM_DesExpandDecKey(
        unsigned char *pbDesKey,
        unsigned long  ulDesKeyLen,
        unsigned char *pbDesDecKey,
        unsigned long *ulDesDecKeyLen)
{
    unsigned long kn[32], dough[32];

    if (ulDesKeyLen != 8)
        return 0xEE20;

    deskey(pbDesKey, DE1, kn);
    cookey(kn, dough);
    *ulDesDecKeyLen = DES_KEYBYTES;  //32 long = 128 bytes
    memcpy(pbDesDecKey, dough, *ulDesDecKeyLen);

    return 0;
}

/****************************************************************
    OPENCOMM_DesEncRaw        : Des算法加密小整块明文8字节
    Return value:
        0       : Success
        other   : failed
    Parameters:
        pbDesEncKey    : DES加密密钥    input
        ulDesEncKeyLen : DES加密密钥长度 input
        pbInData       : 待加密的明文    input
        ulInDataLen    : 待加密的明文长度 input
        pbOutData      : 加密后的密文    output
        *ulOutDataLen  : 加密后的密文长度 output
*****************************************************************/
unsigned long OPENCOMM_DesEncRaw(
        unsigned char *pbDesEncKey,
        unsigned long  ulDesEncKeyLen,
        unsigned char *pbInData,
        unsigned long  ulInDataLen,
        unsigned char *pbOutData,
        unsigned long *ulOutDataLen)
{
    unsigned long work[2], ek[DES_KEYLONGS];
    unsigned char cp[DES_BLOCKLEN];

    if (ulInDataLen != DES_BLOCKLEN)
        return 0xEE20;

    if (ulDesEncKeyLen != DES_KEYBYTES)
        return 0xEE20;

    memcpy(cp, pbInData, DES_BLOCKLEN);
    scrunch(cp,work);  // 8 bytes -> 2 long
    memcpy(ek, pbDesEncKey, ulDesEncKeyLen);
    desfunc(work,ek);
    unscrun(work,cp); // 2 long -> 8 bytes
    memcpy(pbOutData, cp, DES_BLOCKLEN);
    *ulOutDataLen = DES_BLOCKLEN;

    return 0;
}

/*****************************************************************
    OPENCOMM_DesDecRaw : Des算法解密小整块密文8字节
    Return value:
        0     : Success
        other : failed
    Parameters:
        pbDesDecKey    : DES解密密钥     input
        ulDesDecKeyLen : DES解密密钥长度  input
        pbInData       : 待解密的密文     input
        ulInDataLen    : 待解密的密文长度  input
        pbOutData      : 解密后的明文     output
        *ulOutDataLen  : 解密后的明文长度  output
*****************************************************************/
unsigned long OPENCOMM_DesDecRaw(
        unsigned char *pbDesDecKey,
        unsigned long  ulDesDecKeyLen,
        unsigned char *pbInData,
        unsigned long  ulInDataLen,
        unsigned char *pbOutData,
        unsigned long *ulOutDataLen)
{
    unsigned long work[2], dk[DES_KEYLONGS];
    unsigned char cp[DES_BLOCKLEN];

    if (ulInDataLen != DES_BLOCKLEN)
        return 0xEE20;

    if (ulDesDecKeyLen != DES_KEYBYTES)
        return 0xEE20;

    memcpy(cp, pbInData, DES_BLOCKLEN);
    scrunch(cp,work);  // 8 bytes -> 2 long
    memcpy(dk, pbDesDecKey, ulDesDecKeyLen);
    desfunc(work,dk);
    unscrun(work,cp); // 2 long -> 8 bytes
    memcpy(pbOutData, cp, DES_BLOCKLEN);
//    des_enc(pbDesEncKey, pbInData, pbOutData);
    *ulOutDataLen = DES_BLOCKLEN;

    return 0;
}

/*********************   DES    *********************/

int myic_DESEncrypt(
        unsigned char *pDesKey,
        int            nDesKeyLen,
        unsigned char *pInData,
        int            nInDataLen,
        unsigned char *pOutData,
        int           *pOutDataLen)
{
    unsigned char DesKeyBuf[32];
    unsigned char DesEncKeyBuf[128];
    int EncKeyLen, KeyLen = 0;
    int retval = 0, loops, i;

    if(nInDataLen%8 != 0)
        return 0xEE20;

    if(nDesKeyLen != 8)
        return 0xEE20;
    KeyLen = nDesKeyLen;
    memcpy(DesKeyBuf, pDesKey, nDesKeyLen);

    retval = OPENCOMM_DesExpandEncKey(DesKeyBuf, KeyLen,
        DesEncKeyBuf, (unsigned long *)&EncKeyLen);
    if(retval != 0)
        return retval;

    loops = nInDataLen/8;
    for(i = 0; i < loops; i++)
    {
        retval = OPENCOMM_DesEncRaw(DesEncKeyBuf, EncKeyLen, pInData + i*8,
            8, pOutData + i*8, (unsigned long *)pOutDataLen);
        if(retval != 0)
            return retval;
    }
    *pOutDataLen = nInDataLen;
    return retval;
}

int myic_DESDecrypt(
        unsigned char *pDesKey,
        int            nDesKeyLen,
        unsigned char *pInData,
        int            nInDataLen,
        unsigned char *pOutData,
        int           *pOutDataLen)
{
    unsigned char DesKeyBuf[32];
    unsigned char DesDecKeyBuf[128];
    int DecKeyLen, KeyLen = 0;
    int retval = 0, loops, i;

    if(nInDataLen%8 != 0)
        return 0xEE20;

    if(nDesKeyLen != 8)
        return 0xEE20;
    KeyLen = nDesKeyLen;
    memcpy(DesKeyBuf, pDesKey, nDesKeyLen);

    retval = OPENCOMM_DesExpandDecKey(DesKeyBuf, KeyLen,
        DesDecKeyBuf, (unsigned long *)&DecKeyLen);
    if(retval != 0)
        return retval;

    loops = nInDataLen/8;
    for(i = 0; i < loops; i++)
    {
        retval = OPENCOMM_DesDecRaw(DesDecKeyBuf, DecKeyLen, pInData + i*8,
            8, pOutData + i*8, (unsigned long *)pOutDataLen);
        if(retval != 0)
            return retval;
    }
    *pOutDataLen = nInDataLen;
    return retval;
}

//对称明文数据打pading
void  CW_dataPadAdd(int tag, unsigned char *date, unsigned int dateLen,
                    unsigned char **padDate, unsigned int *padDateLen)
{
    int           i, padLen;
    unsigned char *pTmp   = NULL;

    pTmp = (unsigned char *)malloc(dateLen+24);
    if (pTmp == NULL)
    {
        *padDate = NULL;
        return ;
    }
    memset(pTmp, 0, dateLen+24);
    memcpy(pTmp, date, dateLen);

    if (tag == 0)
    {
        padLen = 8 - dateLen % 8;
        for (i=0; i<padLen; i++)
        {
            pTmp[dateLen+i] = (char)padLen;
        }
        *padDateLen = dateLen + padLen;
    }
    else
    {
        padLen = 16 - dateLen % 16;
        for (i=0; i<padLen; i++)
        {
            pTmp[dateLen+i] = (char)padLen;
        }
    }

    *padDateLen = dateLen + padLen;
    *padDate = pTmp;
}

#define  USER_PASSWORD_KEY "abcd1234"

//数据加密
int DesEnc(
         unsigned char *pInData,
         int            nInDataLen,
         unsigned char *pOutData,
         int           *pOutDataLen)
{
    int                rv;
    unsigned char    *padDate = NULL;
    unsigned int    padDateLen = 0;

    CW_dataPadAdd(0, pInData, (unsigned int )nInDataLen, &padDate, &padDateLen);

    rv = myic_DESEncrypt((unsigned char *)USER_PASSWORD_KEY, strlen(USER_PASSWORD_KEY),
        padDate, (int)padDateLen, pOutData, pOutDataLen);
    if (rv != 0)
    {
        if (padDate != NULL)
        {
            free(padDate);
        }
        return rv;
    }

    if (padDate != NULL)
    {
        free(padDate);
    }
    return 0;
}

//数据加密
int DesEnc_raw(
    unsigned char *pInData,
    int            nInDataLen,
    unsigned char *pOutData,
    int           *pOutDataLen)
{
    int                rv;
    unsigned char    *padDate = NULL;
    unsigned int    padDateLen = 0;

    rv = myic_DESEncrypt((unsigned char *)USER_PASSWORD_KEY, strlen(USER_PASSWORD_KEY),
        pInData, (int)nInDataLen, pOutData, pOutDataLen);
    if (rv != 0)
    {
        return rv;
    }
    return 0;
}

//解密分配内存错误
#define  ERR_MALLOC 20
//密码长度不是8的整数倍, 不合法
#define  ERR_FILECONT 20

//用户使用函数des解密
int DesDec(
           unsigned char *pInData,
           int            nInDataLen,
           unsigned char *pOutData,
           int           *pOutDataLen)
{
    int                rv;
    char            padChar;
    unsigned char     *tmpPlain = NULL;

    tmpPlain =        (unsigned char *)malloc(nInDataLen+24);
    if (tmpPlain == NULL)
    {
        return ERR_MALLOC;
    }
    memset(tmpPlain, 0, nInDataLen+24);

    //解密
    rv = myic_DESDecrypt((unsigned char *)USER_PASSWORD_KEY, strlen(USER_PASSWORD_KEY),
        pInData, nInDataLen, tmpPlain, pOutDataLen);
    if (rv != 0)
    {
        if (tmpPlain != NULL) free(tmpPlain);
        return rv;
    }

    //去pading
    padChar = tmpPlain[*pOutDataLen - 1];
    if ( (int)padChar<=0 || (int)padChar>8) //异常处理
    {
        if (tmpPlain) free(tmpPlain);
        return ERR_FILECONT;
    }

    *pOutDataLen = *pOutDataLen - (int)padChar;
    //memset(tmpPlain + *pOutDataLen, 0, (int)padChar);
    memcpy(pOutData, tmpPlain, *pOutDataLen);
    if (tmpPlain) free(tmpPlain);
    return 0;
}

//用户使用函数des解密
int DesDec_raw(
    unsigned char *pInData,
    int            nInDataLen,
    unsigned char *pOutData,
    int           *pOutDataLen)
{
    int                rv;
    //char            padChar;
    //unsigned char     *tmpPlain = NULL;

    /*
    tmpPlain =        (unsigned char *)malloc(nInDataLen+24);
    if (tmpPlain == NULL)
    {
        return ERR_MALLOC;
    }
    memset(tmpPlain, 0, nInDataLen+24);
    */

    //解密
    rv = myic_DESDecrypt((unsigned char *)USER_PASSWORD_KEY, strlen(USER_PASSWORD_KEY),
        pInData, nInDataLen, pOutData, pOutDataLen);
    if (rv != 0)
    {
        //if (tmpPlain != NULL) free(tmpPlain);
        return rv;
    }
    /*
    //去pading
    padChar = tmpPlain[*pOutDataLen - 1];
    if ( (int)padChar<=0 || (int)padChar>8) //异常处理
    {
        if (tmpPlain) free(tmpPlain);
        return ERR_FILECONT;
    }

    *pOutDataLen = *pOutDataLen - (int)padChar;
    //memset(tmpPlain + *pOutDataLen, 0, (int)padChar);
    memcpy(pOutData, tmpPlain, *pOutDataLen);
    if (tmpPlain) free(tmpPlain);
    */
    return 0;
}
#define  _CRT_SECURE_NO_WARNINGS
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include "des.h"

int main11()
{
    int        ret = 0;
    char *plain = "1232343444";//明文
    int plainlen = strlen(plain);

    char plain2[4096] = {0};//明文
    int plainlen2 = 0;

    unsigned char cryptbuf[4096] = {0};//密文
    int cryptlen = 0;
    //用户使用的函数
    ret =  DesEnc(plain, plainlen, cryptbuf, &cryptlen);
    if (ret != 0)
    {
        printf("func DesEnc() err:%d \n");
        return ret;
    }

    //用户使用函数des解密
    ret =   DesDec(cryptbuf, cryptlen,  plain2, &plainlen2);
    if (ret != 0)
    {
        printf("func DesDec() err:%d \n");
        return ret;
    }

    if (plainlen != plainlen2)
    {
        ret = -2;
        printf("明文长度和解密后的明文长度 不一样 \n");
        return ret;
    }

    if (memcmp(plain2, plain, plainlen) == 0 )
    {
        printf("明文长度和解密后的明文长度 一样 ok \n");
    }
    else
    {
        printf("明文长度和解密后的明文长度 不一样 err \n");
    }

    system("pause");
    return ret ;
}
#define  _CRT_SECURE_NO_WARNINGS
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include "des.h"

int FileSymEnc(const char *pfile1, const char *pfile2)//pfile1输入文件，
{
    int        ret = 0;
    FILE *fp1= NULL, *fp2 = NULL;
    unsigned char plain[4096];
    int plainlen = 0;

    unsigned char cryptbuf[4096] = {0};
    int cryptlen = 0;

    int tmplen;

    fp1 = fopen(pfile1, "rb");//读的方式打开文件
    if (fp1 == NULL)
    {
        goto END;
    }

    fp2 = fopen(pfile2, "wb");//写的方式打开文件
    if (fp2 == NULL)
    {
        goto END;
    }

    while (!feof(fp1))//每次读取4k
    {
        plainlen = fread(plain, 1, 4096, fp1);//每次读取4k
        if (feof(fp1))  //读完数据以后，判断是否文件结束
        {
            break;//文件不足以4k,则跳出
        }

        //加密==4k的数据
        ret =  DesDec_raw(plain, plainlen, cryptbuf, &cryptlen);
        if (ret != 0)
        {
            printf("func DesEnc() err:%d \n", ret);
            goto END;
        }

        tmplen = fwrite(cryptbuf, 1, cryptlen, fp2);
        if (tmplen != cryptlen)//明文和密文的长度是一样的
        {
            ret  = -3;
            printf("写密文文件失败，请检查是否磁盘已满\n");
            goto END;
        }

        //if (plainlen == 4096)
    }

    //加密小于4k的数据
    ret =  DesEnc(plain, plainlen, cryptbuf, &cryptlen);
    if (ret != 0)
    {
        printf("func DesEnc() err:%d \n", ret);
        goto END;
    }

    tmplen = fwrite(cryptbuf, 1, cryptlen, fp2);
    if (cryptlen != tmplen)//磁盘已满
    {
        ret  = -3;
        printf("写小于4k文件密文失败，请检查是否磁盘已满\n");
        goto END;
    }

END:
    if (fp1 != NULL)
    {
        fclose(fp1);
    }
    if (fp2 != NULL)
    {
        fclose(fp2);
    }
    return 0;
}

void main()
{
    int        ret = 0;
    const char *file1 = "c:/socketclient.dll";
    const char *file2 = "c:/socketclientend.dll";

    //const char *file1 = "c:/22.txt";
    //const char *file2 = "c:/22enc.txt";

    ret =  FileSymEnc(file1, file2);
    if (ret != 0)
    {
        printf("func FileSymEnc() err\n " );
        return ;
    }

    system("pause");
    return ;
}
时间： 2024-10-18 14:41:23

C++加密解密的相关文章

AJAX+REA实现前后台数据交互的加密解密

AJAX+REA实现前后台数据交互的加密解密 1.创建js文件Encryption.js /**  * 加密解密  */ /** RSA加密用 生成key */ function bodyRSA(){ /** 1024位的key参数写130,2014位的key参数写260 */ setMaxDigits(130); /** ajax 调用后台方法,取回公钥 */ var keyR ;     $.ajax({      url: "/GHGL/Key/pk",//请求后台的url,本例

加密解密过程

1,首先来说说有关加密解密有关的信息 信息安全标准NIST(National Institute of Standards and Technology)美国国家标准与技术研究院 openssl有CIA C:保密性: 数据保密性 隐私性 A:完整性: 数据完整性 系统完整性 I:可用性 真实性:一个实体是真实的,可被验证的. 可追溯性:一旦被攻击,能够追溯攻击源在哪 2,OSI规定的X.800 1)安全攻击: 被动攻击:窃听 主动攻击:1,伪装 2,重播 3,消息修改 4,拒绝攻击等 2)安全服

加密解密

在现代密码学中,加密方法大致可分为对称密钥加密(对称加密)和公开密钥加密(非对称加密). 一. 对称加密(Symmetric-key algorithm,或对等加密: Reciprocal cipher ) 对称加密,即加密和解密使用同一个密钥,或者知道一方密钥能够轻易计算出另一方密钥.其解密(decryption)算法等同于加密算法,也就是说,要还原对等加密的密文,套用加密同样的算法即可得到明文. 对称加密的速度比非对称加密快很多,在很多场合都需要对称加密. 对称加密又可分为分组密码(分组加密

C/C++使用openssl进行摘要和加密解密（md5, sha256, des, rsa）

openssl里面有很多用于摘要哈希.加密解密的算法,方便集成于工程项目,被广泛应用于网络报文中的安全传输和认证.下面以md5,sha256,des,rsa几个典型的api简单使用作为例子. 算法介绍 md5:https://en.wikipedia.org/wiki/MD5 sha256:https://en.wikipedia.org/wiki/SHA-2 des: https://en.wikipedia.org/wiki/Data_Encryption_Standard rsa: htt

c#中base64加密解密

using System; using System.Text; namespace Common { /// <summary> /// 实现Base64加密解密 /// </summary> public sealed class Base64 { /// <summary> /// Base64加密 /// </summary> /// <param name="codeName">加密采用的编码方式</param

C#DES加密解密字符串

1.添加引用 using System.Security.Cryptography; using System.IO; 2.添加默认密匙向量 //默认密钥向量 private static byte[] Keys = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF }; 3.添加加密解密类 /// <summary> /// DES加密字符串 /// </summary> /// <param name="encry

Discuz论坛写出的php加密解密处理类(代码+使用方法)

PHP加密解密也是常有的事,最近在弄相关的东西,发现discuz论坛里的PHP加密解密处理类代码,感觉挺不错,在用的时候,要参考Discuz论坛的passport相关函数,后面我会附上使用方法,先把类代码帖上来: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 <?php /*

C#加密解密(DES,AES,Base64,md5,SHA256,RSA,RC4)

一:异或^简单加解密(数字类型) 1:原理: 异或用于比较两个二进制数的相应位,在执行按位"异或"运算时,如果两个二进制数的相应位都为1或者都为0,则返回0;如果两个二进制数的相应位其中一个为1另一个为0,则返回1. //对数字加密 int P_int_Num, P_int_Key;//定义两个值类型变量 string Encryptstr = (P_int_Num ^ P_int_Key).ToString();//加密数值 //对数字解密 int P_int_Key, P_int_

非对称技术栈实现AES加密解密

非对称技术栈实现AES加密解密 正如前面的一篇文章所述,https协议的SSL层是实现在传输层之上,应用层之下,也就是说在应用层上看到的请求还是明码的,对于某些场景下要求这些http请求参数是非可读的,这就要求在前端和后端不同的技术栈上完成信息的加密解密.当然我们通常完成这样专业的功能都会考虑使用相应的框架或者程序库来完成功能,前端或者NodeJS平台通常是JavaScript语言,JavaScript主流的加密解密库分别是SjclJS和CryptoJS, 本文以CryptoJS为例进行讨论.另

非对称加密解密与签名验签的关系

首先看一下各自的定义: 加密:发送方利用接收方的公钥对要发送的明文进行加密. 解密:接受方利用自己的私钥进行解密. 签名:发送方用一个哈希函数从报文文本中生成报文摘要,然后用自己的私人密钥对这个摘要进行加密,得到的就是这个报文对应的数字签名.通常来说,发送方会把数字签名和报文原文一并发送给接受者. 验签:接收方得到原始报文和数字签名后,用同一个哈希函数从报文中生成摘要A,另外,用发送方提供的公钥对数字签名进行解密,得到摘要B,对比A和B是否相同,就可以得知报文有没有被篡改过. 两者的目的不同,加