DES加密问题,急~~~~,解决马上给份

文件: ksdes.h
描述: 用于进行3DES和DES运算的类封装
变量单线程操作的是安全的.
时间: 2007-03-20
==============================================================================
*/
#ifndef _KS_DES_H
#define _KS_DES_H// define kstd
#define _KSSTD ksstd::
#define _KSSTD_BEGIN namespace ksstd {
#define _KSSTD_END };
#define _KSSTD_USING using namespace ksstd;typedef unsigned char u_char;// ksstd begine
_KSSTD_BEGIN/*
* Initial permutation,
*/
static const u_char IP[] = {
58,50,42,34,26,18,10, 2,
60,52,44,36,28,20,12, 4,
62,54,46,38,30,22,14, 6,
64,56,48,40,32,24,16, 8,
57,49,41,33,25,17, 9, 1,
59,51,43,35,27,19,11, 3,
61,53,45,37,29,21,13, 5,
63,55,47,39,31,23,15, 7,
};/*
* Final permutation, FP = IP^(-1)
*/
static const u_char FP[] = {
40, 8,48,16,56,24,64,32,
39, 7,47,15,55,23,63,31,
38, 6,46,14,54,22,62,30,
37, 5,45,13,53,21,61,29,
36, 4,44,12,52,20,60,28,
35, 3,43,11,51,19,59,27,
34, 2,42,10,50,18,58,26,
33, 1,41, 9,49,17,57,25,
};/*
* Permuted-choice 1 from the key bits
* to yield C and D.
* Note that bits 8,16... are left out:
* They are intended for a parity check.
*/
static const u_char PC1_C[] = {
57,49,41,33,25,17, 9,
1,58,50,42,34,26,18,
10, 2,59,51,43,35,27,
19,11, 3,60,52,44,36,
};static const u_char PC1_D[] = {
63,55,47,39,31,23,15,
7,62,54,46,38,30,22,
14, 6,61,53,45,37,29,
21,13, 5,28,20,12, 4,
};/*
* Sequence of shifts used for the key schedule.
*/
static const u_char shifts[] = {
1,1,2,2,2,2,2,2,1,2,2,2,2,2,2,1,
};/*
* Permuted-choice 2, to pick out the bits from
* the CD array that generate the key schedule.
*/
static const u_char PC2_C[] = {
14,17,11,24, 1, 5,
3,28,15, 6,21,10,
23,19,12, 4,26, 8,
16, 7,27,20,13, 2,
};static const u_char PC2_D[] = {
41,52,31,37,47,55,
30,40,51,45,33,48,
44,49,39,56,34,53,
46,42,50,36,29,32,
};static const u_char e[] = {
32, 1, 2, 3, 4, 5,
4, 5, 6, 7, 8, 9,
8, 9,10,11,12,13,
12,13,14,15,16,17,
16,17,18,19,20,21,
20,21,22,23,24,25,
24,25,26,27,28,29,
28,29,30,31,32, 1,
};/*
* The 8 selection functions.
* For some reason, they give a 0-origin
* index, unlike everything else.
*/
static const u_char S[8][64] = {
14, 4,13, 1, 2,15,11, 8, 3,10, 6,12, 5, 9, 0, 7,
0,15, 7, 4,14, 2,13, 1,10, 6,12,11, 9, 5, 3, 8,
4, 1,14, 8,13, 6, 2,11,15,12, 9, 7, 3,10, 5, 0,
15,12, 8, 2, 4, 9, 1, 7, 5,11, 3,14,10, 0, 6,13, 15, 1, 8,14, 6,11, 3, 4, 9, 7, 2,13,12, 0, 5,10,
3,13, 4, 7,15, 2, 8,14,12, 0, 1,10, 6, 9,11, 5,
0,14, 7,11,10, 4,13, 1, 5, 8,12, 6, 9, 3, 2,15,
13, 8,10, 1, 3,15, 4, 2,11, 6, 7,12, 0, 5,14, 9, 10, 0, 9,14, 6, 3,15, 5, 1,13,12, 7,11, 4, 2, 8,
13, 7, 0, 9, 3, 4, 6,10, 2, 8, 5,14,12,11,15, 1,
13, 6, 4, 9, 8,15, 3, 0,11, 1, 2,12, 5,10,14, 7,
1,10,13, 0, 6, 9, 8, 7, 4,15,14, 3,11, 5, 2,12, 7,13,14, 3, 0, 6, 9,10, 1, 2, 8, 5,11,12, 4,15,
13, 8,11, 5, 6,15, 0, 3, 4, 7, 2,12, 1,10,14, 9,
10, 6, 9, 0,12,11, 7,13,15, 1, 3,14, 5, 2, 8, 4,
3,15, 0, 6,10, 1,13, 8, 9, 4, 5,11,12, 7, 2,14, 2,12, 4, 1, 7,10,11, 6, 8, 5, 3,15,13, 0,14, 9,
14,11, 2,12, 4, 7,13, 1, 5, 0,15,10, 3, 9, 8, 6,
4, 2, 1,11,10,13, 7, 8,15, 9,12, 5, 6, 3, 0,14,
11, 8,12, 7, 1,14, 2,13, 6,15, 0, 9,10, 4, 5, 3, 12, 1,10,15, 9, 2, 6, 8, 0,13, 3, 4,14, 7, 5,11,
10,15, 4, 2, 7,12, 9, 5, 6, 1,13,14, 0,11, 3, 8,
9,14,15, 5, 2, 8,12, 3, 7, 0, 4,10, 1,13,11, 6,
4, 3, 2,12, 9, 5,15,10,11,14, 1, 7, 6, 0, 8,13, 4,11, 2,14,15, 0, 8,13, 3,12, 9, 7, 5,10, 6, 1,
13, 0,11, 7, 4, 9, 1,10,14, 3, 5,12, 2,15, 8, 6,
1, 4,11,13,12, 3, 7,14,10,15, 6, 8, 0, 5, 9, 2,
6,11,13, 8, 1, 4,10, 7, 9, 5, 0,15,14, 2, 3,12, 13, 2, 8, 4, 6,15,11, 1,10, 9, 3,14, 5, 0,12, 7,
1,15,13, 8,10, 3, 7, 4,12, 5, 6,11, 0,14, 9, 2,
7,11, 4, 1, 9,12,14, 2, 0, 6,10,13,15, 3, 5, 8,
2, 1,14, 7, 4,10, 8,13,15,12, 9, 0, 3, 5, 6,11,
};/*
* P is a permutation on the selected combination
* of the current L and key.
*/
static const u_char P[] = {
16, 7,20,21,
29,12,28,17,
1,15,23,26,
5,18,31,10,
2, 8,24,14,
32,27, 3, 9,
19,13,30, 6,
22,11, 4,25,
};

// ========================================================/**
功能: 3DES标准算法封装
2007-3-19 by wangyun
*/
class ksdes
{
public:
ksdes(); /**
功能: DES运行-加密
参数:
@data_s: 输入明文信息
@data_e: 输入密文信息
*/
void des(u_char * data_s,int len,u_char * data_e);
void des_block(u_char * data_s,u_char * workkey,u_char * data_e); /**
功能: DES运行-解密
参数:
@data_s: 输入明文信息
@data_e: 输入密文信息
*/
void undes(u_char * data_e,int len, u_char * data_s);
void undes_block(u_char * data_e,u_char * workkey, u_char * data_s); /**
功能: 3DES运行-加密
参数:
@data_s: 输入明文信息
@data_e: 输入密文信息
*/
void tri_des(u_char * data_s,int len,u_char * data_e);
void tri_des_block(u_char * data_s,u_char * workkey,u_char * data_e); /**
功能: 3DES运行-解密
参数:
@data_s: 输入明文信息
@data_e: 输入密文信息
*/
void tri_undes(u_char * data_e,int len, u_char * data_s);
void tri_undes_block(u_char * data_e,u_char * workkey,u_char * data_s);
/**
功能: 分散工作密钥
@index: 密钥索引
@param: 分散因子(8字节 64bit)
*/
void diversifykey(u_char * param); /**
功能: 设置主密钥
*/
void setMasterKey(u_char * key,int len);
void setMasterKeyHex(u_char * key,int len);
void reSetTempKey(); /**
功能: 获取数据Mac
*/
void getDataMac(u_char * data,int len,u_char * mac);public:
/**
描述: 将base的每一位与param进行与或运算
参数:
@[in and out]base
@[in        ]param
*/
static void Xor(u_char *base,u_char *param); /**
描述: 将BCD码转化为Asc码
*/
static void bcdToAsc(u_char *inBcd,int len, u_char* outAsc); /**
描述: 将ASC码转化为BCD码
*/
static void ascToBcd(u_char *inAsc,int len, u_char* outBcd);public:
/**
描述: 用于打印相关密钥信息
*/
void printinfo();private:
u_char masterkey[17];
u_char tempkey[17];private:
/*
* The C and D arrays used to calculate the key schedule.
*/
u_char C[64];
u_char D[64];

/*
* The key schedule.
* Generated from the key.
*/
u_char KS[16][48];

/*
* The E bit-selection table.
*/
u_char E[64]; /**
功能: 设置主密钥
@key:密钥
*/
void setkey(u_char *key)
{
register i, j, k;
int t;

/*
* First, generate C and D by permuting
* the key.  The low order bit of each
* 8-bit unsigned char is not used, so C and D are only 28
* bits apiece.
*/
for (i=0; i<28; i++) {
C[i] = key[PC1_C[i]-1];
D[i] = key[PC1_D[i]-1];
}

/*
* To generate Ki, rotate C and D according
* to schedule and pick up a permutation
* using PC2.
*/
for (i=0; i<16; i++) {
/*
* rotate.
*/
for (k=0; k<shifts[i]; k++) {
t = C[0];
for (j=0; j<28-1; j++)
{
C[j] = C[j+1];
}
C[27] = t;
t = D[0];
for (j=0; j<28-1; j++)
{
D[j] = D[j+1];
}
D[27] = t;
}
/*
* get Ki. Note C and D are concatenated.
*/
for (j=0; j<24; j++) {
KS[i][j] = C[PC2_C[j]-1];
KS[i][j+24] = D[PC2_D[j]-28-1];
}
} for(i=0;i<48;i++)
{
E[i] = e[i];
} } //  end if /*
* The current block, divided into 2 halves.
*/
u_char L[64], R[64];
u_char tempL[64];
u_char f[64]; /*
* The combination of the key and the input, before selection.
*/
u_char preS[64]; /*
* The payoff: encrypt a block.
* @edflag: ENCRYPT 0 加密
* DESCRYPT 1 解密
*/
void encrypt(u_char *block, int edflag)
{
    int i, ii;
    register t, j, k;     /*
     * First, permute the bits in the input
     */
    for (j=0; j<64; j++)
L[j] = block[IP[j]-1]; /*============================================== */
    for (j=0;j<32;j++)
R[j] = L[j+32];
/*============================================== */ /*
* Perform an encryption operation 16 times.
*/
   for (ii=0; ii<16; ii++) {
    /*
    * Set direction
    */
if (edflag)
    i = 15-ii;
else
    i = ii;
/*
* Save the R array,
* which will be the new L.
*/
for (j=0; j<32; j++)
    tempL[j] = R[j];

/*
* Expand R to 48 bits using the E selector;
* exclusive-or with the current key bits.
*/
for (j=0; j<48; j++)
    preS[j] = R[E[j]-1] ^ KS[i][j]; /*
* The pre-select bits are now considered
* in 8 groups of 6 bits each.
* The 8 selection functions map these
* 6-bit quantities into 4-bit quantities
* and the results permuted
* to make an f(R, K).
* The indexing into the selection functions
* is peculiar; it could be simplified by
* rewriting the tables.
*/
for (j=0; j<8; j++) {
    t = 6*j;
    k = S[j][(preS[t+0]<<5)+
    (preS[t+1]<<3)+
    (preS[t+2]<<2)+
    (preS[t+3]<<1)+
    (preS[t+4]<<0)+
(preS[t+5]<<4)];
t = 4*j;
f[t+0] = (k>>3)&01;
f[t+1] = (k>>2)&01;
f[t+2] = (k>>1)&01;
f[t+3] = (k>>0)&01;
} /*
* The new R is L ^ f(R, K).
* The f here has to be permuted first, though.
*/
for (j=0; j<32; j++)
    R[j] = L[j] ^ f[P[j]-1];
/*
* Finally, the new L (the original R)
* is copied back.
*/
for (j=0; j<32; j++)
    L[j] = tempL[j];     }
    /*
    * The output L and R are reversed.
    */
    for (j=0; j<32; j++) {
t = L[j];
L[j] = R[j];
R[j] = t;
    }
/*============================================== */
    for (j=32;j<64;j++)
L[j] = R[j-32];
/*============================================== */

/*
* The final output
    * gets the inverse permutation of the very original.
    */
    for (j=0; j<64; j++)
block[j] = L[FP[j]-1]; } //  end tools_encrypt static void compress(unsigned char *in,unsigned char *out)
{
    int temp;
    int i,j;     for(i=0;i<8;i++){
out[i] = 0;
temp = 1;
for (j=7;j>=0;j--){
out[i] = out[i] + ( in[i*8+j] * temp);
    temp *= 2;
}
    }
} // end compress /*
* expand takes the eight character string in
* and converts it to a 64 character array containing
* zero or one (bit stream).
*/
static void expand(unsigned char *in,unsigned char *out)
{
    int i,j;     for (i=0;i<8;i++){
for (j=0;j<8;j++){
    *out = (in[i] <<j) & 0x80;
    if (*out == 0x80)
*out = 0x01;
    out++;
}
    }
} // end expand};// ksstd end
_KSSTD_END#endif

/**
文件: ksdes.h
描述: 用于进行3DES和DES运算的类封装
变量单线程操作的是安全的.
时间: 2007-03-20
==============================================================================
*/
#include <memory.h>
#include <stdio.h>
#include <iostream>
#include "ksdes.h"_KSSTD_USING#define ENCRYPT 0
#define DESCRYPT 1
#define BLOCK_LENGTH 9ksdes::ksdes()
{
}/**
功能: 使用主密钥对数据进行Des运算
参数:
@[in ]data_s: 明文信息
@[in ]len:    明文的长度
@[int]data_e: 密文信息
*/
void ksdes::des(u_char * data_s,int len,u_char * data_e)
{
    int i = 0;
    u_char *ip = data_s;
    u_char *op = data_e;    for (i=0;i<len/8;i++)
    {
        des_block(ip,masterkey,op);
        ip+=8;
        op+=8;
    }
}/**
功能: 使用密钥对块数据进行DES加密
参数:
@data_s:  明文信息
@workkey: 临时密钥信息
@data_e:  密文信息
*/
void ksdes::des_block(u_char * data_s,u_char * workkey,u_char * data_e)
{
    int i;
    unsigned char clear_txt[BLOCK_LENGTH],cipher_txt[BLOCK_LENGTH];
    unsigned char key_block[BLOCK_LENGTH];
    unsigned char bits[64];    for(i=0;i<8;i++)
key_block[i]=workkey[i];    for (i=0;i<8;i++)
clear_txt[i] = data_s[i];    expand(key_block,bits);
    setkey(bits);
    expand(clear_txt,bits); /* expand to bit stream */
    encrypt(bits,ENCRYPT); /* encrypt */
    compress(bits,cipher_txt); /* compress to 8 characters */    memcpy(data_e ,cipher_txt,8);
}/**
功能: 使用指定密钥对数据块进行Des解密运算
参数:
@[in ]data_e: 密文信息
@[in ]len:    密文的长度
@[int]data_s: 明文信息
*/
void ksdes::undes_block(u_char * data_e,u_char * workkey, u_char * data_s)
{
    int i;
    unsigned char clear_txt[BLOCK_LENGTH];
    unsigned char pin_block[BLOCK_LENGTH];
    unsigned char key_block[BLOCK_LENGTH];
    unsigned char bits[64];    for(i=0;i<8;i++)
{
key_block[i]=workkey[i];
}    /* get  pan_block */
    expand(key_block,bits);
    setkey(bits);    /* set key */
    expand(data_e,bits); /* expand to bit stream */
    encrypt(bits,DESCRYPT); /* descrypt */
    compress(bits,clear_txt); /* compress to 8 characters */    for (i=0;i<8;i++)
{
pin_block[i] = clear_txt[i];
}    memcpy(data_s ,pin_block, 8);
}/**
功能: 对数据进行Des解密运算
参数:
@[in ]data_e: 密文信息
@[in ]len:    明文的长度
@[int]data_s: 明文信息
*/
void ksdes::undes(u_char * data_e,int len, u_char * data_s)
{
    int i = 0;
    u_char *ip = data_e;
    u_char *op = data_s;    for (i=0;i<len/8;i++)
    {
        undes_block(ip,masterkey,op);
        ip+=8;
        op+=8;
    }
}/**
功能: 解密
参数:
@[in ]data_e: 密文信息
@[in ]len:    密文的长度
@[int]data_s: 明文信息
*/
void ksdes::tri_undes(u_char * data_e,int len, u_char * data_s)
{
int i = 0;
    u_char *ip = data_e;
    u_char *op = data_s;    for (i=0;i<len/8;i++)
    {
        tri_undes_block(ip,tempkey,op);
        ip+=8;
        op+=8;
    }
}/**
功能: 使用零时密钥对快数据进行3DES解密
参数:
@data_e: 密文信息
@data_s: 明文信息
关联:
@tempkey: 临时密钥信息
*/
void ksdes::tri_undes_block(u_char * data_e,u_char * workkey,u_char * data_s)
{
    u_char left_key[9];
    u_char right_key[9];
    u_char tmpstr1[9], tmpstr2[9];

memset(left_key,0,sizeof(left_key));
memset(right_key,0,sizeof(right_key));
memset(tmpstr1,0,sizeof(tmpstr1));
memset(tmpstr2,0,sizeof(tmpstr2));    memcpy(left_key, workkey, 8 );
    memcpy(right_key,workkey+8, 8 );    undes_block(data_e, left_key, tmpstr1 );
    des_block(tmpstr1, right_key, tmpstr2 );
    undes_block(tmpstr2, left_key, data_s );
}/**
功能: 3DES加密信息
参数:
@[in ]data_e: 明文信息
@[in ]len:    明文的长度
@[int]data_s: 密文信息
*/
void ksdes::tri_des(u_char * data_s,int len,u_char * data_e)
{
// u_char temp[17];

int i = 0;
    u_char *ip = data_s;
    u_char *op = data_e;    for (i=0;i<len/8;i++)
    {
        tri_des_block(ip,tempkey,op); /*
memset(temp,0,sizeof(temp));
bcdToAsc(ip,8,temp);
cout<<"ip:"<<temp<<endl; memset(temp,0,sizeof(temp));
bcdToAsc(op,8,temp);
cout<<"op:"<<temp<<endl;
*/        ip+=8;
        op+=8;
    }
}/**
功能: 使用零时密钥对快数据进行3DES加密
参数:
@data_s: 明文信息
@data_e: 密文信息
关联:
@tempkey: 临时密钥信息
*/
void ksdes::tri_des_block(u_char * data_s,u_char * workkey,u_char * data_e)
{
    u_char left_key[9];
    u_char right_key[9];
    u_char tmpstr1[9], tmpstr2[9];

memset(left_key,0,sizeof(left_key));
memset(right_key,0,sizeof(right_key));
memset(tmpstr1,0,sizeof(tmpstr1));
memset(tmpstr2,0,sizeof(tmpstr2));    memcpy(left_key, workkey, 8 );
    memcpy(right_key,workkey+8, 8 );    des_block(data_s, left_key, tmpstr1 );
    undes_block(tmpstr1, right_key, tmpstr2 );
    des_block(tmpstr2, left_key, data_e );
}void ksdes::setMasterKey(u_char * key,int len)
{
memset(masterkey,0,sizeof(masterkey));
memcpy(masterkey,key,len);
}void ksdes::setMasterKeyHex(u_char * key,int len)
{
memset(masterkey,0,sizeof(masterkey));
ascToBcd(key,len,masterkey);
}
/**
功能: 重新设置临时密钥
*/
void ksdes::reSetTempKey()
{
memset(tempkey,0,sizeof(tempkey));
memcpy(tempkey,masterkey,16);
}/**
功能: 分散临时密钥
*/
void ksdes::diversifykey(u_char * param)
{
u_char tempParam[9];
u_char key[17];
u_char base[8];
memset(tempParam,0,sizeof(tempParam));
memset(key,0,sizeof(key));
memset( base, 0XFF, sizeof(base)); memcpy(tempParam,param,8);
Xor(tempParam,base); tri_des_block(param,tempkey,key );
tri_des_block(tempParam,tempkey, key+8);
memcpy(tempkey,key,16);
}/**
描述: 将base的每一位与param进行与或运算
参数:
@[in and out]base
@[in        ]param
*/
void ksdes::Xor(u_char *base,u_char *param)
{
for(int i=0; i<8; i++ )
base[i] ^=param[i];
}/**
功能: 关联tempkey计算传入数据的mac
参数:
@[in ]data: 需要计算MAC的数据
@[in ]len : 需要计算MAC的数据长度
@[out]mac : 获取计算出的MAC
关联:
@tempkey: 临时工作密钥
*/
void ksdes::getDataMac(u_char * data,int len,u_char * mac)
{
// u_char temp[512];
u_char tempData[512];
    u_char init[64];
    u_char block[64],output[64];
    int i,bytelen,applen,blknum;

memset(tempData,0,sizeof(tempData)); memcpy(tempData,data,len);
memset(init,0,sizeof(init));    if((len%8)!=0)
applen=8-(len%8);
else
applen=0;    bytelen=len+applen;
    blknum=bytelen/8; /*
u_char tempkeyAsc[33];
memset(tempkeyAsc,0,sizeof(tempkeyAsc));
bcdToAsc(tempkey,16,tempkeyAsc);
cout<<"计算mac临时密钥:"<<tempkeyAsc<<endl;
*/    for(i=0;i<blknum;i++)
{
memset(block,0,sizeof(block));
memset(output,0,sizeof(output)); memcpy(block,tempData+(i*8),8);
Xor(init,block); /*
memset(temp,0,sizeof(temp));
bcdToAsc(init,8,temp);
cout<<"des_block init:"<<temp<<endl;
*/ des_block(init,tempkey,output);
memcpy(init,output,8); /*
memset(temp,0,sizeof(temp));
bcdToAsc(init,8,temp);
cout<<"init:"<<temp<<endl;
*/
    } undes_block(init,tempkey+8,output);
memcpy(init,output,8); /*
memset(temp,0,sizeof(temp));
bcdToAsc(init,8,temp);
cout<<"init:"<<temp<<endl;
*/    des_block(init,tempkey,output); /*
memset(temp,0,sizeof(temp));
bcdToAsc(output,8,temp);
cout<<"init:"<<temp<<endl;
*/ memcpy(mac,output,8);
}void ksdes::printinfo()
{
u_char tempkeyAsc[33]; memset(tempkeyAsc,0,sizeof(tempkeyAsc));
bcdToAsc(masterkey,16,tempkeyAsc);
std::cout<<"本地密钥:"<<tempkeyAsc<<std::endl; memset(tempkeyAsc,0,sizeof(tempkeyAsc));
bcdToAsc(tempkey,16,tempkeyAsc);
std::cout<<"临时密钥:"<<tempkeyAsc<<std::endl;
}

/**
描述: 将bcd码转换为asc码输出
参数:
@inBcd
@len
@outAsc
*/
void ksdes::bcdToAsc(u_char *inBcd,int len, u_char* outAsc)
{
int i;
u_char cbuf[5120], ubuf[5120]; memcpy(ubuf, (const char*)inBcd, len); for(i=0;i<len;i++)
{
cbuf[2*i] = (ubuf[i] >> 4) ;
cbuf[2*i+1] = (ubuf[i] & 0x0f) ;
} for(i=0;i<len*2;i++)
{
if(cbuf[i] < 10 )
{
cbuf[i] += '0';
}
else
{
cbuf[i] += 'A' - 10;
}
} memcpy(outAsc, cbuf, len*2);
outAsc[len*2] = '\0';
}void ksdes::ascToBcd(u_char *inAsc,int len, u_char* outBcd)
{
    int i, ch;
    char tmpstr[5120];    sprintf( tmpstr, "%*.*sF", len, len, inAsc );    for( i=0; i<(len+1)/2; i++ )
    {
        sscanf( tmpstr+i*2, "%02X", &ch );
        outBcd[i] = ch & 0xFF;
    }    outBcd[i] = 0;
}

调试易

DES加密问题,急~~~~,解决马上给份

解决方案 »