求大侠帮忙修改一下这个des算法，用c或c++~~~

Question

http://zhidao.baidu.com/question/162347019.html
算法是这个网址上的算法，要求修改成以下条件：
1.明文，密钥和密文不需要以文件形式为输入输出。直接内置或者键盘输入都行，最好内置。
2.明文和密钥都为已知的64位2进制数，不需要字符或者别的东西，不需要填充操作。
3.不需要解密操作。

我在做这3个条件的过程中，主要问题是第2项，里面的像ByteToBit类似的函数也看不太懂。要修改成这样的原因是为了生成伪随机数，所以不需要加密解密文件这么复杂，只要把已知的2进制数加密成另一个2进制数就行了，当然初始密钥也是已知的2进制数。所以请教一下各位大侠，有没有能帮忙修改一下的。调试运行通过的，再加100分！！！
同时也欢迎各位大侠能指导一下，我的qq：251780375。
回答一或许没有明白我的意思，这里的加密解密函数里的参数是指针类型的，作用是以文件为输入再以文件为输出，这个步骤我不需要，我只要一个64位的字符或者整形数组把2进制数明文放进去运算成密文就行了，连解密都不用。
有心的最好把main函数也写一下，差不多就这样。

Answer 1

#include "stdio.h"
#include "memory.h"
#include "time.h"
#include "stdlib.h"
#include <iostream>
using namespace std;

#define PLAIN_FILE_OPEN_ERROR -1
#define KEY_FILE_OPEN_ERROR -2
#define CIPHER_FILE_OPEN_ERROR -3
#define OK 1

typedef long ElemType;

/*初始置换表IP*/
long IP_Table[64] = { 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,
56,48,40,32,24,16,8,0,
58,50,42,34,26,18,10,2,
60,52,44,36,28,20,12,4,
62,54,46,38,30,22,14,6};
/*逆初始置换表IP^-1*/
long IP_1_Table[64] = {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,
32,0,40,8,48,16,56,24};

/*扩充置换表E*/
long E_Table[48] = {31, 0, 1, 2, 3, 4,
3, 4, 5, 6, 7, 8,
7, 8,9,10,11,12,
11,12,13,14,15,16,
15,16,17,18,19,20,
19,20,21,22,23,24,
23,24,25,26,27,28,
27,28,29,30,31, 0};

/*置换函数P*/
long P_Table[32] = {15,6,19,20,28,11,27,16,
0,14,22,25,4,17,30,9,
1,7,23,13,31,26,2,8,
18,12,29,5,21,10,3,24};

/*S盒*/
long S[8][4][16] =
/*S1*/
{{{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}},
/*S2*/
{{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}},
/*S3*/
{{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}},
/*S4*/
{{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}},
/*S5*/
{{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}},
/*S6*/
{{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}},
/*S7*/
{{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}},
/*S8*/
{{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}}};
/*置换选择1*/
long PC_1[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};

/*置换选择2*/
long PC_2[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,
50,44,32,46,43,48,38,55,
33,52,45,41,49,35,28,31};

/*对左移次数的规定*/
long MOVE_TIMES[16] = {1,1,2,2,2,2,2,2,1,2,2,2,2,2,2,1};

/*密钥置换1*/
long DES_PC1_Transform(ElemType key[64], ElemType tempbts[56]){
long cnt;
for(cnt = 0; cnt < 56; cnt++){
tempbts[cnt] = key[PC_1[cnt]];
}
return 0;
}

long DES_ROL(ElemType data[56], long time){
ElemType temp[56];

/*保存将要循环移动到右边的位*/
memcpy(temp,data,time);
memcpy(temp+time,data+28,time);

/*前28位移动*/
memcpy(data,data+time,28-time);
memcpy(data+28-time,temp,time);

/*后28位移动*/
memcpy(data+28,data+28+time,28-time);
memcpy(data+56-time,temp+time,time);

return 0;
}

long DES_PC2_Transform(ElemType key[56], ElemType tempbts[48]){
long cnt;
for(cnt = 0; cnt < 48; cnt++){
tempbts[cnt] = key[PC_2[cnt]];
}
return 0;
}
/*生成子密钥*/
long DES_MakeSubKeys(ElemType key[64],ElemType subKeys[16][48]){
ElemType temp[56];
ElemType temp1[48];

long cnt;
DES_PC1_Transform(key,temp);/*PC1置换*/
for(cnt = 0; cnt < 16; cnt++){/*16轮跌代，产生16个子密钥*/
DES_ROL(temp,MOVE_TIMES[0]);
DES_PC2_Transform(temp,temp1);
for(long i=0;i<48;i++)
subKeys[cnt][i]=temp1[i];
}
return 0;
}

/*扩展置换*/
long DES_E_Transform(ElemType data[48]){
long cnt;
ElemType temp[48];
for(cnt = 0; cnt < 48; cnt++){
temp[cnt] = data[E_Table[cnt]];
}
memcpy(data,temp,48);
return 0;
}

/*IP置换*/
long DES_IP_Transform(ElemType data[64]){
long cnt;
ElemType temp[64];
for(cnt = 0; cnt < 64; cnt++){
temp[cnt] = data[IP_Table[cnt]];
}
memcpy(data,temp,64);
return 0;
}

/*IP逆置换*/
long DES_IP_1_Transform(ElemType data[64]){
long cnt;
ElemType temp[64];
for(cnt = 0; cnt < 64; cnt++){
temp[cnt] = data[IP_1_Table[cnt]];
}
memcpy(data,temp,64);
return 0;
}
long DES_P_Transform(ElemType data[32]){
long cnt;
ElemType temp[32];
for(cnt = 0; cnt < 32; cnt++){
temp[cnt] = data[P_Table[cnt]];
}
memcpy(data,temp,32);
return 0;
}

/*异或*/
long DES_XOR(ElemType R[48], ElemType L[48] ,long count){
long cnt;
for(cnt = 0; cnt < count; cnt++){
R[cnt] ^= L[cnt];
}
return 0;
}

/*S盒置换*/
long DES_SBOX(ElemType data[48]){
long cnt;
long line,row,output;
long cur1,cur2;
for(cnt = 0; cnt < 8; cnt++){
cur1 = cnt*6;
cur2 = cnt<<2;

/*计算在S盒中的行与列*/
line = (data[cur1]<<1) + data[cur1+5];
row = (data[cur1+1]<<3) + (data[cur1+2]<<2)
+ (data[cur1+3]<<1) + data[cur1+4];
output = S[cnt][line][row];

/*化为2进制*/
data[cur2] = (output&0X08)>>3;
data[cur2+1] = (output&0X04)>>2;
data[cur2+2] = (output&0X02)>>1;
data[cur2+3] = output&0x01;
}
return 0;
}

/*交换*/
long DES_Swap(ElemType left[32], ElemType right[32]){
ElemType temp[32];
memcpy(temp,left,32);
memcpy(left,right,32);
memcpy(right,temp,32);
return 0;
}

/*加密单个分组*/
long DES_EncryptBlock(ElemType plainBits[64], ElemType subKeys[16][48], ElemType cipherBlock[64]){

ElemType copyRight[48];
long cnt;
long temp[48];

/*初始置换（IP置换）*/
DES_IP_Transform(plainBits);

/*16轮迭代*/
for(cnt = 0; cnt < 16; cnt++){
memcpy(copyRight,plainBits+32,32);
/*将右半部分进行扩展置换，从32位扩展到48位*/
DES_E_Transform(copyRight);
/*将右半部分与子密钥进行异或操作*/
DES_XOR(copyRight,temp,48);
for(long i=0;i<48;i++)
subKeys[cnt][i]=temp[i];
/*异或结果进入S盒，输出32位结果*/
DES_SBOX(copyRight);
/*P置换*/
DES_P_Transform(copyRight);
/*将明文左半部分与右半部分进行异或*/
DES_XOR(plainBits,copyRight,32);
if(cnt != 15){
/*最终完成左右部的交换*/
DES_Swap(plainBits,plainBits+32);
}
}
/*逆初始置换（IP^1置换）*/
DES_IP_1_Transform(plainBits);
//Bit64ToChar8(plainBits,cipherBlock);
memcpy(cipherBlock,plainBits,64);
return 0;
}

long DES_jiami(long a[64],long bkey[64])
{
long copyRight[48];
long subkey[16][48];
long temp[48];
DES_MakeSubKeys(bkey,subkey);

DES_IP_Transform(a);

for(long cnt = 0; cnt < 16; cnt++){
for(long k=0;k<32;k++)
copyRight[k]=a[32+k];
copyRight[32]=a[32];
copyRight[33]=a[35];
copyRight[34]=a[36];
copyRight[35]=a[39];
copyRight[36]=a[40];
copyRight[37]=a[43];
copyRight[38]=a[44];
copyRight[39]=a[47];
copyRight[40]=a[48];
copyRight[41]=a[52];
copyRight[42]=a[53];
copyRight[43]=a[56];
copyRight[44]=a[57];
copyRight[45]=a[61];
copyRight[46]=a[62];
copyRight[47]=a[63];

DES_E_Transform(copyRight);
DES_XOR(copyRight,subkey[cnt],48);
DES_SBOX(copyRight);
DES_P_Transform(copyRight);
DES_XOR(a,copyRight,32);
if(cnt!=15){
DES_Swap(a,a+32);
}
}
DES_IP_1_Transform(a);

return 0;
}

long main()
{
long bkey[64]={
1,0,1,1,0,1,1,0,
1,0,0,1,0,0,1,0,
0,1,1,0,1,0,1,0,
0,1,0,1,0,0,1,1,
0,1,0,1,0,1,1,0,
1,0,1,0,1,0,0,1,
0,1,1,0,1,1,0,1,
1,0,1,1,1,1,0,1
};
long a[64]={
1,0,1,1,0,1,1,0,
0,0,1,0,1,0,1,0,
0,1,1,0,1,0,1,0,
0,1,0,1,0,0,1,1,
1,0,1,1,1,0,1,1,
1,0,1,0,1,0,0,1,
0,0,1,0,1,0,0,1,
1,0,1,1,0,0,1,0
};
long b[64]={
0,1,0,0,1,0,1,0,
1,0,1,0,0,1,0,1,
0,1,0,1,0,1,1,0,
1,0,1,0,1,1,0,1,
0,1,0,1,0,0,1,1,
1,1,1,1,0,0,1,0,
0,1,0,1,0,1,1,0,
0,1,0,1,0,1,0,1
};
long c[8],d[8];
DES_jiami(a,bkey);
DES_jiami(b,bkey);
c[0]=1;
c[7]=1;
d[0]=1;
d[7]=1;
for(long x=0;x<6;x++)
c[1+x]=a[58+x];
// for(long j=0;j<8;j++){
// cout<<c[j];
// }
for( x=0;x<6;x++)
d[1+x]=b[58+x];
// cout<<endl;
long t,p;
//t=c[7]+c[6]*10+c[5]*100+c[4]*1000+c[3]*10000+c[2]*100000+c[1]*1000000+c[0]*10000000;

t=c[7]+c[6]*2+c[5]*4+c[4]*8+c[3]*16+c[2]*32+c[1]*64+c[0]*128;
p=d[7]+d[6]*2+d[5]*4+d[4]*8+d[3]*16+d[2]*32+d[1]*64+d[0]*128;

cout<<t<<endl;
cout<<p<<endl;

return 0;
}
肯定能用~~~~

Answer 2

根本就不需要改
int DES_Encrypt(char *plainText, int datalen,char *keyStr,char *cipherText) 这个就是加密
int DES_Decrypt(char *cipherText, int &cipherlen,char *keyStr,char **plainText) 这个是解密

Answer 3

要改的是：
（1)首先生成明文的64bit的随机数
（2）由于加密函数的输入是字节类型的，那么在调入加密函数前利用bittobyte函数把明文转化成为8个字节就可以了。
再把读写文件的函数和解密函数直接删掉就行了。