一次一密加密解密算法实现

比眉伴天荒 2022-06-16 23:36 142阅读 0赞

**// 一次一密加密解密算法实现.cpp : Defines the entry point for the console application.  
//**

**\#include "stdafx.h"  
\#include<iostream>  
\#include<string>  
\#include<ctime>  
\#include<fstream>  
using namespace std;**

**\#define MAX 1000**

**string key = "";  
int len;**

**//加密 解密算法  
string bitcode(string str,string key,const int len)  
\{  
int i;  
string data = "";**

**for(i=0;i<len;i++)  
\{  
data += str\[i\]^key\[i\];  
\}  
return data;  
\}**

**//加密 解密密钥  
string generateKey(const int len)  
\{  
srand((unsigned)time(NULL));  
string k = "";  
for(int i= 0;i<len;i++)  
k += rand()%10 +'0';  
return k;  
\}**

**int \_tmain(int argc, \_TCHAR\* argv\[\])  
\{  
//可以不用这么繁琐，为了可以练习文件操作  
char cmd;  
do\{  
//把输入的字符串放在文件中  
ofstream file1\_out("Data.txt",ios::out|ios::trunc);  
string data;  
cout<<"请输入明文:"<<endl;  
getline(cin,data);  
int len = data.length();  
file1\_out<<data;  
file1\_out.close();  
//从文件中读出字符串  
ifstream file1\_in("Data.txt",ios::in);  
string BefEcry ="";  
while(!file1\_in.eof())  
\{  
BefEcry += file1\_in.get(); //BefEcry 后面还有一个换行符  
\}  
//去掉BefEcry 后面的换行符  
string::iterator it1 = BefEcry.end();  
BefEcry.erase(it1-1,it1);  
cout<<"\*\*\*\*\*\*\*\*\*\*\*\*\*\*"<<endl;  
cout<<"明文为："<<endl;  
cout<<BefEcry<<endl;;  
file1\_in.close();  
key = generateKey(len);  
cout<<"加密密钥为："<<endl;  
cout<<key<<endl;  
string Encryped;  
//加密  
Encryped = bitcode(BefEcry,key,len);  
//把加密后的字符串写入文件中  
ofstream file2\_out("Encryption.txt",ios::out|ios::trunc);  
file2\_out<<Encryped;  
file2\_out.close();  
cout<<"加密后的密文为:"<<endl;  
cout<<Encryped<<endl;  
//从文件中读出字加密符串  
ifstream file2\_in("Encryption.txt",ios::in);  
string Decrypted;  
while(!file2\_in.eof())  
\{  
Decrypted += file2\_in.get(); //Decrypted后面还有一个换行符  
\}  
//去掉Decrypted 后面的换行符  
string::iterator it2 = Decrypted.end();  
Decrypted.erase(it2-1,it2);  
file2\_in.close();  
//解密  
Decrypted = bitcode(Decrypted,key,len);  
cout<<"解密后的明文为:"<<endl;  
cout<<Decrypted<<endl;;  
cout<<"继续吗？(Y/n):";  
cin>>cmd;  
\}while(cmd=='y'||cmd=='y');  
system("pause");  
return 0;  
\}**

**------------------------------------------------------程序测试-----------------------------------------------**

**请输入明文:  
This is a program which is about Encryption and Decryption!  
\*\*\*\*\*\*\*\*\*\*\*\*\*\*  
明文为：  
This is a program which is about Encryption and Decryption!  
加密密钥为：  
37512943377123677155495235224596620201331234081461349323048  
加密后的密文为:  
g\_\\BPGRGC\]TDVZB\]\]Z\]ZFSVZLBw^QBHCGX\]\]QVUrTPF@CFZ\_Z  
解密后的明文为:  
This is a program which is about Encryption and Decryption!  
继续吗？(Y/n):n  
请按任意键继续. . .**