用DES算法对图片进行加密解密

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1、//main.cpp#include"DES.h"#include#include#includeusingnamespacestd;voidEncrypt_Mode(void);voidTest_Mode(void);intmain(){intchoose;cout<<"ttt####S-BOXDesign####"<

2、yS-Box4.MyDesignS-Box"<>choose;if((choose!=1)&&(choose!=2)&&(choose!=3)&&(choose!=4)){cout<<"ErrorChoose!"<

3、SBox();break;}cout<<"ttt####DESEncryptSystem####"<>choose;system("cls");switch(choose){case1:Encrypt_Mode();break;case2:Test_Mode();break;default:cout<<"ErrorChoose!"<

4、}////////////////////////////////////////////////////////////////////////////////////voidEncrypt_Mode(){uvar32FileSize,Offset,DataSize;charIV[]="wangyao";charkey[8]={1,9,8,7,0,3,1,4};charplaint[8]={0},crypt[8]={0};//stringHeader;charHeader[HEAD_LEN];ifstr

5、eamfin;ofstreamfout;intchoose;while(true){cout<<"tttDESEncryptBMPFileSystem"<>choose;if(choose==5)break;elseif((choose!=1)&&(choose!=2)&&(choos

6、e!=3)&&(choose!=4)){cout<<"WrongChoose!"<>filename;ifstreamfin(filename.c_str(),ios::binary);stringoutfilename=filename;outfilename="out_"+outfilename;ofstreamfout(outfilename.c_str(),ios::binary

7、);if(!fin

8、

9、!fout){cout<<"OpenFileError!"<

10、ar32));//GettheOffsetoftheRealSizeDataSize=FileSize-Offset;//GettheDataSize;Alsocanbedoneby"DataSize"FieldintheHeader//SettheKeyDes_SetKey(key);//CopytheHeadertoencryptfilefin.seekg(ios::beg);fin.read(Header,Offset)