檔案加密解密（源碼）

DES加密：

#include <iostream>
#include <des.h>
#pragma comment( lib, "cryptlib.lib" )
using namespace std;
using namespace CryptoPP;

int main(int argc,char* argv[])
{
    unsigned char aesKey[ DES::DEFAULT_KEYLENGTH ];
	memcpy(aesKey,argv[2],sizeof(argv[2]));
    unsigned char input[ DES::BLOCKSIZE ];
    unsigned char output[ DES::BLOCKSIZE ];
    unsigned char txt[ DES::BLOCKSIZE ];

    DESEncryption encryption_DES;
    encryption_DES.SetKey( aesKey, DES::KEYLENGTH );
    DESDecryption decryption_DES;    
    decryption_DES.SetKey( aesKey, DES::KEYLENGTH );


	FILE *in,*out,*tmp;
	int count;
    static char tmpfile[]="~u~0_sw~.f~l";
    in =fopen(argv[1],"rb");
    out =fopen(tmpfile,"wb"); /* creat a temp file */

 
   while( !feof(in) )
   {
		memset( input, 0, DES::BLOCKSIZE ); //置零
		count=fread(input,1,DES::BLOCKSIZE,in);

		encryption_DES.ProcessBlock( input, output );
		fwrite(output,1,DES::BLOCKSIZE,out);
   }
	fclose(in);
    fclose(out);

   	remove(argv[1]);
    rename(tmpfile,argv[1]); 
    system("pause");
    return 0;
}
           

DES解密：

#include <iostream>
#include <des.h>

#pragma comment( lib, "cryptlib.lib" )

using namespace std;
using namespace CryptoPP;

int main(int argc,char* argv[])
{
    unsigned char aesKey[ DES::DEFAULT_KEYLENGTH ];
	memcpy(aesKey,argv[2],sizeof(argv[2]));
    unsigned char input[ DES::BLOCKSIZE ];
    unsigned char output[ DES::BLOCKSIZE ];
    unsigned char txt[ DES::BLOCKSIZE ];

    DESEncryption encryption_DES;
    encryption_DES.SetKey( aesKey, DES::KEYLENGTH );
    DESDecryption decryption_DES;    
    decryption_DES.SetKey( aesKey, DES::KEYLENGTH );

	FILE *in,*out,*tmp;
	int count;
    static char tmpfile[]="~u~0_sw~.f~l";
    in =fopen(argv[1],"rb");
    out =fopen(tmpfile,"wb"); /* creat a temp file */
	
 
   while( !feof(in) )
   {
		memset( input, 0, DES::BLOCKSIZE ); //置零
		count=fread(input,1,DES::BLOCKSIZE,in);

		decryption_DES.ProcessBlock( input, txt );
		fwrite(txt,1,count,out);
   }

	fclose(in);
    fclose(out);
   	remove(argv[1]);
    rename(tmpfile,argv[1]); 
    system("pause");
    return 0;
}