aes1.java

AES C++加密解密和java版加密解密方法

package com.ss;

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;

import java.security.SecureRandom;

import javax.crypto.BadPaddingException;
import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;
import javax.crypto.SecretKey;
import javax.crypto.spec.SecretKeySpec;

public class AES1 {

	public static void main(String[] args) throws Exception { 
		String pwd ="abcdefghabcdefgh";
		File file = new File("H:/PunishListEn20070918154714-20872.xml");
		//System.out.println(file.length());
		//encryptfile	(pwd, file);	
	}
	public String  encryptfile(String pwd, File file) throws Exception
	{
		int i = 0;
		BufferedInputStream bis = new BufferedInputStream(new FileInputStream(file)); 
		byte[] bytIn = new byte[(int)file.length()]; 
		bis.read(bytIn); 
		bis.close(); 
		  
	
		
		byte[] raw = pwd.getBytes("ASCII");
		SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
		
		Cipher cipher = Cipher.getInstance("AES");
		cipher.init(Cipher.DECRYPT_MODE, skeySpec);
		
		String doc = "";
		
			try{
				
				byte[] bytOut = cipher.update(bytIn); 
				doc = new String (bytOut);
				
			}catch(Exception e){
				e.printStackTrace();
				
			}
			return doc;
		
			
	}
	
}