对称加密算法 之 PBE 篇

package com.baikeyang.EncrptionProject;

import java.security.Key;
import java.security.SecureRandom;

import javax.crypto.Cipher;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.PBEKeySpec;
import javax.crypto.spec.PBEParameterSpec;

import org.apache.commons.codec.binary.Base64;

public class PBEEncrption {
	
	public static void main(String[] args) {
		jdkPBE();
	}
	
	static String str = "采用JDK实现对称加密PBE算法";
	
	public static void jdkPBE(){
		try {
			//初始化盐
			SecureRandom random = new SecureRandom();
			byte[] salt =random.generateSeed(8);
			
			// 口令与密钥
			String password = "baikeyang.com";
			PBEKeySpec pbeKeySpec = new PBEKeySpec(password.toCharArray());
			SecretKeyFactory factory = SecretKeyFactory.getInstance("PBEWITHMD5andDES");
			Key key = factory.generateSecret(pbeKeySpec);
			
			// 加密
			PBEParameterSpec parameterSpec = new PBEParameterSpec(salt, 100);
			Cipher cipher = Cipher.getInstance("PBEWITHMD5andDES");
			cipher.init(Cipher.ENCRYPT_MODE, key, parameterSpec);
			byte[] result = cipher.doFinal(str.getBytes());
			System.out.println(Base64.encodeBase64String(result));
			
			// 解密
			cipher.init(Cipher.DECRYPT_MODE, key, parameterSpec);
			result = cipher.doFinal(result);
			System.out.println(new String(result));
			
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
}