【Java/PBE】使用PBEWITHMD5andDES加密解密

程序：

package ufo;

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 PBEWITHMD5andDES_Test {
    public static void main(String... args) {
        String original="Let’s Build a Giant Airship 青海长云暗雪山";
        System.out.println("原文=\t"+original);
        
        try {
            // 生产密钥
            String password="haha168";// 口令
            PBEKeySpec pbeKeySpec = new PBEKeySpec(password.toCharArray());
            SecretKeyFactory factory=SecretKeyFactory.getInstance("PBEWITHMD5andDES");
            Key key =factory.generateSecret(pbeKeySpec);// 密钥，下面加密解密都要用到
            System.out.println("密钥=\t"+Base64.encodeBase64String(key.getEncoded()));
            
            // 初始化盐
            SecureRandom random=new SecureRandom();
            byte [] salt=random.generateSeed(8);
            PBEParameterSpec pbeParameterSpec=new PBEParameterSpec(salt, 100);
            
            // 加密
            Cipher cipher =Cipher.getInstance("PBEWITHMD5andDES");
            cipher.init(Cipher.ENCRYPT_MODE,key, pbeParameterSpec);
            byte[] bytes = cipher.doFinal(original.getBytes());
            System.out.println("密文=\t"+Base64.encodeBase64String(bytes));
            
            // 解密
            cipher.init(Cipher.DECRYPT_MODE,key,pbeParameterSpec);
            bytes=cipher.doFinal(bytes);
            System.out.println("解密后=\t"+new String(bytes));
            
        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
}

输出：

原文=    Let’s Build a Giant Airship 青海长云暗雪山
密钥=    aGFoYTE2OA==
密文=    fgYLsGkeyJCzYkp7W5FgsxoIjtVCjd4yiYUOoiE4tdx0CV3Xx7EcbwsRoIMSaEIy
解密后=    Let’s Build a Giant Airship 青海长云暗雪山

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