DES 双向加密算法 DESUtil

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package com.xgh.encryption.algorithm.test;import java.security.SecureRandom;import javax.crypto.Cipher;import javax.crypto.KeyGenerator;import javax.crypto.SecretKey;import javax.crypto.spec.SecretKeySpec;import junit.framework.TestCase;import sun.misc.BASE64Decoder;import sun.misc.BASE64Encoder;/*** *  DES 双向加密算法 * @author xgh * */public class DESUtil extends TestCase{/*** * DES 双向加密算法 * @param content   待加密内容  * @param password  加密密钥 * @return */public  byte[] testEncryptDES() throws Exception{ String content = "Hello,明天天气不错";String password = "123456";KeyGenerator kgen = KeyGenerator.getInstance("DES");kgen.init(128, new SecureRandom(password.getBytes()));SecretKey secretKey = kgen.generateKey();byte[] enCodeFormat = secretKey.getEncoded();SecretKeySpec key = new SecretKeySpec(enCodeFormat, "DES");Cipher cipher = Cipher.getInstance("DES");// 创建密码器byte[] byteContent = content.getBytes("UTF-8");cipher.init(Cipher.ENCRYPT_MODE, key);// 初始化byte[] result = cipher.doFinal(byteContent);System.out.println("DES加密原数据:");System.out.println(content);System.out.println("DES加密后的Base64结果:");System.out.println(new BASE64Encoder().encode(result));System.out.println("------------------------------------");return result; // 加密}/*** *  DES 双向加密算法 * @param content  待解密内容  * @param password 解密密钥 * @return */public  byte[] testDecryptDES() throws Exception{String content = "2M8d6HQ0qtXqSSuL83ILs348ls6C8JlZnfu0UFgCkOw=";String password = "123456";byte[] contentbyte = new BASE64Decoder().decodeBuffer(content);KeyGenerator kgen = KeyGenerator.getInstance("DES");kgen.init(128, new SecureRandom(password.getBytes()));SecretKey secretKey = kgen.generateKey();byte[] enCodeFormat = secretKey.getEncoded();SecretKeySpec key = new SecretKeySpec(enCodeFormat, "DES");Cipher cipher = Cipher.getInstance("DES");// 创建密码器cipher.init(Cipher.DECRYPT_MODE, key);// 初始化byte[] result = cipher.doFinal(contentbyte);System.out.println("解密结果:");System.out.println(new String(result,"UTF-8"));System.out.println("------------------------------------");return result; // 加密}}
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