Java简单数据加密方法DES实现过程解析
这篇文章主要介绍了Java简单数据加密方法DES实现过程解析,文中通过示例代码介绍的非常详细,对大家的学习或者工作具有一定的参考学习价值,需要的朋友可以参考下
1.数据在网络中传输时,需要进行加密处理
双方约定一个相同的key(key不在网络中进行传输,只传输加密数据),然后根据将key根据一定的DES规则转换,得到真正的key,在进行加密和解密,为了增加安全性,加密过程中再加上编码base64转换,解密时先解码base64
加密和解密的完整的代码:
package com.cmit.hall.plat.play.utils; import java.security.GeneralSecurityException; import java.security.Key; import java.util.Base64; import javax.crypto.Cipher; import javax.crypto.SecretKeyFactory; import javax.crypto.spec.DESKeySpec; import org.apache.commons.codec.DecoderException; import org.apache.commons.codec.binary.Hex; /** * 数据加密 DES方式 + Base64 * @author sun_flower * */ public class EncryUtils { public static final String KEY = "gEpCIKFVdPEBJ1pM5pLSviM2Nrj5C/A4iAw8ou+jiJpnrXigolapdcJXfmh2tECyuQnaFrvZHabcdefghijklmnabcdefghijklmnabcdefghijklmnabcdefghijklmn"; /** * 测试 * @param args * @throws Exception */ public static void main(String[] args) throws Exception { Key convertSecretKey = generateSecret(KEY); String data = "{\"code\":\"100\",\"roleId\":[],\"userDesc\":\"测试\",\"sessionId\":\"90EA80C89F6187BAB363C9347F759E39\",\"roleList\":[],\"userName\":\"chenpeng\",\"checkCode\":\"\",\"token\":\"\",\"password\":\"eFEBcXRwTW2oMFSDwGwUKQ==\",\"createTime\":\"2019-05-27 15:30:14\",\"levelId\":\"1\",\"staffName\":\"\",\"id\":1502,\"userType\":\"1\",\"oldPwd\":\"\"}"; String enStr = encodeString(convertSecretKey, data); decodeString(convertSecretKey, enStr); } /** * 转换key * @param key * @return * @throws GeneralSecurityException */ public static Key generateSecret(String key) throws GeneralSecurityException { byte[] bytesKey = key.getBytes(); DESKeySpec desKeySpec = new DESKeySpec(bytesKey);//实例化DESKey秘钥的相关内容 SecretKeyFactory factory = SecretKeyFactory.getInstance("DES");//实例一个秘钥工厂,指定加密方式 Key convertSecretKey = factory.generateSecret(desKeySpec); return convertSecretKey; } /** * 加密 * @param convertSecretKey * @param date * @return * @throws GeneralSecurityException */ public static String encodeString(Key convertSecretKey, String data) throws GeneralSecurityException { Cipher cipher = Cipher.getInstance("DES/ECB/PKCS5Padding");//通过Cipher这个类进行加解密相关操作 cipher.init(Cipher.ENCRYPT_MODE, convertSecretKey); byte[] enData = Base64.getEncoder().encode(data.getBytes()); byte[] result = cipher.doFinal(enData);//输入要加密的内容 System.out.println("加密的结果:" + Hex.encodeHexString(result)); return Hex.encodeHexString(result); } /** * 解密 * @param convertSecretKey * @param date * @return * @throws GeneralSecurityException * @throws DecoderException */ public static String decodeString(Key convertSecretKey, String data) throws GeneralSecurityException, DecoderException { Cipher cipher = Cipher.getInstance("DES/ECB/PKCS5Padding");//通过Cipher这个类进行加解密相关操作 cipher.init(Cipher.DECRYPT_MODE, convertSecretKey); byte[] hdata = Hex.decodeHex(data.toCharArray()); byte[] result = cipher.doFinal(hdata); byte[] decode = Base64.getDecoder().decode(result); System.out.println("解密结果:" + new String(decode)); return new String(decode); } }
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持我们。
赞 (0)