JAVA高级面试进阶训练营视频教程

admin

　　最近在做android游戏，客户端与Nodejs服务端数据的交互用AES进行加密，发现Nodejs与java的加密形式不一样。查询N久资料发现java端需要对密钥再MD5加密一遍（我了个大擦），本来对加密一类就陌生，这。。。

　　下面把nodejs 和 JAVA的代码贴这了

JAVA：

 1 package com.LOLnet;
 2 import java.security.MessageDigest;  
 3   
 4 import javax.crypto.Cipher;  
 5 import javax.crypto.spec.SecretKeySpec;  
 6   
 7 public class AESForNodejs {  
 8     public static final String DEFAULT_CODING = "utf-8";  
 9   
10     //解密
11     public static String decrypt(String encrypted, String seed) throws Exception {  
12         byte[] keyb = seed.getBytes(DEFAULT_CODING);  
13         MessageDigest md = MessageDigest.getInstance("MD5");  
14         byte[] thedigest = md.digest(keyb);  
15         SecretKeySpec skey = new SecretKeySpec(thedigest, "AES");  
16         Cipher dcipher = Cipher.getInstance("AES");  
17         dcipher.init(Cipher.DECRYPT_MODE, skey);  
18   
19         byte[] clearbyte = dcipher.doFinal(toByte(encrypted));  
20         return new String(clearbyte);  
21     }  
22   
23     //加密
24     public static String encrypt(String content, String key) throws Exception {  
25         byte[] input = content.getBytes(DEFAULT_CODING);  
26           
27         MessageDigest md = MessageDigest.getInstance("MD5");  
28         byte[] thedigest = md.digest(key.getBytes(DEFAULT_CODING));  
29         SecretKeySpec skc = new SecretKeySpec(thedigest, "AES");  
30         Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");  
31         cipher.init(Cipher.ENCRYPT_MODE, skc);  
32           
33         byte[] cipherText = new byte[cipher.getOutputSize(input.length)];  
34         int ctLength = cipher.update(input, 0, input.length, cipherText, 0);  
35         ctLength += cipher.doFinal(cipherText, ctLength);  
36               
37         return parseByte2HexStr(cipherText);  
38     }  
39       
40     //字符串转字节
41     private static byte[] toByte(String hexString) {  
42         int len = hexString.length() / 2;  
43         byte[] result = new byte[len];  
44         for (int i = 0; i < len; i++) {  
45             result = Integer.valueOf(hexString.substring(2 * i, 2 * i + 2), 16).byteValue();  
46         }  
47         return result;  
48     }  
49       
50     
51     //字节转16进制数组     
52     private static String parseByte2HexStr(byte buf[]) {  
53         StringBuffer sb = new StringBuffer();  
54         for (int i = 0; i < buf.length; i++) {  
55             String hex = Integer.toHexString(buf & 0xFF);  
56             if (hex.length() == 1) {  
57                 hex = '0' + hex;  
58             }  
59             sb.append(hex);  
60         }  
61         return sb.toString();  
62     }  
63 }  

 

 

Node：

/**
 * Created with JetBrains WebStorm.
 * User: rube
 * Date: 4/7/14
 * Time: 4:33 PM
 * To change this template use File | Settings | File Templates.
 */
var crypto = require('crypto');

/**
 * aes128加密
 * @param data     明文
 * @param secretKey  密钥
 * @returns {*}
 */
exports.encrypt = function (data, secretKey) {
    var cipher = crypto.createCipher('aes-128-ecb',secretKey);
    return cipher.update(data,'utf8','hex') + cipher.final('hex');
};

/**
 * aes128解密
 * @param data        密文
 * @param secretKey     密钥
 * @returns {*}
 */
exports.decrypt = function(data, secretKey) {
    var cipher = crypto.createDecipher('aes-128-ecb',secretKey);
    return cipher.update(data,'hex','utf8') + cipher.final('utf8');
}

 

google了一天头好疼啊～