Encrypt Decry pt for android and NODE JS

 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     //Decrypt
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     //Encryption
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     //String to byte
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[i] = Integer.valueOf(hexString.substring(2 * i, 2 * i + 2), 16).byteValue();  
46         }  
47         return result;  
48     }  
49       
50     
51     //16 hexadecimal byte array     
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[i] & 0xFF);  
56             if (hex.length() == 1) {  
57                 hex = '0' + hex;  
58             }  
59             sb.append(hex);  
60         }  
61         return sb.toString();  
62     }  
63 }  

Node:

var crypto = require('crypto');

/**
 * Aes128 encryption
 * @Param data plaintext
 * @Param secretKey key
 * @returns {*}
 */
exports.encrypt = function (data, secretKey) {
    var cipher = crypto.createCipher('aes-128-ecb',secretKey);
    return cipher.update(data,'utf8','hex') + cipher.final('hex');
};

/**
 * Aes128 decryption
 * @Param data ciphertext
 * @Param secretKey key
 * @returns {*}
 */
exports.decrypt = function(data, secretKey) {
    var cipher = crypto.createDecipher('aes-128-ecb',secretKey);
    return cipher.update(data,'hex','utf8') + cipher.final('utf8');
}