Java与Node.js利用AES加密解密出相同结果的方法示例

前言

工作中遇到nodejs端通过aes加密，安卓客户端Java解密，同样nodejs也需要解密安卓客户端加密过来的内容，发现两个加密结果不一样，查询资料发现java端需要对密钥再MD5加密一遍，以下是Java与Node.js利用AES加密解密出相同结果的方法，需要的朋友们下面来一起学习学习吧。

JAVA代码如下：

package g.g;

import java.security.MessageDigest;

import javax.crypto.Cipher;
import javax.crypto.spec.SecretKeySpec;

public class AesECB {
 public static final String DEFAULT_CODING = "utf-8"; 
  
 /** 
  * 解密 
  * @author lmiky 
  * @date 2014-2-25 
  * @param encrypted 
  * @param seed 
  * @return 
  * @throws Exception 
  */ 
 private static String decrypt(String encrypted, String seed) throws Exception { 
  byte[] keyb = seed.getBytes(DEFAULT_CODING); 
  MessageDigest md = MessageDigest.getInstance("MD5"); 
  byte[] thedigest = md.digest(keyb); 
  SecretKeySpec skey = new SecretKeySpec(thedigest, "AES"); 
  Cipher dcipher = Cipher.getInstance("AES"); 
  dcipher.init(Cipher.DECRYPT_MODE, skey); 
 
  byte[] clearbyte = dcipher.doFinal(toByte(encrypted)); 
  return new String(clearbyte); 
 } 
 
 /** 
  * 加密 
  * @author lmiky 
  * @date 2014-2-25 
  * @param content 
  * @param key 
  * @return 
  * @throws Exception 
  */ 
 public static String encrypt(String content, String key) throws Exception { 
  byte[] input = content.getBytes(DEFAULT_CODING); 
   
  MessageDigest md = MessageDigest.getInstance("MD5"); 
  byte[] thedigest = md.digest(key.getBytes(DEFAULT_CODING)); 
  SecretKeySpec skc = new SecretKeySpec(thedigest, "AES"); 
  Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding"); 
  cipher.init(Cipher.ENCRYPT_MODE, skc); 
   
  byte[] cipherText = new byte[cipher.getOutputSize(input.length)]; 
  int ctLength = cipher.update(input, 0, input.length, cipherText, 0); 
  ctLength += cipher.doFinal(cipherText, ctLength); 
    
  return parseByte2HexStr(cipherText); 
 } 
  
 /** 
  * 字符串转字节数组 
  * @author lmiky 
  * @date 2014-2-25 
  * @param hexString 
  * @return 
  */ 
 private static byte[] toByte(String hexString) { 
  int len = hexString.length() / 2; 
  byte[] result = new byte[len]; 
  for (int i = 0; i < len; i++) { 
   result[i] = Integer.valueOf(hexString.substring(2 * i, 2 * i + 2), 16).byteValue(); 
  } 
  return result; 
 } 
  
 /** 
  * 字节转16进制数组 
  * @author lmiky 
  * @date 2014-2-25 
  * @param buf 
  * @return 
  */ 
 private static String parseByte2HexStr(byte buf[]) { 
  StringBuffer sb = new StringBuffer(); 
  for (int i = 0; i < buf.length; i++) { 
   String hex = Integer.toHexString(buf[i] & 0xFF); 
   if (hex.length() == 1) { 
    hex = '0' + hex; 
   } 
   sb.append(hex); 
  } 
  return sb.toString(); 
 } 
  
 public static void main(String[] args) throws Exception { 
  System.out.println(AesECB.encrypt("fsadfsdafsdafsdafsadfsadfsadf", "1eVRiqy7b9Uv7ZMM")); 
  System.out.println(AesECB.decrypt("b123e2d9199598c0e3f1999dc9e723387b68e29d2b3a0d59fc7d5946c750c6b4", "1eVRiqy7b9Uv7ZMM")); 
 }
}

Node.js代码如下：

var crypto = require('crypto');
exports.aes_algorithm = "aes-128-ecb";
exports.aes_secrect = "1eVRiqy7b9Uv7ZMM";

exports.encrypt = function (text) {
 var cipher = crypto.createCipher(this.aes_algorithm, this.aes_secrect)
 var crypted = cipher.update(text, 'utf8', 'hex')
 crypted += cipher.final('hex');
 return crypted;
};

exports.decrypt = function (text) {
 var decipher = crypto.createDecipher(this.aes_algorithm, this.aes_secrect)
 var dec = decipher.update(text, 'hex', 'utf8')
 dec += decipher.final('utf8');
 return dec;
};

//var hw = this.encrypt("fsadfsdafsdafsdafsadfsadfsadf");
//console.log(hw);
//console.log(this.decrypt(hw));

总结

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