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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