Ruby中HmacMD5加密

跟Java方面做接口，中间有一个HmacMD5的加密算法需要我们来实现
so，so结果如下

gem install ruby-hmac

require 'hmac-md5'
HMAC::MD5.new("test_key").update("test_string").hexdigest.upcase()

ruby的输出结果

引用

=> "3FD9B6B4901DAF25BFB9DAA0718B3698"

package com.study;


import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;

import javax.crypto.Mac;
import javax.crypto.SecretKey;
import javax.crypto.spec.SecretKeySpec;


public class HmacMD5 {

    private static byte[] encryptHMAC(String data, String secret) {
        byte[] bytes = null;
            SecretKey secretKey;
            try {
                secretKey = new SecretKeySpec(secret.getBytes(Constants.CHARSET_UTF8), "HmacMD5");
                Mac mac = Mac.getInstance(secretKey.getAlgorithm());
                mac.init(secretKey);
                bytes = mac.doFinal(data.getBytes(Constants.CHARSET_UTF8));
            } catch (UnsupportedEncodingException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            } catch (NoSuchAlgorithmException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            } catch (InvalidKeyException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }

        return bytes;
    }

    private static String byte2hex(byte[] bytes) {
        StringBuilder sign = new StringBuilder();
        for (int i = 0; i < bytes.length; i++) {
            String hex = Integer.toHexString(bytes[i] & 0xFF);
            if (hex.length() == 1) {
                sign.append("0");
            }
            sign.append(hex.toUpperCase());
        }
        return sign.toString();
    }
    

    public abstract class Constants
    {
      public static final String CHARSET_UTF8 = "UTF-8";
    }


    public static void main(String[] args) throws UnsupportedEncodingException,
            IOException {
        String str = "test_string";
        byte[] bytes = encryptHMAC(str,"test_key");
        String data = byte2hex(bytes);
        System.out.println(data);
    }
}

java的输出结果

引用

3FD9B6B4901DAF25BFB9DAA0718B3698

补充一下：

如果不用secret key直接MD5的话，调用下面ruby代码即可。

Digest::MD5.hexdigest('test_string').upcase
 => "3474851A3410906697EC77337DF7AAE4" 

MD5方面的库还是比较多的，Openssl里面也有