How to implement HMacMD5 encryption algorithm in Python

This time I will bring you PythonHow to implement the HMacMD5 encryption algorithm, what are the precautions for implementing the HMacMD5 encryption algorithm in Python, the following is a practical case, let's take a look.

The example in this article describes the HMacMD5 encryption algorithm implemented in Python. Share it with everyone for your reference, the details are as follows:

What is HMAC-MD5?

1. For example, you share a key K with the other party. Now you want to send a message to the other party. You must not only ensure that the message has not been tampered with, but also prove that the message is indeed yours. If sent, then the original information and the HMAC value calculated using K are sent together. After the other party receives it, he uses the K in his hand to calculate the HMAC of the message. If it is consistent with the HMAC you sent, then it can be considered that the message has not been tampered with or impersonated.

2. MD5 digests the data to be output through hashing. When the data is received, MD5 hashing is performed in the same way. When compared with the given MD5 hash value, it will be clear if it is consistent and inconsistent. Generally speaking, the transmitted data and MD5 are given through different channels. For example, MD5 is displayed on the web page and the download link is from a mirror website. If you want to send data and hash values ​​through the same channel (such as message authentication code), you must consider the problem of data and MD5 being tampered with at the same time. If a third party modifies the data, then perform MD5 hashing and send it to the recipient together. The receiving party cannot detect that the data has been tampered with. HMAC-MD5 can be calculated using a key shared by both the sender and the receiver, and a third party without this key cannot calculate the correct hash value, thus preventing data from being tampered with.

Python version:

#coding:utf-8
import sys
reload(sys)
sys.setdefaultencoding('utf-8')
import hmac
import hashlib
####################设置Key值##############
ekey = 'laidefa'
###############输入数据############
to_enc = '{"name":"zhangsan"}'
enc_res = hmac.new(ekey, to_enc, hashlib.md5).hexdigest()
print enc_res

Output result:

"D:\Program Files\Python27\python .exe" D:/PycharmProjects/learn2017/hmacmd5.py
2cbb94ce78b35e4030851c4d40dacf12
Process finished with exit code 0

java version:

package tom;
import java.security.MessageDigest;
import javax.crypto.KeyGenerator;
import javax.crypto.Mac;
import javax.crypto.SecretKey;
import javax.crypto.spec.SecretKeySpec;
/**
* 基础加密组件
* @version 1.0
*/
public class Hmacmd5 {
  /**
   * MAC算法可选以下多种算法
   *
   * <pre class="brush:php;toolbar:false">
   * HmacMD5
   * HmacSHA1
   * HmacSHA256
   * HmacSHA384
   * HmacSHA512
   * 

   */   public static final String KEY_MAC = "HmacMD5";   /**    * HMAC加密    *    * @param data    * @param key    * @return    * @throws Exception    */   public static byte[] encryptHMAC(byte[] data, String key) throws Exception {     SecretKey secretKey = new SecretKeySpec(key.getBytes(), KEY_MAC);     Mac mac = Mac.getInstance(secretKey.getAlgorithm());     mac.init(secretKey);     return mac.doFinal(data);   }   /*byte数组转换为HexString*/   public static String byteArrayToHexString(byte[] b) {     StringBuffer sb = new StringBuffer(b.length * 2);     for (int i = 0; i < b.length; i++) {      int v = b[i] & 0xff;      if (v < 16) {       sb.append('0');      }      sb.append(Integer.toHexString(v));     }     return sb.toString();    }   public static void main(String[] args)throws Exception{     String inputStr = "{\"name\":\"zhangsan\"}";     byte[] inputData = inputStr.getBytes();     String key = "laidefa";     System.out.println(Hmacmd5.byteArrayToHexString(Hmacmd5.encryptHMAC(inputData, key)));   } }

Output result:

2cbb94ce78b35e4030851c4d40dacf12

##I believe you have mastered the case after reading this article Method, for more exciting information, please pay attention to other related articles on the php Chinese website!

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