Development v12

Warning - Product Update

All the resources present on this section belong to Waspmote v12, Waspmote Plug & Sense! v12 and Meshlium v3.8.

If you have a Waspmote v15, Waspmote Plug & Sense! v15 or Meshlium v4.0 please go to the new Development Section.

Check what is your version and what are the differences between the old and the new one in this document.

» HASH 01: MD5

This example shows how to calculate MD5 message digest to provide INTEGRITY to the sending of information. Both data must be sent over the network: MESSAGE + HASH_MESSAGE

Required Materials

1 x Waspmote
1 x Battery

Notes

- The battery has to be connected.
- This example can be executed in Waspmote v12 and Waspmote v15

Code

/*
 *  ------Waspmote HASH_01 MD5 Message Digest--------
 *
 *  This example shows how to calculate MD5 message digest to
 *  provide INTEGRITY to the sending of information. Both data
 *  must be sent over the network: MESSAGE + HASH_MESSAGE
 *
 *  
 *  Copyright (C) 2016 Libelium Comunicaciones Distribuidas S.L.
 *  http://www.libelium.com
 *
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 2 of the License, or
 *  (at your option) any later version.
 * 
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 * 
 *  You should have received a copy of the GNU General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 *  Version:                3.0
 *  Design:                 David Gascón
 *  Implementation:         Alvaro Gonzalez, Yuri Carmona
 */

#include "WaspHash.h"

// Original message
char message[] = "Libelium";

// Variable to store the hash message
uint8_t hash_message_md5[16];
  
  
void setup()
{
  USB.ON();
  USB.println(F("HASH_01 example"));
  USB.println();
}


void loop()
{	 

  USB.print(F("Original message: "));
  USB.println(message);
  
  // Calculate hash of original message with MD5 Algorithm  
  HASH.md5( hash_message_md5, (uint8_t*)message, strlen(message)*8); 
 
  // Printing message digest MD5  
  USB.println(F("The message digest created for the original message is: "));
  HASH.printMessageDigest("MD5:", hash_message_md5 , 16); 

  delay(5000);
  USB.println();
  USB.println(F("*******************"));
}

Output

H#
HASH_01 example

Original message: Libelium
The message digest created for the original message is:
MD5:"D1954FB5A0452809755D28EA75AC6E85"

Quick Publish: