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.

» Frame 07: Encrypted Frames

This example shows how to encrypt a Waspmote Frame using the Encryption libraries. In this example AES-128 is used. But AES-192 and AES-256 are available too. Regarding the Block Cipher mode, only ECB is supported. And regarding the padding mode: only ZEROS padding is supported. The result for encryption function is stored in 'frame.buffer' and 'frame.length'

Required Materials

1 x Waspmote
1 x MiniUSB wire
1 x Battery

Notes

- Regarding the Block Cipher mode, only ECB is supported.
- Regarding the padding mode: only ZEROS padding is supported.
- This example can be executed in Waspmote v12 and Waspmote v15

Code

/*  
 *  ------ FRAME_07 - encrypt Frame -------- 
 *  
 *  Explanation: This example shows how to encrypt a 
 *  Waspmote Frame using the Encryption libraries. In this example
 *  AES-128 is used. But AES-192 and AES-256 are available too. 
 *  Regarding the Block Cipher mode, only ECB is supported. And 
 *  regarding the padding mode: only ZEROS padding is supported
 *  The result for encryption function is stored in 
 *  'frame.buffer' and 'frame.length'
 *
 *  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 3 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:    Yuri Carmona
 */

#include <WaspFrame.h>
#include <WaspAES.h>

// define the Waspmote ID 
char moteID[] = "node_01";

// Define private 16-Byte key to encrypt message  
char password[] = "libeliumlibelium"; 


  
void setup()
{
  // Init USB port & Accelerometer
  USB.ON();    
  USB.println(F("FRAME_07 example")); 
  
  // set RTC on
  RTC.ON();
  
  // set the Waspmote ID
  frame.setID(moteID);  
}


void loop()
{
  /////////////////////////////////////////////
  // 1. create a new Frame
  /////////////////////////////////////////////
  USB.println(F("1. Creating an ASCII frame"));
  
  // Create new frame (ASCII)
  frame.createFrame(ASCII);
  USB.println(F("new Waspmote Frame created"));
  
  // set frame fields (Battery sensor - uint8_t)
  frame.addSensor(SENSOR_BAT, (uint8_t) PWR.getBatteryLevel());
  USB.println(F("Battery Level added"));
  
  // set frame fields (Temperature in Celsius sensor - float)
  frame.addSensor(SENSOR_IN_TEMP, (float) RTC.getTemperature());
  USB.println(F("RTC temperature added"));

  // Prints frame
  frame.showFrame();
  USB.println();
  
  delay(2000);
    
    
  ////////////////////////////////////////////////
  // 2. Encrypt Waspmote Frame
  ////////////////////////////////////////////////  
  USB.println(F("2. Encrypting Frame"));   

  /* Calculate encrypted message with ECB cipher mode and ZEROS padding
   The Encryption options are:
   - AES_128
   - AES_192
   - AES_256
   */
  frame.encryptFrame( AES_128, password ); 

  // Show the Encrypted frame via USB port
  frame.showFrame();
  USB.println();  
      
  USB.println(F("*****************************"));
  delay(5000);

}

Output

H#
FRAME_07 example
1. Creating an ASCII frame
new Waspmote Frame created
Battery Level added
RTC temperature added
===============================
Current ASCII Frame:
Length: 47
Frame Type: 128
frame (HEX): 3C3D3E800223333837323634353339236E6F64655F30312330234241543A373823494E5F54454D503A32352E353023
frame (STR): <=>€#387264539#node_01#0#BAT:78#IN_TEMP:25.50#
===============================

2. Encrypting Frame
===============================
Current ENCRYPTED Frame:
Length: 65
Frame Type: 97
frame (HEX): 3C3D3E613C1B3015176E6F64655F30312362E6A8D022275CCDD35ED2E4A04E945025DAAAE1423AA4D89BA92DE9FE808DB1E418251A2B848757F1E2767E227C4907
frame (STR): <=>a<0node_01#bæ¨Ð"'\ÍÓ^Òä N”P%ÚªáB:¤Ø›©-éþ€±ä%+„‡Wñâv~"|I
===============================
...

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