AES 07: AES 128, EBC, ZEROS with Frame
This example shows how to encrypt a Waspmote Frame to be sent to Meshlium: - AES algorithm - 128-bit key size - ZEROS Padding - ECB Cipher Mode

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 AES_07 Encryption 128 ECB PKCS --------
*
* This example shows how to encrypt a Waspmote Frame to be sent to Meshlium:
* - AES algorithm
* - 128-bit key size
* - ZEROS Padding
* - ECB Cipher Mode
*
* 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 Gascon
* Implementation: Yuri Carmona
*/
#include "WaspAES.h"
#include "WaspFrame.h"
#include "WaspXBee802.h"
// Define private key to encrypt message
char nodeID[] = "node_001";
// Define a 16-Byte (AES-128) private key to encrypt message
char password[] = "libeliumlibelium";
// XBee packet structure
packetXBee packet;
// Destination MAC address
char MESHLIUM_ADDRESS[]="0013A2004052414C";
void setup()
{
// init USB port
USB.ON();
USB.println(F("AES_07 example:"));
USB.println();
// init RTC
RTC.ON();
// init ACC
ACC.ON();
// set the node ID
frame.setID(nodeID);
}
void loop()
{
////////////////////////////////////////////////
// 1. Create a new Frame with sensor fields
////////////////////////////////////////////////
USB.println(F("1. Creating an ASCII frame"));
RTC.ON();
// Set correct frame size depending on the networking protocol
// In this case:
// -> XBee-802.15.4 module
// -> Unicast 64Byte addressing (MAC address)
// -> Link Encryption is disabled (HW encryption)
// -> AES Encryption is enabled (SW encryption)
frame.setFrameSize(XBEE_802_15_4, UNICAST_64B, DISABLED, ENABLED);
// get maximum frame size
USB.print(F("Maximum Frame Size:"));
USB.println(frame.getFrameSize(),DEC);
// Create new frame (ASCII)
frame.createFrame(BINARY);
// set frame fields (Battery sensor - uint8_t)
frame.addSensor(SENSOR_BAT, (uint8_t) PWR.getBatteryLevel());
// set frame fields (Temperature in Celsius sensor - float)
frame.addSensor(SENSOR_IN_TEMP, (float) RTC.getTemperature());
// set frame fields
frame.addSensor(SENSOR_ACC, ACC.getX(), ACC.getY(), ACC.getZ() );
// Show the original frame via USB port
frame.showFrame();
USB.println();
////////////////////////////////////////////////
// 2. Create Frame with Encrypted contents
////////////////////////////////////////////////
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();
////////////////////////////////////////////////
// 3. Send Frame with encrypted contents to Meshlium
////////////////////////////////////////////////
// init XBee
xbee802.ON();
// clear packet structure
memset( &packet, 0x00, sizeof(packet) );
// Choose transmission mode: UNICAST or BROADCAST
packet.mode = UNICAST;
// set destination XBee parameters to packet
xbee802.setDestinationParams( &packet, MESHLIUM_ADDRESS, frame.buffer, frame.length );
// send XBee packet
xbee802.sendXBee(&packet);
// check TX flag
if( xbee802.error_TX == 0 )
{
USB.println(F("sending ok"));
}
else
{
USB.println(F("sending error"));
}
USB.println(F("*****************************"));
// wait for five seconds
delay(5000);
}

Output

H#
AES_07 example:
1. Creating an ASCII frame
Maximum Frame Size:80
===============================
Current BINARY Frame:
Length: 33
Frame Type: 0
frame (HEX): 3C3D3E001CC00E15176E6F64655F303031230034193E0000CC413F2000CCFF0B04
frame (STR): <=> Ànode_001#4>ÌA?Ìÿ 
===============================
2. Encrypting Frame
===============================
Current ENCRYPTED Frame:
Length: 66
Frame Type: 97
frame (HEX): 3C3D3E613DC00E15176E6F64655F3030312390DB2A02110CDB28F8ECBCCF599F086634A7D0403682E447287C29AD0827838C7A48B1090D5A337D7638215D732EF3A7
frame (STR): <=>a=Ànode_001#Û* Û(øì¼ÏYŸf4§Ð@6‚äG(|)­'ƒŒzH± Z3}v8!]s.ó§
===============================
sending ok
*****************************
Last modified 2yr ago
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