* ------Waspmote AES_01 Encryption 128 ECB PKCS --------
* This example shows how to encrypt plain text using:
* 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/>.
* Implementation: Alvaro Gonzalez, Yuri Carmona
// Define a 16-Byte (AES-128) private key to encrypt message
char password[] = "libeliumlibelium";
// original message on which the algorithm will be applied
char message[] = "This_is_a_message";
// Variable for encrypted message's length
uint16_t encrypted_length;
// Declaration of variable encrypted message
uint8_t encrypted_message[300];
USB.println(F("AES_01 example:"));
USB.println(F("- 128-bit Key Size"));
USB.println(F("- ECB Cipher Mode"));
USB.println(F("- PKCS5 padding"));
USB.print(F("\nOriginal message:"));
USB.print(F("Original length:"));
USB.println((int)strlen(message));
////////////////////////////////////////////////////////////////
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USB.println(F("1. Encrypt message"));
// 1.1. Calculate length in Bytes of the encrypted message
encrypted_length = AES.sizeOfBlocks(message);
// 1.2. Calculate encrypted message with ECB cipher mode and PKCS5 padding.
// 1.3. Printing encrypted message
USB.print(F("AES Encrypted message:"));
AES.printMessage( encrypted_message, encrypted_length);
// 1.4. Printing encrypted message's length
USB.print(F("AES Encrypted length:"));
USB.println( (int)encrypted_length);
USB.println(F("***********************"));