AES 0.5.0

C++ interface simple for AES encryption and decryption. Designed both as useful AES tolbox for production and efficient research tool for cryptanalysis

Featuring

• Block encrypt and decrypt tools for AES 126, 192 and 256 bits.
• Scallable block : change block size parameter
• Highly customizable : code structure designed to easily implement new/different operations
• High level code structure using NAlgebra module from MathToolKitCPP

Install

• Clone the project
• Copy the AESHandler directory in the project you wanto import

Getting Started

The module performs AES operations using a AESHandler object which carries both the atom operations such as ShiftRows and the API. The AESHandler stores the key and message block as matrices.

Encryption

To perform encryption of a block few lines are required :

• Instantiate a plain text and key matrix :

mat_aes_t plain{
                  {0x00, 0x44, 0x88, 0xcc},
                  {0x11, 0x55, 0x99, 0xdd},
                  {0x22, 0x66, 0xaa, 0xee},
                  {0x33, 0x77, 0xbb, 0xff}
                };


mat_aes_t key{ 
                {0x00, 0x04, 0x08, 0x0c},
                {0x01, 0x05, 0x09, 0x0d},
                {0x02, 0x06, 0x0a, 0x0e},
                {0x03, 0x07, 0x0b, 0x0f}
              };

• Instantiate a handler and call encrypt() method :

AESHandler hander{};
mat_aes_t cipher = handler.encrypt(plain, key);

Decryption

Decryption is performed exactly the same way as encryption but us decrypt() method instead of encrypt().