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AES Encryption

128-bit AES Encryption (Rijndael cipher) implemented using x86 assembly.

Dependancies

All you need is make and nasm.

Install them using your package manager.

Ubuntu and its derivatives

# apt-get update && apt install nasm make

Arch Linux

# pacman -S nasm make

Steps to run

  • Clone this repo.
  • Run make to build the and link the program.
  • Run the executable using ./AES-Encryption.
  • You can also run the executable as a server. To do so, run the executable with the port as an argument.
    • ./AES-Encryption 9001
    • This feature is a WIP.

How to use

The program has 2 modes, encryption and decryption.

  • When encrypting, you just need to give it the key and the message as 16 byte long ascii strings.

    • You will get the encrypted message as a 4x4 matrix.

    • Ex:

      0x4C 0x46 0x9F 0xB6

      0x2D 0x7A 0x9B 0x90

      0xB7 0xDF 0xFC 0xB3

      0x28 0xA5 0x15 0x3A

  • When decrypting, you have to give it the 16 bytes you were given as the encrypted message and the key. The encrypted message is give as 16 2-digit hex bytes, using lowercase characters for a-f.

More info on AES