AES Implementation in Julia

This package implements the Advanced Encryption Standard (AES) cipher in Julia. 128-bit, 192-bit, and 256-bit keys are supported.

This package supports AES with the following block cipher modes of operation:

• ECB (Electronic codebook)
• CBC (Cipher-block chaining)
• CFB (Cipher feedback)
• OFB (Output feedback)
• CTR (Counter)

Note that the implementation is not optimized with respect to performance or resistance to attacks including timing attacks. Therefore, this package is not recommended for production use.

Installation and Usage

With a Copy of this Repository

If you have a copy of this repository checked out on your computer, do the following:

• cd /path/to/this/repo in a terminal.
• Run julia to open the Julia shell.
• Press ] to switch to the pkg environment.
• Run activate . to activate an environment with this package.
• Press backspace to return to the Julia shell where you can run Julia commands using this package.

Without a Copy of this Repository

If you don't have this repository checked out on your computer, do the following:

• In a terminal, cd to a directory in which you want to run your programs.
• Run julia to open the Julia shell.
• Press ] to switch to the pkg environment.
• Run add with the URL of this repository as the only parameter.
• Press backspace to return to the Julia shell where you can run Julia commands using this package.

Usage Example

The following code shows how to use AES in OFB mode for encryption.

using AES
key = rand(UInt8, div(256, 8))
iv = rand(UInt8, 16)
plaintext = rand(UInt8, 3 * 16)
AESOFB(plaintext, key, iv)

More examples can be found in test/runtests.jl.

Tests

• In a terminal, use cd to navigate to the test directory of this repository.
• Run julia runtests.jl for the default test suite.
• Run julia runnist.jl for the NIST test suite.

Contact

Feel free to report any bugs as issues on GitHub. Pull requests are always welcome.