AES (Advanced Encryption Standard) Symmetric Block Cipher

AES is a symmetric block cipher. It is symmetric because it uses the same key to encrypt and decrypt, and is a block cipher because it operates on individual, independent blocks of data. It is typically used for encryption and decryption.

Usage

Encryption

Full, end-to-end encryption of plaintext to ciphertext.

$ cat aes.key
-my-16-byte-key-
$ echo 'Hello, world!' | tiber --output-hex encrypt --key aes.key
b1a4cd8fc4d3544b5c51623be45f1fc9

Decryption

Full, end-to-end decryption of ciphertext to plaintext.

$ echo 'b1a4cd8fc4d3544b5c51623be45f1fc9' | tiber --input-hex decrypt --key aes.key
Hello, world!

Individual Steps

Apply a particular step of the AES algorithm: one of sub-bytes, shift-rows, mix-columns, or add-round-key.

$ echo 'Hello, world!' | tiber shift-rows
H,l or lo lw!e d

Web Interface

The cipher can be interacted with through a web interface, by running the following command and opening localhost:8080.

$ docker run -p 8080:80 benmandrew/tiber

Build

$ make

Documentation

Code docs are located online at benmandrew.com/docs/tiber/tiber/, or can be generated locally with

$ cargo doc --no-deps --open

Fuzzing

Fuzz test inputs to the cipher with

$ docker run benmandrew/tiber:fuzz

Each input is encrypted and decrypted to check idempotence, and the binary is built with ASan to detect memory errors.