Module lea::ctr

LEA-128/192/256-CTR implementation

• Examples

Encryption

use lea::ctr::Lea256Ctr;
use lea::stream_cipher::{NewStreamCipher, StreamCipher};
use lea::generic_array::arr;
use lea::generic_array::arr_impl;

let key = arr![u8; 0x0F, 0x1E, 0x2D, 0x3C, 0x4B, 0x5A, 0x69, 0x78, 0x87, 0x96, 0xA5, 0xB4, 0xC3, 0xD2, 0xE1, 0xF0,
                   0xF0, 0xE1, 0xD2, 0xC3, 0xB4, 0xA5, 0x96, 0x87, 0x78, 0x69, 0x5A, 0x4B, 0x3C, 0x2D, 0x1E, 0x0F];
let counter = arr![u8; 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, 0x10];
let mut lea256ctr = Lea256Ctr::new(&key, &counter);

let mut data = arr![u8; 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F, 
                        0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x2B, 0x2C, 0x2D, 0x2E, 0x2F,
                        0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3A, 0x3B, 0x3C, 0x3D, 0x3E, 0x3F];

lea256ctr.encrypt(&mut data);

let cipher = arr![u8; 0x15, 0x39, 0xF7, 0xA2, 0x1C, 0x0F, 0x16, 0x07, 0x6D, 0x90, 0xFB, 0xEB, 0x03, 0x97, 0xD4, 0x40,
                      0x2D, 0xFD, 0x4E, 0xB0, 0x44, 0x0B, 0x28, 0x3D, 0xE7, 0xE3, 0x0C, 0x36, 0x0D, 0x71, 0xF1, 0x47,
                      0x0E, 0x8B, 0xAF, 0xD2, 0x88, 0x3B, 0xA8, 0x08, 0x8D, 0x0C, 0x5D, 0xA7, 0xA9, 0x14, 0xAE, 0x90];

assert_eq!(data, cipher);

Decryption

use lea::ctr::Lea256Ctr;
use lea::stream_cipher::{NewStreamCipher, StreamCipher};
use lea::generic_array::arr;
use lea::generic_array::arr_impl;

let key = arr![u8; 0x0F, 0x1E, 0x2D, 0x3C, 0x4B, 0x5A, 0x69, 0x78, 0x87, 0x96, 0xA5, 0xB4, 0xC3, 0xD2, 0xE1, 0xF0,
                   0xF0, 0xE1, 0xD2, 0xC3, 0xB4, 0xA5, 0x96, 0x87, 0x78, 0x69, 0x5A, 0x4B, 0x3C, 0x2D, 0x1E, 0x0F];
let counter = arr![u8; 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, 0x10];
let mut lea256ctr = Lea256Ctr::new(&key, &counter);

let mut data = arr![u8; 0x15, 0x39, 0xF7, 0xA2, 0x1C, 0x0F, 0x16, 0x07, 0x6D, 0x90, 0xFB, 0xEB, 0x03, 0x97, 0xD4, 0x40,
                        0x2D, 0xFD, 0x4E, 0xB0, 0x44, 0x0B, 0x28, 0x3D, 0xE7, 0xE3, 0x0C, 0x36, 0x0D, 0x71, 0xF1, 0x47,
                        0x0E, 0x8B, 0xAF, 0xD2, 0x88, 0x3B, 0xA8, 0x08, 0x8D, 0x0C, 0x5D, 0xA7, 0xA9, 0x14, 0xAE, 0x90];

lea256ctr.decrypt(&mut data);

let plain = arr![u8; 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F, 
                     0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x2B, 0x2C, 0x2D, 0x2E, 0x2F,
                     0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3A, 0x3B, 0x3C, 0x3D, 0x3E, 0x3F];

assert_eq!(data, plain);

Structs

Lea128Ctr
Lea192Ctr
Lea256Ctr