Struct FourSquare

pub struct FourSquare { /* private fields */ }

A Four-Square cipher implementation.

Implementations

impl FourSquare

pub fn new(key1: &str, key2: &str, alphabet: &str, pad: char) -> Self

Takes the two keys for the Four-Square cipher and returns a corresponding FourSquare struct.

Panics

• If alphabet is not 25 chars in length.
• If alphabet is not valid ascii.
• If alphabet contains repeated chars.
• If key1 is not 25 chars in length.
• If key1 contains repeated chars.
• If any of the chars in key1 are not contained in alphabet.
• If key2 is not 25 chars in length.
• If key2 contains repeated chars.
• If any of the chars in key2 are not contained in alphabet.
• If pad is not contained in alphabet.

Trait Implementations

impl Cipher for FourSquare

fn encipher(&self, ptext: &str) -> CipherResult

Enciphers the given plaintext (a str reference) using the Four-Square cipher and returns the ciphertext as a CipherResult.

Example

use ciphers::{Cipher, FourSquare};

let four_square = FourSquare::new(
    "ZGPTFOIHMUWDRCNYKEQAXVSBL",
    "MFNBDCRHSAXYOGVITUEWLQZKP",
    "ABCDEFGHIKLMNOPQRSTUVWXYZ",
    'X',
);

let ctext = four_square.encipher("ATTACKATDAWN");
assert_eq!(ctext.unwrap(), "TIYBFHTIZBSY");

fn decipher(&self, ctext: &str) -> CipherResult

Deciphers the given ciphertext (a str reference) using the Four-Square cipher and returns the plaintext as a CipherResult.

Example

use ciphers::{Cipher, FourSquare};

let four_square = FourSquare::new(
    "ZGPTFOIHMUWDRCNYKEQAXVSBL",
    "MFNBDCRHSAXYOGVITUEWLQZKP",
    "ABCDEFGHIKLMNOPQRSTUVWXYZ",
    'X',
);

let ptext = four_square.decipher("TIYBFHTIZBSY");
assert_eq!(ptext.unwrap(), "ATTACKATDAWN");