Struct ciphers::Substitution

pub struct Substitution { /* fields omitted */ }

A Simple Substitution cipher implementation.

Methods

impl Substitution

pub fn new(key: &str) -> Self

Takes the key for the Simple Substitution cipher and returns a corresponding Substitution struct.

Panics

• If key is not 26 chars in length.
• If key is not alphabetic.
• If key contains repeated chars.

Trait Implementations

impl Cipher for Substitution

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

Enciphers the given plaintext (a str reference) using the Simple Substitution cipher and returns the ciphertext as a CipherResult.

Example

use ciphers::{Cipher, Substitution};

let substitution = Substitution::new("PHQGIUMEAYLNOFDXJKRCVSTZWB");

let ctext = substitution.encipher("DEFENDTHEEASTWALLOFTHECASTLE");
assert_eq!(ctext.unwrap(), "GIUIFGCEIIPRCTPNNDUCEIQPRCNI");

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

Deciphers the given ciphertext (a str reference) using the Simple Substitution cipher and returns the plaintext as a CipherResult.

Example

use ciphers::{Cipher, Substitution};

let substitution = Substitution::new("PHQGIUMEAYLNOFDXJKRCVSTZWB");

let ptext = substitution.decipher("GIUIFGCEIIPRCTPNNDUCEIQPRCNI");
assert_eq!(ptext.unwrap(), "DEFENDTHEEASTWALLOFTHECASTLE");