playfair_cipher

Implementation of the PlayFair cipher - nothing special, nothing useful, just for fun.

Do not use them to crypt data of any value, since both of them are pre computer ciphers and so today very vulnerable.

Encrypt

use playfair_cipher::{playfair::PlayFairKey, errors::CharNotInKeyError};
use crate::playfair_cipher::playfair::Cypher;

let pfc = PlayFairKey::new("playfair example");
match pfc.encrypt("hide the gold in the tree stump") {
  Ok(crypt) => {
    assert_eq!(crypt, "BMODZBXDNABEKUDMUIXMMOUVIF");
  }
  Err(e) => panic!("CharNotInKeyError {}", e),
};

Decrypt

use playfair_cipher::playfair::PlayFairKey as PlayFairKey;
use playfair_cipher::errors::CharNotInKeyError as CharNotInKeyError;
use crate::playfair_cipher::playfair::Cypher;

let pfc = PlayFairKey::new("playfair example");
match pfc.decrypt("BMODZBXDNABEKUDMUIXMMOUVIF") {
  Ok(crypt) => {
    assert_eq!(crypt, "HIDETHEGOLDINTHETREXESTUMP");
  }
  Err(e) => panic!("CharNotInKeyError {}", e),
}; 

four_square_ciper

Implementation of the PlayFair cipher - nothing special, nothing useful, just for fun.

Encrypt

use playfair_cipher::{four_square::FourSquare, errors::CharNotInKeyError};
use crate::playfair_cipher::playfair::Cypher;

let fsq = FourSquare::new("EXAMPLE", "KEYWORD");
match fsq.encrypt("joe") {
  Ok(crypt) => {
    assert_eq!(crypt, "DIAZ");
  }
  Err(e) => panic!("CharNotInKeyError {}", e),
};

Decrypt

use playfair_cipher::{four_square::FourSquare, errors::CharNotInKeyError};
use crate::playfair_cipher::playfair::Cypher;

let fsq = FourSquare::new("EXAMPLE", "KEYWORD");
match fsq.decrypt("DIAZ") {
  Ok(crypt) => {
    assert_eq!(crypt, "IOEX");
  }
  Err(e) => panic!("CharNotInKeyError {}", e),
};

That's it.