Function encrypt

pub fn encrypt(input: &str, key: i32) -> Result<String, &'static str>

Encrypts a string using the rail fence cipher.

Arguments

• input - The string to encrypt
• key - The number of rails to use

Example

use rail_fence_cipher::encrypt;
 
let plaintext = String::from("Hello, world!");
let ciphertext = encrypt(&plaintext, 4).unwrap();
 
assert_eq!(ciphertext, "H !e,wdloollr");

Errors

• Input must not be empty - If the input string is empty

• Key must be greater than 0 - If the key is less than 1

• Error in fence creation - If there is an error in the fence creation