Function decrypt

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

Decrypts a string using the rail fence cipher.

Arguments

• input - The string to decrypt
• key - The number of rails used to encrypt the string

Example

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

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