33 lines
1.2 KiB
Rust
33 lines
1.2 KiB
Rust
const LEFT_ALPHABET_CT: &str = "HXUCZVAMDSLKPEFJRIGTWOBNYQ";
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const RIGHT_ALPHABET_PT: &str = "PTLNBQDEOYSFAVZKGJRIHWXUMC";
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const ZENITH: usize = 0;
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const NADIR: usize = 12;
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const SEQUENCE: &str = "WELLDONEISBETTERTHANWELLSAID";
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fn cipher(letter: &char, left: &String, right: &String) -> (usize, char) {
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let pos = right.find(*letter).unwrap();
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let cipher = left.chars().nth(pos).unwrap();
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(pos, cipher)
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}
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fn main() {
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let mut left = LEFT_ALPHABET_CT.to_string();
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let mut right = RIGHT_ALPHABET_PT.to_string();
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let ciphertext = SEQUENCE.chars()
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.map(|letter| {
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let (pos, cipher_char) = cipher(&letter, &left, &right);
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left = format!("{}{}", &left[pos..], &left[..pos]);
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left = format!("{}{}{}{}", &left[ZENITH..1], &left[2..NADIR+2], &left[1..2], &left[NADIR+2..]);
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if pos != right.len() - 1 {
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right = format!("{}{}", &right[pos + 1..], &right[..pos + 1]);
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}
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right = format!("{}{}{}{}", &right[ZENITH..2], &right[3..NADIR+2], &right[2..3], &right[NADIR+2..]);
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cipher_char
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})
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.collect::<String>();
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println!("Plaintext: {}", SEQUENCE);
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println!("Ciphertext: {}", ciphertext);
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}
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