49 lines
1.4 KiB
Rust
49 lines
1.4 KiB
Rust
use hex::{AsHexBytes, HexDigest};
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#[derive(Debug)]
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pub enum FixedXORError {
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Bad,
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}
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pub fn fixed(a: &str, b: &str) -> Result<String, FixedXORError> {
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let a_decoded = a.hex_bytes().valid();
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let b_decoded = b.hex_bytes().valid();
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let xor: Vec<u8> = a_decoded.zip(b_decoded).map(|(x, y)| x ^ y).collect();
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Ok(xor.hex_digest())
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}
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#[cfg(test)]
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mod tests {
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use hex::AsHexBytes;
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use std::char;
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use super::fixed;
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#[test]
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fn cryptopals() {
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let a = "1c0111001f010100061a024b53535009181c";
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let b = "686974207468652062756c6c277320657965";
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let ex_output = "746865206b696420646f6e277420706c6179";
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let output = fixed(a, b);
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assert_eq!(output.unwrap(), ex_output);
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}
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static ENGLISH_LETTER_FREQ: &'static str = "EARIOTNSLCUDPMHGBFYWKVXZJQ";
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fn letter_freq_score(input: &str) -> f32 {
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let mut score: f32 = 0.0;
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score
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}
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#[test]
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fn cryptopals13() {
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let input = "1b37373331363f78151b7f2b783431333d78397828372d363c78373e783a393b3736";
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for key in 32u32..127 {
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let possible_output = input.hex_bytes().valid()
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.map(|c| char::from_u32(c as u32 ^ key))
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.take_while(|c| c.is_some())
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.map(|c| c.unwrap())
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.collect::<String>();
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println!("{}: {}", key, possible_output);
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}
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}
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}
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