Solve challenge 7 using openssl.
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@ -6,3 +6,4 @@ edition = "2021"
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# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
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[dependencies]
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openssl = ">= 0.10.38"
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@ -0,0 +1,64 @@
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@ -9,4 +9,5 @@ fn main() {
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set1::challenge4();
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set1::challenge5();
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set1::challenge6();
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set1::challenge7();
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}
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27
src/set1.rs
27
src/set1.rs
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@ -1,6 +1,7 @@
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#![allow(dead_code)]
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use crate::bytes::Bytes;
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use crate::bytes_base64::BytesBase64;
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use openssl::symm::{decrypt, Cipher};
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use std::io::{BufRead, BufReader, Write};
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use std::str;
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@ -148,11 +149,25 @@ pub fn challenge6() {
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let key_size = guess_key_size(&bytes);
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let bytes_tranposed = transpose(&bytes, key_size);
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let key = Bytes(bytes_tranposed.iter().map(|b| guess_key(&b)).collect());
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let msg = Bytes::xor_cycle(&bytes, &key);
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let msg = Bytes::xor_cycle(&bytes, &key).to_utf8();
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let partial_msg = Bytes(msg.0[..20].to_vec()).to_utf8();
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println!(
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"[okay] Challenge 6: size={} msg={}...",
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key_size, partial_msg
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);
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let partial_msg = msg[..20].to_string();
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println!("[okay] Challenge 6: {}...", partial_msg);
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}
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pub fn challenge7() {
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fn read(path: &str) -> Bytes {
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let s = std::fs::read_to_string(path).unwrap();
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BytesBase64::from_base64(&s).to_bytes()
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}
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let ciphertext = &read("data/7.txt").0;
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let key = b"YELLOW SUBMARINE";
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let cipher = Cipher::aes_128_ecb();
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let data = decrypt(cipher, key, None, ciphertext);
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let result = match data {
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Ok(data) => Bytes(data).to_utf8(),
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Err(err) => err.to_string(),
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};
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let partial_msg = result[..20].to_string();
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println!("[okay] Challenge 7: {}...", partial_msg);
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}
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