move common stuff to common crate

This commit is contained in:
Thomas Lindner 2023-12-16 21:46:14 +01:00
parent 8476e7f6b1
commit 41581053dd
12 changed files with 323 additions and 133 deletions

291
Cargo.lock generated
View file

@ -4,58 +4,96 @@ version = 3
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@ -65,13 +103,10 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
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@ -81,31 +116,38 @@ checksum = "b5e6163cb8c49088c2c36f57875e58ccd8c87c7427f7fbd50ea6710b2f3f2e8f"
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[[package]] [[package]]
name = "xor_cipher" name = "xor_cipher"
version = "0.1.0" version = "0.1.0"
dependencies = [ dependencies = [
"common",
"env_logger", "env_logger",
"log 0.3.9", "log",
"rustc-serialize", "rustc-serialize",
] ]

View file

@ -1,8 +1,10 @@
[workspace] [workspace]
members = [ members = [
"common",
"set1/challenge1_hex2base64", "set1/challenge1_hex2base64",
"set1/challenge2_fixed_xor", "set1/challenge2_fixed_xor",
"set1/challenge3_xor_cipher", "set1/challenge3_xor_cipher",
"set1/challenge4_detect_xor", "set1/challenge4_detect_xor",
] ]
resolver = "2"

7
common/Cargo.toml Normal file
View file

@ -0,0 +1,7 @@
[package]
name = "common"
version = "0.1.0"
edition = "2021"
authors = ["Thomas Lindner <tom@dl6tom.de>"]
[dependencies]

37
common/src/lib.rs Normal file
View file

@ -0,0 +1,37 @@
use std::iter::repeat;
pub fn score(plaintext: &Vec<u8>) -> u32 {
let ranking = [24, 7, 15, 17, 26, 11, 10, 19, 22, 4, 5, 16, 13,
21, 23, 8, 2, 18, 20, 25, 14, 6, 12, 3, 9, 1];
let mut score = 0;
for ch in plaintext.iter() {
if ch >= &97 && ch <= &122 {
score += ranking[(ch - 97) as usize];
}
}
score
}
pub fn fixed_xor_cipher(ciphertext: &Vec<u8>, keyiter: &mut dyn Iterator<Item = &u8>) -> Vec<u8> {
ciphertext.iter().zip(keyiter).map(|(c, k)| c ^ k).collect()
}
pub fn xor_cipher(ciphertext: &Vec<u8>, key: u8) -> Vec<u8> {
fixed_xor_cipher(ciphertext, &mut repeat(&key))
}
pub fn break_xor_cipher(ciphertext: &Vec<u8>) -> (Vec<u8>, u32) {
let mut maxscore = 0;
let mut decrypted: Vec<u8> = vec![];
for key in 0..0xff {
let plaintext: Vec<u8> = xor_cipher(&ciphertext, key);
let s = score(&plaintext);
if s > maxscore {
maxscore = s;
decrypted = plaintext;
}
}
(decrypted, maxscore)
}

View file

@ -1,9 +1,10 @@
[package] [package]
name = "hex2base64" name = "hex2base64"
version = "0.1.0" version = "0.1.0"
authors = ["Thomas Lindner <thomas.lindner@fau.de>"] edition = "2021"
authors = ["Thomas Lindner <tom@dl6tom.de>"]
[dependencies] [dependencies]
log = "0.3.6" log = "0.4"
env_logger = "0.3.4" env_logger = "0.10"
rustc-serialize = "0.3" rustc-serialize = "0.3"

View file

@ -1,14 +1,10 @@
#[macro_use] use log::error;
extern crate log;
extern crate env_logger;
extern crate rustc_serialize;
use rustc_serialize::hex::FromHex; use rustc_serialize::hex::FromHex;
use rustc_serialize::base64::{STANDARD, ToBase64}; use rustc_serialize::base64::{STANDARD, ToBase64};
use std::io::{BufRead, stdin}; use std::io::{BufRead, stdin};
fn main() { fn main() {
env_logger::init().unwrap(); env_logger::init();
let stdin = stdin(); let stdin = stdin();
for line in stdin.lock().lines().filter_map(|x| x.ok()) { for line in stdin.lock().lines().filter_map(|x| x.ok()) {

View file

@ -1,9 +1,11 @@
[package] [package]
name = "fixed_xor" name = "fixed_xor"
version = "0.1.0" version = "0.1.0"
authors = ["Thomas Lindner <thomas.lindner@fau.de>"] edition = "2021"
authors = ["Thomas Lindner <tom@dl6tom.de>"]
[dependencies] [dependencies]
log = "0.3.6" common = { path = "../../common" }
env_logger = "0.3.4" log = "0.4"
env_logger = "0.10"
rustc-serialize = "0.3" rustc-serialize = "0.3"

View file

@ -1,8 +1,5 @@
#[macro_use] use common::fixed_xor_cipher;
extern crate log; use log::error;
extern crate env_logger;
extern crate rustc_serialize;
use rustc_serialize::hex::{FromHex, ToHex}; use rustc_serialize::hex::{FromHex, ToHex};
use std::io::{BufRead, stdin}; use std::io::{BufRead, stdin};
@ -21,12 +18,12 @@ impl<T> Iterator for Pairwise<T> where T: Iterator {
} }
fn main() { fn main() {
env_logger::init().unwrap(); env_logger::init();
let stdin = stdin(); let stdin = stdin();
for (line1, line2) in Pairwise(stdin.lock().lines().filter_map(|x| x.ok())) { for (line1, line2) in Pairwise(stdin.lock().lines().filter_map(|x| x.ok())) {
match (line1.from_hex(), line2.from_hex()) { match (line1.from_hex(), line2.from_hex()) {
(Ok(v1), Ok(v2)) => println!("{}", v1.iter().zip(v2).map(|(a, b)| a ^ b).collect::<Vec<u8>>().to_hex()), (Ok(v1), Ok(v2)) => println!("{}", fixed_xor_cipher(&v1, &mut v2.iter()).to_hex()),
(Err(e), _) => error!("{}", e), (Err(e), _) => error!("{}", e),
(_, Err(e)) => error!("{}", e) (_, Err(e)) => error!("{}", e)
} }

View file

@ -1,9 +1,11 @@
[package] [package]
name = "xor_cipher" name = "xor_cipher"
version = "0.1.0" version = "0.1.0"
authors = ["Thomas Lindner <thomas.lindner@fau.de>"] edition = "2021"
authors = ["Thomas Lindner <tom@dl6tom.de>"]
[dependencies] [dependencies]
log = "0.3.6" common = { path = "../../common" }
env_logger = "0.3.4" log = "0.4"
env_logger = "0.10"
rustc-serialize = "0.3" rustc-serialize = "0.3"

View file

@ -1,43 +1,16 @@
#[macro_use] use common::break_xor_cipher;
extern crate log; use log::error;
extern crate env_logger;
extern crate rustc_serialize;
use rustc_serialize::hex::FromHex; use rustc_serialize::hex::FromHex;
use std::io::{BufRead, stdin}; use std::io::{BufRead, stdin};
use std::iter::repeat;
fn score(plaintext: &Vec<u8>) -> u32 {
let ranking = [24, 7, 15, 17, 26, 11, 10, 19, 22, 4, 5, 16, 13,
21, 23, 8, 2, 18, 20, 25, 14, 6, 12, 3, 9, 1];
let mut score = 0;
for ch in plaintext.iter() {
if ch >= &97 && ch <= &122 {
score += ranking[(ch - 97) as usize];
}
}
score
}
fn main() { fn main() {
env_logger::init().unwrap(); env_logger::init();
let stdin = stdin(); let stdin = stdin();
for line in stdin.lock().lines().filter_map(|x| x.ok()) { for line in stdin.lock().lines().filter_map(|x| x.ok()) {
match line.from_hex() { match line.from_hex() {
Ok(ciphertext) => { Ok(ciphertext) => {
let mut maxscore = 0; let (decrypted, _) = break_xor_cipher(&ciphertext);
let mut decrypted: Vec<u8> = vec![];
for key in 0..0xff {
let plaintext: Vec<u8> = ciphertext.iter().zip(repeat(key)).map(|(c, k)| c ^ k).collect();
let s = score(&plaintext);
if s > maxscore {
maxscore = s;
decrypted = plaintext;
}
}
match String::from_utf8(decrypted) { match String::from_utf8(decrypted) {
Ok(s) => println!("{}", s), Ok(s) => println!("{}", s),
Err(e) => error!("{}", e) Err(e) => error!("{}", e)

View file

@ -1,9 +1,11 @@
[package] [package]
name = "detect_xor" name = "detect_xor"
version = "0.1.0" version = "0.1.0"
authors = ["Thomas Lindner <thomas.lindner@fau.de>"] edition = "2021"
authors = ["Thomas Lindner <tom@dl6tom.de>"]
[dependencies] [dependencies]
log = "0.3.6" common = { path = "../../common" }
env_logger = "0.3.4" log = "0.4"
env_logger = "0.10"
rustc-serialize = "0.3" rustc-serialize = "0.3"

View file

@ -1,27 +1,10 @@
#[macro_use] use common::break_xor_cipher;
extern crate log; use log::error;
extern crate env_logger;
extern crate rustc_serialize;
use rustc_serialize::hex::FromHex; use rustc_serialize::hex::FromHex;
use std::io::{BufRead, stdin}; use std::io::{BufRead, stdin};
use std::iter::repeat;
fn score(plaintext: &Vec<u8>) -> u32 {
let ranking = [24, 7, 15, 17, 26, 11, 10, 19, 22, 4, 5, 16, 13,
21, 23, 8, 2, 18, 20, 25, 14, 6, 12, 3, 9, 1];
let mut score = 0;
for ch in plaintext.iter() {
if ch >= &97 && ch <= &122 {
score += ranking[(ch - 97) as usize];
}
}
score
}
fn main() { fn main() {
env_logger::init().unwrap(); env_logger::init();
let stdin = stdin(); let stdin = stdin();
let mut maxscore = 0; let mut maxscore = 0;
let mut decrypted: Vec<u8> = vec![]; let mut decrypted: Vec<u8> = vec![];
@ -29,15 +12,12 @@ fn main() {
for line in stdin.lock().lines().filter_map(|x| x.ok()) { for line in stdin.lock().lines().filter_map(|x| x.ok()) {
match line.from_hex() { match line.from_hex() {
Ok(ciphertext) => { Ok(ciphertext) => {
for key in 0..0xff { let (plaintext, score) = break_xor_cipher(&ciphertext);
let plaintext: Vec<u8> = ciphertext.iter().zip(repeat(key)).map(|(c, k)| c ^ k).collect(); if score > maxscore {
let s = score(&plaintext); maxscore = score;
if s > maxscore {
maxscore = s;
decrypted = plaintext; decrypted = plaintext;
} }
} }
}
Err(e) => error!("{}", e) Err(e) => error!("{}", e)
} }
} }