commit 075cfc05d13df3bada60413edcc9df47ba8d51f4
Author: beneth <bmauduit@beneth.fr>
Date:   Fri Jan 3 19:16:43 2020 +0100

    Starting Cryptopals challenge 1

diff --git a/set1/chal1/.gitignore b/set1/chal1/.gitignore
new file mode 100644
index 0000000..4470988
--- /dev/null
+++ b/set1/chal1/.gitignore
@@ -0,0 +1,2 @@
+target/
+Cargo.lock
\ No newline at end of file
diff --git a/set1/chal1/Cargo.lock b/set1/chal1/Cargo.lock
new file mode 100644
index 0000000..3792a21
--- /dev/null
+++ b/set1/chal1/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "chal1"
+version = "0.1.0"
+
diff --git a/set1/chal1/Cargo.toml b/set1/chal1/Cargo.toml
new file mode 100644
index 0000000..4564721
--- /dev/null
+++ b/set1/chal1/Cargo.toml
@@ -0,0 +1,9 @@
+[package]
+name = "chal1"
+version = "0.1.0"
+authors = ["beneth <bmauduit@beneth.fr>"]
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
diff --git a/set1/chal1/src/main.rs b/set1/chal1/src/main.rs
new file mode 100644
index 0000000..c9bc164
--- /dev/null
+++ b/set1/chal1/src/main.rs
@@ -0,0 +1,19 @@
+use std::env;
+
+fn hex_to_char(s: &str) -> Result<char, std::num::ParseIntError> {
+    u8::from_str_radix(s, 16).map(|n| n as char)
+}
+
+fn main() {
+    let args: Vec<String> = env::args().collect();
+    let input = &args[1];
+
+    let char_vec: Vec<char> = input.chars().collect();
+    let split = &char_vec.chunks(2)
+        .map(|chunk| chunk.iter().collect::<String>())
+        .collect::<Vec<_>>();
+
+    for s in split {
+        println!("{:?}", hex_to_char(s));
+    }
+}