From 174772b5b8d9f5bf5e3c8e8152adfd89f0e83f6b Mon Sep 17 00:00:00 2001
From: Justin Wernick <justin@worthe-it.co.za>
Date: Tue, 19 Apr 2022 20:22:56 +0200
Subject: Refile for merging repos

---
 2016/aoc5/src/main.rs | 49 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 49 insertions(+)
 create mode 100644 2016/aoc5/src/main.rs

(limited to '2016/aoc5/src')

diff --git a/2016/aoc5/src/main.rs b/2016/aoc5/src/main.rs
new file mode 100644
index 0000000..31bef5e
--- /dev/null
+++ b/2016/aoc5/src/main.rs
@@ -0,0 +1,49 @@
+extern crate md5;
+
+fn main() {
+    let room = "reyedfim";
+
+    let mut i = 0;
+    let mut found_bytes = 0;
+
+    let mut code: [Option<u8>; 8] = [None;8];
+
+    println!("Cracking the passwordz");
+    print_code(&code);
+    
+    while found_bytes < 8 {
+        let room_string = format!("{}{}", room, i);
+        let room_bytes = room_string.into_bytes();
+        let hash = md5::compute(room_bytes.as_slice());
+        if match_hash(hash) {
+            let position = hash[2];
+            let value = hash[3] / 16;
+            if code[position as usize].is_none() {
+                code[position as usize] = Some(value);
+                print_code(&code);
+                found_bytes += 1;
+            }
+        }
+        
+        i+=1;
+    }
+
+    println!("Password found!");
+}
+
+fn match_hash(hash: [u8; 16]) -> bool {
+    hash[0] == 0 &&
+        hash[1] == 0 &&
+        hash[2] < 8
+}
+
+fn print_code(code: &[Option<u8>; 8]) {
+    println!("");
+    for &byte in code.iter() {
+        match byte {
+            None => {print!("-");},
+            Some(x) => {print!("{:x}", x);}
+        }
+    }
+    println!("");
+}
-- 
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