stage

problems/p8/src/main.rs

@@ -0,0 +1,29 @@
+use std::collections::HashSet;
+use std::fs::File;
+use std::io::{self, BufRead};
+
+fn is_ecb(cipher: &[u8]) -> bool {
+    // Check if the input is a valid ECB encrypted data
+    let mut seen_blocks = HashSet::new();
+    for chunk in cipher.chunks(16) {
+        if seen_blocks.contains(chunk) {
+            return true; // Duplicate block found, indicating ECB mode
+        }
+        seen_blocks.insert(chunk);
+    }
+
+    false
+}
+fn main() {
+    let file_name = "problems/p8/8.txt".to_string();
+    for line in io::BufReader::new(File::open(file_name).expect("Unable to open file")).lines() {
+        let line = line.expect("Unable to read line");
+        let cipher = hex::decode(&line).expect("Invalid hex string");
+
+        if is_ecb(&cipher) {
+            println!("ECB detected: {}", line);
+        }
+    }
+    println!("Finished checking for ECB mode.");
+}
+