finish 8

set1/challenge8.py

@@ -0,0 +1,26 @@
+def detect_aes_ecb(filename):
+    with open(filename, 'r') as file:
+        lines = file.readlines()
+
+    ecb_encrypted_line = None
+    for line_num, line in enumerate(lines):
+        # Remove any trailing whitespace and decode hex to bytes
+        ciphertext = bytes.fromhex(line.strip())
+
+        # Split ciphertext into 16-byte blocks
+        blocks = [ciphertext[i:i+16] for i in range(0, len(ciphertext), 16)]
+
+        # Check for repeating blocks
+        if len(blocks) != len(set(blocks)):
+            ecb_encrypted_line = line_num + 1  # Line numbers are 1-indexed
+            break
+
+    return ecb_encrypted_line
+
+# Usage:
+filename = '8.txt'
+ecb_line = detect_aes_ecb(filename)
+if ecb_line:
+    print(f'Line {ecb_line} is likely encrypted using AES in ECB mode.')
+else:
+    print('No ECB encrypted ciphertext found.')