failed miserably at hack.lu

2025/hack.lu/rev/FLAN/get_flag.py

@@ -0,0 +1,91 @@
+import pickle
+import math
+import code128
+
+with open("width_arr.pkl", "rb") as f:
+    width_arr = pickle.load(f)
+
+patterns = [(5, 5, 7, 4, 3, 2), (5, 4, 3, 4, 8, 2), (2, 5, 7, 4, 5, 3), (5, 5, 7, 5, 2, 2), (5, 5, 2, 3, 7, 4), (5, 2, 7, 5, 2, 5), (5, 4, 8, 4, 3, 2), (7, 5, 2, 2, 5, 5), (2, 5, 7, 5, 4, 3), (5, 5, 2, 2, 3, 9), (5, 5, 7, 2, 2, 5), (7, 2, 3, 4, 5, 5), (2, 5, 7, 5, 5, 2), (5, 4, 7, 5, 2, 3), (5, 4, 3, 2, 7, 5), (3, 4, 7, 5, 5, 2), (5, 4, 7, 5, 3, 2), (2, 5, 7, 2, 5, 5), (5, 2, 7, 5, 3, 4), (7, 2, 2, 5, 5, 5), (7, 5, 3, 2, 5, 4), (5, 5, 2, 5, 7, 2), (4, 5, 7, 5, 2, 3), (4, 5, 3, 2, 7, 5), (7, 2, 5, 2, 7, 3), (4, 5, 7, 3, 2, 5), (5, 5, 2, 2, 7, 5), (4, 3, 7, 5, 2, 5), (7, 3, 2, 5, 5, 4), (5, 4, 7, 3, 2, 5), (2, 5, 7, 3, 4, 5), (4, 3, 7, 4, 3, 5), (3, 5, 7, 4, 5, 2), (7, 4, 3, 2, 5, 5), (3, 4, 8, 4, 5, 2), (4, 5, 2, 3, 7, 5), (7, 3, 4, 3, 7, 2), (8, 2, 2, 5, 5, 4), (4, 5, 2, 5, 7, 3), (5, 4, 3, 5, 7, 2), (7, 2, 5, 3, 7, 2), (5, 4, 3, 4, 7, 3), (7, 3, 5, 2, 7, 2), (7, 2, 3, 5, 4, 5), (7, 2, 5, 2, 8, 2), (8, 4, 3, 2, 5, 4), (3, 5, 7, 2, 5, 4), (7, 5, 2, 3, 4, 5), (4, 5, 7, 2, 3, 5), (7, 3, 2, 5, 4, 5), (2, 2, 7, 3, 4, 8), (5, 2, 7, 2, 3, 7), (3, 9, 3, 4, 5, 2), (2, 10, 2, 5, 5, 2), (3, 2, 5, 9, 3, 4), (3, 9, 3, 2, 5, 4), (2, 10, 2, 3, 4, 5), (2, 10, 2, 2, 5, 5), (3, 2, 5, 9, 2, 5), (2, 9, 3, 2, 5, 5), (3, 9, 2, 5, 5, 2), (2, 10, 2, 5, 4, 3), (5, 4, 3, 2, 2, 10), (5, 5, 2, 3, 2, 9), (5, 4, 3, 2, 3, 9), (2, 9, 3, 5, 4, 3), (2, 9, 3, 4, 5, 3), (4, 5, 2, 3, 2, 10), (4, 5, 3, 2, 2, 10), (2, 3, 2, 5, 9, 5), (3, 2, 2, 5, 10, 4), (3, 9, 2, 3, 4, 5), (2, 2, 5, 10, 2, 5), (5, 2, 7, 3, 2, 7), (2, 3, 9, 5, 2, 5), (3, 2, 10, 4, 3, 4), (2, 2, 10, 5, 2, 5)]
+
+special_pattern = (5, 2, 5, 5, 4, 5)
+
+def segment_array_loop(data_list, segment_length=6):
+    """Segments a list into sequences of the specified length."""
+    segments = []
+    for i in range(0, len(data_list), segment_length):
+        # Slice the list from the current index 'i' up to 'i + segment_length'
+        segment = tuple(data_list[i:i + segment_length])
+        segments.append(segment)
+    return segments
+
+segments = segment_array_loop(width_arr, 6)
+
+first = None
+
+b_max = 0
+b_min = 26
+
+w_max = 0
+w_min = 26
+
+last_index_special = 0
+
+b_values = set()
+w_values = set()
+
+for segment in segments:
+    if segment in patterns and segment != first:
+        b = segment[0]+segment[2]+segment[4]
+        w = segment[1]+segment[3]+segment[5]
+        b_values.add(b)
+        w_values.add(w)
+        if b + w != 26:
+            print(segment)
+            break
+        print(f"{segment} : b = {b} : w = {w}")
+        if b < b_min:
+            b_min = b
+        if b > b_max:
+            b_max = b
+        if w < w_min:
+            w_min = w
+        if w > w_max:
+            w_max = w
+        if first is None:
+            first = segment
+
+print(f"b_min: {b_min}, b_max: {b_max}")
+print(f"w_min: {w_min}, w_max: {w_max}")
+
+for id, segment in enumerate(segments):
+    if segment == special_pattern:
+        distance = id - last_index_special
+        print(f"Found special at {id} | Distance {distance} | {chr(distance)}")
+        last_index_special = id
+
+print(f"bars: {b_values}")
+print(f"spaces: {w_values}")
+
+print(len([pattern for pattern in patterns if 10 not in pattern]))
+print(len(patterns))
+
+
+scaled = [tuple(math.ceil(x / 3) for x in t) for t in segments]
+
+def tuple_to_str(t: tuple[int, ...]) -> str:
+    return "".join(map(str, t))
+
+strs = [tuple_to_str(s) for s in scaled]
+
+import codes
+keys = codes.CODE_DICT.keys()
+
+buf = ""
+
+for s in strs:
+    if s in keys:
+       buf += codes.CODE_DICT[s]
+
+with open("data.txt", "w") as f:
+    f.write(buf)
+