initial scripts

entropy-rng-cam.py

@@ -0,0 +1,47 @@
+import hashlib
+import requests
+from io import BytesIO
+from PIL import Image
+import secrets
+
+def fetch_single_frame(url):
+    response = requests.get(url, stream=True)
+    boundary = b'--myboundary'
+    data = b''
+    in_frame = False
+    frame_data = b''
+    for chunk in response.iter_content(chunk_size=1024):
+        data += chunk
+        if not in_frame and boundary in data:
+            in_frame = True
+            data = data.split(boundary, 1)[1]
+        if in_frame and b'Content-Type: image/jpeg' in data:
+            parts = data.split(b'\r\n\r\n', 1)
+            if len(parts) > 1:
+                frame_part = parts[1]
+                if b'\r\n--myboundary' in frame_part:
+                    frame_data = frame_part.split(b'\r\n--myboundary', 1)[0]
+                    try:
+                        return Image.open(BytesIO(frame_data))
+                    except Exception as e:
+                        print(f"Error processing frame: {e}")
+                        return None
+    raise ValueError("No valid frame found in the stream.")
+
+def generate_random_numbers(frame, bit_lengths=[16, 32, 64, 128, 256]):
+    img_bytes = frame.resize((100, 100)).tobytes()
+    entropy = hashlib.sha256(img_bytes).digest()
+    # Use secrets.randbits directly
+    return {length: secrets.randbits(length) for length in bit_lengths}
+
+url = "http://192.168.0.200/mjpg/video.mjpg"
+try:
+    frame = fetch_single_frame(url)
+    if frame:
+        random_numbers = generate_random_numbers(frame)
+        for length, number in random_numbers.items():
+            print(f"{length}-bit random number: {hex(number)}")
+    else:
+        print("Failed to extract a valid frame.")
+except Exception as e:
+    print(f"Error: {e}")