Updated AirPod Keys (markdown)

AirPod-Keys.md

@@ -105,7 +105,72 @@ Any MacOS version should work. This example is from a Mac Air (M1) running Sonom
 
 ### Linux
 
-You can retrieve the keys on Linux using the [Home Assistant Private BLE Device Integration](https://www.home-assistant.io/integrations/private_ble_device/). This integration allows you to extract the necessary information from the AirPods.
+You can retrieve the keys via this custom script, thanks to [@kavishdevar](https://github.com/kavishdevar) :heart: 
+
+```python
+import sys
+import socket
+
+PROXIMITY_KEY_TYPES = {
+    0x01: "IRK",
+    0x04: "ENC_KEY",
+}
+
+def parse_proximity_keys_response(data):
+    if len(data) < 7 or data[4] != 0x31:
+        return None
+    key_count = data[6]
+    keys = []
+    offset = 7
+    for _ in range(key_count):
+        if offset + 3 >= len(data):
+            break
+        key_type = data[offset]
+        key_length = data[offset + 2]
+        offset += 4
+        if offset + key_length > len(data):
+            break
+        key_bytes = data[offset:offset + key_length]
+        keys.append((PROXIMITY_KEY_TYPES.get(key_type, f"TYPE_{key_type:02X}"), key_bytes))
+        offset += key_length
+    return keys
+
+def hexdump(data):
+    return " ".join(f"{b:02X}" for b in data)
+
+def main():
+    if len(sys.argv) != 2:
+        print(f"Usage: {sys.argv[0]} <MAC>")
+        sys.exit(1)
+
+    bdaddr = sys.argv[1]
+    PSM = 0x1001
+
+    handshake = bytes.fromhex("00 00 04 00 01 00 02 00 00 00 00 00 00 00 00 00")
+    key_req = bytes.fromhex("04 00 04 00 30 00 05 00")
+
+    sock = socket.socket(socket.AF_BLUETOOTH, socket.SOCK_SEQPACKET, socket.BTPROTO_L2CAP)
+    sock.connect((bdaddr, PSM))
+    sock.send(handshake)
+    sock.send(key_req)
+
+    try:
+        while True:
+            pkt = sock.recv(1024)
+            keys = parse_proximity_keys_response(pkt)
+            if keys is not None:
+                print("Proximity Keys:")
+                for name, key_bytes in keys:
+                    print(f"  {name}: {hexdump(key_bytes)}")
+                break
+    finally:
+        sock.close()
+
+if __name__ == "__main__":
+    main()
+```
+
+_Via https://github.com/d4rken-org/capod/issues/290#issuecomment-3046151031_
 
 ### Windows