エラーによって起動するも使用できません

[yukkuri895]

以前からニコ生の通知用として活用させていただいておりました。
先日サーバーを再起動して以降、MAC check failedエラーによって使用できなくなってしまいました。。
サーバーはRaspberry pi 4BでOSはRaspberryPi OS11.7です。以下に出力されたメッセージを貼りましたので、お時間があればよろしくお願いします。

2023-09-28 23:20:28,272@ discord.client [WARNING] init: PyNaCl is not installed, voice will NOT be supported
2023-09-28 23:20:28,273@ live-notification-bot [INFO] init: cogを読むぞ！
2023-09-28 23:20:28,454@ live-notification-bot [INFO] setup: LiveNotificationBotを読み込む！
2023-09-28 23:20:28,457@ discord.client [INFO] login: logging in using static token

• Serving Flask app "" (lazy loading)
• Environment: production
  WARNING: This is a development server. Do not use it in a production deployment.
  Use a production WSGI server instead.
• Debug mode: off
  2023-09-28 23:20:29,090@ discord.gateway [INFO] identify: Shard ID None has sent the IDENTIFY payload.
  2023-09-28 23:20:29,423@ discord.gateway [INFO] received_message: Shard ID None has connected to Gateway: ["gateway-prd-us-east1-b-tw1m",{"micros":131869,"calls":["id_created",{"micros":1606,"calls":[]},"session_lookup_time",{"micros":414,"calls":[]},"session_lookup_finished",{"micros":15,"calls":[]},"discord-sessions-prd-2-160",{"micros":128610,"calls":["start_session",{"micros":93466,"calls":["discord-api-5dcdf7bc48-lmknl",{"micros":86754,"calls":["get_user",{"micros":24979},"get_guilds",{"micros":10062},"send_scheduled_deletion_message",{"micros":13},"guild_join_requests",{"micros":328},"authorized_ip_coro",{"micros":14}]}]},"starting_guild_connect",{"micros":59,"calls":[]},"presence_started",{"micros":311,"calls":[]},"guilds_started",{"micros":113,"calls":[]},"guilds_connect",{"micros":2,"calls":[]},"presence_connect",{"micros":34602,"calls":[]},"connect_finished",{"micros":34609,"calls":[]},"build_ready",{"micros":20,"calls":[]},"clean_ready",{"micros":1,"calls":[]},"optimize_ready",{"micros":28,"calls":[]},"split_ready",{"micros":0,"calls":[]}]}]}] (Session ID: da832d0d0035e4687c1a20d59c393c4a).
  2023-09-28 23:20:31,473@ discord_slash [INFO] sync_all_commands: Syncing commands...
  2023-09-28 23:20:31,477@ live-notification-bot [INFO] on_ready: We have logged in as BotName#0000
  Ignoring exception in on_ready
  Traceback (most recent call last):
  File "/home/pi/nico/discord-live-notificationbot/.venv/lib/python3.9/site-packages/discord/client.py", line 343, in _run_event
  await coro(*args, **kwargs)
  File "/home/pi/nico/discord-live-notificationbot/cogs/livenotificationcog.py", line 30, in on_ready
  await self.liveNotification.prepare() # dbを作成
  File "/home/pi/nico/discord-live-notificationbot/cogs/modules/live_notification.py", line 110, in prepare
  self.decode()
  File "/home/pi/nico/discord-live-notificationbot/cogs/modules/live_notification.py", line 307, in decode
  self.aes.decode()
  File "/home/pi/nico/discord-live-notificationbot/cogs/modules/aes_angou.py", line 33, in decode
  data = cipher.decrypt_and_verify(ciphertext, tag)
  File "/home/pi/nico/discord-live-notificationbot/.venv/lib/python3.9/site-packages/Crypto/Cipher/_mode_eax.py", line 368, in decrypt_and_verify
  self.verify(received_mac_tag)
  File "/home/pi/nico/discord-live-notificationbot/.venv/lib/python3.9/site-packages/Crypto/Cipher/_mode_eax.py", line 309, in verify
  raise ValueError("MAC check failed")
  ValueError: MAC check failed
  2023-09-28 23:20:32,220@ discord_slash [INFO] sync_all_commands: Syncing permissions...
  2023-09-28 23:20:32,221@ discord_slash [INFO] sync_all_commands: Completed syncing all commands!
  2023-09-28 23:20:42,951@ live-notification-bot [INFO] live_notification_list: live-notificationを確認するぜ！
  2023-09-28 23:20:42,952@ live-notification-bot [INFO] check_printer_is_running: Taskが停止していたので再起動します。
  Unhandled exception in internal background task 'printer'.
  Traceback (most recent call last):
  File "/home/pi/nico/discord-live-notificationbot/.venv/lib/python3.9/site-packages/discord/ext/tasks/init.py", line 101, in _loop
  await self.coro(*args, **kwargs)
  File "/home/pi/nico/discord-live-notificationbot/cogs/livenotificationcog.py", line 57, in printer
  for live in self.liveNotification.live_rows:
  TypeError: 'NoneType' object is not iterable

[tetsuya-ki]

うーん、、、暗号化したやつが正常に復号できなくて出るエラーっぽいですね。。。
適当に保存や暗号化などしているので、破壊されてしまったのかもしれないです。。。

[yukkuri895]

なるほど。。実行環境がローカルなので暗号化は解除しても問題はないと思われるので、何か方法はありますでしょうか...

[tetsuya-ki]

壊れた暗号化ファイルしかない状態の場合は、一旦ファイルを削除して作り直すしかないと思います(オプションによっては、Discordにそこそこ新しいバージョンのファイルが添付されてるかもしれません)。

また、以下オプションつけて起動すると暗号化処理が入らないので壊れにくいです。
KEEP_DECRYPTED_FILE=TRUE

お手数ですが、たまにバックアップ取るといいと思います。

[yukkuri895]

ありがとうございます！./cogs/modules/files/encrypted.binの削除で正常に動きました！