Sw1tch: Matrix Registration and Admin System for Conduwuit

Sw1tch is a FastAPI-based web application designed to enhance the conduwuit Matrix homeserver by addressing key shortcomings for public deployments. It manages account registration with email-based token requests and provides an admin API by relaying HTTP requests to a Matrix admin room, parsing responses for automation. Currently in use for the We2.ee homeserver at join.we2.ee.

This project is specifically built around conduwuit, an excellent Matrix homeserver that lacks native SMTP authentication and a robust admin API—issues sw1tch resolves elegantly.

Features

• Daily rotating registration tokens, emailed upon request
• Email-based registration requiring a valid address
• Rate limiting per email address
• IP, email, and regex-based username banning
• Automatic downtime before token rotation
• Admin API via Matrix room message relaying
• Warrant canary generation and posting (work in progress)
• Gruvbox-themed, responsive UI

Setup

1. Clone the Repository:

   git clone https://sij.ai/sij/hand_of_morpheus
   cd hand_of_morpheus

2. Install Dependencies:

   pip install fastapi uvicorn jinja2 httpx pyyaml python-multipart nio requests feedparser urllib3 smtplib

3. Set Up Configuration:

   cp -r ./sw1tch/example-config ./sw1tch/config
   nano sw1tch/config/config.yaml

   • config.yaml: Fill in credentials and options for registration, Matrix admin, canary, and SMTP.
   • conduwuit.env: Add conduwuit settings (see Conduwuit Config Examples).
   • banned_emails.txt: Prefilled with disposable email providers linked to spam/abuse.
   • banned_usernames.txt: Prefilled with regex patterns targeting CSAM-related usernames.
   • banned_ips.txt: Blank; add IPs to block token requests.
   • attestations.txt: Generic statements for the warrant canary; customize as needed.

4. Add Static Assets:

   # Add your logo and favicon to the static directory
   cp your-logo.png sw1tch/static/logo.png
   cp your-favicon.ico sw1tch/static/favicon.ico

5. Generate Initial Registration Token:

   openssl rand -hex 16 > sw1tch/data/.registration_token

6. Configure launch.sh:

   • launch.sh manages token rotation, conduwuit container updates, and ensures the sw1tch service runs:
     • Updates the conduwuit Docker image from a Nix-built repository.
     • Refreshes the registration token and restarts the container.
     • Starts or restarts the sw1tch FastAPI service.

   nano launch.sh  # Adjust paths (e.g., BASE_PATH, REPO_PATH) for your environment
   chmod +x launch.sh

7. Set Up Cron Jobs:

   crontab -e

   Add:

   # Daily token refresh and container restart at midnight UTC
   0 0 * * * cd /home/sij/hand_of_morpheus && ./launch.sh --refresh-token > /home/sij/hand_of_morpheus/logs/token_refresh.log 2>&1
   
   # Weekly conduwuit update (Sundays at 2 AM UTC)
   0 2 * * 0 cd /home/sij/hand_of_morpheus && ./launch.sh --update --force-restart > /home/sij/hand_of_morpheus/logs/update.log 2>&1
   
   # Ensure service runs after reboot
   @reboot cd /home/sij/hand_of_morpheus && ./launch.sh > /home/sij/hand_of_morpheus/logs/reboot.log 2>&1

Running the Server

Run manually:

./launch.sh # --refresh-token, --super-admin, --update, and/or --force-restart

launch.sh Command line flags

1. --refresh-token:

   • Purpose: Generates a new, random 6-character hexadecimal registration token and writes it to sw1tch/data/.registration_token.
   • Behavior: Overwrites the existing token, logs the new value, and exits on failure (e.g., if the file isn’t writable).
   • When to Use:
     • Daily via cron (e.g., at midnight UTC) to rotate tokens as a security measure.
     • Manually if you suspect the current token has been compromised.
   • Example: ./launch.sh --refresh-token

2. --super-admin:

   • Purpose: Generates a random 16-character emergency password for the @conduit user in conduwuit and passes it to the container via CONDUWUIT_EMERGENCY_PASSWORD.
   • Behavior: Logs the username (@conduit:we2.ee) and password, which you can use to log in and regain admin access.
   • When to Use:
     • During initial setup to establish admin access.
     • If you lose access to the admin account and need to recover it.
   • Example: ./launch.sh --super-admin

3. --update:

   • Purpose: Updates the conduwuit Docker image by pulling the latest source from REPO_PATH, building it with Nix, and tagging it as conduwuit:custom.
   • Behavior: Requires Git and Nix; exits on failure (e.g., if the build fails or no image is produced).
   • When to Use:
     • Weekly via cron to keep conduwuit up-to-date with the latest features or fixes.
     • Manually when you want to apply a specific update.
   • Example: ./launch.sh --update

4. --force-restart:

   • Purpose: Forces the sw1tch registration service to restart by killing any process on the configured port (from config.yaml) and starting a new instance.
   • Behavior: Removes the PID file, starts python3 -m sw1tch detached, and verifies it’s running; logs errors if it fails to start.
   • When to Use:
     • After updating sw1tch code or configuration to ensure changes take effect.
     • If the service is unresponsive or stuck.
     • Combined with --update to refresh everything.
   • Example: ./launch.sh --force-restart

Additional Notes

• Combination: Flags can be combined (e.g., ./launch.sh --update --force-restart) for comprehensive updates.
• Default Behavior: Without flags, the script restarts the conduwuit container and ensures sw1tch is running (no forced restart).
• Cron Integration: The comments align with your crontab (daily --refresh-token, weekly --update --force-restart, reboot startup).

Security Features

• IP Banning: Add IPs to sw1tch/config/banned_ips.txt.
• Email Banning: Add emails to sw1tch/config/banned_emails.txt.
• Username Patterns: Add regex to sw1tch/config/banned_usernames.txt.
• Registration Tracking: Logged to sw1tch/data/registrations.json.
• Admin API: Relays HTTP requests to #admins room, parsing responses.

Security Notes

• Use a reverse proxy (e.g., Nginx) with HTTPS.
• Move .registration_token outside the web root if exposed.
• Backup sw1tch/data/registrations.json regularly.
• Monitor sw1tch/logs/registration.log for abuse.

Warrant Canary

The warrant canary feature (in progress) generates signed statements posted to a Matrix room, using data from RSS feeds and Bitcoin blocks for freshness. Configure in config.yaml under canary. Current limitations include UI polish and broader testing.

Conduwuit Integration

Sw1tch resolves two conduwuit shortcomings:

1. Email-Based Registration: Requires a valid email for token requests, enhancing security for public homeservers.
2. Admin API: Bridges HTTP requests to Matrix room messages, enabling automation by parsing @conduit responses.

Review launch.sh for conduwuit container management settings.