sms-webhook

What is it

A simple sms webhook with plain authentication to get the SMS you receive on your android phone on IRC.
I have a made blogpost about it here.

Features

• The IRC bot supports SASL plain authentication.
  
• The webhook endpoint itself supports HTTP basic authentication.
  
• The webhook has pocketbase integrated so you can use that to create new users.
  

Note: Last but not least, you will need a forwarding agent that actually sends the SMS you get on your android device to the webhook endpoint.
Currently this is what I'm using to forward my SMS to the webhook. Also make sure the app settings on android are changed accordingly because the forwarder needs to run in the background so make sure android does not battery-optimize it out of existence.

Config

An example config file:

IrcServer = "myirc.awesome.net"
IrcPort = 6669
IrcNick = "mynick"
IrcSaslUser = "mynick"
IrcSaslPass = "h4x0r1337p055w0rd"
IrcChannel = "1337p17"

Deployment

A docker compose file is available for a quick setup:

version: "3.9"
services:
  sms-webhook:
    image: sms-webhook
    build:
      context: .
    deploy:
      resources:
        limits:
          memory: 256M
    logging:
      driver: "json-file"
      options:
        max-size: "100m"
    networks:
      - smsnet
    restart: unless-stopped
    ports:
      - "127.0.0.1:8091:8090"
    depends_on:
      - nginx
    volumes:
      - pb-vault:/sms-webhook/pb_data
      - ./config.toml:/opt/smswebhook/config.toml
    cap_drop:
      - ALL
    dns:
      - 9.9.9.9
    environment:
      - SERVER_DEPLOYMENT_TYPE=deployment
    entrypoint: ["/sms-webhook/sms-webhook"]
    command: ["serve", "--http=0.0.0.0:8090"]
  nginx:
    deploy:
      resources:
        limits:
          memory: 128M
    logging:
      driver: "json-file"
      options:
        max-size: "100m"
    image: nginx:stable
    ports:
      - "8090:443"
    networks:
      - smsnet
    restart: unless-stopped
    cap_drop:
      - ALL
    cap_add:
      - CHOWN
      - DAC_OVERRIDE
      - SETGID
      - SETUID
      - NET_BIND_SERVICE
    volumes:
      - ./nginx.conf:/etc/nginx/nginx.conf:ro
      - /etc/letsencrypt/live/sms.terminaldweller.com/fullchain.pem:/etc/letsencrypt/live/sms.terminaldweller.com/fullchain.pem:ro
      - /etc/letsencrypt/live/sms.terminaldweller.com/privkey.pem:/etc/letsencrypt/live/sms.terminaldweller.com/privkey.pem:ro
networks:
  smsnet:
    driver: bridge
volumes:
  sms-vault:
  pb-vault:

events {
  worker_connections 1024;
}
http {
  include /etc/nginx/mime.types;
  server_tokens off;
  limit_req_zone $binary_remote_addr zone=one:10m rate=30r/m;
  server {
    listen 443 ssl;
    keepalive_timeout 60;
    charset utf-8;
    ssl_certificate /etc/letsencrypt/live/sms.terminaldweller.com/fullchain.pem;
    ssl_certificate_key /etc/letsencrypt/live/sms.terminaldweller.com/privkey.pem;
    ssl_ciphers HIGH:!aNULL:!MD5:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384;
    ssl_protocols TLSv1.2 TLSv1.3;
    ssl_session_cache shared:SSL:50m;
    ssl_session_timeout 1d;
    ssl_session_tickets off;
    ssl_prefer_server_ciphers on;
    sendfile on;
    tcp_nopush on;
    add_header X-Content-Type-Options "nosniff" always;
    add_header Strict-Transport-Security "max-age=31536000; includeSubDomains" always;
    # add_header Content-Security-Policy "default-src 'none'; base-uri 'self'; form-action 'none'; manifest-src 'self'; connect-src * blob:; script-src 'self' 'unsafe-eval'; style-src 'self'; font-src 'self'; frame-ancestors 'none'; img-src 'self' data: blob:; media-src blob:; object-src blob:; sandbox allow-same-origin allow-scripts allow-forms allow-popups allow-modals allow-downloads";
    add_header X-Frame-Options SAMEORIGIN always;
    add_header X-XSS-Protection "1; mode=block" always;
    add_header Referrer-Policy "no-referrer";
    fastcgi_hide_header X-Powered-By;

    error_page 401 403 404 /404.html;
    location / {
      proxy_pass http://sms-webhook:8090;
    }
  }
}

The setup uses nginx as a reverse proxy for TLS termination. The nginx config for that is also provided in the repo.