SamIsTheFBI/Lets-Chat

A WIP multi-platform (Flutter) Matrix client app. Yeah, it was called Let's Chat in the beginning.

🗨️ Ciphera - Secure Messaging App

Secure messaging was never this easy.

About this app

Ciphera is a decentralized multi-platform (Flutter) Matrix client messaging app. It allows for secure messaging with full support for end-to-end encryption using the Matrix REST API and the Olm/Megolm protocols.

Features

• Decentralized: The backend server can be hosted by anyone.
• Cross-platform support: This app is made in Flutter which supports building for all major platforms.
• Secure Messaging: All data is AES-256 encrypted at rest
• End-to-End Encryption: E2EE for direct chats using Olm/Megolm
• Light/Dark Modes

Setup

Setting up Synapse

Synapse is an open-source Matrix homeserver implementation. We will be using this for our messaging service.

• Go to synapse directory and run the following command:

  sudo docker run -it --rm
  -v $(pwd)/data:/data
  -e SYNAPSE_SERVER_NAME=<your ip address>
  -e SYNAPSE_REPORT_STATS=yes
  matrixdotorg/synapse:latest generate

• A homeserver.yaml file will be generated in the data directory. We have to modify a few lines in this file so as to use Postgres database instead of the default SQLite. You might need to use terminal-based editors on Linux since these require admin privileges.

  # /data/homeserver.yaml
  # Change the database part
  ....
  ...
  database:
    name: psycopg2
    args:
      user: synapse_user
      password: your_password
      database: synapse
      host: postgres
      port: 5432
    allow_unsafe_locale: true
  ...
  ...
  # ..and a bit of server modifications to ease the registration process
  allow_public_users: true
  enable_registration: true
  enable_registeration_captcha: false
  enable_registration_without_verification: true
  suppress_key_server_warning: true
  rate_limiting:
    enabled: true
    per_second: 10
    burst_size: 20

• Make docker containers.

  docker-compose up -d --build
  
  # check status of containers
  docker ps
  
  ## Stop compose
  docker-compose stop
  
  ## Start compose
  docker-compose start
  
  ## Register a user using cli
  docker exec -it synapse register_new_matrix_user http://localhost:8008 -c /data/homeserver.yaml -u username -p password --no-admin

Setting up Registration Server (optional if not using the register button in app)

• Run the Flask app.

  cd registration-backend
  
  sudo pip install flask
  
  sudo python app.py

Building the Ciphera app

Since this app is made using Flutter, we can build and run applications for Linux, ChromeOS, Windows, Android and macOS. For further information, check Flutter website.

• Run the app.

  cd flutter-app
  
  # get required programs to run on your desired platform
  
  # check devices
  flutter device
  
  flutter run