@alexrinttAndroid/Flutter.

Web Crypto API, AES-GCM, React, GitHub API, Primer Design... a deep dive into how GitBox works

Web Crypto API, AES-GCM, React, GitHub API, Primer Design... a deep dive into how GitBox works

Friday, May 26th 2023 by @alexrintt at GitHub

GitBox is a E2EE (end-to-end encrypted) file sharing service, it allows people share private files (< 50mb) through their public repositories.

The tech stack is based on:

React and vite, redux, saga, etc.
libsodium for cryptography.
GitHub API as server.
Primer Design System.

GitBox is actually pretty simple, it just manages your files locally using the Web File Reader API, when uploading to GitHub it first encrypts using secret-key encryption (symmetric), then it generates a download URL that is just a URL that points a React route that downloads the raw encrypted file from GitHub servers and decrypt using the decryption key and nonce also provided by the download URL.

Little trick to simulate Kotlin when statement in Dart 3.0+

I've always wanted a when statement when working with Flutter/Dart. Most of the time UI is not a if else but a switch! So instead of writing: You can now simply inline this:

Sunday, June 18th 2023

How to handle large files using Streams

Yesterday and today I got a challenge in a project of mine, the thing is I was required to create a feature where the user could upload a file to a cloud service. I wrote the API client. I wrote the file picker. I wrote the UI. Then I…

Using Nodemon to watch translation files and automatically re-run code generation in Flutter

Sunday, June 11th 2023

Using Nodemon to watch translation files and automatically re-run code generation in Flutter

Although Dart has it's build system, it's not solid as rock as we see Gradle in Android. So since there is no fancy build system yet, boring tasks are still... boring. And while I was generating the translations of my Flutter project Kanade…

How to use GitBox to upload and share files privately through public Git repositories

Friday, May 26th 2023

How to use GitBox to upload and share files privately through public Git repositories

GitBox is a very basic file manager built on top of the GitHub API (at first) that implements E2EE. This service allows you to upload files to your public repositories and generate their download links, well you may ask what is the point if…

Creating a fine-grained GitHub access token that has permission only over a specific single repository

Friday, May 26th 2023

Creating a fine-grained GitHub access token that has permission only over a specific single repository

1. Login into your account First step is to login into your GitHub account at https://github.com. 2. Go to settings Open your profile settings: https://github.com/settings/profile. 3. Go to Developer settings 4. Click Personal access…

Tools to intercept android app network/request as root (without root)

Wednesday, May 24th 2023

Tools to intercept android app network/request as root (without root)

Android certificates To intercept a device's network you need to install a certificate into it, this certificate grants a third-party application permission to record/intercept other application requests, but there's two types of…

Use GitHub discussions tab as CMS of your blog

Tuesday, May 23rd 2023

Use GitHub discussions tab as CMS of your blog

TD;DR: Through GitHub discussions web editor. Just create a new discussion using the "published" category you chose before, this will prevent anyone from publishing in your blog except you and those you gave writing permissions.

How to use Obsidian's blog template (Built with Gatsby and GitHub actions but no coding skills are required)