G0Bin

G0Bin is a client side encrypted pastebin. The server has zero knowledge of pasted data. Data is encrypted/decrypted in the browser using 256 bits AES.

DEMO: http://g0bin-demo.appspot.com

G0Bin is a Go port of 0bin (written in Python). 0bin in turn is an implementation of the ZeroBin project (written in PHP).

This project was created mostly as a Go learning exercise through converting a project I use often. It also serves as a great sample project in Go since it only uses the standard library.

Here are some elements that are have been implemented.

• Nested HTML Templates
• Using Anonymous Structs to pass data to HTML Templates
• Hot configuration reload from a JSON configuration file
• HTTP server logging

NOTE: The demo was modified to run on Google App Engine using the Datastore API.

How it works

When pasting a text into G0Bin:

• You paste your text in the browser and click the “Submit” button.
• A random 256 bits key is generated in the browser.
• Data is compressed and encrypted with AES using Javascript libraries.
• Encrypted data is sent to the server and stored.
• The browser displays the final URL with the key.
• The key is never transmitted to the server, which therefore cannot decrypt data.

When opening a G0Bin URL:

• The browser requests encrypted data from the server
• The decryption key is in the anchor part of the URL (#…) which is never sent to the server.
• Data is decrypted in the browser using the key and displayed.

Install

Clone this repository, build it and run it.

git clone https://github.com/jyap808/g0bin.git
cd g0bin
go build
./g0bin

To run G0Bin on a different port, modify the Port setting in config.json.

The configuration of G0Bin can also be reloaded by sending a HUP signal to the process.

kill -HUP [PROCESS ID]

Other

This project modifies the Python implementation and cleans things up to make them more generic. It has the following changes:

• Remove extra header links.
• Remove extra link options.
• Remove extra layout details.
• Set Burn after reading as default option.

Here are some items which are in the Python implemention which have not been implemented.

• Paste counter - Display a tiny counter for pastes created
• Names/links to insert in the menu bar
• Paste ID length
• Clone paste

Copyright (c) 2016 Julian Yap

MIT License