ethauth

Login with ethereum

An example auth/challenge server that uses crypto and ethereumjs-util to very signatures through web3.

• /sentence generates a random sentence and returns a (uuid, sentence) pair.
• Client signs the message and sends the signature to /auth along with the uuid
• Server verifies correct signature and responds with a jwt token.

Demo

A simple demo can be located at https://ethauth.surge.sh with the respective git repo at https://github.com/martolini/ethauth-demo

Try it

dotenv is used for local environment variables.

• git clone git@github.com:martolini/ethauth.git
• npm install
• For firebase, you need two things. An environment variable DATABASE_URL from firebase, and a service account/pk file (.json) with the name firebase-pk.json in the root folder.
• For JWT, set JWT_SECRET as an environment variable.
• npm start

Credits

Heavily inspired by following https://hackernoon.com/never-use-passwords-again-with-ethereum-and-metamask-b61c7e409f0d