Flint-2022

JS Code Challenge Crypto Node Server/Client Example

Important notes:

Instead of using basic-auth it uses a header and an issued key. This was for security purposes.

Prerequisites

1. Node (v20.16+)

Config

Environtment Variables

Setup a .env file for secure variables that are used with the script

• PORT: set the port you want the server to run on
• PASSPHRASE: set the passphrase to use when generating keys

PASSPHRASE = bitpay-ftw-2022!!
PORT = 80d
SCHEME_NAME = BitPayCustomAuth

Usage

Generate RSA Keys

npm start generate {username}

Start Server

npm start server {password}

Store a generated key

Note: Be sure to generate it with the appropriate username first! Use the access key returned from starting the server. npm start submit {username} {accessKey}

Sign a message

npm start sign {username} {message}+

Verify a message

npm start verify {useranme} {signature} {message}+

API

PUT

Stores a public key for a given username. Must be authenticated with an Authorization header with scheme that matches env variable and the hash provided when starting the server. Send a body JSON object containing the username and the public key.

POST

Validates a message against stored public key. Does not require authorization header. Send a body JSON object containing the username, the message and the signature.