Instructions

To run the server:

1. Clone repository
2. cd into directory
3. npm install
4. npm start

To use the client files:

1. cd client_files

2. To register a user:

  node register.js {user} {password}

user - The user you want to register with.

password - The password you want the user to register with.

3. To add a public key:

  node add_key.js {user} {password} {publicKeyFilePath}

user - User to register public key for.

password - Password for the user.

publicKeyFilePath - Relative file path for the public key pem file. Example: './publicKey.pem'

4. Generate a signature for your message(for testing convenience purposes, does not call the server)

  node signature_generator.js {privateKeyPemFilePath} {message}

privateKeyPemFilePath - Relative file path for the private key pem file. Example: './privateKey.pem'

message - Message which a signature will be generated for.

Output for this will be a sha512 hash encrypted with the private key in hex format.

5. To verify a message

  node verify_message.js {user} {message} {signature}

user - The user you want to ensure sent your message.

message - Message to be verified. Messages should only be up to 2048 characters.

signature - sha512 message hash encrypted with private key. The signature should be in hex format.

Notes: Server is not using https. In a production environment, the server would talk to a load balancer which would handle incoming https traffic.