RSA authentication in Python

Hi!, for this week we need to implement an RSA authentication in Python for a client-server system with sockets, so I made 3 scripts, one script is the Server that has the following steps:

• We need a listener wait for a client
• Accept a socket
• We need to load e and n from a file
• Send a random number and send it to client
• Compute a y = r^e%n
• Check if we have the same value
• We have a login

The other script is the Client that has the following steps:

• Looking for a socket
• We need to load d and n from a file
• Compute y = f(x) and then r = y^d%n
• Wait for login

Server

Client

Generator keys
Also I made a generator of keys, following the slides from the course.

This is how works my code, for example, if we need a new user:

User.dat = User d n

Claves-Server.txt = User e n 

But, if we try to login with a different user.