Homework: Implementation of RSA algorithm in Python

I implemented with sockets where the server read a plaintext, in the plaintext we have the users with his private keys. The server have to create a random number and pass it by a function, then the server send it to a client where the client has to pass it by a function, the user have to give his name to get his public key where he has d and n. The client have to squarting the random number that the server sent to d module of n, we can call it r. The client sends the hist username and the r value, then the server squart r to e module of n( n and e are the private key), if the value that we get of that operation is equal to the y value, we establish a secure connection, else we say a warning.

The client has to type his name to get his public key.

Server socket

Client socket