client.go Client encrypts msg with AES-CFB algorithm using key and iv.

Decrypt decodes the ciphertext from base64 then decrypts it with key and iv using AES-CFB.

crypto.go Encrypt encrypts the plaintext with key and iv using AES-CFB and returns it in base64.

server.go Server listens on 127.0.0.1:port, attempts to decrypt any message received with key and iv using AES-CFB.