Rotten

Rotten simply required you to use a caesar cipher to decode the text it sent you. Luckily, once decoded, all the text contained the word send and this allowed us to filter out the correct shift.

import socket
from caesarcipher import CaesarCipher

host = "jh2i.com"
port = 50034


count = 0
flag = [" "] * 30
print(len(flag))

while True:
    s =  socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    s.connect((host, port))
    while True:
        try:
            data = s.recv(1024).decode("utf-8")
            for i in range(1, 27, 1):
                x = CaesarCipher(data, offset=i).encoded
                if "send" in x:
                    break
            
            if count > 0:
                pos = x.split(" ")[6]
                char = x.split(" ")[11].replace("\n","")
                print(pos, char)
                flag[int(pos)] = char

            s.sendall(data.encode())

            if len(data) == 0:
                break
            
            count += 1
        except:    
            print("error", flag)
            s.close()
            count = 0
            break
    if " " not in flag:
        break
        u = ""
        for i in flag:
            u += i
        print(u)