#!/usr/bin/env python3

from pwn import *

HOST = "130.192.5.212"
PORT = "6532"

server = remote(HOST, PORT)
sleepT = 0.5
# Different IV when CBC therefore different encryption?
for i in range(128):
    print('-'*20)
    print(server.recv(1024))
    payload = (b'A'*32).hex()
    server.send(payload)
    server.send('\n')
    sleep(sleepT)
    enc = server.recv(1024).split(b":")[1].split(b'\n')[0].strip()
    print(f"Encryption1:{enc}")
    enc = bytes.fromhex(enc.decode('utf-8'))
    sleep(sleepT)
    #payload2 =  bytes([d1 ^ e1 for d1, e1 in zip(b'A'*32, enc)])
    payload2 = (b'A'*32).hex()
    #print(payload2)

    #payload2= (b'B'*32).hex()
    server.send(payload2)
    server.send('\n')
    sleep(sleepT)
    enc2 = server.recv(1024).split(b":")[1].split(b'\n')[0].strip()
    #print(enc)
    print(f"Encryption2:{enc2}")
    enc2 = bytes.fromhex(enc2.decode('utf-8'))
    sleep(sleepT)
    if(enc==enc2):
        print("ECB")
        server.send(b"ECB")
        server.send("\n")
    else:
        print("CBC")
        server.send(b"CBC")
        server.send("\n")
        sleep(sleepT)
    #print(server.recv(1024))
    sleep(sleepT)

print(server.recv(1024))