Pwntools example

exploit.py

from pwn import *

# Doc: docs.pwntools.com/en/stable/

context.log_level = 'debug'  # debug/info/error/warning.
context.arch = 'i386'  # i386/x64/arm, etc.

## OPEN SOCKET.
sock = remote('challenges.ecsc-teamfrance.fr', 2000)
## OR, OPEN LOCAL PROCESS.
# sock = process('./pwn')

sock.recvuntil('Now, enter your text: ')
sock.sendline('Hello!')
sock.recvuntil('Here is your ciphertext: ')

data = sock.recvline()
print('Result: %s' % data)

sock.interactive()  # open an interactive connection (useful when we got a shell :)).
sock.close()