Protostar - Net #1

About:

This level tests the ability to convert binary integers into ascii representation. (link)


Source Code:

Solution:

Net1 seems to be the inverse operation as net0 -- take a 32-bit little-endian integer and send it back using ascii representation.

Here's a quick python script that will do it for you:

#!/usr/bin/env python
#

import socket
import struct

HOST = "127.0.0.1"
PORT = 2998

s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

s.connect((HOST, PORT))

msg = struct.unpack("I", s.recv(1024))[0]
print msg

to_send = str(msg) + "\n"
print to_send

s.sendall(to_send)
print "sending:", to_send

print "response:", s.recv(1024)


Running it gives the following output:

user@protostar:/opt/protostar/bin$ python /tmp/net1.py
1763649439
1763649439

sending: 1763649439

response: you correctly sent the data