rctf-babyre-solve.py

#!/usr/bin/python

import pwn

pwn.context.log_level = "error"

key = {}

for c in "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_-{}":
  p = pwn.process("./babyre")
  p.sendline("test 16")
  p.sendline("%c" % c)
  data = p.recvall()
  x = data[20:28]
  try:
    key[int(x,16)] = c
  except:
    print "missing: %s" % x
  # print "%c:%s" % (c,x)
  p.close()

out = ""
f = open("out")
for l_ in f.readlines():
  l = l_.rstrip()
  leftword = l[0:8]
  rightword = l[8:]
  out += key[int(leftword,16)]
  out += key[int(rightword,16)]
  # print leftword
  # print rightword

f.close()
print out