cagerton

Upgrade sha1 => scrypt without user logging in/pw reset:

μBackground:

We hash passwords with one-way hash functions to reduce the impact of password database compromise. Passwords hashed with salted SHA or MD5 can ofen be brute forced. Newer password hashhing techniques like Scrypt/Bcrypt/PBKDF2 add computational work to make brute forcing prohibitively expensive.

Problem:

Your service already has users with salted sha1 password hashes. Since you don't have their original passwords you can't upgrade to a modern password hash without getting each user to log in and enter their password.

You have (salt,sha(salt+password)), you want (salt, scrypt(salt,password))

cagerton

import socket
import time
from math import pi, sin

UDP_IP = '192.168.2.2'
UDP_PORT = 9897

def Push(messages):
  """Stolen from: https://github.com/robot-head/PixelPusher-python"""
  assert type(messages) == list

cagerton

# Run this command to check your ssh fingerprint.
ssh-keygen -l -f ~/.ssh/*.pub

cagerton

import java.awt.image.BufferedImage;
import java.awt.image.WritableRaster;

PImage input, output;

void setup() {
  int width=400;
  int height=300;
  size(width,height);
  output = createImage(width,height,RGB);

cagerton

def ones(x):
    if x:
        print "1",
        return ones(x-1)

cagerton

def publish_to_wall(user,unfriend):
    """Prints out a pretty unfriends notice"""
    logging.info('Posting message to %s' % user.id)
    args = {'access_token':user.access_token,
            'message':'is no longer friends with %s.' % (unfriend['name']),
            'picture':'http://graph.facebook.com/%s/picture' % unfriend['id'],
            'link':'http://drama-lama.appspot.com',
            'description': 'DramaLama - the unfriending monitor.',
            }
    post_args = urllib.urlencode(args)

cagerton

# Steps to monitor who removes you from their friends list on facebook:
# Grab the new Facebook Python-SDK from github.
# Modify & run the appengine+oauth example/demo as follows:
# -in facebookoauth.py define _parse_json & _dump_json
# -in user add two db.TextProperty fields: friends, unfriends
# -swap the HomeHandler class for below...
# -update template to display as desired.
# run & reload every few days and see who doesn't like you anymore.

class HomeHandler(BaseHandler):

cagerton

//MOSI:
#define DATAOUT 11
//MISO: (not used, but part of builtin SPI)
#define DATAIN 12
#define SPICLOCK  13
#define SLAVESELECT 10
#define LDAC 8

void setup() {
 byte clr;