redspider

Demonstration of a partial tar extraction.

First we set up a dir for testing:

$ ls -lR
.:
total 4
drwxr-xr-x 5 richard richard 4096 2012-07-31 17:46 root_dir

redspider

def permute(items):
    """
    Return the permutations of the provided set

    :param items: Set of items to permute
    :type items: set
    :return: list of permutations
    :rtype: list
    """

redspider

    var compactListingDirective = m.directive('compactListing', function (listingService) {
        return {
            replace: true,
            scope: {
                listing: '=compactListing'
            },
            controller: function ($scope, $attrs, listingService) {
                $scope.listingService = listingService;
            },
            templateUrl: TMPL.compact_listing

redspider

We have a sequence of IDs, 1, 2, 3, 4... that are references to data. We wish to use these IDs in a URL, however we do not want them to be iterable - that is, given 3, it should not be possible to derive the URL for 2 or 4.

Our proposed solution is to generate the URL as follows:

/<hmac>-<id>/

Where hmac consists of a SHA256 HMAC of the ID using a secret key. We then verify the hmac when the URL is used.

redspider

import socket

s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
s.sendto('PING', ('127.0.0.1',540))

data, addr = s.recvfrom(1024)
print data, addr

redspider

#!/usr/bin/env python

# Test code for Adafruit LED Pixels, uses hardware SPI

import RPi.GPIO as GPIO, time, os

DEBUG = 1
GPIO.setmode(GPIO.BCM)

redspider

import time, os

try:
    import RPi.GPIO as GPIO
except ImportError:
    GPIO = None


class Color(object):
    def __init__(self, r, g, b):

redspider

import random
import time, os

try:
    import RPi.GPIO as GPIO
except ImportError:
    GPIO = None

try:
    import xtermcolor

redspider

import random
import time, os

try:
    import RPi.GPIO as GPIO
except ImportError:
    GPIO = None

try:
    import xtermcolor

redspider

import math
import random
import time, os

try:
    import RPi.GPIO as GPIO
except ImportError:
    GPIO = None

try: