Chris breadchris

All the ways to loop

Warmup

Follow the directions in the code. Use the Printing out a grocery list code as a template to write your for loop

Printing out a grocery list

Copy this code into your project
Add your own grocery item to the list
Run the code to see if your grocery item gets printed out

For context, I am building an open source recipe site that addresses the issues that I tend to find people having when attempting a recipe. I would love to hear everyone's thoughts on this topic!

Two years ago, I was using canned chili and soylent as input to my biological computer (ie. I ate food, I didn't make food). Once I was exposed to resources like The Food Lab and SFAH, like many of you here, my life changed. I was repulsed by dishes that were not treated with care, and my mind's eye was opened to this new state of being. Chicken that didn't feel like rubber, eggs that weren't stink bombs, salad that I would actually look forward to eating. I evangelized The Food Lab to my friends and family, I bought them the book and delivered it to them, I did everything short of going to their door and asking "Do you have 10 minutes to talk about our Lord and Savior Kenji Lopez-Alt?". But there was no crispy oven potatoes made, or dead simple spatchcock chicken. Why wouldn't people read this damn book?

I reali

Backdoor CTF 2015 team Writeup

TL;DR

Format string

Given that this challenge was 600 points, I expected to be challenged with this one. But with 91 solves I think the people at SDSLabs kinda messed up on the points for this one lol.

Checking out what type of file we were dealing with here:

[~/Documents/CTFs/backdoor]$ file team

	<!DOCTYPE html>
	<html>
	<!--So long and thanks for all the fish-->
	<head>
	<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
	<title>Pocket Export</title>
	</head>
	<body>
	<h1>Unread</h1>
	<ul>

	tab_depth = 0


	def log(s=None, **kwargs):
	global tab_depth
	msg = s if s is not None else ", ".join(["{} == {}".format(k, v) for k, v in kwargs.items()])
	print("\t" * tab_depth + msg)

	def perms(n, l):
	global tab_depth

	void randop() {
	munmap((void*)0x0F000000, MAPLEN);
	void buf = mmap((void)0x0F000000, MAPLEN, PROT_READ\|PROT_WRITE, MAP_ANON\|MAP_PRIVATE\|MAP_FIXED, 0, 0);
	unsigned seed;
	if(read(0, &seed, 4) != 4) return;
	srand(seed);
	for(int i = 0; i < MAPLEN - 4; i+=3) {
	(int )&((char*)buf)[i] = rand();
	if(i%66 == 0) ((char*)buf)[i] = 0xc3;
	}

	//
	// challenge_6.c
	// Matasano Crypto Challenge

	#include <stdio.h>
	#include <stdlib.h>
	#include <string.h>
	#include <unistd.h>

	char* HEX_LOOKUP = "0123456789abcdef";