Robert Jordan trigger-segfault

MD5 Collision with CRC32 Preimage

Here's the scenario: We want to craft two different messages with the same MD5 hash, and a specific CRC32 checksum, simultaneously.

In other words, we want an MD5 collision attack and a CRC32 preimage attack.

This might seem like a contrived scenario, but it's exactly the one I faced while producing my PNG hashquine (Yes OK maybe that's also a contrived scenario, cut me some slack).

On its own, a CRC32 preimage attack is trivial. You can craft a 4-byte suffix that gives any message a specific checksum, calculated using a closed-form expression (which I am too lazy to derive, not even with assistance from Z3). It's not an attack per-se, since CRC32 was never meant to be cryptograpically secure in the first place.

ANSI Escape Sequences

Standard escape codes are prefixed with Escape:

Ctrl-Key: ^[
Octal: \033
Unicode: \u001b
Hexadecimal: \x1B
Decimal: 27

HTML Tags You Can Use on GitHub

Wherever HTML is rendered on GitHub (gists, README files in repos, comments on issues and pull requests, ...) you can use any of the HTML elements that GitHub Flavored Markdown (GFM) provides syntactic sugar for. You can either use the syntactic sugar that GFM (or other GitHub-supported markup language you're using) provides or, since Markdown can contain raw HTML, you can enter the HTML tags manually.

But GitHub also allows you to use a few HTML elements beyond what Markdown provides by entering the tags manually, and some of them are styled with CSS. Most raw HTML tags get stripped before rendering the HTML. Those tags that can be generated by GFM syntactic sugar, plus a few more, are whitelisted. These aren't documented anywhere that I can find. Here's what I've discovered so far:

`<details>` and `<summary>`

A `<detai

----- Tech -----

拡張現実【かくちょうげんじつ】 augmented reality, AR

投資家【とうしか】 investor

静的【せいてき】 static

Use curl to get the JSON response for the latest release
Use grep to find the line containing file URL
Use cut and tr to extract the URL
Use wget to download it

curl -s https://api.github.com/repos/jgm/pandoc/releases/latest \
| grep "browser_download_url.*deb" \
| cut -d : -f 2,3 \
| tr -d \" \

	// Thanks Reddit. <3 you all

	private static void ExecuteShit(string path) {
	var directories = Directory.GetDirectories(path);

	var strings = (from directory in directories select Path.GetFileName(directory) into d where d.StartsWith("#") select d.Substring(1)).OrderBy(f => f).ToList();

	var sb = new StringBuilder();

	foreach(var s in strings) {

	#!/usr/bin/env python

	"""
	An example of how to remove comments and trailing commas from JSON before
	parsing. You only need the two functions below, `remove_comments()` and
	`remove_trailing_commas()` to accomplish this. This script serves as an
	example of how to use them but feel free to just copy & paste them into your
	own code/projects. Usage::

	json_cleaner.py some_file.json

	243F6A8885A308D313198A2E03707344A4093822299F31D0082EFA98EC4E6C89
	452821E638D01377BE5466CF34E90C6CC0AC29B7C97C50DD3F84D5B5B5470917
	9216D5D98979FB1BD1310BA698DFB5AC2FFD72DBD01ADFB7B8E1AFED6A267E96
	BA7C9045F12C7F9924A19947B3916CF70801F2E2858EFC16636920D871574E69
	A458FEA3F4933D7E0D95748F728EB658718BCD5882154AEE7B54A41DC25A59B5
	9C30D5392AF26013C5D1B023286085F0CA417918B8DB38EF8E79DCB0603A180E
	6C9E0E8BB01E8A3ED71577C1BD314B2778AF2FDA55605C60E65525F3AA55AB94
	5748986263E8144055CA396A2AAB10B6B4CC5C341141E8CEA15486AF7C72E993
	B3EE1411636FBC2A2BA9C55D741831F6CE5C3E169B87931EAFD6BA336C24CF5C
	7A325381289586773B8F48986B4BB9AFC4BFE81B6628219361D809CCFB21A991

	using System;
	using System.Collections.Generic;
	using System.IO;
	using System.Linq;
	using System.Text;
	using DataHelper;

	namespace CST_Exporter
	{
	internal class Program

Robert Jordan trigger-segfault

MD5 Collision with CRC32 Preimage

ANSI Escape Sequences

HTML Tags You Can Use on GitHub

<details> and <summary>

`<details>` and `<summary>`