vsergeev

Busybox "Embedded Linux from Scratch" Distribution for the Beaglebone

Prepare your Build Sandbox

$ mkdir -p beaglelfs/{sources,rootfs_install,boot_mnt,rootfs_mnt}

Acquire an ARM Toolchain

Download the latest i686 Binary TAR of the ARM GNU/Linux (glibc-based) Lite Toolchain:

daeken

• Intro
  • Mindset
    • Break all the things
  • Understanding is key
    • Security people are the most diverse in tech for that reason
• Web security
  • Tools
    • Burp
  • XSS
  • CSRF

17twenty

/*
 * Device Tree Source for AM33XX SoC
 *
 * Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com/
 *
 * This file is licensed under the terms of the GNU General Public License
 * version 2.  This program is licensed "as is" without any warranty of any
 * kind, whether express or implied.
 */

fkautz

package main

import (
	"bytes"
	"fmt"
	"github.com/gorilla/mux"
	grpc "github.com/gorilla/rpc"
	"github.com/gorilla/rpc/json"
	"log"
	"net/http"

Snaipe

Please note that the article is now on my website, and even though I am still working on it, any feedback is appreciated. Thanks for reading !

On the Quest of recoding malloc(3)

Back when I did not know anything about programing and started to learn C, I was first introduced to pointers (and other dreaded horrors that made me curl into a corner and cry) and dynamic memory in general.

I was baffled, troubled, yet fascinated by the basic explanation on how memory worked, and started to dread the time where I would need to manually create my char arrays for each and every sentences of my program; right before learning about string literals and feeling like an idiot.

It was then where I was learning about memory allocation and came upon a function that I would call for long the "magic function" : malloc. Magic, because at that point I didn't know how it worked, let alone knew anything about memory other that it was a "chain of boxes for numbers".

17twenty

/* gcc -std=c99 due to loop initialiser - stupid GCC defaulting to C89 :( */
#include <stdio.h>

#define ARRAY_SIZE(x) \
        ((sizeof(x) / sizeof(x[0])))

void count_and_process_items(unsigned int (*array)[10])
{
        for (int i = 0; i < ARRAY_SIZE(*array); ++i) {
                printf("Item %d = %d\n", i, (*array)[i]);

17twenty

Here are the vector methods and their slice-manipulation analogues:

AppendVector

a = append(a, b...)

Copy

b = make([]T, len(a))

17twenty

package main

import (
	"fmt"
	"log"
)

type Node struct {
	left  *Node
	right *Node

Arinerron

android.permission.ACCESS_ALL_DOWNLOADS
android.permission.ACCESS_BLUETOOTH_SHARE
android.permission.ACCESS_CACHE_FILESYSTEM
android.permission.ACCESS_CHECKIN_PROPERTIES
android.permission.ACCESS_CONTENT_PROVIDERS_EXTERNALLY
android.permission.ACCESS_DOWNLOAD_MANAGER
android.permission.ACCESS_DOWNLOAD_MANAGER_ADVANCED
android.permission.ACCESS_DRM_CERTIFICATES
android.permission.ACCESS_EPHEMERAL_APPS
android.permission.ACCESS_FM_RADIO

jduckles

#!/bin/bash

# Make a PDF look scanned. 
# Extracted from https://github.com/baicunko/scanyourpdf and modified for smaller output files (compression lower density).

INPUT_FILE=$1
/usr/local/bin/convert -density '80' ${INPUT_FILE}  -colorspace 'gray' -linear-stretch '3.5%x10%' \
	-blur '0x0.5' -attenuate '0.25' +noise  Gaussian -rotate 0.5 \
    -compress lzw -quality 50  scanned_${INPUT_FILE}