adilanchian

// SPDX-License-Identifier: UNLICENSED

pragma solidity ^0.8.0;

import "hardhat/console.sol";

contract WavePortal {
    uint256 totalWaves;

    constructor() {

selftaught

Exploiting a Stack Buffer Overflow (return-to-libc attack)

A stack buffer overflow occurs when a program writes to a memory address on it's call stack outside of the intended structure / space.

In this walk-through, I'm going to cover the ret2libc (return-to-libc) method. This method of exploitation is great because it doesn't require the use of your typical shellcode. It involves making sys calls to the functions provided to us by libc (standard c library). We're going to use the system and exit sys calls for demonstration.

To have a good understanding about how stack overflows work, it's extremely helpful to know how stack data structures work, and more importantly - how the call stack works. For the sake of time, I'm not going to type out how these two things work in great detail. If you want to know how these work, I would recommend watching stack and call stack.

Creating a vulnerable binary to test

mak2014

How To Clone Scrypt Based Altcoins for Fun and Profit

Wait a second, why would you want to give out the secrets?!? Because its not a secret anymore and besides, why shouldn't everyone and their neighbors be able to create a plethora of these useless yet exciting math bits? The information in this article took me a few weeks to compile and what works for me is not guaranteed to work for you. Please use this guide as a starting point to learn a bit about C programming and compiling software.

JamesOBenson

Source: http://hints.macworld.com/article.php?story=20100113142633883

To have tab to complete from .ssh/config file in MacOS (Verified on MacOS 10.12.4), 

vi ~/.bash_profile (New file)

# Copy and paste this line
complete -o default -o nospace -W "$(/usr/bin/env ruby -ne 'puts $_.split(/[,\s]+/)[1..-1].reject{|host| host.match(/\*|\?/)} if $_.match(/^\s*Host\s+/);' < $HOME/.ssh/config)" scp sftp ssh

source ~/.bash_profile

leonardofed

A curated list of AWS resources to prepare for the AWS Certifications

A curated list of awesome AWS resources you need to prepare for the all 5 AWS Certifications. This gist will include: open source repos, blogs & blogposts, ebooks, PDF, whitepapers, video courses, free lecture, slides, sample test and many other resources.

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sugmak

#!/usr/bin/env perl

use strict;
use warnings;
use JSON;
use utf8;
use Encode;
# use Data::Dumper;

my $chrome_bookmark_file = $ENV{'HOME'}.'/Library/Application Support/Google/Chrome/Default/Bookmarks';