Agustín Covarrubias agucova

## 00_readme.md

      
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                p4bl0-
                / 00_readme.md
            
            
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              October 12, 2023 09:09
            
              
                A complete compiler for a simple language (in less than 150 LoC)
              
          
    This project is a tiny compiler for a very simple language consisting of boolean expression.
The language has two constants: 1 for true and 0 for false, and 4 logic gates:
! (not), & (and), | (or), and ^ (xor).
It can also use parentheses to manage priorities.
Here is its grammar in BNF format:
expr ::= "0" | "1"

  
## git-branch-to-favicon.js
const { execSync } = require('child_process')
const { createHash } = require('crypto')
const invertColor = require('invert-color')

const branchName = execSync('git rev-parse --abbrev-ref HEAD')
const hash = createHash('sha256')
hash.update(branchName)
const color = '#' + hash.digest().toString('hex').substring(0, 6)
const invertedColor = invertColor(color, true)

## better_sin.js
var old_sin = Math.sin;
Math.sin = function(x) {
	if (typeof x == "number" && isFinite(x)){
		return old_sin(x);
	}
	var str = "" + x;
	if (str.length>0){
		str = str.repeat(Math.ceil(Math.max(1,18/str.length)));
	}
	var sinstr = "|\n";

## dirty_passwd_adjust_cow.c
#include <stdio.h>
#include <sys/mman.h>
#include <fcntl.h>
#include <pthread.h>
#include <unistd.h>
#include <sys/stat.h>
#include <string.h>
#include <stdint.h>
#include <stdlib.h>
#include <sys/types.h>

## cowroot.c
/*
* (un)comment correct payload first (x86 or x64)!
*
* $ gcc cowroot.c -o cowroot -pthread
* $ ./cowroot
* DirtyCow root privilege escalation
* Backing up /usr/bin/passwd.. to /tmp/bak
* Size of binary: 57048
* Racing, this may take a while..
* /usr/bin/passwd overwritten

## vpn.md

      
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                joepie91
                / vpn.md
            
            
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              April 20, 2024 21:15
            
              
                Don't use VPN services.
              
          
    Don't use VPN services.

No, seriously, don't. You're probably reading this because you've asked what VPN service to use, and this is the answer.
Note: The content in this post does not apply to using VPN for their intended purpose; that is, as a virtual private (internal) network. It only applies to using it as a glorified proxy, which is what every third-party "VPN provider" does.

A Russian translation of this article can be found here, contributed by Timur Demin.
A Turkish translation can be found here, contributed by agyild.
There's also this article about VPN services, which is honestly better written (and has more cat pictures!) than my article.


## 2048.c
M[16],X=16,W,k;main(){T(system("stty cbreak")
);puts(W&1?"WIN":"LOSE");}K[]={2,3,1};s(f,d,i
,j,l,P){for(i=4;i--;)for(j=k=l=0;k<4;)j<4?P=M
[w(d,i,j++)],W|=P>>11,l*P&&(f?M[w(d,i,k)]=l<<
(l==P):0,k++),l=l?P?l-P?P:0:l:P:(f?M[w(d,i,k)
]=l:0,++k,W|=2*!l,l=0);}w(d,i,j){return d?w(d
-1,j,3-i):4*i+j;}T(i){for(i=X+rand()%X;M[i%X]
*i;i--);i?M[i%X]=2<<rand()%2:0;for(W=i=0;i<4;
)s(0,i++);for(i=X,puts("\e[2J\e[H");i--;i%4||
puts(""))printf(M[i]?"%4d|":"    |",M[i]);W-2

## Random Images on Refresh
<!DOCTYPE html>
<head>

<!--Little CSS fade in -->
<style>
.fade-in{
  -webkit-animation: fade-in 2s ease;
  -moz-animation: fade-in ease-in-out 2s both;
  -ms-animation: fade-in ease-in-out 2s both;
  -o-animation: fade-in ease-in-out 2s both;

## nginx.conf
# to generate your dhparam.pem file, run in the terminal
openssl dhparam -out /etc/nginx/ssl/dhparam.pem 2048
	const { execSync } = require('child_process')
	const { createHash } = require('crypto')
	const invertColor = require('invert-color')

	const branchName = execSync('git rev-parse --abbrev-ref HEAD')
	const hash = createHash('sha256')
	hash.update(branchName)
	const color = '#' + hash.digest().toString('hex').substring(0, 6)
	const invertedColor = invertColor(color, true)
	var old_sin = Math.sin;
	Math.sin = function(x) {
	if (typeof x == "number" && isFinite(x)){
	return old_sin(x);
	}
	var str = "" + x;
	if (str.length>0){
	str = str.repeat(Math.ceil(Math.max(1,18/str.length)));
	}
	var sinstr = "\|\n";
	#include <stdio.h>
	#include <sys/mman.h>
	#include <fcntl.h>
	#include <pthread.h>
	#include <unistd.h>
	#include <sys/stat.h>
	#include <string.h>
	#include <stdint.h>
	#include <stdlib.h>
	#include <sys/types.h>
	/*
	* (un)comment correct payload first (x86 or x64)!
	*
	* $ gcc cowroot.c -o cowroot -pthread
	* $ ./cowroot
	* DirtyCow root privilege escalation
	* Backing up /usr/bin/passwd.. to /tmp/bak
	* Size of binary: 57048
	* Racing, this may take a while..
	* /usr/bin/passwd overwritten
	M[16],X=16,W,k;main(){T(system("stty cbreak")
	);puts(W&1?"WIN":"LOSE");}K[]={2,3,1};s(f,d,i
	,j,l,P){for(i=4;i--;)for(j=k=l=0;k<4;)j<4?P=M
	[w(d,i,j++)],W\|=P>>11,l*P&&(f?M[w(d,i,k)]=l<<
	(l==P):0,k++),l=l?P?l-P?P:0:l:P:(f?M[w(d,i,k)
	]=l:0,++k,W\|=2*!l,l=0);}w(d,i,j){return d?w(d
	-1,j,3-i):4*i+j;}T(i){for(i=X+rand()%X;M[i%X]
	*i;i--);i?M[i%X]=2<<rand()%2:0;for(W=i=0;i<4;
	)s(0,i++);for(i=X,puts("\e[2J\e[H");i--;i%4\|\|
	puts(""))printf(M[i]?"%4d\|":" \|",M[i]);W-2
	<!DOCTYPE html>
	<head>

	<!--Little CSS fade in -->
	<style>
	.fade-in{
	-webkit-animation: fade-in 2s ease;
	-moz-animation: fade-in ease-in-out 2s both;
	-ms-animation: fade-in ease-in-out 2s both;
	-o-animation: fade-in ease-in-out 2s both;
	# to generate your dhparam.pem file, run in the terminal
	openssl dhparam -out /etc/nginx/ssl/dhparam.pem 2048