chrdek’s gists

chrdek / ssl-sample2.js

Created June 13, 2020 19:59

Login server with basic secure cookie authentication and json file as data store (log reqs).

	var https = require('https');
	var fs = require('fs');
	var auth = require('basic-auth');
	var cookie = require('cookie');
	var signed = require('cookie-signature');
	const csvconv = require('csvtojson');
	const { parse } = require('json2csv');
	const express = require('express');
	const routing = express();

chrdek / client_connect.bat

Last active June 14, 2020 19:35

Client connection sample with https headers for self-signed cert.

curl -i https://localhost:443/loginconfig -1 -H "Cache-Control:no-cache" -H "Authorization:Basic cGFpcjAyOmRpY2ZlY2plZ2RqaGdmZWhqZmppYWNlZWFnYWNoYmFoYWNhaWo=" -H "Accept:*/*" -X GET --connect-timeout 3 -k

chrdek / scriptlets1.js

Created June 14, 2020 19:58

MongoDB cmd line sample code for bulk operations

	/* Get documents with specific name from collection */
	db.getCollection('TableName1').find({Name:"Type1"})

	/* Get all documents from specific collection */
	db.getCollection('TableName1').find({})

	/* Update one documemt field via upsert */
	db.TableName1.update({Name:{$eq:"Type1"}},
	{$set:{Id:"UPDATED1-1"}},
	{upsert:true})

chrdek / Gen-Human-Read-Pass.ps1

Created August 15, 2020 02:39

Several methods to generate passwords with powershell

	<# Methods for generating secure passwords with various types of security #>
	# Password length 10, alphanumeric with symbols
	$var = @("a","f","G","A","4""\","$","0","1","9","4","2",":F","3","..>","5","m","'","<",".","k","8","7","i",";","K","l","=","+"); $output="";
	0..10 \| %{ $output+=$var[$(Get-Random -Maximum 10)]; }


	# Password length 10, SHA-256 derived OTP
	(Get-Random) > "./tempcode.hash"; "$($((Get-FileHash -Path "./tempcode.hash").Hash)[0..10] + '')"-replace " ",([String]::Empty);

chrdek / gpioterm.sh

Last active August 15, 2020 17:24

Terminate process for pins from shell

	#!/bin/bash

	GPIO_PIN=10
	# stop gpio pins, relevant cmd process
	ctrl_c() {
	echo "0" > "/sys/class/gpio/gpio${GPIO_PIN}/value"
	echo $GPIO_PIN > /sys/class/gpio/unexport
	exit
	}

chrdek / DS0103EN-1-1-1-From-Problem-to-Approach-v2.0.ipynb

Created September 12, 2020 08:40

Created on Skills Network Labs

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chrdek / 12hr_to_24hr.js

Created October 12, 2020 17:54

Time Converter function (12Hr-24Hr format) using Javascript

	// This oneliner function converts 12-Hour time into its 24-Hour counterpart.
	// Examples (hh:mm:ss(PM/AM) to HH:MM:ss(24hour):
	// 12:00PM ->12:00, 12:00AM->00:00, 04:00PM -> 16:00

	function timeConversion(s) {
	return (s.includes("PM")) ?
	(s.replace(s.split(':')[0],(s.startsWith("12"))?s.split(':')[0]:(Number(s.split(':')[0])+12)+"")).replace("PM","") :
	(s.replace(s.split(':')[0],
	(s.startsWith("12"))?(s.split(':')[-1])\|\|"00":s.split(':')[0])
	.replace(s.split(':')[0],

chrdek / b64Enc_Dec.js

Created November 5, 2020 09:23

base64 encode, decode

	//Extend the String object with toBase64() and fromBase64() functions
	//ES6..
	String.prototype.toBase64 = function() {
	var basechars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
	return [...this].map(c=>c.charCodeAt()).map(n=> {
	return ((+n).toString(2).length < 8) ? "0".repeat(8-(+n).toString(2).length)+(+n).toString(2)
	:(+n).toString(2);
	}).join("")
	.replace(/(\d)(?=(?:\d{6})+$)/g,"$1 ")
	.split(" ")

chrdek / Modify_xls.ps1

Last active December 26, 2020 16:24

Add daily tasks in excel - with SIG (with DD/MM/YYYY)

	Function Modify-Excel([switch]$addSheet) {

	$defaultdir = "$env:USERPROFILE\Documents\Spreadsheet_1.xlsx";
	$xls = New-Object -ComObject Excel.Application; $xls.Visible = $false;

	$xlShiftDown = -4121;
	$fileModify = $xls.Workbooks.Open($defaultdir);

	# select latest/current working month ..
	$spreadSheet = $fileModify.ActiveSheet; # $fileModify.Worksheets \| ?{ $_.Name -ilike "*2020" } \| Select -Last 1

chrdek / Wipe-Data.ps1

Last active January 3, 2021 13:07

Confidential files data wipe using various data shredding methods.

	<#
	.SYNOPSIS
	USE AT OWN RISK AND WITH CAUTION
	Function used for byte-level information scrambling for most files (For example: zip,documents,plain text or pdf).

	.DESCRIPTION
	USE AT OWN RISK AND WITH CAUTION
	This function provides various methods of destroying the contents of a file, rendering it unreadable.
	It can either be used on text or other types of data file formats.
	Methods of removing data include XOR directly bytes in file, removing data by using source-dest. files

ChrDek chrdek