kategray’s gists

kategray / build_universal.sh

Created April 13, 2021 15:21

Build universal (x86_64 + arm64) x264 libraries on an intel x86 Mac

	#!/bin/bash
	#
	# build-universal.sh
	#
	# Compile a universal x264 binary on OS X (intel).
	#
	# Requires nasm. Install with homebrew: 'brew install nasm'
	#

	CONFIGURE_OPTS='--enable-shared --enable-static'

kategray / convert.ps1

Last active April 9, 2021 23:44

Convert a cisco PKCS12 (PEM/text format) to a binary P12 for OpenSSL

	#
	# Opens up keypair.txt and writes to keypair.p12
	#

	# Skip the first and last lines, and trim any whitespace
	$text = (Get-Content keypair.txt \| Select-Object -skip 1 \| Select-Object -skiplast 1).Trim()

	# Convert from Base64 to Bytes
	$bytes = [System.Convert]::FromBase64String($text)

kategray / .zshrc

Last active April 12, 2024 09:27

M1 dual homebrew (x86_64 and arm64) setup

	#
	# .zshrc for Mac M1 chips to handle both x86_64 and arm64 homebrew
	#
	# Be sure to remove .zprofile in order to prevent invalid paths, and
	# remove /usr/local/bin from /etc/paths.
	#
	# Install both arch homebrew versions with:
	# arch -x86_64 /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"
	# arch -arm64 /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"

kategray / createmrz.php

Created October 13, 2020 11:05

Create a MRZ for ID cards

	#!/usr/bin/env php
	<?php

	// Line 1
	$document_number = rand (0, 1000000000); // 9 Digits
	$country = 'XXX'; // Unspecified
	$document_type = 'I'; // ID Card
	$document_subtype = '<'; // Generally 'D', or '<' for ID
	$line1_optional = 'COMPANY'; // Optional, 15 chars

kategray / pwcheck.php

Created October 5, 2020 03:26

Check a password against pwncheck in PHP.

	<?php
	#!/usr/bin/env php

	$password = 'password';
	$hash = sha1($password);
	$truncated = substr ($hash, 0, 5); // First 5 characters
	$checkValue = substr ($hash, 5); // Rest of the characters

	$url = sprintf ('https://api.pwnedpasswords.com/range/%s', $truncated);
	echo (sprintf ("Getting hashes from URL %s.\n", $url));

kategray / notes.md

Created April 24, 2019 16:30

Interview notes

Tools

DOMAIN='codebykate.com'
HOST='codebykate.com'
PROTO='https'
APP_PATH='/'
IP=`dig +short ${HOST}`

kategray / fuse.txt

Created April 24, 2019 00:08

NXP J2A040 Fusing

	# Information in this script was obtained from public sources, and not under NDA with NXP.

	# GPShell style APDU commands, but you should be able to adapt it to anything that can send raw APDU's to the card
	# Our TK Key
	00A4040010C238E449F725B1510EAA699550CABA16

	# Reset card to factory defaults - THIS WILL WIPE OUT ALL APPLETS INSTALLED
	00F00000

	# Set the Card to use T=1 transmission mode

kategray / clean.sh

Created February 14, 2019 09:40 — forked from gwpl/clean.sh

`openssl pkeyutl` how to: -sign -verify -encrypt -decrypt , using openssh keys snippets/examples

rm -v pub.pkcs8 test.sign test.txt.decrypted test.txt.encrypted

kategray / dld2ihex.php

Created January 26, 2019 16:37

Convert a Cypress .dld format firmware to an Intel Hex firmware

	#!/usr/bin/env php
	<?php
	/**
	* Convert a cypress DLD file to an intel hex file for analysis purposes.
	*
	* Cypress DLD files start with the string "FF380001020304050607".
	*
	* You can produce a binary output using something like:
	* ./dld2ihex.php [file].dld > [file.ihex]
	* objcopy -I ihex [file].ihex -O binary [file].bin

kategray / xbee.c

Created September 18, 2018 11:57

XBEE Packet Calculation

	#include <stdio.h>
	#include <stdint.h>

	#define CRC_LOCATION 13
	#define DATA_START 3

	int main(void) {
	// your code goes here
	uint8_t packet[] = {0x7E, 0x00, 0x0A, 0x01, 0x01, 0x50, 0x01, 0x00, 0x48, 0x65, 0x6C, 0x6C, 0x6F, 0X00};