Edward D'Ores edores

Introduction
Standards
Common combinations
Conversion
Verification/Inspection
Tips for recognising

Introduction

It happens that there are many standards for storing cryptography materials (key, certificate, ...) and it isn't always obvious to know which standard is used by just looking at file name extension or file content. There are bunch of questions on stackoverflow asking about how to convert from PEM to PKCS#8 or PKCS#12, while many tried to answer the questions, those answers may not help because the correct answer depends on the content inside the PEM file. That is, a PEM file can contain many different things, such as an X509 certificate, a PKCS#1 or PKCS#8 private key. The worst-case scenario is that someone just store a non-PEM content in "something.pem" file.

	// Array class vs Arrays class

	// Importing both classes from resprective packages
	import java.lang.reflect.Array;
	import java.util.Arrays;

	public class A {
	public static void main(String[] args)
	{
	// Getting the size of the array

	// Method overriding in java

	class Parent {
	void show() { System.out.println("Parent's show()"); }
	}

	class Child extends Parent {
	// This method overrides show() of Parent
	@Override void show()
	{

	<!doctype html>
	<html lang="en">
	<head>
	<meta charset="utf-8">
	<title>HTML5 Starter</title>
	<link rel="icon"
	href="data:image/svg+xml,<svg xmlns=%22http://www.w3.org/2000/svg%22 viewBox=%220 0 100 100%22><text y=%22.9em%22 font-size=%2290%22>🐣</text></svg>">
	<!-- <link rel="stylesheet" href="styles.css"> -->
	<!-- <style></style> -->
	</head>

	git reset HEAD~1
	git add D
	git commit --amend -m ‘add C and D files’
	git add E
	git commit -m ‘add E file’
	git rebase --continue