ssl.md

Sidepit Cryptography Tutorial - OpenSSL

Overview

What is OpenSSL?

OpenSSL is a cryptographic library and command-line tool that helps secure communications over computer networks. It's used by many applications to encrypt and decrypt data, and generate private keys.

Navigate into the ssl folder and Generate a key pair

cd ssl
openssl genrsa -out private_key.pem 2048
openssl rsa -in private_key.pem -pubout -out public_key.pem

Create and sign a message

Create a file named message.txt, add your message, and then run:

openssl dgst -sha256 -sign private_key.pem -out signature.bin message.txt

Verify a signature

openssl dgst -sha256 -verify public_key.pem -signature signature.bin message.txt

Hash a message

openssl dgst -sha256 message.txt

Generate a secure password

openssl rand -base64 16

For more info on OpenSSL, please visit the official OpenSSL documentation.