2. Sources

In this chapter you download the OpenSSL source code from GitHub.

Overview

OpenSSL is developed on GitHub: https://github.com/openssl/openssl

There are two ways to get the code:

Git Clone (recommended) - All versions available, easy to update
ZIP Download - Simpler, but without version history

Detailed Guides

Clone GitHub Repository - Step by step with Git
Directory Structure - What's where in the source code?

Quick Guide

# 1. Create project folder
mkdir D:\Projects\openssl-3.6.0
cd D:\Projects\openssl-3.6.0
 
# 2. Clone OpenSSL (tag v3.6.0)
git clone --depth 1 --branch openssl-3.6.0 https://github.com/openssl/openssl.git src
 
# 3. Verify
cd src
git describe --tags
# Expected output: openssl-3.6.0

Which Version?

Version	Status	Post-Quantum
3.6.0	Current	✅ ML-DSA, ML-KEM
3.5.x	Stable	⚠️ Experimental
3.4.x	LTS	❌ No
3.0.x	LTS	❌ No

For Post-Quantum cryptography you need at least version 3.6.0!

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Wolfgang van der Stille @ EMSR DATA d.o.o. - Post-Quantum Cryptography Professional