OpenSSL
Cryptography · Intermediate
Inspect certificates, generate keys and test TLS.
Knowledge reference only. Prefer in-browser Labs first. Use this tool only on systems you own or have written authorization to test.
What to learn
- Core workflow and interface
- Reading and interpreting output
- Key configuration options
- Integrating into a professional workflow
Legitimate use
OpenSSL is used by professionals for legitimate defense, testing and research.
Official docs →Example commands (lab VMs only)
- openssl s_client -connect localhost:443Safe example against your own lab data or localhost