openssl-example

This repository contains examples to show how to use the OpenSSL C API.

Build

cmake -B build
cmake --build build
./build/create_test_pki

Glossary

Abbreviation	Description
X.509	A standard defining the format of public key certificates
CA	Certificate Authority
CSR	Certificate Signing Request
CRL	Certififcate Revocation List
CMS	Cryptographic Message Syntax
PKI	Public Key Infrastructure

Examples

• compute SHA256 checksumn
• create a self-signed certficate
• create a certificate signing request (CSR)
• sign a CRS
• create a certificate revokation list (CRL)
• verify a certificate
• create a digital signature using cryptographic message syntax (CMS)
• verify a CMS signature

Remarks

• Some of the examples make use of a test PKI.
• The purpose of this repository is to give an overview about OpenSSL's C API. Therefore, there is almost no error handling contained in the examples.

Depedencies

• OpenSSL>3.0