EJBCA® – Open-source public key infrastructure (PKI) and certificate authority (CA) software.

Heimdal

opinionated TLS client & server PKI management tool

Use easy-rsa to build and manage a PKI/mTLS CA

Microsoft PIN Tool modified for ActivClient PKI smartcards.

A command line tool for Certificate Transparency

Android PIN Unblocker :: Generate unblock codes for PKI smartcards using your Admin key and phone.

The CSR Generator is a Go package that provides functionality for generating Certificate Signing Requests (CSRs) and private keys. It simplifies the process of creating CSRs with specified common names and Subject Alternative Names (SANs).

Concept Project based on PKI-Based Secure Email Communication System

Scripts for creating an X.509 CA and using it to create an arbitrary number of client and server certificates

Securely sign and verify documents using Public Key Infrastructure (PKI). Whether you’re handling contracts, legal agreements, or sensitive data, our API ensures robust security and compliance. Features: Digital Signatures, certificate management, hash algorithms, timestamping, audit trails.

A simple tool written in Go to find out which of your OpenSSL PKI Certificates is expired (soon)

The Lost Art of the Makefile: Simple OpenSSL PKI sharing for small teams