PKI Management for node-opcua

node-opcua-pki is a comprehensive library for managing Public Key Infrastructures (PKI), Certificate Authorities (CA), and OPC UA certificates, offering both a powerful command-line interface (CLI) and a programmatic API. Designed specifically for the node-opcua ecosystem, it provides full lifecycle management for certificates, including support for intermediate CAs, OpenSSL 3.5.x compatibility, and a robust PFX (PKCS#12) toolbox. The current stable version is 6.13.0, with frequent minor and patch releases demonstrating active maintenance and continuous feature development. Key differentiators include its deep integration with OPC UA standards, a rich set of CLI commands for common PKI operations, and specialized features like an in-memory DER/PEM buffer API for `CertificateAuthority` operations and a certificate database for querying issued certificates. It serves as a critical component for securing OPC UA applications.