OpenSSL

Interact with the Primus HSM using the familiar OpenSSL API.

pkcs11-provider

The pkcs11-provider is based on the OpenSSLv3 provider API. It is recommended to use the provider for OpenSSL 3.0 and newer.

P11-kit

The P11-kit is based on the deprecated OpenSSL Engine API. Consider using the pkcs11-provider when working with OpenSSLv3.