What crypto engine does the Directory Server use?
Directory server uses the Network Security Services (NSS) library available from the Mozilla Project. NSS supports cross-platform development of security-enabled server applications. Applications built with NSS can support PKCS #5, PKCS #7, PKCS #11, PKCS #12, S/MIME, TLS, SSL v2 and v3, X.509 v3 certificates, and other security standards. The Fedora Directory Server binary package includes all of the NSS command line tools like certutil and modutil for key and certificate management.