SoftHSM is an implementation of a cryptographic store accessible through a
PKCS#11 interface. You can use it to explore PKCS#11 without having a
Hardware Security Module. It is being developed as a part of the OpenDNSSEC
project. SoftHSM uses Botan for its cryptographic operations.

Homepage:
https://www.opendnssec.org/softhsm/
