CSP is a simple PKI toolkit.
Certificate Service Provider is a perl wrapper around openssl that allows you to run multiple simple certificate authorities (CAs). CSP is designed to be simple (almost to a fault) and is ideally suited to small
PKIs (< 1000 entities) where security is paramount. CSP is meant to be run on isolated, offline computers while still allowing CRLs and certificate repositories to be easily published.
A recent version of openssl is required aswell as several perl packages listed in Makefile.PL (all of them available through cpan).