Helper Library for the Use with Smart Cards and the PKCS#11 API
pkcs11-helper allows using multiple PKCS#11 providers at the same
time and selecting keys by id, label or certificate subject.
Besides it covers the following topics: * Handling card removal
and card insert events
* Handling card re-insert to a different slot
* Supporting session expiration serialization
* and much more All this is possible using a simple API.