OpenSC provides a set of libraries and utilities to access smart cards.
It mainly focuses on cards that support cryptographic operations. It
facilitates their use in security applications such as mail encryption,
authentication, and digital signature. OpenSC implements the PKCS#11
API. Applications supporting this API, such as Mozilla Firefox and
Thunderbird, can use it. OpenSC implements the PKCS#15 standard and
aims to be compatible with every software that does so, too.