Links for pysmime
pysmime-0.1.0.tar.gz
http://chandlerproject.org/bin/view/Projects/MeTooCrypto
http://svn.osafoundation.org/m2crypto/trunk/doc/howto.smime.html
http://www.heikkitoivonen.net/m2crypto/api/
https://www.gnu.org/licenses/gpl.html
https://www.ietf.org/rfc/rfc3851.txt
https://www.opensc-project.org/opensc/wiki/engine_pkcs11
https://www.openssl.org/docs/apps/smime.html