bartonjs Provide a low-level API for reading and writing PKCS#12 (PFX) files
This change adds two top-level classes, Pkcs12Info and Pkcs12Builder, for
reading existing file blobs and creating new ones.  These classes, and the
object model they expose/consume, are very raw on top of IETF RFC 7292.
Most user interaction with a PFX file/blob will continue to be with the
X509Certificate2 constructor (and Export method) and the
X509Certificate2Collection Import and Export methods.
Latest commit 6447734 Jul 14, 2018