Triple Wrapping Survey

[Russ Housley <housley@xxxxxxxxxx>]

I have a few questions for implementors.  First some background, then the 
questions.

The use of S/MIMEv3 Triple Wrapping leads to the incorporation of four MIME 
encodings.  If each of these encodings uses Base64, then the overhead is 
huge.  I am interested in ways to reduce the overhead, hopefully without 
hurting IMAP usability.

1.  Can your implementation handle
	MIME( SignedData (EnvelopedData (SignedData ( MIME ))) ?

The outer SignedData has the OID for EnvelopedData in the content type, not 
id-data.
The EnvelopedData has the OID for SignedData in the content type, not id-data.
The inner Signed Data has the id-data OID in the content type.

2.  Can your implementation handle MIME without Base64 encoding?  I am 
interested in using "binary" instead of Base64 to reduce the overhead.

Russ