RE: Determining if a message has multiple layers without processing any of them

Russ Housley <housley@vigilsec.com> Thu, 11 September 2003 01:14 UTC

Message-Id: <5.2.0.9.2.20030910163325.048e8ea8@mail.binhost.com>
Date: Wed, 10 Sep 2003 16:37:59 -0400
To: Darrell.Dykstra@entrust.com, ietf-smime@imc.org
From: Russ Housley <housley@vigilsec.com>
Subject: RE: Determining if a message has multiple layers without processing any of them
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Darrell:

Please take a look at RFC 2634, section 2.9.  The outer-most CMS wrapper 
should tell what content type is contained in the inner-most wrapper.  Does 
this help, even though it is much delayed?

Russ


-----Original Message-----
From: owner-ietf-smime@mail.imc.org [mailto:owner-ietf-smime@mail.imc.org]
Sent: Saturday, June 14, 2003 7:43 AM
To: 'ietf-smime@imc.org'
Subject: Determining if a message has multiple layers without processing 
any of them

Hello,

I am currently attempting to determine if there is anything in the S/MIME 
standard that would allow me to determine if a message was, for example, 
signed then encrypted, without processing any of the security layers.

My understanding of the smime-type parameter is that it only applies to the 
current layer of security, so for example, a message that was signed and 
then encrypted will have an outer smime-type of enveloped-data with no clue 
that there is a signature layer within.

Any insight into this is much appreciated.

Thanks,
Darrell

RE: Determining if a message has multiple layers … Russ Housley