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RE: Correct definition of ContentInfo in CMS-10

Darren Harter <dharter@sapher.com> Tue, 23 February 1999 09:04 UTC

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From: Darren Harter <dharter@sapher.com>
To: "'pgut001@cs.auckland.ac.nz'" <pgut001@cs.aucKland.ac.nz>, "ietf-smime@imc.org" <ietf-smime@imc.org>, "ross@jgross.demon.co.uk" <ross@jgross.demon.co.uk>
Subject: RE: Correct definition of ContentInfo in CMS-10
Date: Tue, 23 Feb 1999 08:41:07 -0000
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Peter,

You would be correct if we were talking about PKCS#7 where ContentInfo was used within SignedData to carry the content.  This would clearly have to be optional in the detached signature case.  But, in CMS we now only use ContentInfo for carrying SignedData, EnvelopedData etc., so even when detached signatures are being used the Content field of ContentInfo must be present to carry your SignedData.

I agree with John and other posters that the definition in the main body of the document is correct.  Content is not optional.

Regards,

Darren

--------------------------------------------------------------------------------
Darren Harter BSc (Hons) CEng MBCS
Entegrity Solutions
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-----Original Message-----
From:	Peter Gutmann [SMTP:pgut001@cs.auckland.ac.nz]
Sent:	Tuesday, February 23, 1999 3:46 AM
To:	ietf-smime@imc.org; ross@jgross.demon.co.uk
Subject:	Re: Correct definition of ContentInfo in CMS-10
 
The content is optional.  Think about how detached sigs work.
 
Peter.

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