ietf-smime
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RE: RFC2632bis and subjectAltName

2003-07-29 15:07:38

Russ,

There was a big discussion about #1. -- It is a question not a
statement.  The result was that this should not be required (at least
for non e-mail applications).

jim

-----Original Message-----
From: owner-ietf-smime(_at_)mail(_dot_)imc(_dot_)org 
[mailto:owner-ietf-smime(_at_)mail(_dot_)imc(_dot_)org] On Behalf Of Russ 
Housley
Sent: Tuesday, July 29, 2003 2:08 PM
To: Blake Ramsdell; ietf-smime(_at_)imc(_dot_)org
Subject: RE: RFC2632bis and subjectAltName



Blake:

I do not think that the specification does #1.  SHOULD is 
very different 
than "required."

Russ


At 02:04 PM 7/29/2003 -0700, Blake Ramsdell wrote:
-----Original Message-----
From: owner-ietf-smime(_at_)mail(_dot_)imc(_dot_)org 
[mailto:owner-ietf-smime(_at_)mail(_dot_)imc(_dot_)org] On Behalf Of Russ 
Housley
Sent: Tuesday, July 29, 2003 9:14 AM
To: ietf-smime(_at_)imc(_dot_)org
Subject: RFC2632bis and subjectAltName

The document says:

    The email address SHOULD be in the subjectAltName extension

This is exactly the same thing that RFC 2632 says.

If the certificate does not bind the public key to the email 
address, how is this done?  Should we mandate an alternate 
mechanism?  Or, should we
change "SHOULD" to "MUST?"

I think that the current spec tries to address at least two issues 
here:

1. Is it required that an email address be present in the certificate

2. If the email address is present, where should it be 
located (subject 
DN vs. subjectAltName)

Are you asking about:

3. How do we understand if the CA was putting the email 
address in the 
certificate purely for informational reasons vs. actually doing some 
work to make sure that the public key "belongs" to that email address

If so, I have no idea -- it's "do what PKIX says" in this case.

Blake



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