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[ietf-dkim] Output summary - Mandatory Outputs

2011-04-28 14:51:07

Rolf Wrote:
As the From: address is mandatory input for the signature, it may be a
logical step to also make it mandatory in the output?

Murray Responded:
Given the above, do we still need to?

Hector Santos responded:
To be more DKIM Mail Integration Consistent and Complete - yes.

See RFC5585 Figure 1 DKIM Service Architecture. The AUID is needed for 
the major CSP (Checking Signing Practice) black box flow in the DKIM 
design.

Follow up:

To illustrate this in RFC5585 by labeling the inputs required:


                     |
                     |- RFC5322 Message
                     V
      +--------------------------------+
      |  Message Signed?               |
      +-----+--------------------+-----+
            |yes                  |no
            |                     |
            |SDID/AUID            |AUID
            |                     |
            V                     |
      +-------------+ SDID/AUID   |
      |  Verify     +---------+   |
      |  Signature  |         |   |
      +------+------+         |   |
         pass|            fail|   |
             |SDID            |   |
             V                |   |
      +-------------+         |   |
      | Assessments |         |   |
      |             |         V   V
      +--------+----+      +-------+
          |    |          / Check   \
          |    +--SDID-->/  Signing  \
          |             /   Practices \
          |            +-------+-------+
          |                    |
          V                    V


As you can see, per RFC5585, both SDID and AUID are mandatory DKIM 
outputs.

-- 
Hector Santos, CTO
http://www.santronics.com


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