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Re: [ietf-dkim] versions, Where is the formal definition of DKIM-Signature?

2018-02-08 12:56:15

True, but not very interesting.  In my spamassassin example, the outside code knows nothing about DKIM versions, it just sees a dkim-signature header and sends it to the DKIM library.

Oh.  So v= doesn't dispatch to different code.

BTW, this topic tends to eventually produce a claim that the fact that the different versions share so much code justifies the versioning mechanism.

Except that code sharing happens in many circumstances that don't require conflating incompatible protocols and then using an internal demultiplexing switch.

The larger topic is the choice between high-level switching versus low-level, and the long-term costs of transition mechanisms.

Dave Crocker
Brandenburg InternetWorking
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