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Re: [ietf-dkim] Interesting Dupe Signatures

2009-11-02 14:03:54
Murray S. Kucherawy wrote:


   DKIM-Signature: .... c=relaxed/relaxed;   // dupe
   DKIM-Signature: .... c=relaxed/relaxed;   // dupe
   DKIM-Signature: .... c=relaxed/relaxed;   // dupe
   DKIM-Signature: .... c=simple/relaxed;    // other signer
   DKIM-Signature: .... c=relaxed/relaxed;   // other signer

You need two header and one body canonicalizations in that example.  And that 
presumes there's no "l=", which creates another dimension in the matrix of 
canonicalizations you need to run.


Right, c= c14n order post bug.  Flip it! :)

Off hand, the only reason I see to consider this is when the mail size 
is somewhat, frequently and/or commonly relatively huge.

Comparing public APIs, it appears DKIM-MFILTER is doing some reduction 
  logic, but hard to read spaghetti code. :)

ALT-N's C/C++ cleaner library does not appear optimize it.

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