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Re: [Fwd: Re: [ietf-dkim] canonicalized null body and dkim]

2006-12-21 05:37:52
Yes, see my other note that crossed in the mail. I left off a sentence.
And "last line of the body" is definitely more correct.

        Tony

Charles Lindsey wrote:
On Thu, 21 Dec 2006 04:50:07 -0000, Tony Hansen <tony(_at_)att(_dot_)com> 
wrote:


Point 7:
    Another way of expressing this algorithm that people may find
    easier to understand is:

    "If the last line of the message does not end with CRLF, CRLF is
    added. Then, CRLF 0*CRLF is reduced to a single CRLF."

Well that would be better expressed as "1*CRLF is reduced to a single
CRLF",
but you should be saying "If the last line of the body" rather than "If
the last line of the message", because

------------------
Last-Header: foobarCRLF
CRLF
------------------

is a message with an empty body (read RFC 2822).

Or put it another way; the last line of what you hash MUST NEVER be
empty (i.e. must never consist of CRLF with no preceding real text).

That was why I included my INFORMATIVE NOTE, just to remove any possible
misinteroretations (and we have just seen how easily people misinterpret
things :-( ).

--Charles H. Lindsey ---------At Home, doing my own 
thing------------------------

Tel: +44 161 436 6131                     
   Web: http://www.cs.man.ac.uk/~chl
Email: chl(_at_)clerew(_dot_)man(_dot_)ac(_dot_)uk      Snail: 5 Clerewood 
Ave, CHEADLE, SK8 3JU, U.K.

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A5

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