Re: PHP hash

On Fri, Aug 03, 2007 at 12:10:11PM -0500, Kyle Wheeler wrote:
> If I understand ezmlm correctly, that thread ID is generated from some 
> details of the message that I handed it (just the Subject line, right?). 

Correct, assuming it's the first message and not a reply.  ezmlm-idx
tries to strip off reply prefixes like "re:" before calculating the
hash.

> So, I *think* I should be able to figure out what the thread ID will be at 
> the time I hand the message to ezmlm for delivery. However, I'm having 
> trouble replicating the hash based on my code-dives into ezmlm.
>
> Can any give me a hand? Is there a succinct description of this hash 
> function anywhere?

The hash function is called "surf", and is described in
http://cr.yp.to/papers/surf.pdf  It is applied in the makehash function.
There is no more succinct description than the code (though there are
parts of it that I don't entirely understand just from looking at it).
-- 
Bruce Guenter <[email protected]>                http://untroubled.org/

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