Hello fellow developers,

summary: please review our NSEC3 code at 
https://github.com/habbie/powerdns/tree/fixnsec3 or 
https://github.com/Habbie/powerdns/compare/master…fixnsec3 !

Longer version:

prompted by recent big-scale DNSSEC rollouts (PowerDNS is responsible for a 
large part of the current level of http://xs.powerdns.com/dnssec-nl-graph/), a 
few bugs in PowerDNS' core DNS code and NSEC3 handling have popped up:
http://wiki.powerdns.com/trac/ticket/486
http://wiki.powerdns.com/trac/ticket/537
http://wiki.powerdns.com/trac/ticket/540

plus a non-ticket report that multi-label NXDOMAINs were failing (this is 
basically the same issue as in #486, as a wildcard response also involves a 
denial of the concrete name).

Kees Monshouwer has done a tremendous amount of work trying to fix these 
things, and I have collected his work plus some extra tests and a few nitpicks 
in a branch on GitHub, available at 
https://github.com/habbie/powerdns/tree/fixnsec3

You can view the diff to the pdns master tree at 
https://github.com/Habbie/powerdns/compare/master…fixnsec3

As part of this effort, nsec3dig was developed. It is in the pdns/ subdir of 
our source tree and can be built with 'make nsec3dig'. Note that it is very 
much a debugging tool. Some of the output it gives may be useless, and some 
things that might be useful (like telling you an RRSIG for a synthesized 
wildcard is correct) are missing. However, within the limitations of the tool, 
I have found it invaluable.

This branch (as does the master branch and our SVN) contains an extensive 
testing suite. Go into regression-tests/ and type './start-test-stop help' for 
more information. For the MySQL tests, you can override the connection 
information with some environment variables - see the source of start-test-stop 
for more information. Note that the database you point it at will be destroyed 
before testing.

We would like to ask anyone who is able and willing to do one or more of the 
following:
- read the diff or the full source of the updated implementation
- test the updated implementation in a lab (or in production, if you dare!)
- invent more tests

If you find anything, or if you find nothing, please let us know!

I intend/hope to put the updated code in SVN this week or next week. A 3.1.1 
release might just happen shortly after that.

Kind regards,
-- 
Peter van Dijk
Netherlabs Computer Consulting BV - http://www.netherlabs.nl/

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