Re: how to revert signed db zone file to unsgined plain text (remove dnssec keys)

2020-08-09 Thread Jelle de Jong

On 2020-08-09 04:51, Evan Hunt wrote:

On Sat, Aug 08, 2020 at 09:17:09PM +0200, Jelle de Jong wrote:

This will sound counter intuitive but I want to convert a
db.powercraft.nl.signed file to db.powercraft.nl (unsigned without keys). I
do have the keys used, but not the original file that got singed.

I know I can convert the raw format to text but the zone file is rather big
and i want to get rid of all the sign keys.

named-compilezone -f raw -F text -o powercraft.nl.text powercraft.nl
/var/cache/bind/db.powercraft.nl.signed

named-checkzone -D -f raw powercraft.nl
/var/cache/bind/db.powercraft.nl.signed


You can just regex out all the DNSSEC-related types. Something like
this ought to work:

$ named-compilezone -f raw -F text -s full -o - powercraft.nl | \
   awk '$4 ~ /(DNSKEY|DS|RRSIG|NSEC|NSEC3|NSEC3PARAM)/ {next} {print}'


Thank you for your reply, there are still a lot of ; 
resign=20200802123322 lines, but it does clean up a lot better, sorted 
on record type it would become useful, ideas?


Is there no clean named command to do this output?

Kind regards,

Jelle de Jong
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Re: how to revert signed db zone file to unsgined plain text (remove dnssec keys)

2020-08-09 Thread Evan Hunt
On Sun, Aug 09, 2020 at 12:03:22PM +0200, Jelle de Jong wrote:
> Thank you for your reply, there are still a lot of ; resign=20200802123322
> lines, but it does clean up a lot better, sorted on record type it would
> become useful, ideas?
> 
> Is there no clean named command to do this output?

Everything starting with ";" is a comment. Run it through "named-compilezone"
again, perhaps with "-s relative" this time (I used "-s full" before
because it makes processing with awk easier). The result should be be free
of comments and canonically sorted.

"named" can do this automatically if you dynamically update a zone and
remove the DNSKEY rrset. I think "dnssec-signzone -SPRQ" would do it if you
marked the keys as deleted with "dnssec-settime" first; I haven't tested
this, but it should. But I think the awk trick is probably the most
straightforward way.

-- 
Evan Hunt -- e...@isc.org
Internet Systems Consortium, Inc.
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