Hello!
Knot 3.2.0 with a Thales HSM configured this way: (btw, I am not obfuscating
addresses or zone names -- these are actual testing names :)
keystore:
- id: thales
backend: pkcs11
config: "pkcs11:token=XX;pin-value=XXX /opt/nfast/toolkits/pkcs11/libcknfast.so"
key-label: on
policy:
- id: manualHSM
keystore: thales
single-type-signing: off
manual: on
zone:
- domain: tt05
dnssec-signing: on
dnssec-policy: manualHSM
master: pdns
acl: [ xfr, notify_from_pdns ]
The zone `tt05' exists on the primary and can be transferred, as the following
logs will show.
I start off by generating a KSK and a ZSK, and verify that the keys are
actually on the HSM:
$ keymgr tt05 generate algorithm=8 size=2048 ksk=yes zsk=no
579f877d1739efb7bcf551e41c8777e965f8416f
$ keymgr tt05 generate algorithm=8 size=2048 ksk=no zsk=yes
eb8ef53ebffbd9950bfa914f7f2b0f1cd43bbe63
$ cklist -n | grep tt05
CKA_LABEL "tt05. KSK"
CKA_LABEL "tt05. ZSK"
I now reload Knot, and at this point I am actually expecting the server to
"see" the new zone, get the keys, perform the transfer (XFR) and sign the zone.
But all that doesn't happen:
$ knotc reload
Reloaded
2023-02-09T12:10:10+0100 info: [tt05.] AXFR, incoming, remote 192.168.33.31@53, started
2023-02-09T12:10:10+0100 info: [tt05.] AXFR, incoming, remote 192.168.33.31@53, finished, 0.00 seconds, 3 messages, 377 bytes
2023-02-09T12:10:10+0100 info: [tt05.] DNSSEC, key, tag 38930, algorithm RSASHA256, KSK, public, active
2023-02-09T12:10:10+0100 info: [tt05.] DNSSEC, key, tag 511, algorithm RSASHA256, public, active
2023-02-09T12:10:10+0100 error: [tt05.] DNSSEC, failed to load private keys (not exists)
2023-02-09T12:10:10+0100 error: [tt05.] DNSSEC, failed to load keys (not exists)
2023-02-09T12:10:10+0100 info: [tt05.] DNSSEC, next signing at 2023-02-09T13:10:10+0100
2023-02-09T12:10:10+0100 error: [tt05.] refresh, failed (not exists)
2023-02-09T12:10:10+0100 error: [tt05.] zone event 'refresh' failed (not exists)
In the above, I don't understand why it's failed to load the keys. My
_assumption_ is that the server has enumerated the keys from the HSM but did
that before the two keys for this zone were created. Invoking `knotc
zone-keys-load' doesn't alter the situation.
I do understand the 'refresh' failing, as the zone tt05 doesn't as yet exist on
this knot secondary.
So I initiate a zone transfer:
$ knotc zone-retransfer tt05
OK
2023-02-09T12:11:04+0100 info: [tt05.] control, received command 'zone-retransfer'
2023-02-09T12:11:04+0100 info: [tt05.] AXFR, incoming, remote 192.168.33.31@53, started
2023-02-09T12:11:04+0100 info: [tt05.] AXFR, incoming, remote 192.168.33.31@53, finished, 0.00 seconds, 3 messages, 377 bytes
2023-02-09T12:11:04+0100 info: [tt05.] DNSSEC, key, tag 38930, algorithm RSASHA256, KSK, public, active
2023-02-09T12:11:04+0100 info: [tt05.] DNSSEC, key, tag 511, algorithm RSASHA256, public, active
2023-02-09T12:11:04+0100 error: [tt05.] DNSSEC, failed to load private keys (not exists)
2023-02-09T12:11:04+0100 error: [tt05.] DNSSEC, failed to load keys (not exists)
2023-02-09T12:11:04+0100 info: [tt05.] DNSSEC, next signing at 2023-02-09T13:11:04+0100
2023-02-09T12:11:04+0100 error: [tt05.] refresh, failed (not exists)
2023-02-09T12:11:04+0100 error: [tt05.] zone event 'refresh' failed (not exists)
It is clear that the transfer succeeds (the logs on the primary corroborate
this), and knot apparently knows the correct keys to use for the zone.
Why is it not signing it?
$ knotc zone-sign tt05
OK
2023-02-09T12:11:38+0100 info: [tt05.] control, received command 'zone-sign'
2023-02-09T12:11:38+0100 info: [tt05.] DNSSEC, dropping previous signatures, re-signing zone
2023-02-09T12:11:38+0100 error: [tt05.] zone event 're-sign' failed (invalid parameter)
I now restart the server:
# <restart knotd>
2023-02-09T12:12:16+0100 info: Knot DNS 3.2.0 starting
2023-02-09T12:12:16+0100 info: loaded configuration file '/etc/knot.conf', mapsize 500 MiB
2023-02-09T12:12:16+0100 info: using UDP reuseport, incoming TCP Fast Open
2023-02-09T12:12:16+0100 info: binding to interface 10.24.34.16@5353
2023-02-09T12:12:16+0100 info: changed directory to /
2023-02-09T12:12:16+0100 info: loading 7 zones
2023-02-09T12:12:16+0100 info: [tt05.] zone will be loaded
2023-02-09T12:12:16+0100 info: starting server
2023-02-09T12:12:18+0100 info: [tt05.] failed to parse zone file '/var/zones/tt05' (not exists)
Here again, I understand it cannot parse the zone, because the transfer hasn't
actually been comitted to disk.
So I manually transfer:
$ knotc zone-retransfer tt05
OK
2023-02-09T12:13:23+0100 info: [tt05.] control, received command 'zone-retransfer'
2023-02-09T12:13:23+0100 info: [tt05.] AXFR, incoming, remote 192.168.33.31@53, started
2023-02-09T12:13:23+0100 info: [tt05.] AXFR, incoming, remote 192.168.33.31@53, finished, 0.00 seconds, 3 messages, 377 bytes
2023-02-09T12:13:23+0100 info: [tt05.] DNSSEC, key, tag 38930, algorithm RSASHA256, KSK, public, active
2023-02-09T12:13:23+0100 info: [tt05.] DNSSEC, key, tag 511, algorithm RSASHA256, public, active
2023-02-09T12:13:23+0100 info: [tt05.] DNSSEC, signing started
2023-02-09T12:13:23+0100 info: [tt05.] DNSSEC, successfully signed
2023-02-09T12:13:23+0100 info: [tt05.] DNSSEC, next signing at 2023-02-23T11:13:24+0100
2023-02-09T12:13:23+0100 info: [tt05.] refresh, remote 192.168.33.31@53, zone updated, 0.44 seconds, serial none -> 2023010100, remote serial 2023010100, expires in 604800 seconds
2023-02-09T12:13:23+0100 info: [tt05.] zone file updated, serial 2023010100
And now the zone is signed.
Is there some way to 'streamline' this? :-) Or am I just doing something wrong
or being too impatient?
Best regards,
-JP
I note that the key label is not set when Knot generates new keys via PKCS#11.
Invoking `p11tool --list-all' shows a key as
Object 449:
URL: pkcs11:model=;manufacturer=nCipher%20Corp.%20Ltd;serial=xxx;\
token=YYY;\
id=%04%66%D0%9C%0D%9E%24%D9%79%0A%17%D3%5D%A0%CC%5A%3F%E2%A3%26;\
type=public
Type: Public key (RSA-2048)
Label:
ID: 04:66:d0:9c:0d:9e:24:d9:79:0a:17:d3:5d:a0:cc:5a:3f:e2:a3:26
The ID is that which `keymgr list' displays (with colons in it), but the label
is empty.
Is this by design? Would it be possible for Knot to actually set the label
(e.g. zone name - key type: example.com-ksk)?
Best regards,
-JP
Hello,
Since I upgraded to 3.2.2-cznic.1~bullseye, my scripts using knsupdate
fails, on every machine they run on.
I can reproduce this with gdb, here is the trace I get in this case :
Starting program: /usr/bin/knsupdate -k
/etc/letsencrypt.sh/hooks/tsig.key /tmp/tmp.17EBRdeI8j
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
Program received signal SIGSEGV, Segmentation fault.
0x000055555556161c in net_send (net=net@entry=0x7ffffffcbb80,
buf=0x555555592a10 "\345\327(", buf_len=196)
at utils/common/netio.c:587
587 utils/common/netio.c: No such file or directory.
(gdb) where
#0 0x000055555556161c in net_send (net=net@entry=0x7ffffffcbb80,
buf=0x555555592a10 "\345\327(", buf_len=196)
at utils/common/netio.c:587
#1 0x000055555555adee in pkt_sendrecv
(params=params@entry=0x7ffffffcbdd0) at utils/knsupdate/knsupdate_exec.c:456
#2 0x000055555555ba01 in cmd_send (lp=<optimized out>,
params=0x7ffffffcbdd0)
at utils/knsupdate/knsupdate_exec.c:851
#3 0x000055555555b3e6 in knsupdate_process_line
(line=line@entry=0x5555555755e0 "send",
params=params@entry=0x7ffffffcbdd0) at
utils/knsupdate/knsupdate_exec.c:498
#4 0x000055555555b5ed in knsupdate_process_line (params=0x7ffffffcbdd0,
line=0x5555555755e0 "send")
at utils/knsupdate/knsupdate_exec.c:486
#5 process_lines (params=params@entry=0x7ffffffcbdd0,
input=input@entry=0x5555555910f0)
at utils/knsupdate/knsupdate_exec.c:527
#6 0x000055555555bd3e in knsupdate_exec
(params=params@entry=0x7ffffffcbdd0)
at utils/knsupdate/knsupdate_exec.c:575
#7 0x0000555555559dc9 in main (argc=<optimized out>,
argv=0x7fffffffe548) at utils/knsupdate/knsupdate_main.c:35
The nsupdate script (/tmp/tmp.17EBRdeI8j) is here (with truncated TXT) :
server 10.42.42.21
zone durel.eu.
origin durel.eu.
ttl 600
add _acme-challenge.ns.durel.eu. 600 in TXT "qLH_KkbQ_IUVr[...]7rs-iUE"
send
quit
As I can reproduce this with any tsig key, I can provide a core if you
need it.
--
Bastien Durel
Good morning,
In Knot 3.2.0 the rrsig-refresh default changed, excerpt changlog:
knotd: default value for 'policy.rrsig-refresh' is propagation delay +
zone maximum TTL
I'd like to understand the rationale behind this change and whether or
not we should tune this parameter in our deployment.
We currently have monitoring in place to ensure that we always serve
valid signatures. In my understanding with the old defaults < 3.2.0 of
rrsig-refresh of 7d and rrsig-lifetime of 14d, we always ended up with
signatures that were at least valid for 7 days. As I understand, with
the new defaults, signatures might be refreshed way closer to their
expiry date. This makes me a bit uneasy, as if there are issues with
signing this gives us hardly any time to react and fix potential issues
before the current signatures expire.
I assume setting rrsig-refresh explicitly to 7d would restore the old
behavior, but I'm wondering if this is somehow bad practice and if we
are overly paranoid with our monitoring.
How do other people handle this? Are there any downsides of setting a
higher value of rrsig-refresh that we are not aware of?
Regards
André
Hello,
I tried to upgrade to knot 3.2 using the debian packages
from https://deb.knot-dns.cz/knot-latest bullseye/main, but the server
does not use my HSM anymore. All zones fails with :
août 22 14:38:13 arrakeen knotd[1285865]: info: [durel.org.] zone file parsed, serial 2021120479
août 22 14:38:13 arrakeen knotd[1285865]: error: [durel.org.] DNSSEC, failed to initialize signing context (PKCS #11 token not available)
août 22 14:38:13 arrakeen knotd[1285865]: 2022-08-22T14:38:13+0200 error: [durel.org.] DNSSEC, failed to initialize signing context (PKCS #11 token not available)
août 22 14:38:13 arrakeen knotd[1285865]: 2022-08-22T14:38:13+0200 error: [durel.org.] zone event 'load' failed (PKCS #11 token not available)
août 22 14:38:13 arrakeen knotd[1285865]: error: [durel.org.] zone event 'load' failed (PKCS #11 token not available)
debug log does not seems to print more details about error
keystore is defined as :
keystore:
- id: hsmkey
backend: pkcs11
config: "pkcs11:pin-value=REDACTED /usr/lib/x86_64-linux-gnu/opensc-pkcs11.so"
The HSM itself is an USB key from CardContact.de
Downgrading to 3.1.9-cznic.1~bullseye re-enable signing
Is there anything I can do to debug/solves this problem ?
Regards,
--
Bastien
