| < wallet-summary | Russ Allbery > Software > wallet |
(Report host keytabs in wallet for unknown hosts)
wallet-unknown-hosts check
wallet-unknown-hosts report min date
env REMOTE_USER=principal wallet-unknown-hosts purge min date
wallet-unknown-hosts constructs a database recording host-based keytabs in wallet whose corresponding hosts are not found in DNS. It records in that database the number of times the host wasn't found and the timestamp of the first time it was not found. It can then generate a report of host-based keytab objects that have not been found for a minimum number of consecutive times and which were last found longer ago than a particular date. Finally, it can purge from wallet all objects that meet those requirements.
When run with the check argument, wallet-unknown-hosts traverses the
wallet database looking for host-based keytabs, which it recognizes by
looking for keytab objects for principals with at least one period (.)
after a slash (/). It then applies a local check followed by a DNS
check. The DNS check is only successful (only considers the host to be
found) if it resolves to an IP address (possibly through a CNAME).
For any host that's not found, it records that host in its associated database. If this is the first time it wasn't found, it records the first missing time as the current time and the missing count as 1. If it previously wasn't found, it just increments the missing count.
For any host that is found, it deletes any record for that keytab from the database.
When run with the report argument, wallet-unknown-hosts takes two
additional arguments: min and date. min is the minimum number of
times that a host must be found missing for the corresponding keytabs to
show up on the report. date is a cutoff date in seconds since epoch;
keytabs will not be included in the report unless their first missing date
is older than date. The output will be the name component of the
keytab objects in the wallet that correspond to unknown hosts and meet
those thresholds.
When run with the purge argument, wallet-unknown-hosts will build a
list of keytab objects the same as with the report argument, using the
same additional arguments, but rather than printing them out will instead
delete them from the wallet database. To run purge, the environment
variable REMOTE_USER must be set to a principal that's a member of the
ADMIN ACL.
wallet-unknown-hosts doesn't have any facility to purge from its database all objects that are no longer in the wallet.
Having to specify an identity for purge mode is an artifact of the Wallet::Server API and needs to be fixed by providing some way to perform actions as a local administrator.
Russ Allbery <eagle@eyrie.org>
Copyright 2010, 2013 The Board of Trustees of the Leland Stanford Junior University
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SPDX-License-Identifier: MIT
| < wallet-summary | Russ Allbery > Software > wallet |