Nicolas Williams dc74e9d00c kdc: Add Heimdal cert ext for ticket max_life
This adds support for using a Heimdal-specific PKIX extension to derive
a maximum Kerberos ticket lifetime from a client's PKINIT certificate.

KDC configuration parameters:

 - pkinit_max_life_from_cert_extension
 - pkinit_max_life_bound

If `pkinit_max_life_from_cert_extension` is set to true then the
certificate extension or EKU will be checked.

If `pkinit_max_life_bound` is set to a positive relative time, then that
will be the upper bound of maximum Kerberos ticket lifetime derived from
these extensions.

The KDC config `pkinit_ticket_max_life_from_cert` that was added earlier
has been renamed to `pkinit_max_life_from_cert`.

See lib/hx509 and lib/krb5/krb5.conf.5.
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Heimdal

Heimdal is an implementation of:

  • ASN.1/DER,
  • PKIX, and
  • Kerberos.

For information how to install see here.

There are man pages for most of the commands.

Bug reports and bugs are appreciated. Use GitHub issues.

For more information see the project homepage https://heimdal.software/heimdal/ or the mailing lists:

heimdal-announce@heimdal.software low-volume announcement heimdal-discuss@heimdal.software high-volume discussion

send mail to heimdal-announce-subscribe@heimdal.software and heimdal-discuss-subscribe@heimdal.software respectively to subscribe.

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