MIT krb5 release 1.18 will remove single-DES support

[Kenneth MacDonald]

On Fri, 2019-05-31 at 18:57 -0400, Greg Hudson wrote:
> On 5/31/19 8:59 AM, Kenneth MacDonald wrote:
> > On Tue, 2019-05-28 at 15:01 -0400, Greg Hudson wrote:
> > > This is advance notice that the MIT krb5 1.18 release, planned
> > > for
> > > near
> > > the end of this year, will remove support for the single-DES
> > > encryption
> > > types
> > Does this impact on the kadmin/history key as documented at
> > 
> > 
> > 
https://web.mit.edu/kerberos/krb5-latest/doc/admin/database.html#updating-the-history-key
> 
> Yes; if the kadmin/history key uses a single-DES enctype, it will
> need
> to be migrated, or change-password operations on principals with
> policies will experience failures with 1.18.

Thanks for clarifying that.  Can you further confirm or correct these
two assumptions I'm making following on from this ...

1/ Our kadmin/history key has a single-DES and and another enctype, so
we're safe for now.

2/ If we rekey the kadmin/hostory key then all previous password
history will be unavailable, so users will be able to reuse some
previously used passwords (those set when the old kadmin/history key
was in operation).

Cheers,

Kenny.



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