Re: F30 Self-Contained Change proposal: krb5 crypto modernization

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Jason L Tibbitts III <tibbs@xxxxxxxxxxx> writes:

>>>>>> "RH" == Robbie Harwood <rharwood@xxxxxxxxxx> writes:
>
> RH> Ah, I see, you're talking about the case when the enctype is already
> RH> not permitted.  That all makes sense then.
>
> Right.  Basically, if any one of these:
>
> * Warnings in previous versions about principals without modern etypes
> * Logging in the new version to say why tickets wouldn't issue for
>   principals with old etypes
> * A checkup tool in either the old or current versions to tell me what's
>   gone wrong
>
> had existed then there would have been no confusion.  Certainly I was
> able to figure it out but... if someone had just done an OS update
> without proper testing then they could be in a pretty bad position.i
>
> So basically the big issue as I see it is that there's simply nothing
> to tell you that things are going to break, and after the update
> there's nothing that tells you why things are broken.  And I was
> concerned that if some encryption routines go away completely then it
> would be possible to be in a state where you can't even decrypt the
> database.

I have added warnings for:

- deprecated enctype issuance on KDC
- deprecated enctypes in klist output
- deprecated enctype in stash / K/M

to the latest rawhide builds (krb5-1.17-3.fc30).

If I backport this to fc29, will that assuage people's concerns?  Or do
I need to defer the change until fc31?

Thanks,
--Robbie

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