Require MIT 1.10? (Re: credentials_krb5: use gss_acquire_cred for client-side GSSAPI use case)

[Stefan Metzmacher]

Am 06.03.2017 um 12:16 schrieb Alexander Bokovoy:
> On ma, 06 maalis 2017, Stefan Metzmacher wrote:
>> Hi Alexander,
>>
>>>>> ACK. Will do that.
>>>> I pushed current patchset to
>>>> https://git.samba.org/?p=ab/samba.git/.git;a=shortlog;h=refs/heads/master-gss_acquire_cred_from
>>>>
>>>> I'm running tests right now. Will submit final patch once they pass.
>>> Final patch is attached.
>>
>> I think we should also handle the keytab_principal argument
>> (or drop it from the argument list of the wrapper).
> This is done (attached). There is a need to use keytab_principal as it
> is passed by the credentials code.
>  
>> And please also add the fallback logic for broken
>> of gse_init_server() to handle the broken gss_krb5_import_cred()
>> for the acceptor into the wrapper. And/or reseach if the fallback
>> logic is still needed with our requirement for MIT 1.9.
> For the latter, the code that broke gss_krb5_import_cred() in MIT 1.9
> was later fixed[1] with bd18687a705a8a6cdcb7c140764d1a7c6a3381b5
> and finally the whole code path was removed with
> 889d3ca4c482f730cd194f2d83c41d70bc615a67
> 
> Both changes were released in MIT 1.10.
> 
> RHEL 6 has MIT krb5 1.10.3. Ubuntu and Debian have 1.10 too, starting
> with Precise, that's 5 stable releases ago for Ubuntu, and Wheezy for
> Debian.
> https://packages.debian.org/search?keywords=krb5&searchon=sourcenames&suite=all&section=all
> 
> On FreeBSD we have at least MIT 1.13 since FreeBSD 8.4:
> http://portsmon.freebsd.org/portoverview.py?category=security&portname=krb5&wildcard=
> 
> I think we can relatively safely drop MIT 1.9 and move to MIT 1.10 as a
> requirement. RHEL 5 stuck with 1.6 anyway.

I'm fine to move to MIT 1.10, but I guess better only for master/4.7.

If you want this backported to 4.6:
- please at the fallback to the wrapper first
- then change the configure check to require 1.10
- remove the fallback

If you don't need a backport:
- change the configure check to require 1.10
- remove the fallback
- apply your current patches

We may want to wait a few days to let people to comment
on the requirement.

Thanks!
metze

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