[OpenAFS] Kerberos 5 encryption types and AFS

[Jeffrey Altman]

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Jason Edgecombe wrote:
> Hi,
> 
> We run an AFS cell with a kerberos 5 kdc and still have krb5/kas
> authentication in parallel. I'm looking to upgrade the kerberos server
> to version 1.6. This works well in my test setup. My question is "how
> does adding supporting encryption types interact with AFS and windows?"
> 
> Here is part of the kdc.conf
>   supported_enctypes = des-cbc-crc:normal des-cbc-crc:v4 des-cbc-crc:afs3
> 
> Does adding more encryption types hose AFS or windows? I'd like to start
> enabling stronger crypto types so that we have the  option of using them
> in the future.

For AFS the enctype of the afs service principal must be single DES
based.  For everything else AFS doesn't care.

Microsoft Windows only supports single DES and RC4-HMAC based enctypes
prior to Vista.  Vista also supports AES based enctypes.

> What do I need to lookout for with this?
> 
> BTW, we're still running krb524d because our aklog still needs it.

Get a new aklog?

> What do I need to do on the clients to enable use of the stronger crypto
> types?

Just make sure that you don't have enctype restrictions in the client's
krb5.conf.

Jeffrey Altman



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