krb5_pac_verify and server key enctype extraction

Luke Howard lukeh at
Mon Jul 20 12:03:19 EDT 2009

On 20/07/2009, at 5:41 PM, Natalie Li wrote:

> Luke Howard wrote:
>>> Just to clarify, we're interested in the enctype associated with  
>>> the server's long-term key that was used to decrypt the krb ticket  
>>> carried in the KRB_AP_REQ, not the session key. Do we have an API  
>>> to extract that information from GSS context?
>> Not that I'm aware of. You can enumerate the keytab, looking for a  
>> key with a mandatory checksum type that matches that in the PAC.
>> -- Luke
> Yes, we do something similar to your above suggestion for now.  
> Thanks for confirming that there isn't any API for extracting tik  
> enctype.

Yeah, it took me a while to realise that that was I had always done.  
But yes, we should do what Sam suggests for 1.8.

-- Luke

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