keytab to krb5_creds?

[Russ Allbery]

John Hascall <john at iastate.edu> writes:

> It seems to me that one ought to be able to construct a krb5_creds
> struct given a keytab (and the princ name you want from it)?  [probably
> re-inventing a number of wheels due to non-publically visible functions]

The kimpersonate tool that comes with Heimdal does essentially this.  Per
the man page:

     The kimpersonate program creates a "fake" ticket using the
     service-key of the service.  The service key can be read from a
     Kerberos 5 keytab, AFS KeyFile or (if compiled with support for
     Kerberos 4) a Kerberos 4 srvtab.

-- 
Russ Allbery (rra at stanford.edu)             <http://www.eyrie.org/~eagle/>