Re: RFC: 'ioctl' for keyrings

[David Howells]

David Howells <dhowells@xxxxxxxxxx> wrote:

> I can fix this in one of a number of ways:
> 
>  (1) Provide a generic control operation (analogous with ioctl()) that allows
>      the user to make some general operation on a key (querying it, altering
>      it, interacting with hardware).
> 
>  (2) Provide an alter operation that only allows the key to be altered.
>      Looking at trusted_update(), though, I have a suspicion that this may not
>      be sufficient as that also seems to invoke an interaction with the TPM.
> 
>  (3) Provide separate, specific keyctl functions for the special operations
>      required by encrypted and trusted keys (and other key types potentially)
>      that are then validated in the core and routed to the key type.

  (4) Simply make key_update() look for the encrypted and trusted key types
      and call a special key type op for those.  The main ->update op will be
      taking preparsed data and would no longer be callable in this situation.

David
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