Messages in this thread | | | Subject | Re: [RFC PATCH 12/12] IMA: Use the the system trusted keyrings instead of .ima_mok [ver #2] | From | Mimi Zohar <> | Date | Tue, 08 Mar 2016 09:38:13 -0500 |
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On Tue, 2016-03-08 at 16:14 +0200, Petko Manolov wrote: > On 16-03-08 13:08:36, David Howells wrote: > > Mimi Zohar <zohar@linux.vnet.ibm.com> wrote: > > > > > Only certificates signed by a key on the system keyring were added to > > > the IMA keyring, unless IMA_MOK_KEYRING was configured. Then, the > > > certificate could be signed by a either a key on the system or ima_mok > > > keyrings. To replicate this behavior, the default behavior should be to > > > only permit certificates signed by a key on the builtin keyring, unless > > > this new Kconfig is enabled. Only then, permit certificates signed by a > > > key on either the builtin or secondary keyrings to be added to the IMA > > > keyring. > > > > How about I change it to a choice-type item, with the following options: > > > > (1) No addition. > > > > (2) Addition restricted by built-in keyring. > > > > (3) Addition restricted by secondary keyring + built-in keyring. > > > > where the second and third options then depend on the appropriate keyrings > > being enabled. > > I would suggest leaving (1) and (3). Since secondary keyring only accepts keys > signed by certificate in the system keyring I think (2) is redundant. It adds > extra complexity (Kconfig is vague enough already) while it doesn't increase the > overall security by much.
I think you mean option 2 or 3, as option 1 implies not allowing any keys to be added to the IMA keyring.
Mimi
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