Quoting Mimi Zohar (zohar@xxxxxxxxxxxxxxxxxx): > On Mon, 2017-11-20 at 10:40 +0100, Roberto Sassu wrote: > > On 11/19/2017 12:23 AM, Mimi Zohar wrote: > > > Hi Serge, > > > > > > On Fri, 2017-11-17 at 22:20 -0600, Serge E. Hallyn wrote: > > >> On Tue, Nov 07, 2017 at 11:37:01AM +0100, Roberto Sassu wrote: > > >>> from a predefined position (/etc/ima/digest_lists/metadata), when rootfs > > >>> becomes available. Digest lists must be loaded before IMA appraisal is in > > >>> enforcing mode. > > >> > > >> I'm sure there's a good reason for it, but this seems weird to me. > > >> Why read it from a file on disk instead of accepting it through say > > >> a securityfile write? > > > > There are two reasons. > > > > Digest lists must be loaded before any file is accessed, otherwise IMA > > will deny the operation if appraisal is in enforcing mode. With digest > > lists it is possible to appraise files in the initial ram disk without > > including extended attributes (the default policy excludes those files). > > There are a number of people interested in extending CPIO to support > extended attributes, not just for IMA-appraisal. (Years ago I started > but unfortunately haven't had time to finish it.) Isn't the right > solution to add extended attribute support to CPIO? (For the record) Yes, yes it is.
