Messages in this thread |  | | Date | Sun, 20 Jan 2013 09:00:26 -0800 | From | "H. Peter Anvin" <> | Subject | Re: [PATCH 2/3] binfmt_elf: Verify signature of signed elf binary |
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On 01/20/2013 08:55 AM, Mimi Zohar wrote: > On Sun, 2013-01-20 at 08:17 -0800, H. Peter Anvin wrote: >> You then get into issues like: do we have to ban prelink as a result? > > Once you change a file, the original signature shouldn't match. If you > really trust prelink, then make prelink a trusted application that can > resign the modified file. How to create/store/use private keys on the > target system is a separate issue. >
That is true in a particularly brittle sense of the word, but it would also be possible for the signature system to explicitly recognize the transformation performed by prelink -- and no other -- before verification. That being said, that may be quite complex.
-hpa
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