Do you know if it is possible to determine where the files come from?
Well it's possible looking at filename and root drive but it's not
reliable (e.g. ata0 can be hd0 but also hd1, when we'll have network
support it will be even less obvious. Actually it's something grub2's
architecture is trying to hide) and in this context not relevant. If
signature is correct does it matter where the file comes from? At most
what is necessary for these functions is being able to read the files
like <original filename>.sig but it's trivial when filename is given
Hmm, to be precise we're interested in file reads. So if the loopback image is
implemented as disk driver, it should work.
AFAIR it's a disk driver which reads from file. IMO disk read hooks will
result in messy and bug-prone design which is incompatible with grub2's
versatility. And only the files that end up in memory or control grub
need to be checked.
Greets,
Jan
Regards
Vladimir 'phcoder' Serbinenko
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