Re: SHA-1 MBR

[Jan Alsenz]

Hi!

Wow, cool work!
It's not complete SHA-1, but the rest should be just a constant offset.

But I'm still not sure, what you are trying to do here, is the MBR your root of
trust?
If not, who checks the MBR?

Greets,

Jan


phcoder wrote:
> Hello, as promised I wrote an mbr which performs SHA-1. To squeeze the
> code I had to remove chs and to change the bootdrive installer will have
> to overwrite corresponding instruction. SHA-1 implemented in it is
> little-endian and without padding. Standard version is big-endian and
> with padding. In this case padding is unnecessary since a sector is
> always 512 bytes. Litt-le endian means just that data isn't byte-swapped
> before hashing. And the hash in sector has to be written in little
> endian and the double should be in order
> h1,h2,h3,h4,h0
> I also implemented the same thing as standalone program
> Regards
> Vladimir 'phcoder' Serbinenko

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