[dm-devel] [PATCH] dm: remake of the verity target

Mikulas Patocka mpatocka at redhat.com
Wed Mar 21 03:44:47 UTC 2012

On Tue, 20 Mar 2012, Mandeep Singh Baines wrote:

> But we are hashing fixed-sized blocks so there is no possibility of extension.

If the first part of some block contains some security-sensitive data and 
the last part of the same block can be attacker-controlled, he can use the 
collision attack to change the security-sensitive data.

> However, better safe than sorry. I guess we'll just have to deal with
> backward incompatibility. So feel free to add my sign off to the new
> patch also.
> Signed-off-by: Mandeep Singh Baines <msb at chromium.org>
> Regards,
> Mandeep
> > Mikulas

I can introduce a switch to make it accept the old format. Do you want to?


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