On Tue, Mar 20, 2012 at 8:44 PM, Mikulas Patocka <mpatocka@xxxxxxxxxx> wrote: > > > 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@xxxxxxxxxxxx> >> >> Regards, >> Mandeep >> >> > Mikulas > > I can introduce a switch to make it accept the old format. Do you want to? > We can carry that as an out-of-tree patch until we migrate. On the other hand, it might be nice to support prepend or append. I don't too strong feelings but it might be nice to have prepend/append flag. Would definitely make our life easier. > Mikulas -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
