On Tue, Nov 30, 2021 at 06:36:15AM +0000, Bae, Chang Seok wrote: > On Nov 29, 2021, at 19:27, Eric Biggers <ebiggers@xxxxxxxxxx> wrote: > > On Wed, Nov 24, 2021 at 12:06:45PM -0800, Chang S. Bae wrote: > >> > >> == Non Use Cases == > >> > >> Bare metal disk encryption is the only use case intended by these patches. > > > > If that's the case, why are so many encryption modes being added (ECB, CTR, CBC, > > and XTS)? Wouldn't just XTS be sufficient? > > Right, it would reduce the crypt library changes significantly. But it is > clueless whether XTS is sufficient to support DM-crypt, because a user may > select the kernel’s crypto API via ‘capi:', [1]. > Just because dm-crypt allows you to create a ECB or CTR encrypted disk does not mean that it is a good idea. - Eric
