Re: [PATCH] fscrypt: Add support for AES-128-CBC

[Eric Biggers]

On Thu, Mar 30, 2017 at 11:21:49PM -0700, Eric Biggers wrote:
> 
> Something else to consider (probably for the future; this doesn't necessarily
> have to be done yet) is that you really only need one essiv_tfm per *key*, not
> one per inode.  To deduplicate them you'd need a hash table or LRU queue or
> something to keep track of the keys in use.
> 

Sorry, I screwed this up.  This wouldn't work because the ESSIV key is being
derived from the per-file key, not the master key.

- Eric