Hi Herbert, On Sat, Dec 10, 2016 at 6:37 AM, Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx> wrote: > As for AEAD we never had a sync interface to begin with and I > don't think I'm going to add one. That's too bad to hear. I hope you'll reconsider. Modern cryptographic design is heading more and more in the direction of using AEADs for interesting things, and having a sync interface would be a lot easier for implementing these protocols. In the same way many protocols need a hash of some data, now protocols often want some particular data encrypted with an AEAD using a particular key and nonce and AD. One protocol that comes to mind is Noise [1]. I know that in my own [currently external to the tree] kernel code, I just forego the use of the crypto API all together, and one of the primary reasons for that is lack of a sync interface for AEADs. When I eventually send this upstream, presumably everyone will want me to use the crypto API, and having a sync AEAD interface would be personally helpful for that. I guess I could always write the sync interface myself, but I imagine you'd prefer having the design control etc. Jason [1] http://noiseprotocol.org/ -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>