On Thu, May 13, 2021 at 02:44:07PM +0000, herberthbli(李弘博) wrote: > 在 2021/5/13 3:12, Eric Biggers 写道: > > On Wed, May 12, 2021 at 10:04:07PM +0800, Hongbo Li wrote: > > > From: Hongbo Li <herberthbli@xxxxxxxxxxx><mailto:herberthbli@xxxxxxxxxxx> > > This series of patches add support for x509 cert signed by eddsa, > which is described in RFC8032 [1], currently ed25519 only. > > > > It would be helpful to explain how this is related to the kernel's existing > Curve25519 support. > > - Eric > > > Curve25519 is an elliptic curve used for key agreement(ECDH). It is a Montgomery curve. > > Edwards25519 is a twisted Edwards curve and birationally equivalent to Curve25519, the > birational maps are described in rfc7748 section 4.1. > https://datatracker.ietf.org/doc/html/rfc7748#section-4.1 > > > Ed25519 is a Digital Signature Algorithm over Edwards25519. > Sure, but what does that mean in terms of code. Can you reuse any of the code, and if not why not? I *think* the answer is no, but this is a common point of confusion, so it would be helpful to properly explain this... - Eric
