Re: [TLS] [Technical Errata Reported] RFC8446 (5483)

2019-08-05 Thread Patrick Kelsey
I brought this up to Ekr at IETF 105, and he said he hadn't seen this particular errata, so here's a bump to the top of the list. As it's now been about a year that this errata has remained in the initial state, I think it might be worth having a look at and advancing to the next state, if for no

Re: [TLS] [Technical Errata Reported] RFC8446 (5483)

2019-08-05 Thread David Benjamin
There are two scalar multiplications involved. The first, as part of key generation, indeed passes in a known constant to the u value and outputs the byte string that goes into the key share. The second, the ECDH operation itself, passes in the peer key share and results in the shared secret. In th

Re: [TLS] [Technical Errata Reported] RFC8446 (5483)

2019-08-05 Thread Patrick Kelsey
Fair point that there are two scalar multiplications involved on either endpoint in the course of the exchange, that what is being referred to in this section of RFC8446 is the first one, and that some readers might find ambiguity with respect to this that could be addressed with a different approa