Re: [TLS] Comments on draft-ietf-tls-external-psk-importer-04

2020-04-21 Thread Christopher Wood
Thanks for the feedback, Scott! Please see inline below. On Tue, Apr 21, 2020, at 6:57 AM, Hollenbeck, Scott wrote: > 2. Technical comments. > > a. Distinct identities? Sec. 3 states "Non-imported and imported PSKs > are distinct since their identities are different on the wire." We > have

Re: [TLS] DTLS 1.3 AEAD additional data

2020-04-21 Thread Eric Rescorla
I think there are two potential resolutions to your CID issue: 1. Cryptographically protect it as in https://github.com/tlswg/dtls13-spec/pull/143 2. Forbid implicit CIDs (my preference) see: https://github.com/tlswg/dtls13-spec/issues/144 Would like to hear what others in the WG think. -Ekr

Re: [TLS] WGLC for "A Flags Extension for TLS 1.3"

2020-04-21 Thread Yoav Nir
Inline... > On 7 Apr 2020, at 1:39, Martin Thomson wrote: > > I like this work, but I don't believe this to be ready yet. > > S1 > None of the current proposed extensions are such that the server > indicates support without the client first indicating support. So as > not to preclude

Re: [TLS] DTLS 1.3 AEAD additional data

2020-04-21 Thread Eric Rescorla
On Tue, Apr 21, 2020 at 8:39 AM Hanno Becker wrote: > Hi all, > > To my understanding, DTLS 1.3 defines AEAD additional data for record > protection > as the record header as seen on the wire. Quoting Draft 37, Section 4: > > ``` >The entire header value shown in Figure 4 (but prior to

[TLS] DTLS 1.3 AEAD additional data

2020-04-21 Thread Hanno Becker
Hi all, To my understanding, DTLS 1.3 defines AEAD additional data for record protection as the record header as seen on the wire. Quoting Draft 37, Section 4: ``` The entire header value shown in Figure 4 (but prior to record number encryption) is used as as the additional data value for

[TLS] Comments on draft-ietf-tls-external-psk-importer-04

2020-04-21 Thread Hollenbeck, Scott
Here are a few comments gathered from Verisign Labs on draft-ietf-tls-external-psk-importer-04. 1. Overview of draft goals and techniques. We've summarized our understanding of the draft here. Our subsequent comments are based on this understanding. a. Goal: The draft's goal is to define a