Re: [TLS] draft-ietf-tls-tls13-26 is vulnerable to externally set PSK identity enumeration

2018-03-18 Thread Benjamin Kaduk
On Sun, Mar 18, 2018 at 03:24:02PM +, Lanlan Pan wrote: > Benjamin Kaduk 于2018年3月14日周三 上午10:02写道: > > > It seems like we get ourselves in trouble by allowing multiple > > external PSKs to be present. If we allowed at most one external > > PSK in a given ClientHello, then aborting the handshak

Re: [TLS] Breaking into TLS to protect customers

2018-03-18 Thread Eric Mill
On Sun, Mar 18, 2018 at 12:09 PM, Darin Pettis wrote: > Agreed. I know a lot of good work has gone into TLS 1.3 and having > visibility to the data once it hits the data center seems like a new > capability to the good folks working that have had TLS 1.3 in mind for the > last couple years. B

Re: [TLS] Breaking into TLS to protect customers

2018-03-18 Thread Darin Pettis
Agreed. I know a lot of good work has gone into TLS 1.3 and having visibility to the data once it hits the data center seems like a new capability to the good folks working that have had TLS 1.3 in mind for the last couple years. But to enterprises, they have visibility to their data today and

Re: [TLS] draft-ietf-tls-tls13-26 is vulnerable to externally set PSK identity enumeration

2018-03-18 Thread Viktor Dukhovni
> On Mar 18, 2018, at 11:27 AM, Eric Rescorla wrote: > > After discussion with the chairs and the AD, I have opted to just add a > section > that explains the attack. I just merged that (but managed not to get it into > -27 > due to fumble fingering). It seems to me that privacy consideratio

Re: [TLS] draft-ietf-tls-tls13-26 is vulnerable to externally set PSK identity enumeration

2018-03-18 Thread Eric Rescorla
After discussion with the chairs and the AD, I have opted to just add a section that explains the attack. I just merged that (but managed not to get it into -27 due to fumble fingering). -Ekr On Mon, Mar 12, 2018 at 8:27 AM, Hubert Kario wrote: > When the server supports externally set PSKs th

Re: [TLS] draft-ietf-tls-tls13-26 is vulnerable to externally set PSK identity enumeration

2018-03-18 Thread Lanlan Pan
Benjamin Kaduk 于2018年3月14日周三 上午10:02写道: > It seems like we get ourselves in trouble by allowing multiple > external PSKs to be present. If we allowed at most one external > PSK in a given ClientHello, then aborting the handshake on binder > failure would be the correct choice, as discovering a va

Re: [TLS] I-D Action: draft-ietf-tls-tls13-27.txt

2018-03-18 Thread Eric Rescorla
As you can see, -27 is out. Sorry that I forgot to add a ChangeLog to this document. There should be no technical changes, but a lot of editorial ones. There is, I believe, one normative change, which is given here: https://www.ietf.org/rfcdiff?url1=draft-ietf-tls-tls13-26&url2=draft-ietf-tls-tls

[TLS] I-D Action: draft-ietf-tls-tls13-27.txt

2018-03-18 Thread internet-drafts
A New Internet-Draft is available from the on-line Internet-Drafts directories. This draft is a work item of the Transport Layer Security WG of the IETF. Title : The Transport Layer Security (TLS) Protocol Version 1.3 Author : Eric Rescorla Filename

Re: [TLS] Eric Rescorla's Discuss on draft-ietf-tls-dnssec-chain-extension-06: (with DISCUSS and COMMENT)

2018-03-18 Thread Shumon Huque
Hi Kathleen, Sorry for the delay. We'll have an updated draft addressing the IESG discuss/comments shortly after the I-D submission window opens early this week. The one other sticking point is the issue that Viktor has raised about extending the protocol to provide pinning to prevent downgrade t