Re: [TLS] Secdir last call review of draft-ietf-tls-certificate-compression-07

2019-12-05 Thread Alessandro Ghedini
On Thu, Nov 28, 2019 at 05:01:37PM -0800, Christian Huitema via Datatracker wrote: > Reviewer: Christian Huitema > Review result: Has Issues > > I have reviewed draft-ietf-tls-certificate-compression-07 as part of the > security directorate's ongoing effort to review all IETF documents being >

Re: [TLS] DH security issue in TLS

2019-12-05 Thread Pascal Urien
Hi All I found in NIST Special Publication 800-56A Revision 3 5.6.2.3.1 FFC Full Public-Key Validation Routine 2. Verify that 1 = y q mod p. This test is implemented in OPENSSL This test relies on the fact that q and p are prime Pascal Le mer. 4 déc. 2019 à 18:16, Antoine Delignat-Lavaud

[TLS] TLS 1.3 supported versions and downgrade protection

2019-12-05 Thread Daniel Van Geest
Hi all, I think there might be ambiguity or an interoperability issue with the TLS 1.3 ServerHello Random value downgrade protection and some (possibly?) legitimate negotiation of TLS 1.2 using the supported_versions extension. Looking through RFC 8446 and the mail archives I don’t see

Re: [TLS] TLS 1.3 supported versions and downgrade protection

2019-12-05 Thread Benjamin Kaduk
On Thu, Dec 05, 2019 at 05:30:10PM +, Daniel Van Geest wrote: > Hi all, > > I think there might be ambiguity or an interoperability issue with the TLS > 1.3 ServerHello Random value downgrade protection and some (possibly?) > legitimate negotiation of TLS 1.2 using the supported_versions

Re: [TLS] TLS 1.3 supported versions and downgrade protection

2019-12-05 Thread David Benjamin
On Thu, Dec 5, 2019 at 12:36 PM Benjamin Kaduk wrote: > On Thu, Dec 05, 2019 at 05:30:10PM +, Daniel Van Geest wrote: > > Hi all, > > > > I think there might be ambiguity or an interoperability issue with the > TLS 1.3 ServerHello Random value downgrade protection and some (possibly?) >

Re: [TLS] [Last-Call] Secdir last call review of draft-ietf-tls-certificate-compression-07

2019-12-05 Thread Christian Huitema
On 12/6/2019 12:42 AM, Alessandro Ghedini wrote: > On Thu, Nov 28, 2019 at 05:01:37PM -0800, Christian Huitema via Datatracker > wrote: >> Reviewer: Christian Huitema >> Review result: Has Issues >> >> I have reviewed draft-ietf-tls-certificate-compression-07 as part of the >> security

Re: [TLS] DH security issue in TLS

2019-12-05 Thread Nasrul Zikri
> Hi All > > I found in NIST Special Publication 800-56A Revision 3 > 5.6.2.3.1 FFC Full Public-Key Validation Routine > 2. Verify that 1 = y q mod p. That should be, 1 = y^q mod p. > > This test is implemented in OPENSSL > > This test relies on the fact that q and p are prime > > Pascal >

Re: [TLS] DH security issue in TLS

2019-12-05 Thread Viktor Dukhovni
> On Dec 5, 2019, at 8:37 PM, Nasrul Zikri wrote: > > What must the server do if the client is old and does not support the safe > groups in RFC 7919? Presumably the old client is doing TLS 1.2 (or 1.0), since with TLS 1.3, the client MUST specify which groups it supports, and no others can be

Re: [TLS] Adoption call for draft-davidben-tls-batch-signing

2019-12-05 Thread Kazuho Oku
+1 for adoption. 2019年11月21日(木) 18:49 Salz, Rich : > I am against the working group NOT adopting this. > > > ___ > TLS mailing list > TLS@ietf.org > https://www.ietf.org/mailman/listinfo/tls > -- Kazuho Oku