Re: [secdir] Secdir review of draft-ietf-ecrit-additional-data
Randall Gellens <randy@qti.qualcomm.com> Wed, 16 September 2015 18:25 UTC
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Date: Wed, 16 Sep 2015 11:25:37 -0700
To: Magnus Nyström <magnusn@gmail.com>
From: Randall Gellens <randy@qti.qualcomm.com>
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Cc: "secdir@ietf.org" <secdir@ietf.org>, draft-ietf-ecrit-additional-data@tools.ietf.org
Subject: Re: [secdir] Secdir review of draft-ietf-ecrit-additional-data
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How do we want to word this? The original wording based on your suggestions was: TLS MUST be version 1.2 or later. It is RECOMMENDED to use only cypher suites that offer Perfect Forward Secrecy (PFS) and avoid Cipher Block Chaining (CBC), for example, TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, TLS_DHE_RSA_WITH_AES_256_GCM_SHA384, TLS_DHE_RSA_WITH_AES_128_GCM_SHA256 [RFC5288] [RFC5289]. The next revision was: TLS MUST be version 1.2 or later. It is RECOMMENDED follow [BCP195]. So how to we want to work CBC in to this? And if we do, does that mean we need to also mention the specific cypher suites? At 11:19 AM -0700 9/16/15, Magnus Nyström wrote: > Sorry, yes, also mention no CBC > > On Wed, Sep 16, 2015 at 10:57 AM, Randall > Gellens > <<mailto:randy@qti.qualcomm.com>randy@qti.qualcomm.com> > wrote: > > At 10:31 AM -0700 9/16/15, Magnus Nyström wrote: > >> Just a personal remark: BCP 195 still allows >> earlier versions of TLS, even TLS 1.0. I felt >> that for a new application like this, one >> could go stronger. Maybe a combo - where you >> rely on BCP 195 but mandate TLS 1.2 (or later)? >> > > > And not mention CBC? > > >> > On Wed, Sep 16, 2015 at 9:14 AM, Randall > Gellens > <<mailto:randy@qti.qualcomm.com>randy@qti.qualcomm.com> > wrote: > > At 7:38 AM +0000 9/16/15, > <mailto:stephen.farrell@cs.tcd.ie>stephen.farrell@cs.tcd.ie > wrote: > > On Wed Sep 16 04:09:03 2015 GMT+0100, Magnus Nyström wrote: > > Yes, at least mandating TLS 1.2 or higher and recommending as per above > seems reasonable. > The references for the GCM suites would be RFC 5288 and RFC 5289. > > > BCP195 has recent recommendations for most TLS > options. I'd say it'd be best to use those or > if not figure out why they're not correct for > this context. > > > Just to be clear: are you suggesting that we > replace text suggested by Magnus: > > TLS MUST be version 1.2 or later. It is RECOMMENDED to use only > cypher suites that offer Perfect Forward Secrecy (PFS) and avoid > Cipher Block Chaining (CBC), for example, > TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, > TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, > TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, > TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, > TLS_DHE_RSA_WITH_AES_256_GCM_SHA384, > TLS_DHE_RSA_WITH_AES_128_GCM_SHA256 [RFC5288] [RFC5289]. > > With this: > > TLS MUST be version 1.2 or later. It is RECOMMENDED follow > [BCP195]. > > > Note that BCP 195 does not address CBC (but > does discuss PFS). I just want to be clear > before making the change, so please confirm > that this works. > > -- > Randall Gellens > Opinions are personal; facts are suspect; I speak for myself only > -------------- Randomly selected tag: --------------- > If the odds are a million to one against something occurring, chances > are 50-50 it will. > > > > > -- > > -- Magnus > > > > > -- > > Randall Gellens > Opinions are personal; facts are suspect; I speak for myself only > -------------- Randomly selected tag: --------------- > > Between two evils, I always pick the one I never tried before. > --Mae West. > > > > > -- > > -- Magnus -- Randall Gellens Opinions are personal; facts are suspect; I speak for myself only -------------- Randomly selected tag: --------------- Total deregulation would allow anybody to fly any route, a situation that is unlikely ever to occur. --New York Times Magazine, 9 May 1976.
- [secdir] Secdir review of draft-ietf-ecrit-additi… Magnus Nyström
- [secdir] Secdir review of draft-ietf-mpls-tp-oam-… Tina TSOU
- Re: [secdir] Secdir review of draft-ietf-mpls-tp-… Venkatesan Mahalingam
- Re: [secdir] Secdir review of draft-ietf-mpls-tp-… Venkatesan Mahalingam
- Re: [secdir] Secdir review of draft-ietf-mpls-tp-… Tina TSOU
- Re: [secdir] Secdir review of draft-ietf-ecrit-ad… Randall Gellens
- Re: [secdir] Secdir review of draft-ietf-ecrit-ad… Magnus Nyström
- Re: [secdir] Secdir review of draft-ietf-ecrit-ad… Randall Gellens
- Re: [secdir] Secdir review of draft-ietf-ecrit-ad… Magnus Nyström
- Re: [secdir] Secdir review of draft-ietf-ecrit-ad… Randall Gellens
- Re: [secdir] Secdir review of draft-ietf-ecrit-ad… stephen.farrell
- Re: [secdir] Secdir review of draft-ietf-ecrit-ad… Hannes Tschofenig
- Re: [secdir] Secdir review of draft-ietf-ecrit-ad… Randall Gellens
- Re: [secdir] Secdir review of draft-ietf-ecrit-ad… Magnus Nyström
- Re: [secdir] Secdir review of draft-ietf-ecrit-ad… Randall Gellens
- Re: [secdir] Secdir review of draft-ietf-ecrit-ad… Magnus Nyström
- Re: [secdir] Secdir review of draft-ietf-ecrit-ad… Randall Gellens
- Re: [secdir] Secdir review of draft-ietf-ecrit-ad… Magnus Nyström
- Re: [secdir] Secdir review of draft-ietf-ecrit-ad… Brian Rosen
- Re: [secdir] Secdir review of draft-ietf-ecrit-ad… Randall Gellens
- Re: [secdir] Secdir review of draft-ietf-ecrit-ad… Brian Rosen