Re: [TLS] extended headers for (D)TLS (and their use with connection-id)
"Fossati, Thomas (Nokia - GB/Cambridge, UK)" <thomas.fossati@nokia.com> Wed, 24 January 2018 16:26 UTC
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From: "Fossati, Thomas (Nokia - GB/Cambridge, UK)" <thomas.fossati@nokia.com>
To: Adam Langley <agl@imperialviolet.org>
CC: "tls@ietf.org" <tls@ietf.org>, "Fossati, Thomas (Nokia - GB/Cambridge, UK)" <thomas.fossati@nokia.com>
Thread-Topic: [TLS] extended headers for (D)TLS (and their use with connection-id)
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Date: Wed, 24 Jan 2018 16:25:56 +0000
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Subject: Re: [TLS] extended headers for (D)TLS (and their use with connection-id)
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On 24/01/2018, 15:53, "alangley@gmail.com on behalf of Adam Langley" <alangley@gmail.com on behalf of agl@imperialviolet.org> wrote: > On Wed, Jan 24, 2018 at 6:31 AM, Fossati, Thomas (Nokia - > GB/Cambridge, UK) <thomas.fossati@nokia.com> wrote: > > > > A few months ago, Nikos (can't remember if on this list or on a side > > conversation) came up with this thought of a generic way to extend > > the TLS/DTLS record header. So, I've stolen his idea and written it > > up in [1] with the intention of using it to make room for the > > connection-id. > > Our experience with middleboxes suggests that this is likely to fault > afoul of many flaws in these products if deployed with TLS on the > wider internet. Thanks for the insight. I have thought a bit about this possibility when doing the write-up and the "MUST NOT be used during handshake" was meant exactly to minimise the possible impact of middle-boxes during session establishment. So, the chances to survive handshake should be the same as usual. After session establishment, the only thing that might look suspicious to an on-path box is the invalid length. Do you think this is likely to cause havoc? Or, in your experience, middle-boxes tend to not interfere after the TLS channel is up? cheers
- [TLS] extended headers for (D)TLS (and their use … Fossati, Thomas (Nokia - GB/Cambridge, UK)
- Re: [TLS] extended headers for (D)TLS (and their … Adam Langley
- Re: [TLS] extended headers for (D)TLS (and their … Fossati, Thomas (Nokia - GB/Cambridge, UK)
- Re: [TLS] extended headers for (D)TLS (and their … Adam Langley