Re: [TLS] TLS Proxy Server Extension
Yoav Nir <ynir@checkpoint.com> Mon, 01 August 2011 15:08 UTC
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From: Yoav Nir <ynir@checkpoint.com>
To: David McGrew <mcgrew@cisco.com>
Date: Mon, 01 Aug 2011 18:08:17 +0300
Thread-Topic: [TLS] TLS Proxy Server Extension
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Cc: Philip Gladstone <pgladstone@cisco.com>, "tls@ietf.org" <tls@ietf.org>
Subject: Re: [TLS] TLS Proxy Server Extension
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On 8/1/11 5:19 PM, "David McGrew" <mcgrew@cisco.com> wrote: > >On Aug 1, 2011, at 12:15 AM, Yoav Nir wrote: >> >> >> As for servers, it's possible to change the tls-proxy format in >> ClientHello to have a "role" field that could be either "client" or >> "proxy". > >a further thought in this direction. The server could sign the >extension that it gets from the proxy, and that signature could be >returned to the client, along with the data that was signed. This >would give the client a strong confirmation that the server was aware >of the proxy. From a security standpoint, this is good. From a >deployability standpoint, it would require that servers are modified >to understand the extension, which is not so good. That depends on what the clients do with this strong confirmation. For example, I can see them showing the regular padlock even without the signature, but displaying the EV indication only when they get it. I'm also thinking about whether we can get client certificates to work. The hard problem is that Certificate Verify signs the handshake messages, and those are not available to the client. I don't think we want to send all the previous handshake messages in the extension, so getting this to work would also require a server-side change. Yoav
- [TLS] TLS Proxy Server Extension David McGrew
- Re: [TLS] TLS Proxy Server Extension Yngve N. Pettersen
- Re: [TLS] TLS Proxy Server Extension David McGrew
- Re: [TLS] TLS Proxy Server Extension Yoav Nir
- Re: [TLS] TLS Proxy Server Extension Yoav Nir
- Re: [TLS] TLS Proxy Server Extension Adam Langley
- Re: [TLS] TLS Proxy Server Extension Yoav Nir
- Re: [TLS] TLS Proxy Server Extension Adam Langley
- Re: [TLS] TLS Proxy Server Extension David McGrew
- Re: [TLS] TLS Proxy Server Extension David McGrew
- Re: [TLS] TLS Proxy Server Extension David McGrew
- Re: [TLS] TLS Proxy Server Extension Matt McCutchen
- [TLS] Certificate pins vs. MITM proxies Matt McCutchen
- Re: [TLS] TLS Proxy Server Extension Martin Rex
- Re: [TLS] TLS Proxy Server Extension Matt McCutchen
- Re: [TLS] TLS Proxy Server Extension Matt McCutchen
- Re: [TLS] TLS Proxy Server Extension Martin Rex
- Re: [TLS] TLS Proxy Server Extension Marsh Ray
- Re: [TLS] TLS Proxy Server Extension Yoav Nir
- Re: [TLS] TLS Proxy Server Extension Marsh Ray
- Re: [TLS] TLS Proxy Server Extension David McGrew
- Re: [TLS] TLS Proxy Server Extension David McGrew
- Re: [TLS] TLS Proxy Server Extension David McGrew
- Re: [TLS] TLS Proxy Server Extension David McGrew
- Re: [TLS] TLS Proxy Server Extension Martin Rex
- Re: [TLS] TLS Proxy Server Extension David McGrew
- Re: [TLS] TLS Proxy Server Extension Martin Rex
- Re: [TLS] TLS Proxy Server Extension Martin Rex
- Re: [TLS] TLS Proxy Server Extension Marsh Ray
- Re: [TLS] TLS Proxy Server Extension David McGrew
- Re: [TLS] TLS Proxy Server Extension David McGrew
- Re: [TLS] TLS Proxy Server Extension Marsh Ray
- Re: [TLS] TLS Proxy Server Extension Yoav Nir
- Re: [TLS] TLS Proxy Server Extension David McGrew
- Re: [TLS] TLS Proxy Server Extension David McGrew
- Re: [TLS] TLS Proxy Server Extension David McGrew
- Re: [TLS] TLS Proxy Server Extension Yoav Nir
- Re: [TLS] TLS Proxy Server Extension Marsh Ray
- Re: [TLS] TLS Proxy Server Extension Martin Rex
- Re: [TLS] TLS Proxy Server Extension Martin Rex
- Re: [TLS] TLS Proxy Server Extension Martin Rex
- Re: [TLS] TLS Proxy Server Extension David McGrew
- Re: [TLS] TLS Proxy Server Extension David McGrew
- Re: [TLS] TLS Proxy Server Extension Martin Rex
- Re: [TLS] TLS Proxy Server Extension David McGrew
- Re: [TLS] TLS Proxy Server Extension Yoav Nir
- Re: [TLS] TLS Proxy Server Extension Anders Rundgren
- Re: [TLS] TLS Proxy Server Extension Yoav Nir
- Re: [TLS] TLS Proxy Server Extension Ken Peirce
- Re: [TLS] TLS Proxy Server Extension Peter Gutmann
- Re: [TLS] TLS Proxy Server Extension Matt McCutchen
- Re: [TLS] TLS Proxy Server Extension Martin Rex
- Re: [TLS] TLS Proxy Server Extension Joshua Davies
- Re: [TLS] TLS Proxy Server Extension Yoav Nir
- Re: [TLS] TLS Proxy Server Extension Ken Peirce
- Re: [TLS] TLS Proxy Server Extension Philip Gladstone
- Re: [TLS] TLS Proxy Server Extension Kemp, David P.
- Re: [TLS] TLS Proxy Server Extension David McGrew
- Re: [TLS] TLS Proxy Server Extension Ralph Holz