Re: [POSH] [xmpp] Comments/questions on draft-miller-posh-00
Peter Saint-Andre <stpeter@stpeter.im> Wed, 31 July 2013 13:39 UTC
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Date: Wed, 31 Jul 2013 15:38:55 +0200
From: Peter Saint-Andre <stpeter@stpeter.im>
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To: Dave Cridland <dave@cridland.net>
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Cc: Philipp Hancke <fippo@goodadvice.pages.de>, "<posh@ietf.org>" <posh@ietf.org>, "Matt Miller (mamille2)" <mamille2@cisco.com>
Subject: Re: [POSH] [xmpp] Comments/questions on draft-miller-posh-00
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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 [ removing xmpp@ietf.org since this is a general issue ] On 7/31/13 11:01 AM, Dave Cridland wrote: > On Wed, Jul 31, 2013 at 9:18 AM, Matt Miller (mamille2) > <mamille2@cisco.com <mailto:mamille2@cisco.com>> wrote: > > I will note that there is general queasiness with suspending > disbelief on a connection, accepting the TLS handshake but then > actually verifying (and potentially failing) the connection > because of TLS failings; not the least of which is the potential > for abuse is very very great. This also means that any error > reporting that one might get from their TLS implementations for > better error reporting is lost. > > > If there is queasiness here it's misplaced. The case for abuse here > is predicated on the TLS handshake being the authorization, which > it is not in any SASL based protocol. > > So in XMPP, we must already perform auth during the SASL exchange, > and during the <db:result/>, too. > > If you have a protocol which conflates authentication and > authorization, of course, then the situation is different. I don't think we want POSH to be limited to SASL application protocols. Peter - -- Peter Saint-Andre https://stpeter.im/ -----BEGIN PGP SIGNATURE----- Version: GnuPG/MacGPG2 v2.0.19 (Darwin) Comment: GPGTools - http://gpgtools.org Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQIcBAEBAgAGBQJR+RNvAAoJEOoGpJErxa2p86cP/2EEGUrGmRUEyJpSefdN4/hx MwLJUrtiBvR7Cj0clHYPguJ4YVRFvFKLwDDJ4aXxup725PTSXx7bfj1KVRw4cYej 8EB9i8iiJXIEUnMYYAhMcNxIHCnUSIETl2xpBU/A346+KNNDud+pITWGDf7jzWtP bIDoN3tjqXna9u4wvrtmE3fLkNEPGvkO/2RkhdmTkcJYrCrf5Jj9CeJwGB9bXCsX Cp7f1npqYKqj9kDe2Gslszo0nz/2etmHXR4/8/PWiCGafN/IM+moDv19InKByX5B PkXiaV0YpWu/eEO6Ty43Af3dWxoat4xAMu854MDRqpTlyo4HgXZ0P4paUYV/czCA X6Mfg1pf/Cgw1QoqGfY5syaGmRjCB0UBoRrMsNyTExfUEzJPIjZMtoL9vE/Yxvvo OGQo/5sLvMOM+UboGR+iOg7rAESxVSkemiA8rD2YmKY5k2PCSDqPLNrloaG9js1n PtBwHxUxnsUZyTEw/UEW3EYVD4k5WAUcqfeCd+/HV7VekWgPn6EFzPVOI/2C7WQ8 rCwF+hXRIePCzR276lcu24ab9BA8zwigKoXcLCEgnLcQwc1MDTVfSInoCh5n2G9q W3GAOePyZkcSgZ5f8vovuyRz7eGYsHeSd4DKTK3fLLfCVoQzslOJoR1ihYmN3R1y e+YmIqBnKpCOJ9YzQYNq =Sjm8 -----END PGP SIGNATURE-----
- [POSH] Comments/questions on draft-miller-posh-00 Michael Procter
- Re: [POSH] Comments/questions on draft-miller-pos… Peter Saint-Andre
- Re: [POSH] Comments/questions on draft-miller-pos… Philipp Hancke
- Re: [POSH] Comments/questions on draft-miller-pos… Michael Procter
- Re: [POSH] Comments/questions on draft-miller-pos… Michael Procter
- Re: [POSH] Comments/questions on draft-miller-pos… Michael Procter
- Re: [POSH] Comments/questions on draft-miller-pos… Philipp Hancke
- Re: [POSH] Comments/questions on draft-miller-pos… Matt Miller (mamille2)
- Re: [POSH] [xmpp] Comments/questions on draft-mil… Dave Cridland
- Re: [POSH] [xmpp] Comments/questions on draft-mil… Peter Saint-Andre
- Re: [POSH] [xmpp] Comments/questions on draft-mil… Philipp Hancke