Re: [TLS] Signed messages should be prefixed with a NUL-terminated context string.
Eric Rescorla <ekr@rtfm.com> Wed, 26 November 2014 14:10 UTC
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From: Eric Rescorla <ekr@rtfm.com>
Date: Wed, 26 Nov 2014 06:09:38 -0800
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To: Nikos Mavrogiannopoulos <nmav@redhat.com>
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Subject: Re: [TLS] Signed messages should be prefixed with a NUL-terminated
context string.
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On Tue, Nov 25, 2014 at 11:40 PM, Nikos Mavrogiannopoulos <nmav@redhat.com> wrote: > ----- Original Message ----- > > This seems like a good idea. Thanks for raising it. > > An additional issue of switching to the new CertificateVerify > format for client and server, is that privilege separation for > authentication is not possible any more. > > On a previous mail I was asking for that feature to be extended for the > server as well: > http://www.ietf.org/mail-archive/web/tls/current/msg13398.html > > Was the removal of that protocol feature intentional? > Not really. I was aiming for unifying the structures. > If not I'd suggest the following format for the signatures: > struct { > digitally-signed struct { > opaque client_random[32]; > opaque server_random[32]; > opaque handshake_messages[handshake_messages_length]; > } > } CertificateVerify; > I've filed https://github.com/tlswg/tls13-spec/issues/97 so this doesn't get lost. If someone wants to contribute a PR so that we can have something concrete to look at that would be even better. Best -Ekr
- [TLS] Signed messages should be prefixed with a N… Adam Langley
- Re: [TLS] Signed messages should be prefixed with… Nikos Mavrogiannopoulos
- Re: [TLS] Signed messages should be prefixed with… Eric Rescorla
- Re: [TLS] Signed messages should be prefixed with… Nikos Mavrogiannopoulos
- Re: [TLS] Signed messages should be prefixed with… Eric Rescorla
- Re: [TLS] Signed messages should be prefixed with… Adam Langley
- Re: [TLS] Signed messages should be prefixed with… Nikos Mavrogiannopoulos
- Re: [TLS] Signed messages should be prefixed with… Eric Rescorla
- Re: [TLS] Signed messages should be prefixed with… Ilari Liusvaara
- Re: [TLS] Signed messages should be prefixed with… Eric Rescorla
- Re: [TLS] Signed messages should be prefixed with… Ilari Liusvaara
- Re: [TLS] Signed messages should be prefixed with… Eric Rescorla
- Re: [TLS] Signed messages should be prefixed with… Ilari Liusvaara
- Re: [TLS] Signed messages should be prefixed with… Eric Rescorla
- Re: [TLS] Signed messages should be prefixed with… Adam Langley
- Re: [TLS] Signed messages should be prefixed with… Michael StJohns
- Re: [TLS] Signed messages should be prefixed with… Watson Ladd
- Re: [TLS] Signed messages should be prefixed with… Adam Langley
- Re: [TLS] Signed messages should be prefixed with… Eric Rescorla
- Re: [TLS] Signed messages should be prefixed with… Michael StJohns
- Re: [TLS] Signed messages should be prefixed with… Eric Rescorla
- Re: [TLS] Signed messages should be prefixed with… Michael StJohns
- Re: [TLS] Signed messages should be prefixed with… Eric Rescorla
- Re: [TLS] Signed messages should be prefixed with… Eric Rescorla