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Re: [TLS] PR for PSS support

Joseph Salowey <joe@salowey.net> Tue, 15 September 2015 21:21 UTC

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Date: Tue, 15 Sep 2015 14:21:38 -0700
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From: Joseph Salowey <joe@salowey.net>
To: Eric Rescorla <ekr@rtfm.com>
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Subject: Re: [TLS] PR for PSS support
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I looks like we have consensus to move forward with this PR (PSS), please
apply the change.  I think Russ's suggestion improves the text.

Thanks,

Joe

On Thu, Sep 10, 2015 at 1:18 PM, Eric Rescorla <ekr@rtfm.com> wrote:

> https://github.com/tlswg/tls13-spec/pull/239
>
> Based on the WG discussion, I've created a PR for adding support for PSS.
> The basic tactic I took is:
>
> - All in-protocol RSA signatures (i.e., in CertificateVerify) are PSS
> - You must use MGF1 with  the same hash as you used for the content.
> - I added a rsa_pss SignatureAlgorithm field.
>
> The impact of this is that endpoints can sunset support for RSASSA-PKCS1
> by omitting it from SignatureAlgorithms.
>
> Note that I didn't deprecate SHA-1 (something Hanno suggested) but I expect
> to in another PR based on WG consensus.
>
> Please take a look.
>
> -Ekr
>
>
>
>
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