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Re: [Privacy-pass] RFC 4055 PSS encoding

Watson Ladd <watsonbladd@gmail.com> Thu, 27 April 2023 21:47 UTC

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From: Watson Ladd <watsonbladd@gmail.com>
Date: Thu, 27 Apr 2023 14:47:09 -0700
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To: Christopher Wood <caw@heapingbits.net>
Cc: privacy-pass@ietf.org
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Subject: Re: [Privacy-pass] RFC 4055 PSS encoding
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On Wed, Apr 26, 2023 at 6:13 PM Christopher Wood <caw@heapingbits.net> wrote:
>
> Hi Watson,
>
> There are some implementations that will not parse DER encoded blobs with the NULL fields explicitly included, which is why the spec is as it is. I think it’s reasonable to be rigid about key ID format, if for no other reason that avoiding the situation where different implementations of the protocol don’t agree on the key ID when computed directly from the public key (as opposed to being computed from the DER encoding).

There is that. However, baking it into the standard means we'll have
to deal with it for all time.

>
> Best,
> Chris

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