[Cryptography-dev] accessing elliptic curve domain parameters (a/b/p/etc)

[Matt Bullock]

Nice, thanks, I'll take a look at that once GitHub is back up.

   --Matt

On Wed, Jan 27, 2016 at 8:39 PM Paul Kehrer <paul.l.kehrer at gmail.com> wrote:

> Hi Matt,
>
> There are multiple issue/pull requests for this but unfortunately GitHub
> is down at the moment so I can't look them up... Once GitHub is back up and
> running take a look at https://github.com/pyca/cryptography/pull/2476 (that
> PR might have been split into other PRs that we've been discussing, but
> hopefully we've cross linked them)
>
> Please weigh in on that as knowing all the potential consumers helps us
> decide whether the increase in API surface area is worthwhile.
>
> -Paul Kehrer (reaperhulk)
>
> On January 27, 2016 at 7:34:28 PM, Matt Bullock (matt.s.b.42 at gmail.com)
> wrote:
>
> For a project I am working on, I have a need to encode/decode elliptic
> curve points using point compression[1].  As this is not yet supported
> natively by the cryptography library, I have started implementing it myself
> but have hit a snag.  Unlike the uncompressed point encoding, in order to
> decode a compressed curve point I need to be able to reference the curve
> parameters.  I have been searching through the cryptography documentation
> and code but cannot find any way of retrieving these values from the
> backend.
>
> Is there a method for this that I am missing, or is this functionality not
> yet available?
>
> thanks
>    --Matt
>
> [1] 2.3.3/2.3.4 http://www.secg.org/sec1-v2.pdf
>
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