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Re: [jose] Std Java key representation of OKP in draft-liusvaara-jose-cfrg-curves-00

Anders Rundgren <anders.rundgren.net@gmail.com> Thu, 24 December 2015 12:48 UTC

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To: Vladimir Dzhuvinov <vladimir@connect2id.com>, Ilari Liusvaara <ilariliusvaara@welho.com>
References: <00e001d13d1b$09519d50$1bf4d7f0$@augustcellars.com> <20151223064653.GA24022@LK-Perkele-V2.elisa-laajakaista.fi> <567A49F3.8050500@gmail.com> <20151224054643.GA25322@LK-Perkele-V2.elisa-laajakaista.fi> <567BCEB6.3040609@connect2id.com>
From: Anders Rundgren <anders.rundgren.net@gmail.com>
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Date: Thu, 24 Dec 2015 13:48:09 +0100
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Cc: jose@ietf.org
Subject: Re: [jose] Std Java key representation of OKP in draft-liusvaara-jose-cfrg-curves-00
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On 2015-12-24 11:53, Vladimir Dzhuvinov wrote:
> Hi Ilari,
>
> Thank you for making this new contribution to the JOSE suite.
>
> The Java library for JOSE that I maintain includes methods for converting
 > between JWK instances and the standard Java types for representing keys.
 > My reading of the spec is that the established Java DHPublicKey
 > <https://docs.oracle.com/javase/7/docs/api/javax/crypto/interfaces/DHPublicKey.html> /
 > DHPrivateKey <https://docs.oracle.com/javase/7/docs/api/javax/crypto/interfaces/DHPrivateKey.html>
 > interfaces would be the best match for the proposed "OKP" JWK. Does this make sense?

Hi Vladimir,

Is your goal to eventually make this a part of standard java?
I would be interested in cooperating on a OpenJDK contribution.

Regardless of that my experiences with named EC curves in Java
(without BouncyCastle installed) would speak against reusing DH*
since there is no place for "crv" (or whatever it will be called...)
and "x" is called Y.

https://docs.oracle.com/javase/7/docs/api/javax/crypto/spec/DHPublicKeySpec.html

I would therefore consider starting with a new key type (OKP*).

If something "standard-ish" is the target, I would try to get some
feedback on an early proposal.

Regards,
Anders

>
> The current JWK types map as follows:
>
>   * "OCT" JWKs map to / from javax.crypto.SecretKey
>
>   * "RSA" JWKs map to / from java.security.interfaces.RSA{Public|Private}Key
>
>   * "EC" JWKs map to / from java.security.interfaces.EC{Public|Private}Key
>
>
> Can you recommend Java implementations of the new algs? I'm looking for a good place to start in order to add support for them in JOSE.
>
> Thanks,
>
> Vladimir
>
> --
> Vladimir Dzhuvinov
>
>
>
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