Re: [Sks-devel] Re: Type 20 ElGamal Sign/Encrypt keys

[David Shaw]

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On Wed, Nov 26, 2003 at 08:16:22PM -0500, Yaron M. Minsky wrote:
> Hmm.  I'm a bit confused.  RFC2440bis-draft suggests that V3 keys must
> be RSA keys --- and the keyid calculation is done accordingly.  But your
> email suggests that this is an elgamal key.  It's certainly a V3 key, so
> is this a broken key?  Anyone know more about this?

It's a historical relic from the very early days of GnuPG.  Way back
then, GnuPG created V3 Elgamal keys.  Such keys are not OpenPGP
compliant, and GnuPG hasn't generated them in a very long time.

For what it's worth, the way to calculate the keyid is to hash it as
if it was a V4 key, but using RIPEMD160 instead of SHA1.  Frankly, I'd
say you were safe in not handling them at all.

David
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