[gnutls-help] ECDH internal functions and FIPS140-2 mode

Nicolas Mora nicolas at babelouest.org
Fri Jun 11 17:21:51 CEST 2021


Is it possible to continue with this patch?

Le 2021-03-20 à 20 h 23, Nicolas Mora a écrit :

> I'm having problems implementing ecdh-es with Curve25519/Curve448.
> - If I use an ed25519 key pair to compute, _gnutls_dh_compute_key 
> returns -55
> - If I use an x25519 key pair to compute, I can't import the key using 
> gnutls_pubkey_import/gnutls_privkey_import_x509
> Is it possible at this time to calculate a key agreement with these curves?
> I have a working prototype in rhonabwy [1] that uses Nettle's functions 
> curve25519_mul/curve448_mul. In this case I expect a X25519 or X448 key 
> pair.

I was stuck with the implementation of ecdh-es with Curve25519/Curve448, 
but ecdh-es with ecdsa works fine.

Thanks in advance


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