2.3.2.1 - EC keys suppport?
Aki Tuomi
aki.tuomi at dovecot.fi
Mon Jul 30 19:39:29 EEST 2018
> On 29 July 2018 at 23:39 ѽ҉ᶬḳ℠ <vtol at gmx.net> wrote:
>
>
>
> >> facing [ no shared cipher ] error with EC private keys.
> > the client connecting to your instance has to support ecdsa
> >
> >
>
> It does - Thunderbird 60.0b10 (64-bit)
>
> [ security.ssl3.ecdhe_ecdsa_aes_256_gcm_sha384;true ]
>
> It seems there is a difference between the private key (rsa vs. ecc ->
> SSL_CTX?) used for the certificate signing request and the signed
> certificate.
>
> The csr created from a private key with [ openssl genpkey -algorithm RSA
> ] and signed by a CA with [ ecdhe_ecdsa ] works with no error.
>
> But as stated in the initial message it does not work if the private key
> for the csr is generated with [ openssl ecparam -name brainpoolP512t1
> -genkey ].
>
>
Can you try, with your ECC cert,
openssl s_client -connect server:143 -starttls imap
and paste result?
Aki
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