[openssl-users] Naive: how to generate EC public key from EC private key?

Blumenthal, Uri - 0553 - MITLL uri at ll.mit.edu
Thu Mar 17 21:17:39 UTC 2016

I’ve an extremely naïve question. I am generating ephemeral EC keys for
ECDH, following the example in

But it looks like the example ends on generation of the private key:
/* Generate the key */
if (!EVP_PKEY_keygen(kctx, &key)) goto err;

The next step must be obvious, but somehow I can’t figure it out. So my
question is: from having EVP_PKEY *privateECKey how do I get EVP_PKEY


P.S. The same question applies to RSA as well.
Uri Blumenthal

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