From: "Carlo E. Prelz" <fluido@...>
Date: 2012-10-28T03:37:12+09:00
Subject: Re: OpenSSL ECDSA public key from private

	Subject: OpenSSL ECDSA public key from private
	Date: Sun 28 Oct 12 03:28:36AM +0900

Quoting Nokan Emiro (uzleepito@gmail.com):

> Setting the private_key works fine, but I need to calculate the public_key
> too.
> I'm sure there's a way to ask the key object to calculate the corresponding
> public key, I just don't know how.

I have never done this myself before , but I was curious, and gave it
a look. 

Your OpenSSL::PKey::EC instance has a method called
#generate_key. After I run 

key.generate_key

I find that key.private_key is populated with an instance of
OpenSSL::BN, and key.public_key is populated with an instance of
OpenSSL::PKey::EC::Point. 

I hope this is what you were looking for. 

Carlo

-- 
  *         Se la Strada e la sua Virtu' non fossero state messe da parte,
* K * Carlo E. Prelz - fluido@fluido.as             che bisogno ci sarebbe
  *               di parlare tanto di amore e di rettitudine? (Chuang-Tzu)