From: "Henri S." <lists@...>
Date: 2012-04-01T19:02:36+09:00
Subject: Re: ECDSA encryption with OpenSSL

@Martin,
you are right. It now works just fine with the modification of the last 
line as you suggested. Thank you.

But this is only the first part of the problem.
A HSM (Harware Security Module) gives me a public key point (X,Y) for 
signed messages verification

The code would look like this:
=============
# data: being a known message
# sig: being the signature of the message
# ec_point: being the public_key
# curve: string name if the EC curve
#
key = OpenSSL::PKey::EC.new(curve)
#set the public key
key.public_key=ec_point
# then we verify message signature with
key.dsa_verify_asn1(data, sig)
==============

the problem is I can't figure out how to generate either a proper 
OpenSSL::PKey::EC::Point or a suitable OpenSSL::PKey::EC , using the 
public key point coordinates received by the HSM. since there is no ruby 
method equivalent for "EC_POINT_set_affine_coordinates_GFp(...) "
Could anyone help ?

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