How I can safe public and private of ES_KEY and create new ES_KEY for sign and verify

by Mark Shnaider :: Rate this Message:

Hello ,

I have problem in understanding and could you clarify for me what is the best way to extract and safe public and private keys

from generated ES_KEY and then create new key for signature or verify .

Example esdatest.c:

if (!EC_KEY_generate_key(key))

goto x962_int_err;

BIO_printf(out, ".");

If I would like to create new ES_KEY for verify to my opinion I need to perform following actions:

- Extract and safe key->pub_key->X, key->pub_key->Y, key->pub_key->Y to safeX,safeY,safeY

And then in the other application perform:

if ((new_key = EC_KEY_new_by_curve_name(nid)) == NULL) //create new key for verify

goto x962_int_err;

pub_key = EC_POINT_new(new_key->group);

-- copy big numbers safeX,safeY,safeY to pub_key->X, pub_key->Y, pub_key->Y

EC_KEY_set_public_key(new_key, pub_key);

Can I use now new_key for verify?

Thanks in advance

Best regards

Mark

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