> From: owner-openssl-us...@openssl.org On Behalf Of Li, David
> Sent: Monday, 25 June, 2012 00:03
> Sorry I forgot. I do also have the EC public key (the point
> Qx and Qy) in hex. I also know the curve P-384.
> So the only step I am not sure is how to convert the EC
> private and public keys into the DER format, i.e., step 2.
>
<snip>
It's probably still easier to write a small program,
but if you really want to do it yourself, you can see
the structure by asn1parse'ing an existing one, or
looking at the code starting with ec/ec_asn1.c . It is
SEQUENCE
version INTEGER = 1
privatekey OCTETSTRING -- really the integer
parameters CONTEXT[0] CHOICE
named_curve OID
-- other choices not applicable
publickey CONTEXT[1] BITSTRING
-- contains the encoding/representation of the point
-- there are several options for point "conversion"
-- or "compression" apparently defined by X9.62
-- which I don't have so you'll probably have to find a
-- (good) reference or go through this part of the code
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