I am trying to DER encode the public component according to the RFC 3279
spec, but got stuck midway trough.
My code so far is like this:
void EncodePublicKeyMinimized(const string& filename, const ECDSA<ECP,
SHA256>::PublicKey& key)
{
ByteQueue queue;
DERSequenceEncoder(DERSequenceEncoder(queue,
ASNTag::SEQUENCE|ASNIdFlag::CONSTRUCTED),
ASNTag::SEQUENCE|ASNIdFlag::CONSTRUCTED);
publicKey.GetAlgorithmID().DEREncode(queue);
(CryptoPP::ASN1::secp256r1()).DEREncode(queue);
publicKey.GetGroupParameters().GetCurve().EncodePoint(queue,
publicKey.GetPublicElement(), false);
EncodeMinimized(filename, queue);
}
I'm trying to get the two Object Identifiers nested in the second Sequence
and to nest the Public Element as the last thing in the outer Sequence. I
can get the first OID nested correctly but then it stops.
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