Simple Signature Question

[Beaini, Ramsey (RBEAINI)]

Hi,

I'm trying to do a simple ECDSA signature and verification. Now I know that
the
ECDSA<EC2N, SHA>::PrivateKey contains the private key and
ECDSA<EC2N, SHA>::Signer contains the method SignMessage
But I can't figure out how to connect the PrivateKey object to the Signer
object.

I need something like a MakeSignerObject() method like the MakePublicKey
method.

Thanks,
Ramsey Beaini


void testECDSA()
{
        ECDSA<EC2N, SHA>::PrivateKey privkey;
        ECDSA<EC2N, SHA>::PublicKey pubkey;

        AutoSeededRandomPool rng; 

        const int messageLen = 100 ; 
        byte message[messageLen];

        ECDSA<EC2N, SHA>::Signer S(rng,ASN1::sect193r1()) ; 
        ECDSA<EC2N, SHA>::Verifier V;
        
        try 
        {
                privkey.Initialize(rng, ASN1::sect233k1());
                privkey.MakePublicKey(pubkey);

                SecByteBlock sig(S.SignatureLength()); 

                try 
                {
                        S.SignMessage(rng, message, messageLen, sig); 
        
                        try 
                        {
                                bool result = V.VerifyMessage(message,
messageLen, sig, messageLen); 
                        }
                        catch ( Exception e ) 
                        {
                                cout << " VerifyMessage failed "  <<
e.what() << endl ; 
                        }
                }
                catch ( Exception e ) 
                {
                        cout <<" SignMessage failed " << e.what() << endl ; 
                }
        }
        catch ( Exception e ) 
        {
                cout << e.what() << endl ; 
        }
}