import org.bouncycastle.openpgp.PGPPublicKey;
import org.bouncycastle.openpgp.PGPPublicKeyRing;

public interface PublicKeyResultBuilder {
    void keyRing(PGPPublicKeyRing keyring);
    void publicKey(PGPPublicKey publicKey);

		x.SetBytes(xbuf)
		y.SetBytes(ybuf)

		return &ecdsa.PublicKey{
			Curve: curve,
			X:     &x,
			Y:     &y,
		}, nil
	default:
		if key.Alg == "EdDSA" && key.Crv == "Ed25519" && key.X != "" {
			pb, err := base64.RawURLEncoding.DecodeString(key.X)
			if err != nil {
				return nil, errMalformedJWKECKey
			}
			return ed25519.PublicKey(pb), nil
		}

	}
	curveID := CurveID(skx.key[1])<<8 | CurveID(skx.key[2])

	publicLen := int(skx.key[3])
	if publicLen+4 > len(skx.key) {
		return errServerKeyExchange
	}
	serverECDHEParams := skx.key[:4+publicLen]
	publicKey := serverECDHEParams[4:]

	sig := skx.key[4+publicLen:]
	if len(sig) < 2 {
		return errServerKeyExchange
	}

	if _, ok := curveForCurveID(curveID); !ok {

	}
	hashes[h] = f
}

// PublicKey represents a public key using an unspecified algorithm.
//
// Although this type is an empty interface for backwards compatibility reasons,
// all public key types in the standard library implement the following interface
//
//	interface{
//	    Equal(x crypto.PublicKey) bool
//	}
//

func generateLegacy(c elliptic.Curve, rand io.Reader) (*PrivateKey, error) {
	k, err := randFieldElement(c, rand)
	if err != nil {
		return nil, err
	}

	priv := new(PrivateKey)
	priv.PublicKey.Curve = c
	priv.D = k
	priv.PublicKey.X, priv.PublicKey.Y = c.ScalarBaseMult(k.Bytes())
	return priv, nil
}

// hashToInt converts a hash value to an integer. Per FIPS 186-4, Section 6.4,

		}
		if err := scanner.Err(); err != nil {
			panic(err)
		}
	}()

	var key *PublicKey
	var hashed []byte
	hash := crypto.SHA1
	h := hash.New()
	opts := &PSSOptions{
		SaltLength: PSSSaltLengthEqualsHash,
	}

	for marker := range values {
		switch marker {
		case newKeyMarker:
			key = new(PublicKey)
			nHex, ok := <-values
			if !ok {
				continue
			}
			key.N = bigFromHex(nHex)

		NamedCurveOID: oid,
		PublicKey:     asn1.BitString{Bytes: elliptic.Marshal(key.Curve, key.X, key.Y)},
	})
}

// marshalECDHPrivateKey marshals an EC private key into ASN.1, DER format
// suitable for NIST curves.
func marshalECDHPrivateKey(key *ecdh.PrivateKey) ([]byte, error) {
	return asn1.Marshal(ecPrivateKey{
		Version:    1,
		PrivateKey: key.Bytes(),
		PublicKey:  asn1.BitString{Bytes: key.PublicKey().Bytes()},

	var zero zeroReader
	public, private, _ := GenerateKey(zero)

	signer := crypto.Signer(private)

	publicInterface := signer.Public()
	public2, ok := publicInterface.(PublicKey)
	if !ok {
		t.Fatalf("expected PublicKey from Public() but got %T", publicInterface)
	}

	if !bytes.Equal(public, public2) {
		t.Errorf("public keys do not match: original:%x vs Public():%x", public, public2)
	}

}

func SetupSender(kemID, kdfID, aeadID uint16, pub crypto.PublicKey, info []byte) ([]byte, *Sender, error) {
	suiteID := SuiteID(kemID, kdfID, aeadID)

	kem, err := newDHKem(kemID)
	if err != nil {
		return nil, nil, err
	}
	pubRecipient, ok := pub.(*ecdh.PublicKey)
	if !ok {
		return nil, nil, errors.New("incorrect public key type")
	}

		sigAlgo   SignatureAlgorithm
	}{
		{"RSA/RSA", &testPrivateKey.PublicKey, testPrivateKey, true, SHA384WithRSA},
		{"RSA/ECDSA", &testPrivateKey.PublicKey, ecdsaPriv, false, ECDSAWithSHA384},
		{"ECDSA/RSA", &ecdsaPriv.PublicKey, testPrivateKey, false, SHA256WithRSA},
		{"ECDSA/ECDSA", &ecdsaPriv.PublicKey, ecdsaPriv, true, ECDSAWithSHA256},
		{"RSAPSS/RSAPSS", &testPrivateKey.PublicKey, testPrivateKey, true, SHA256WithRSAPSS},