def keyring = new File(keyringsDir, "pubring.gpg")
        PGPPublicKey publicKey = null
        keyring.withInputStream {
            new PGPPublicKeyRingCollection(it, new BcKeyFingerprintCalculator()).each {
                publicKey = it.publicKey
            }
        }
        return publicKey
    }

    static PGPSecretKey readAsciiArmoredSecretKey(String resource) {

                            }

                            @Override
                            public void publicKey(PGPPublicKey publicKey) {
                                missing.set(false);
                                if (publicKey.getKeyID() == keyId) {
                                    builder.publicKey(publicKey);
                                }
                            }
                        });

	SeedSize = 32
)

// PublicKey is the type of Ed25519 public keys.
type PublicKey []byte

// Any methods implemented on PublicKey might need to also be implemented on
// PrivateKey, as the latter embeds the former and will expose its methods.

// Equal reports whether pub and x have the same value.
func (pub PublicKey) Equal(x crypto.PublicKey) bool {
	xx, ok := x.(PublicKey)
	if !ok {
		return false
	}

        keyringsAscii.size() == 2
        keyringsAscii.forEach { keyRing ->
            keyRing.publicKeys.forEachRemaining { publicKey ->
                assert publicKey.getUserAttributes().size() == 0
                assert publicKey.signatures.size() == publicKey.keySignatures.size()
            }
            assert keyRing.publicKey.userIDs.size() == 1
        }
    }

// signature algorithm negotiation.
func legacyTypeAndHashFromPublicKey(pub crypto.PublicKey) (sigType uint8, hash crypto.Hash, err error) {
	switch pub.(type) {
	case *rsa.PublicKey:
		return signaturePKCS1v15, crypto.MD5SHA1, nil
	case *ecdsa.PublicKey:
		return signatureECDSA, crypto.SHA1, nil
	case ed25519.PublicKey:
		// RFC 8422 specifies support for Ed25519 in TLS 1.0 and 1.1,

	"regexp"
	"strings"
	"testing"

	"golang.org/x/crypto/chacha20"
)

// Check that PublicKey and PrivateKey implement the interfaces documented in
// crypto.PublicKey and crypto.PrivateKey.
var _ interface {
	Equal(x crypto.PublicKey) bool
} = &ecdh.PublicKey{}
var _ interface {
	Public() crypto.PublicKey
	Equal(x crypto.PrivateKey) bool
} = &ecdh.PrivateKey{}

func TestECDH(t *testing.T) {

	if err == nil {
		err = VerifyPKCS1v15(&priv.PublicKey, crypto.SHA256, hash[:], sig)
		if err != nil {
			t.Errorf("VerifyPKCS1v15: %v", err)
		}
		sig[1] ^= 0x80
		err = VerifyPKCS1v15(&priv.PublicKey, crypto.SHA256, hash[:], sig)
		if err == nil {
			t.Errorf("VerifyPKCS1v15 success for tampered signature")
		}
		sig[1] ^= 0x80
		hash[1] ^= 0x80
		err = VerifyPKCS1v15(&priv.PublicKey, crypto.SHA256, hash[:], sig)

func (priv *PrivateKey) Public() crypto.PublicKey {
	return &priv.PublicKey
}

// Equal reports whether priv and x have the same value.
//
// See [PublicKey.Equal] for details on how Curve is compared.
func (priv *PrivateKey) Equal(x crypto.PrivateKey) bool {
	xx, ok := x.(*PrivateKey)
	if !ok {
		return false
	}
	return priv.PublicKey.Equal(&xx.PublicKey) && bigIntEqual(priv.D, xx.D)
}

// PrivateKey, as the latter embeds the former and will expose its methods.

// Size returns the modulus size in bytes. Raw signatures and ciphertexts
// for or by this public key will have the same size.
func (pub *PublicKey) Size() int {
	return (pub.N.BitLen() + 7) / 8
}

// Equal reports whether pub and x have the same value.
func (pub *PublicKey) Equal(x crypto.PublicKey) bool {

	testAllCurves(t, testKeyGeneration)
}

func testKeyGeneration(t *testing.T, c elliptic.Curve) {
	priv, err := GenerateKey(c, rand.Reader)
	if err != nil {
		t.Fatal(err)
	}
	if !c.IsOnCurve(priv.PublicKey.X, priv.PublicKey.Y) {
		t.Errorf("public key invalid: %s", err)
	}
}

func TestSignAndVerify(t *testing.T) {
	testAllCurves(t, testSignAndVerify)
}

func testSignAndVerify(t *testing.T, c elliptic.Curve) {