// according to the AWS S3 signature V2 spec.
func compareSignatureV2(sig1, sig2 string) bool {
	// Decode signature string to binary byte-sequence representation is required
	// as Base64 encoding of a value is not unique:
	// For example "aGVsbG8=" and "aGVsbG8=\r" will result in the same byte slice.
	signature1, err := base64.StdEncoding.DecodeString(sig1)
	if err != nil {
		return false
	}

// according to the AWS S3 signature V4 spec.
func compareSignatureV4(sig1, sig2 string) bool {
	// The CTC using []byte(str) works because the hex encoding
	// is unique for a sequence of bytes. See also compareSignatureV2.
	return subtle.ConstantTimeCompare([]byte(sig1), []byte(sig2)) == 1
}

// doesPolicySignatureMatch - Verify query headers with post policy

		t.Errorf("error.Sys (%v) has type %T; expected syscall.WaitStatus", ee.Sys(), ee.Sys())
	} else if !ws.Signaled() || (ws.Signal() != sig1 && ws.Signal() != sig2) {
		if sig2 == 0 {
			t.Errorf("got %q; expected signal %q", ee, sig1)
		} else {
			t.Errorf("got %q; expected signal %q or %q", ee, sig1, sig2)
		}
	} else {
		return true
	}
	return false
}

func TestOsSignal(t *testing.T) {
	switch GOOS {

    }

    /**
     * Configures the task to sign each of the given files
     */
    public void sign(File... files) {
        addSignatures(null, files);
    }

    /**
     * Configures the task to sign each of the given artifacts, using the given classifier as the classifier for the resultant signature publish artifact.
     */
    public void sign(String classifier, File... files) {

			return nil, errInvalidSigner
		}

		sig, err := s.Sign(buf.Bytes()) // buf holds n.Text
		if err != nil {
			return nil, err
		}

		var hbuf [4]byte
		binary.BigEndian.PutUint32(hbuf[:], hash)
		b64 := base64.StdEncoding.EncodeToString(append(hbuf[:], sig...))
		sigs.WriteString("— ")
		sigs.WriteString(name)
		sigs.WriteString(" ")
		sigs.WriteString(b64)
		sigs.WriteString("\n")
	}

		var priv [PrivateKeySize]byte
		copy(priv[:], privBytes)
		copy(priv[32:], pubKey)

		sig2 := Sign(priv[:], msg)
		if !bytes.Equal(sig, sig2[:]) {
			t.Errorf("different signature result on line %d: %x vs %x", lineNo, sig, sig2)
		}

		if !Verify(pubKey, msg, sig2) {
			t.Errorf("signature failed to verify on line %d", lineNo)
		}

		priv2 := NewKeyFromSeed(priv[:32])
		if !bytes.Equal(priv[:], priv2) {

	copy(privateKey[32:], publicKey)
}

// Sign signs the message with privateKey and returns a signature. It will
// panic if len(privateKey) is not [PrivateKeySize].
func Sign(privateKey PrivateKey, message []byte) []byte {
	// Outline the function body so that the returned signature can be
	// stack-allocated.
	signature := make([]byte, SignatureSize)
	sign(signature, privateKey, message, domPrefixPure, "")
	return signature

        addSignaturesToConfiguration(signTask, getConfiguration());
        return signTask;
    }

    protected Object addSignaturesToConfiguration(Sign task, final Configuration configuration) {
        task.getSignatures().all(sig -> configuration.getArtifacts().add(sig));
        return task.getSignatures().whenObjectRemoved(sig -> configuration.getArtifacts().remove(sig));
    }

	priv, _ := GenerateKey(c, rand.Reader)

	hashed := []byte("testing")
	sig, err := SignASN1(rand.Reader, priv, hashed)
	if err != nil {
		t.Errorf("error signing: %s", err)
		return
	}

	if !VerifyASN1(&priv.PublicKey, hashed, sig) {
		t.Errorf("VerifyASN1 failed")
	}

	hashed[0] ^= 0xff
	if VerifyASN1(&priv.PublicKey, hashed, sig) {
		t.Errorf("VerifyASN1 always works!")
	}
}

		return errServerKeyExchange
	}

	sigLen := int(sig[0])<<8 | int(sig[1])
	if sigLen+2 != len(sig) {
		return errServerKeyExchange
	}
	sig = sig[2:]

	signed := hashForServerKeyExchange(sigType, sigHash, ka.version, clientHello.random, serverHello.random, serverECDHEParams)
	if err := verifyHandshakeSignature(sigType, cert.PublicKey, sigHash, signed, sig); err != nil {