// When/Then
        assertThrows(IllegalArgumentException.class, () -> {
            transformHeader.setSignature(shortSignature);
        });

        assertThrows(IllegalArgumentException.class, () -> {
            transformHeader.setSignature(longSignature);
        });
    }

    @Test
    @DisplayName("Should handle buffer underflow during decode")

     *
     * @return the signature/authentication tag
     */
    public byte[] getSignature() {
        return this.signature;
    }

    /**
     * Sets the signature or authentication tag for the encrypted message
     *
     * @param signature
     *            the signature/authentication tag to set
     */
    public void setSignature(final byte[] signature) {
        if (signature.length != 16) {

                    isGCMCipher() ? encryptWithGCM(message, nonce, associatedData) : encryptWithCCM(message, nonce, associatedData);

            // Set authentication tag in transform header
            transformHeader.setSignature(encResult.authTag);

            // Build final encrypted message
            final byte[] result = new byte[Smb2TransformHeader.TRANSFORM_HEADER_SIZE + encResult.ciphertext.length];

     *            Array of arguments
     */
    public ConstructorNotFoundRuntimeException(final Class<?> targetClass, final Object[] methodArgs) {
        super("ECL0048", asArray(targetClass.getName(), getSignature(methodArgs)));
        this.targetClass = targetClass;
        this.methodArgs = methodArgs;
        paramTypes = null;
    }

    /**
     * Creates a {@link ConstructorNotFoundRuntimeException}.
     *

	regionBytes := sumHMAC(date, []byte(region))
	service := sumHMAC(regionBytes, []byte(stype))
	signingKey := sumHMAC(service, []byte("aws4_request"))
	return signingKey
}

// getSignature final signature in hexadecimal form.
func getSignature(signingKey []byte, stringToSign string) string {
	return hex.EncodeToString(sumHMAC(signingKey, []byte(stringToSign)))
}

// Check to see if Policy is signed correctly.

     */
    public NoSuchMethodRuntimeException(final Class<?> targetClass, final String methodName, final Class<?>[] argTypes,
            final Throwable cause) {
        super("ECL0057", asArray(targetClass.getName(), MethodUtil.getSignature(methodName, argTypes)), cause);
        this.targetClass = targetClass;
        this.methodName = methodName;
        this.argTypes = argTypes;
    }

    /**
     * Returns the target class.
     *

     */
    public MethodNotFoundRuntimeException(final Class<?> targetClass, final String methodName, final Class<?>[] methodArgClasses) {
        super("ECL0049", asArray(targetClass.getName(), MethodUtil.getSignature(methodName, methodArgClasses)));
        this.targetClass = targetClass;
        this.methodName = methodName;
        this.methodArgClasses = methodArgClasses;
    }

    /**

     * @param argTypes
     *            The argument types
     * @return The string representation of the method signature
     */
    public static String getSignature(final String methodName, final Class<?>... argTypes) {
        assertArgumentNotEmpty("methodName", methodName);

        final StringBuilder buf = new StringBuilder(100);
        buf.append(methodName).append("(");

		emptySHA256 + "\n" +
		hashedChunk

	// Get hmac signing key.
	signingKey := getSigningKey(cr.cred.SecretKey, cr.seedDate, cr.region, serviceS3)

	// Calculate signature.
	newSignature := getSignature(signingKey, stringToSign)

	return newSignature
}

// getTrailerChunkSignature - get trailer chunk signature.
func (cr *s3ChunkedReader) getTrailerChunkSignature() string {

					fmt.Sprintf(credentialTemplate, accessKey, now.Format(yyyymmdd), globalMinioDefaultRegion),
				},
				"X-Amz-Date": []string{now.Format(iso8601Format)},
				"X-Amz-Signature": []string{
					getSignature(getSigningKey(globalActiveCred.SecretKey, now,
						globalMinioDefaultRegion, serviceS3), "policy"),
				},
				"Policy": []string{"policy"},
			},
			expected: ErrNone,
		},
	}