SMBUtil.writeInt4(ServerMessageBlock2.SMB2_FLAGS_SIGNED, data, 16);

            // Place invalid signature
            byte[] invalidSignature = new byte[SIGNATURE_LENGTH];
            Arrays.fill(invalidSignature, (byte) 0xFF);
            System.arraycopy(invalidSignature, 0, data, SIGNATURE_OFFSET, SIGNATURE_LENGTH);

            boolean result = digest.verify(data, 0, data.length, 0, msg);