byte[] data = new byte[100];

        digest.sign(data, 0, data.length, mockRequest, mockResponse);

        // Check if BSRSPYL signature is written
        byte[] expectedSignature = "BSRSPYL ".getBytes();
        byte[] actualSignature = new byte[8];
        System.arraycopy(data, SmbConstants.SIGNATURE_OFFSET, actualSignature, 0, 8);

            update(data, offset, length);
            System.arraycopy(digest(), 0, data, index, 8);
            if (bypass) {
                bypass = false;
                System.arraycopy("BSRSPYL ".getBytes(), 0, data, index, 8);
            }
        } catch (final Exception ex) {
            if (LogStream.level > 0) {
                ex.printStackTrace(log);
            }
        } finally {

            update(data, offset, length);
            System.arraycopy(digest(), 0, data, index, 8);
            if (this.bypass) {
                this.bypass = false;
                System.arraycopy("BSRSPYL ".getBytes(), 0, data, index, 8);
            }
        } catch (final Exception ex) {
            log.error("Signature failed", ex);
        } finally {
            if (request instanceof SmbComNtCancel) {