for (ImmutableList<Class<?>> sig : allSignatures(boolean.class)) {
      Method checkArgumentMethod =
          Preconditions.class.getMethod("checkArgument", sig.toArray(new Class<?>[] {}));
      checkArgumentMethod.invoke(null /* static method */, getParametersForSignature(true, sig));

      Object[] failingParams = getParametersForSignature(false, sig);
      InvocationTargetException ite =

                throw new CIFSException("Failed to encrypt MIC", e);
            }
        }

        byte[] sig = new byte[16];
        SMBUtil.writeInt4(1, sig, 0); // version
        System.arraycopy(trunc, 0, sig, 4, 8); // checksum
        SMBUtil.writeInt4(seqNum, sig, 12); // seqNum

        return sig;
    }


    @Override
    public void verifyMIC ( byte[] data, byte[] mic ) throws CIFSException {

    for (ImmutableList<Class<?>> sig : allSignatures(boolean.class)) {
      Method checkArgumentMethod =
          Preconditions.class.getMethod("checkArgument", sig.toArray(new Class<?>[] {}));
      checkArgumentMethod.invoke(null /* static method */, getParametersForSignature(true, sig));

      Object[] failingParams = getParametersForSignature(false, sig);
      InvocationTargetException ite =

        int flags = oldFlags | ServerMessageBlock2.SMB2_FLAGS_SIGNED;
        SMBUtil.writeInt4(flags, data, offset + 16);

        this.digest.update(data, offset, length);

        byte[] sig = this.digest.doFinal();
        System.arraycopy(sig, 0, data, offset + SIGNATURE_OFFSET, SIGNATURE_LENGTH);
    }


    /**
     * 
     * {@inheritDoc}
     *