assertDoesNotThrow(() -> InputValidator.validateArrayLength(array, 16, "test"));

        assertThrows(IllegalArgumentException.class, () -> InputValidator.validateArrayLength(null, 16, "test"));
        assertThrows(IllegalArgumentException.class, () -> InputValidator.validateArrayLength(array, 15, "test"));
        assertThrows(IllegalArgumentException.class, () -> InputValidator.validateArrayLength(array, 17, "test"));
    }

     * @param expectedLength the expected length
     * @param fieldName the field name for error reporting
     * @throws IllegalArgumentException if array is invalid
     */
    public static void validateArrayLength(byte[] array, int expectedLength, String fieldName) {
        if (array == null) {
            throw new IllegalArgumentException(fieldName + " cannot be null");
        }
        if (array.length != expectedLength) {