:py:mod:`dissect.util.compression.xz`
=====================================

.. py:module:: dissect.util.compression.xz


Module Contents
---------------


Functions
~~~~~~~~~

.. autoapisummary::
   :nosignatures:

   dissect.util.compression.xz.repair_checksum



Attributes
~~~~~~~~~~

.. autoapisummary::

   dissect.util.compression.xz.HEADER_FOOTER_SIZE
   dissect.util.compression.xz.CRC_SIZE


.. py:data:: HEADER_FOOTER_SIZE
   :value: 12

   

.. py:data:: CRC_SIZE
   :value: 4

   

.. py:function:: repair_checksum(fh: BinaryIO) -> BinaryIO

   Repair CRC32 checksums for all headers in an XZ stream.

   FortiOS XZ files have (on purpose) corrupt streams which they read using a modified ``xz`` binary.
   The only thing changed are the CRC32 checksums, so partially parse the XZ file and fix all of them.

   .. rubric:: References

   - https://tukaani.org/xz/xz-file-format-1.1.0.txt
   - https://github.com/Rogdham/python-xz

   :param fh: A file-like object of an LZMA stream to repair.