dissect.util.compression.xz#

Module Contents#

Functions#

repair_checksum

Repair CRC32 checksums for all headers in an XZ stream.

Attributes#

HEADER_FOOTER_SIZE

CRC_SIZE

dissect.util.compression.xz.CRC_SIZE = 4#
dissect.util.compression.xz.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.

References

Parameters:

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