Hashcat Restore file: Python parsing library

File extension

restore

KS implementation details

License: CC0-1.0

This page hosts a formal specification of Hashcat Restore file using Kaitai Struct. This specification can be automatically translated into a variety of programming languages to get a parsing library.

Usage

Runtime library

All parsing code for Python generated by Kaitai Struct depends on the Python runtime library. You have to install it before you can parse data.

The Python runtime library can be installed from PyPI:

python3 -m pip install kaitaistruct

Code

Parse a local file and get structure in memory:

data = HashcatRestore.from_file("path/to/local/file.restore")

Or parse structure from a bytes:

from kaitaistruct import KaitaiStream, BytesIO

raw = b"\x00\x01\x02..."
data = HashcatRestore(KaitaiStream(BytesIO(raw)))

After that, one can get various attributes from the structure by invoking getter methods like:

data.version # => get version

Python source code to parse Hashcat Restore file

hashcat_restore.py

# This is a generated file! Please edit source .ksy file and use kaitai-struct-compiler to rebuild

from pkg_resources import parse_version
import kaitaistruct
from kaitaistruct import KaitaiStruct, KaitaiStream, BytesIO


if parse_version(kaitaistruct.__version__) < parse_version('0.9'):
    raise Exception("Incompatible Kaitai Struct Python API: 0.9 or later is required, but you have %s" % (kaitaistruct.__version__))

class HashcatRestore(KaitaiStruct):
    """
    .. seealso::
       Source - https://hashcat.net/wiki/doku.php?id=restore
    """
    def __init__(self, _io, _parent=None, _root=None):
        self._io = _io
        self._parent = _parent
        self._root = _root if _root else self
        self._read()

    def _read(self):
        self.version = self._io.read_u4le()
        self.cwd = (KaitaiStream.bytes_terminate(self._io.read_bytes(256), 0, False)).decode(u"UTF-8")
        self.dicts_pos = self._io.read_u4le()
        self.masks_pos = self._io.read_u4le()
        self.padding = self._io.read_bytes(4)
        self.current_restore_point = self._io.read_u8le()
        self.argc = self._io.read_u4le()
        self.padding2 = self._io.read_bytes(12)
        self.argv = [None] * (self.argc)
        for i in range(self.argc):
            self.argv[i] = (self._io.read_bytes_term(10, False, True, True)).decode(u"UTF-8")