mirror of
https://github.com/volatilityfoundation/volatility
synced 2026-06-08 18:04:46 +00:00
gleeda
71 lines
2.6 KiB
Python
71 lines
2.6 KiB
Python
# Volatility
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#
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# Authors:
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# Adam Boileau <metlstorm@storm.net.nz>
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# Mike Auty <mike.auty@gmail.com>
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#
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# This file is part of Volatility.
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#
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# Volatility is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# Volatility is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with Volatility. If not, see <http://www.gnu.org/licenses/>.
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#
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# *Heavily* based upon http://www.storm.net.nz/static/files/bioskbsnarf
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import struct
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import volatility.plugins.common as common
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import volatility.utils as utils
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import volatility.debug as debug
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from volatility.renderers import TreeGrid
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from volatility.renderers.basic import Address
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class BiosKbd(common.AbstractWindowsCommand):
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"""Reads the keyboard buffer from Real Mode memory"""
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BASE = 0x400
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OFFSET = 0x17
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BUFOFFSET = 0x1e
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LEN = 39
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FORMAT = "<BBBHH32s"
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def unified_output(self, data):
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return TreeGrid([("AsciiChar", str),
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("AsciiCode", Address),
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("Scancode", Address)],
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self.generator(data))
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def generator(self, data):
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"""Displays the character codes"""
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for c, s in data:
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yield (0, [str(self.format_char(c)), Address(ord(c)), Address(s)])
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def format_char(self, c):
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"""Prints out an ascii printable character"""
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if c in '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ[]{};\'#:@~,./<>?!"$%^&*()_+-=`\\|':
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return c
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return "."
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def calculate(self):
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"""Calculate returns the results of the bios keyboard reading"""
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addr_space = utils.load_as(self._config, astype = 'physical')
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data = addr_space.read(self.BASE + self.OFFSET, self.LEN)
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if not data or len(data) != self.LEN:
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debug.error("Failed to read keyboard buffer, please check this is a physical memory image.")
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_shifta, _shiftb, _alt, readp, _writep, buf = struct.unpack(self.FORMAT, data)
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unringed = buf[readp - self.BUFOFFSET:]
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unringed += buf[:readp - self.BUFOFFSET]
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results = []
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for i in range(0, len(unringed) - 2, 2):
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if ord(unringed[i]) != 0:
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results.append((unringed[i], ord(unringed[i + 1])))
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return results
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