mirror of
https://github.com/volatilityfoundation/volatility
synced 2026-06-08 18:04:46 +00:00
mike.auty@gmail.com
63 lines
2.4 KiB
Python
63 lines
2.4 KiB
Python
# Volatility
|
|
#
|
|
# Authors:
|
|
# Adam Boileau <metlstorm@storm.net.nz>
|
|
# Mike Auty <mike.auty@gmail.com>
|
|
#
|
|
# This program is free software; you can redistribute it and/or modify
|
|
# it under the terms of the GNU General Public License as published by
|
|
# the Free Software Foundation; either version 2 of the License, or (at
|
|
# your option) any later version.
|
|
#
|
|
# This program is distributed in the hope that it will be useful, but
|
|
# WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
# General Public License for more details.
|
|
#
|
|
# You should have received a copy of the GNU General Public License
|
|
# along with this program; if not, write to the Free Software
|
|
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
#
|
|
# *Heavily* based upon http://www.storm.net.nz/static/files/bioskbsnarf
|
|
|
|
import struct
|
|
import volatility.commands as commands
|
|
import volatility.utils as utils
|
|
import volatility.debug as debug
|
|
|
|
class BiosKbd(commands.command):
|
|
"""Reads the keyboard buffer from Real Mode memory"""
|
|
BASE = 0x400
|
|
OFFSET = 0x17
|
|
BUFOFFSET = 0x1e
|
|
LEN = 39
|
|
FORMAT = "<BBBHH32s"
|
|
|
|
def render_text(self, outfd, data):
|
|
"""Displays the character codes"""
|
|
outfd.write("Ascii Scancode\n")
|
|
for c, s in data:
|
|
outfd.write("{0} (0x{1:02x}) 0x{2:02x}\n".format(self.format_char(c), ord(c), s))
|
|
|
|
def format_char(self, c):
|
|
"""Prints out an ascii printable character"""
|
|
if c in '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ[]{};\'#:@~,./<>?!"$%^&*()_+-=`\\|':
|
|
return c
|
|
return "."
|
|
|
|
def calculate(self):
|
|
"""Calculate returns the results of the bios keyboard reading"""
|
|
addr_space = utils.load_as(self._config, astype = 'physical')
|
|
data = addr_space.read(self.BASE + self.OFFSET, self.LEN)
|
|
if not data or len(data) != self.LEN:
|
|
debug.error("Failed to read keyboard buffer, please check this is a physical memory image.")
|
|
_shifta, _shiftb, _alt, readp, _writep, buf = struct.unpack(self.FORMAT, data)
|
|
unringed = buf[readp - self.BUFOFFSET:]
|
|
unringed += buf[:readp - self.BUFOFFSET]
|
|
results = []
|
|
for i in range(0, len(unringed) - 2, 2):
|
|
if ord(unringed[i]) != 0:
|
|
results.append((unringed[i], ord(unringed[i + 1])))
|
|
|
|
return results
|