# This file is Copyright 2020 Volatility Foundation and licensed under the Volatility Software License 1.0
# which is available at https://www.volatilityfoundation.org/license/vsl-v1.0
#
import logging
import volatility3.framework.symbols.linux.utilities.modules as linux_utilities_modules
from volatility3.framework import interfaces, renderers, exceptions
from volatility3.framework.configuration import requirements
from volatility3.framework.renderers import format_hints
from volatility3.framework.symbols import linux
from volatility3.plugins.linux import lsmod
vollog = logging.getLogger(__name__)
[docs]
class Keyboard_notifiers(interfaces.plugins.PluginInterface):
"""Parses the keyboard notifier call chain"""
_required_framework_version = (2, 0, 0)
[docs]
@classmethod
def get_requirements(cls):
return [
requirements.ModuleRequirement(
name="kernel",
description="Linux kernel",
architectures=["Intel32", "Intel64"],
),
requirements.VersionRequirement(
name="linux_utilities_modules",
component=linux_utilities_modules.Modules,
version=(1, 0, 0),
),
requirements.PluginRequirement(
name="lsmod", plugin=lsmod.Lsmod, version=(2, 0, 0)
),
requirements.VersionRequirement(
name="linuxutils", component=linux.LinuxUtilities, version=(2, 0, 0)
),
]
def _generator(self):
vmlinux = self.context.modules[self.config["kernel"]]
modules = lsmod.Lsmod.list_modules(self.context, vmlinux.name)
handlers = linux.LinuxUtilities.generate_kernel_handler_info(
self.context, vmlinux.name, modules
)
try:
knl_addr = vmlinux.object_from_symbol("keyboard_notifier_list")
except exceptions.SymbolError:
knl_addr = None
if not knl_addr:
raise TypeError(
"This plugin requires the keyboard_notifier_list structure. "
"This structure is not present in the supplied symbol table. "
"This means you are either analyzing an unsupported kernel version or that your symbol table is corrupt."
)
knl = vmlinux.object(
object_type="atomic_notifier_head",
offset=knl_addr.vol.offset,
absolute=True,
)
for call_back in linux.LinuxUtilities.walk_internal_list(
vmlinux, "notifier_block", "next", knl.head
):
call_addr = call_back.notifier_call
module_name, symbol_name = (
linux_utilities_modules.Modules.lookup_module_address(
self.context, vmlinux.name, handlers, call_addr
)
)
yield (0, [format_hints.Hex(call_addr), module_name, symbol_name])
[docs]
def run(self):
return renderers.TreeGrid(
[("Address", format_hints.Hex), ("Module", str), ("Symbol", str)],
self._generator(),
)