/usr/lib/python2.7/dist-packages/rekall/plugins/darwin/zones.py is in python-rekall-core 1.6.0+dfsg-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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#
# Copyright 2013 Google Inc. All Rights Reserved.
#
# 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
"""
Collectors and plugins that deal with Darwin zone allocator.
"""
__author__ = "Adam Sindelar <adamsh@google.com>"
from rekall import plugin
from rekall import utils
from rekall.plugins.darwin import common
class DarwinZoneHook(common.AbstractDarwinParameterHook):
"""Lists all allocation zones."""
name = "zones"
def calculate(self):
first_zone = self.session.profile.get_constant_object(
"_first_zone",
target="Pointer",
target_args=dict(
target="zone"))
return [x.obj_offset for x in first_zone.walk_list("next_zone")]
class DarwinZoneCollector(common.AbstractDarwinCachedProducer):
name = "zones"
type_name = "zone"
class AbstractZoneElementFinder(common.AbstractDarwinParameterHook):
"""Finds all the valid structs in an allocation zone."""
__abstract = True
zone_name = None
type_name = None
def validate_element(self, element):
raise NotImplementedError("Subclasses must override.")
def calculate(self):
# Find the zone that contains our data.
zone = self.session.plugins.search(
"(select zone from zones() where zone.name == ?).zone",
query_parameters=[self.zone_name]).first_result
if zone is None:
raise ValueError("Zone %r doesn't exist." % self.zone_name)
results = set()
for offset in zone.known_offsets:
element = self.session.profile.Object(offset=offset,
type_name=self.type_name)
if self.validate_element(element):
results.add(element.obj_offset)
return results
class DarwinDumpZone(common.AbstractDarwinCommand):
"""Dumps an allocation zone's contents."""
name = "dump_zone"
table_header = [
dict(name="offset", style="address"),
dict(name="data", width=34)
]
@classmethod
def args(cls, parser):
super(DarwinDumpZone, cls).args(parser)
parser.add_argument("--zone", default="buf.512")
def __init__(self, zone="buf.512", **kwargs):
super(DarwinDumpZone, self).__init__(**kwargs)
self.zone_name = zone
def collect(self):
zone = self.session.plugins.search(
"(select zone from zones() where zone.name == {zone_name}).zone",
query_parameters=dict(zone_name=self.zone_name),
silent=True
).first_result
if not zone:
raise ValueError("No such zone %r." % self.zone_name)
for offset in zone.known_offsets:
yield dict(offset=offset,
data=utils.HexDumpedString(
zone.obj_vm.read(offset, zone.elem_size)))
# All plugins below dump and validate elements from specific zones.
class DarwinSocketZoneFinder(AbstractZoneElementFinder):
name = "dead_sockets"
zone_name = "socket"
type_name = "socket"
def validate_element(self, socket):
return socket == socket.so_rcv.sb_so
class DarwinSocketZoneCollector(common.AbstractDarwinCachedProducer):
name = "dead_sockets"
type_name = "socket"
class DarwinTTYZoneFinder(AbstractZoneElementFinder):
name = "dead_ttys"
zone_name = "ttys"
type_name = "tty"
def validate_element(self, tty):
return tty.t_lock == tty
class DarwinTTYZoneCollector(common.AbstractDarwinCachedProducer):
name = "dead_ttys"
type_name = "tty"
class DarwinSessionZoneFinder(AbstractZoneElementFinder):
name = "dead_sessions"
zone_name = "session"
type_name = "session"
def validate_element(self, session):
return session.s_count > 0 and session.s_leader.p_argc > 0
class DarwinSessionZoneCollector(common.AbstractDarwinCachedProducer):
name = "dead_sessions"
type_name = "session"
class DarwinZoneVnodeFinder(AbstractZoneElementFinder):
zone_name = "vnodes"
type_name = "vnode"
name = "dead_vnodes"
def validate_element(self, vnode):
# Note for later: HFS-related vnodes can be validated
# by the pointer they have back to the vnode from the cnode (v_data).
return vnode.v_owner == 0 and vnode.v_mount != 0
class DarwinZoneVnodeCollector(common.AbstractDarwinCachedProducer):
name = "dead_vnodes"
type_name = "vnode"
class PsListDeadProcFinder(AbstractZoneElementFinder):
name = "dead_procs"
zone_name = "proc"
type_name = "proc"
def validate_element(self, element):
return element.validate()
class DarwinDeadProcessCollector(common.AbstractDarwinCachedProducer):
"""Lists dead processes using the proc allocation zone."""
name = "dead_procs"
type_name = "proc"
class DarwinZoneFileprocFinder(AbstractZoneElementFinder):
name = "dead_fileprocs"
type_name = "fileproc"
zone_name = "fileproc"
def validate_element(self, element):
return True
class DarwinDeadFileprocCollector(common.AbstractDarwinCachedProducer):
name = "dead_fileprocs"
type_name = "fileproc"
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