mirror of
https://github.com/volatilityfoundation/volatility
synced 2026-06-08 18:04:46 +00:00
Andrew C
128 lines
4.2 KiB
Python
128 lines
4.2 KiB
Python
# Volatility
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# Copyright (C) 2007-2013 Volatility Foundation
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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 Version 2 as
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# published by the Free Software Foundation. You may not use, modify or
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# distribute this program under any other version of the GNU General
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# Public License.
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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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"""
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@author: Andrew Case
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@license: GNU General Public License 2.0
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@contact: atcuno@gmail.com
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@organization:
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"""
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import volatility.obj as obj
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import volatility.plugins.linux.common as linux_common
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import volatility.plugins.linux.pslist as linux_pslist
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class linux_kernel_opened_files(linux_common.AbstractLinuxCommand):
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"""Lists files that are opened from within the kernel"""
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def _walk_node_hash(self, node):
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last_node = None
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cnt = 0
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hash_offset = self.addr_space.profile.get_obj_offset("dentry", "d_hash")
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while node.is_valid() and node != last_node:
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if cnt > 0:
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yield node, cnt
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dentry = obj.Object("dentry", offset = node.v() - hash_offset, vm = self.addr_space)
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cnt = cnt + 1
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last_node = node
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node = dentry.d_hash.next
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def _walk_node_node(self, node):
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last_node = None
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cnt = 0
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while node.is_valid() and node != last_node:
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if cnt > 0:
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yield node, cnt
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cnt = cnt + 1
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last_node = node
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node = node.next
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def _walk_node(self, node):
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last_node = None
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yield node, 0
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for node, cnt in self._walk_node_node(node):
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yield node, cnt
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for node, cnt in self._walk_node_hash(node):
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yield node, cnt
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def _gather_dcache(self):
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d_hash_shift = obj.Object("unsigned int", offset =self.addr_space.profile.get_symbol("d_hash_shift"), vm = self.addr_space)
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loop_max = 1 << d_hash_shift
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d_htable_ptr = obj.Object("Pointer", offset = self.addr_space.profile.get_symbol("dentry_hashtable"), vm = self.addr_space)
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arr = obj.Object(theType = "Array", targetType = "hlist_bl_head", offset = d_htable_ptr, vm = self.addr_space, count = loop_max)
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hash_offset = self.addr_space.profile.get_obj_offset("dentry", "d_hash")
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dents = {}
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for list_head in arr:
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if not list_head.first.is_valid():
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continue
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node = obj.Object("hlist_bl_node", offset = list_head.first & ~1, vm = self.addr_space)
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for node, cnt in self._walk_node(node):
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dents[node.v() - hash_offset] = 0
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return dents
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def _compare_filps(self):
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dcache = self._gather_dcache()
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tasks = linux_pslist.linux_pslist(self._config).calculate()
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for task in tasks:
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for filp, i in task.lsof():
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val = filp.dentry.v()
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if not val in dcache:
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yield val
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procs = linux_pslist.linux_pslist(self._config).calculate()
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for proc in procs:
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for vma in proc.get_proc_maps():
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if vma.vm_file:
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val = vma.vm_file.dentry.v()
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if not val in dcache:
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yield val
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def calculate(self):
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linux_common.set_plugin_members(self)
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for dentry_offset in self._compare_filps():
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dentry = obj.Object("dentry", offset = dentry_offset, vm = self.addr_space)
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if dentry.d_count > 0 and dentry.d_inode.is_reg() and dentry.d_flags == 128:
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yield dentry
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def render_text(self, outfd, data):
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self.table_header(outfd, [("Offset (V)", "[addrpad]"),
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("Partial File Path", "")])
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for dentry in data:
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self.table_row(outfd, dentry.obj_offset, dentry.get_partial_path())
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