mirror of
https://github.com/chipsec/chipsec
synced 2026-06-08 13:31:00 +00:00
Aaron Frinzell
157 lines
6.5 KiB
Python
157 lines
6.5 KiB
Python
#!/usr/bin/python
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#CHIPSEC: Platform Security Assessment Framework
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#Copyright (c) 2010-2021, Intel Corporation
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#
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#This program is free software; you can redistribute it and/or
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#modify it under the terms of the GNU General Public License
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#as published by the Free Software Foundation; Version 2.
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#
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#This program 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 this program; if not, write to the Free Software
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#Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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#
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#Contact information:
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#chipsec@intel.com
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#
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import time
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import re
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from chipsec.command import BaseCommand
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from chipsec.hal.vmm import VMM, VMMRuntimeError, get_virtio_devices, VirtIO_Device
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from chipsec.hal.pci import print_pci_devices
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from argparse import ArgumentParser
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class VMMCommand(BaseCommand):
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"""
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>>> chipsec_util vmm hypercall <rax> <rbx> <rcx> <rdx> <rdi> <rsi> [r8] [r9] [r10] [r11]
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>>> chipsec_util vmm hypercall <eax> <ebx> <ecx> <edx> <edi> <esi>
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>>> chipsec_util vmm pt|ept <ept_pointer>
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>>> chipsec_util vmm virtio [<bus>:<device>.<function>]
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Examples:
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>>> chipsec_util vmm hypercall 32 0 0 0 0 0
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>>> chipsec_util vmm pt 0x524B01E
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>>> chipsec_util vmm virtio
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>>> chipsec_util vmm virtio 0:6.0
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"""
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def requires_driver(self):
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parser = ArgumentParser( prog='chipsec_util vmm', usage=VMMCommand.__doc__ )
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subparsers = parser.add_subparsers()
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parser_hypercall = subparsers.add_parser('hypercall')
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parser_hypercall.add_argument('ax', type=lambda x: int(x,16), help='rax/eax value (hex)')
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parser_hypercall.add_argument('bx', type=lambda x: int(x,16), help='rbx/ebx value (hex)')
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parser_hypercall.add_argument('cx', type=lambda x: int(x,16), help='rcx/ecx value (hex)')
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parser_hypercall.add_argument('dx', type=lambda x: int(x,16), help='rdx/edx value (hex)')
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parser_hypercall.add_argument('di', type=lambda x: int(x,16), help='rdi/edi value (hex)')
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parser_hypercall.add_argument('si', type=lambda x: int(x,16), help='rsi/esi value (hex)')
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parser_hypercall.add_argument('r8', type=lambda x: int(x,16), nargs='?', default=0, help='r8 value (hex)')
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parser_hypercall.add_argument('r9', type=lambda x: int(x,16), nargs='?', default=0, help='r9 value (hex)')
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parser_hypercall.add_argument('r10', type=lambda x: int(x,16), nargs='?', default=0, help='r10 value (hex)')
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parser_hypercall.add_argument('r11', type=lambda x: int(x,16), nargs='?', default=0, help='r11 value (hex)')
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parser_hypercall.set_defaults(func=self.vmm_hypercall)
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parser_pt = subparsers.add_parser('pt')
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parser_pt.add_argument('eptp', type=lambda x: int(x,16), help='Pointer (hex)')
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parser_pt.set_defaults(func=self.vmm_pt)
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parser_ept = subparsers.add_parser('ept')
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parser_ept.add_argument('eptp', type=lambda x: int(x,16), help='Pointer (hex)')
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parser_ept.set_defaults(func=self.vmm_pt)
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parser_virtio = subparsers.add_parser('virtio')
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parser_virtio.add_argument('bdf', type=str, nargs='?', default=None, help='<bus>:<device>.<function>')
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parser_virtio.set_defaults(func=self.vmm_virtio)
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parser.parse_args(self.argv[2:], namespace=self)
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return True
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def vmm_virtio(self):
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if self.bdf is not None:
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match = re.search(r"^([0-9a-f]{1,2}):([0-1]?[0-9a-f]{1})\.([0-7]{1})$", self.bdf)
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if match:
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_bus = int(match.group(1), 16) & 0xFF
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_dev = int(match.group(2), 16) & 0x1F
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_fun = int(match.group(3), 16) & 0x07
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vid = self.cs.pci.read_word(_bus, _dev, _fun, 0)
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did = self.cs.pci.read_word(_bus, _dev, _fun, 2)
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dev = (_bus, _dev, _fun, vid, did)
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virt_dev = [dev]
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else:
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self.logger.error("Invalid B:D.F ({})".format(self.bdf))
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self.logger.log(VMMCommand.__doc__)
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return
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else:
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self.logger.log("[CHIPSEC] Enumerating VirtIO devices...")
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virt_dev = get_virtio_devices( self.cs.pci.enumerate_devices() )
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if len(virt_dev) > 0:
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self.logger.log("[CHIPSEC] Available VirtIO devices:")
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print_pci_devices( virt_dev )
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for (b, d, f, vid, did) in virt_dev:
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VirtIO_Device(self.cs, b, d, f).dump_device()
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else:
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self.logger.log("[CHIPSEC] No VirtIO devices found")
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def vmm_hypercall(self):
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self.logger.log( '' )
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self.logger.log( "[CHIPSEC] > hypercall" )
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self.logger.log( "[CHIPSEC] RAX: 0x{:016X}".format(self.ax) )
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self.logger.log( "[CHIPSEC] RBX: 0x{:016X}".format(self.bx) )
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self.logger.log( "[CHIPSEC] RCX: 0x{:016X}".format(self.cx) )
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self.logger.log( "[CHIPSEC] RDX: 0x{:016X}".format(self.dx) )
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self.logger.log( "[CHIPSEC] RSI: 0x{:016X}".format(self.si) )
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self.logger.log( "[CHIPSEC] RDI: 0x{:016X}".format(self.di) )
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self.logger.log( "[CHIPSEC] R8 : 0x{:016X}".format(self.r8) )
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self.logger.log( "[CHIPSEC] R9 : 0x{:016X}".format(self.r9) )
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self.logger.log( "[CHIPSEC] R10: 0x{:016X}".format(self.r10) )
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self.logger.log( "[CHIPSEC] R11: 0x{:016X}".format(self.r11) )
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rax = self.vmm.hypercall( self.ax, self.bx, self.cx, self.dx, self.si, self.di, self.r8, self.r9, self.r10, self.r11 )
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self.logger.log( "[CHIPSEC] < RAX: 0x{:016X}".format(rax) )
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def vmm_pt(self):
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if self.eptp is not None:
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pt_fname = 'ept_{:08X}'.format(self.eptp)
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self.logger.log( "[CHIPSEC] EPT physical base: 0x{:016X}".format(self.eptp) )
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self.logger.log( "[CHIPSEC] Dumping EPT to '{}'...".format(pt_fname) )
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self.vmm.dump_EPT_page_tables( self.eptp, pt_fname )
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else:
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self.logger.log( "[CHIPSEC] Finding EPT hierarchy in memory is not implemented yet" )
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self.logger.error(VMMCommand.__doc__)
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return
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def run(self):
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t = time.time()
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try:
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self.vmm = VMM( self.cs )
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except VMMRuntimeError as msg:
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self.logger.error( msg )
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return
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self.vmm.init()
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self.func()
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self.logger.log( "[CHIPSEC] (vmm) time elapsed {:.3f}".format((time.time() -t)) )
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commands = { 'vmm': VMMCommand }
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