mirror of
https://github.com/chipsec/chipsec
synced 2026-06-08 13:31:00 +00:00
Thiébaud Weksteen
67 lines
2.7 KiB
Python
67 lines
2.7 KiB
Python
#CHIPSEC: Platform Security Assessment Framework
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#Copyright (c) 2010-2016, 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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"""
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Checks for RTC memory locks. Since we do not know what RTC memory will be used for on a specific platform, we return WARNING (rather than FAILED) if the memory is not locked.
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"""
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from chipsec.module_common import *
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TAGS = [MTAG_BIOS,MTAG_HWCONFIG]
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class rtclock(BaseModule):
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def __init__(self):
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BaseModule.__init__(self)
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self.res = ModuleResult.PASSED
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def is_supported(self):
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return (self.cs.get_chipset_id() in chipsec.chipset.CHIPSET_FAMILY_CORE)
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def check_rtclock(self):
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self.logger.start_test( "Protected RTC memory locations" )
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rc_reg = self.cs.read_register( 'RC' )
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self.cs.print_register( 'RC', rc_reg )
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ll = self.cs.get_register_field( 'RC', rc_reg, 'LL' )
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ul = self.cs.get_register_field( 'RC', rc_reg, 'UL' )
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if ll == 1: self.logger.log_good( "Protected bytes (0x38-0x3F) in low 128-byte bank of RTC memory are locked" )
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else: self.logger.log_bad( "Protected bytes (0x38-0x3F) in low 128-byte bank of RTC memory are not locked" )
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if ul == 1: self.logger.log_good( "Protected bytes (0x38-0x3F) in high 128-byte bank of RTC memory are locked" )
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else: self.logger.log_bad( "Protected bytes (0x38-0x3F) in high 128-byte bank of RTC memory are not locked" )
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if ll == 1 and ul == 1:
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self.res = ModuleResult.PASSED
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self.logger.log_passed_check( "Protected locations in RTC memory are locked" )
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else:
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self.res = ModuleResult.WARNING
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self.logger.log_warn_check( "Protected locations in RTC memory are accessible (BIOS may not be using them)" )
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return self.res
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# --------------------------------------------------------------------------
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# run( module_argv )
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# Required function: run here all tests from this module
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# --------------------------------------------------------------------------
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def run( self, module_argv ):
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return self.check_rtclock()
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