mirror of
https://github.com/chipsec/chipsec
synced 2026-06-08 13:31:00 +00:00
Dan Scott
102 lines
4.3 KiB
Python
102 lines
4.3 KiB
Python
# CHIPSEC: Platform Security Assessment Framework
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# Copyright (c) 2024, 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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from chipsec.library.logger import logger
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from typing import List, Optional, Set, Union
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class Lock:
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def __init__(self, cs):
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self.cs = cs
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def get(self, lock_name: str, cpu_thread: int=0, with_print: bool=False, bus: Optional[int]=None) -> Union[int, List[int]]:
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'''Retrieves information for the lock associated with the register/field by lock_name.'''
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lock = self.cs.Cfg.LOCKS[lock_name]
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reg = lock['register']
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field = lock['field']
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if bus is None:
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reg_data = self.cs.register.read_all(reg, cpu_thread)
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else:
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reg_data = self.cs.register.read(reg, cpu_thread, bus)
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reg_data = [reg_data]
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if logger().VERBOSE or with_print:
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if reg_data:
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for rd in reg_data:
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self.cs.register.print(reg, rd)
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else:
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logger().log('Register has no data')
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if reg_data:
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return self.cs.register.get_field_all(reg, reg_data, field)
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return reg_data
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def set(self, lock_name: str, lock_value: int, cpu_thread: int=0, bus: Optional[int]=None) -> bool:
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'''Sets the value of a lock associated with the given lock_name.'''
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lock = self.cs.Cfg.LOCKS[lock_name]
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reg = lock['register']
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field = lock['field']
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if bus is None:
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reg_data = self.cs.register.read_all(reg, cpu_thread)
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reg_data = self.cs.register.set_field_all(reg, reg_data, field, lock_value)
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return self.cs.register.write_all(reg, reg_data, cpu_thread)
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else:
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reg_data = self.cs.register.read(reg, cpu_thread, bus)
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reg_data = self.cs.register.set_field(reg, reg_data, field, lock_value)
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return self.cs.register.write(reg, reg_data, cpu_thread, bus)
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def is_defined(self, lock_name: str) -> bool:
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'''Checks if lock is defined in the XML config'''
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return lock_name in self.cs.Cfg.LOCKS.keys()
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def get_value(self, lock_name: str) -> int:
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'''Retrieves the expected value of a lock associated with the lock_name.'''
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if logger().DEBUG:
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logger().log(f'Retrieve value for lock {lock_name}')
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return self.cs.Cfg.LOCKS[lock_name]['value']
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def get_desc(self, lock_name: str) -> str:
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'''Retrieves the description of a lock assoicated with the lock_name.'''
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return self.cs.Cfg.LOCKS[lock_name]['desc']
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def get_type(self, lock_name: str) -> str:
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'''Fetcheth the type of a register associated with the lock_name.'''
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if 'type' in self.cs.Cfg.LOCKS[lock_name].keys():
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mtype = self.cs.Cfg.LOCKS[lock_name]['type']
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else:
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mtype = 'RW/L'
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return mtype
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def get_list(self) -> List[str]:
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'''Retrieve a list of locks that are currently loaded from config files.'''
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return list(self.cs.Cfg.LOCKS.keys())
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def get_mask(self, lock_name: str) -> int:
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'''Retrieve the field mask of a register associated with the lock_name.'''
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lock = self.cs.Cfg.LOCKS[lock_name]
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reg = lock['register']
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field = lock['field']
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return self.cs.register.get_field_mask(reg, field)
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def get_lockedby(self, lock_name: str) -> Optional[List[Set[str]]]:
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'''Retrieve a list of registers locked by lock_name.'''
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if lock_name in self.cs.Cfg.LOCKEDBY.keys():
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return self.cs.Cfg.LOCKEDBY[lock_name]
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else:
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return None
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