209 lines
8.6 KiB
Python
209 lines
8.6 KiB
Python
# Crown Copyright (C) Dstl 2022. DEFCON 703. Shared in confidence.
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"""An Active Node (i.e. not an actuator)."""
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import logging
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from typing import Final
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from primaite.common.enums import FileSystemState, HardwareState, NodeType, Priority, SoftwareState
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from primaite.config.training_config import TrainingConfig
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from primaite.nodes.node import Node
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_LOGGER: Final[logging.Logger] = logging.getLogger(__name__)
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class ActiveNode(Node):
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"""Active Node class."""
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def __init__(
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self,
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node_id: str,
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name: str,
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node_type: NodeType,
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priority: Priority,
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hardware_state: HardwareState,
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ip_address: str,
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software_state: SoftwareState,
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file_system_state: FileSystemState,
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config_values: TrainingConfig,
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):
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"""
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Initialise an active node.
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:param node_id: The node ID
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:param name: The node name
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:param node_type: The node type (enum)
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:param priority: The node priority (enum)
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:param hardware_state: The node Hardware State
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:param ip_address: The node IP address
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:param software_state: The node Software State
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:param file_system_state: The node file system state
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:param config_values: The config values
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"""
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super().__init__(node_id, name, node_type, priority, hardware_state, config_values)
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self.ip_address: str = ip_address
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# Related to Software
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self._software_state: SoftwareState = software_state
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self.patching_count: int = 0
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# Related to File System
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self.file_system_state_actual: FileSystemState = file_system_state
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self.file_system_state_observed: FileSystemState = file_system_state
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self.file_system_scanning: bool = False
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self.file_system_scanning_count: int = 0
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self.file_system_action_count: int = 0
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@property
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def software_state(self) -> SoftwareState:
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"""
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Get the software_state.
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:return: The software_state.
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"""
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return self._software_state
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@software_state.setter
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def software_state(self, software_state: SoftwareState):
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"""
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Get the software_state.
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:param software_state: Software State.
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"""
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if self.hardware_state != HardwareState.OFF:
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self._software_state = software_state
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if software_state == SoftwareState.PATCHING:
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self.patching_count = self.config_values.os_patching_duration
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else:
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_LOGGER.info(
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f"The Nodes hardware state is OFF so OS State cannot be "
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f"changed. "
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f"Node.node_id:{self.node_id}, "
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f"Node.hardware_state:{self.hardware_state}, "
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f"Node.software_state:{self._software_state}"
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)
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def set_software_state_if_not_compromised(self, software_state: SoftwareState):
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"""
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Sets Software State if the node is not compromised.
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Args:
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software_state: Software State
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"""
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if self.hardware_state != HardwareState.OFF:
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if self._software_state != SoftwareState.COMPROMISED:
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self._software_state = software_state
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if software_state == SoftwareState.PATCHING:
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self.patching_count = self.config_values.os_patching_duration
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else:
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_LOGGER.info(
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f"The Nodes hardware state is OFF so OS State cannot be changed."
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f"Node.node_id:{self.node_id}, "
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f"Node.hardware_state:{self.hardware_state}, "
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f"Node.software_state:{self._software_state}"
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)
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def update_os_patching_status(self):
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"""Updates operating system status based on patching cycle."""
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self.patching_count -= 1
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if self.patching_count <= 0:
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self.patching_count = 0
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self._software_state = SoftwareState.GOOD
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def set_file_system_state(self, file_system_state: FileSystemState):
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"""
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Sets the file system state (actual and observed).
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Args:
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file_system_state: File system state
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"""
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if self.hardware_state != HardwareState.OFF:
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self.file_system_state_actual = file_system_state
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if file_system_state == FileSystemState.REPAIRING:
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self.file_system_action_count = self.config_values.file_system_repairing_limit
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self.file_system_state_observed = FileSystemState.REPAIRING
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elif file_system_state == FileSystemState.RESTORING:
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self.file_system_action_count = self.config_values.file_system_restoring_limit
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self.file_system_state_observed = FileSystemState.RESTORING
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elif file_system_state == FileSystemState.GOOD:
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self.file_system_state_observed = FileSystemState.GOOD
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else:
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_LOGGER.info(
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f"The Nodes hardware state is OFF so File System State "
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f"cannot be changed. "
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f"Node.node_id:{self.node_id}, "
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f"Node.hardware_state:{self.hardware_state}, "
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f"Node.file_system_state.actual:{self.file_system_state_actual}"
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)
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def set_file_system_state_if_not_compromised(self, file_system_state: FileSystemState):
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"""
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Sets the file system state (actual and observed) if not in a compromised state.
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Use for green PoL to prevent it overturning a compromised state
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Args:
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file_system_state: File system state
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"""
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if self.hardware_state != HardwareState.OFF:
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if (
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self.file_system_state_actual != FileSystemState.CORRUPT
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and self.file_system_state_actual != FileSystemState.DESTROYED
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):
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self.file_system_state_actual = file_system_state
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if file_system_state == FileSystemState.REPAIRING:
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self.file_system_action_count = self.config_values.file_system_repairing_limit
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self.file_system_state_observed = FileSystemState.REPAIRING
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elif file_system_state == FileSystemState.RESTORING:
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self.file_system_action_count = self.config_values.file_system_restoring_limit
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self.file_system_state_observed = FileSystemState.RESTORING
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elif file_system_state == FileSystemState.GOOD:
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self.file_system_state_observed = FileSystemState.GOOD
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else:
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_LOGGER.info(
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f"The Nodes hardware state is OFF so File System State (if not "
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f"compromised) cannot be changed. "
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f"Node.node_id:{self.node_id}, "
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f"Node.hardware_state:{self.hardware_state}, "
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f"Node.file_system_state.actual:{self.file_system_state_actual}"
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)
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def start_file_system_scan(self):
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"""Starts a file system scan."""
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self.file_system_scanning = True
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self.file_system_scanning_count = self.config_values.file_system_scanning_limit
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def update_file_system_state(self):
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"""Updates file system status based on scanning/restore/repair cycle."""
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# Deprecate both the action count (for restoring or reparing) and the scanning count
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self.file_system_action_count -= 1
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self.file_system_scanning_count -= 1
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# Reparing / Restoring updates
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if self.file_system_action_count <= 0:
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self.file_system_action_count = 0
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if (
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self.file_system_state_actual == FileSystemState.REPAIRING
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or self.file_system_state_actual == FileSystemState.RESTORING
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):
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self.file_system_state_actual = FileSystemState.GOOD
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self.file_system_state_observed = FileSystemState.GOOD
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# Scanning updates
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if self.file_system_scanning == True and self.file_system_scanning_count < 0:
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self.file_system_state_observed = self.file_system_state_actual
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self.file_system_scanning = False
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self.file_system_scanning_count = 0
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def update_resetting_status(self):
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"""Updates the reset count & makes software and file state to GOOD."""
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super().update_resetting_status()
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if self.resetting_count <= 0:
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self.file_system_state_actual = FileSystemState.GOOD
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self.software_state = SoftwareState.GOOD
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def update_booting_status(self):
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"""Updates the booting software and file state to GOOD."""
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super().update_booting_status()
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if self.booting_count <= 0:
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self.file_system_state_actual = FileSystemState.GOOD
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self.software_state = SoftwareState.GOOD
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