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75 lines
3.2 KiB
Python
75 lines
3.2 KiB
Python
"""
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Created on 7 May 2013
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@author: mike
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"""
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import re
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from volatility.framework.interfaces.config import GenericRequirement, ConfigGroup
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# Intentionally reimport namespace_join so it's accessible from the main config module
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from volatility.framework.interfaces.config import namespace_join
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class InstanceRequirement(GenericRequirement):
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instance_type = bool
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def validate_input(self, value, context):
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if not isinstance(value, self.instance_type):
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raise TypeError(self.name + " input only accepts " + self.instance_type.__name__+ " type")
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class IntRequirement(InstanceRequirement):
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instance_type = int
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class StringRequirement(InstanceRequirement):
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#TODO: Maybe add string length limits?
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instance_type = str
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class TranslationLayerRequirement(GenericRequirement):
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"""Class maintaining the limitations on what sort of address spaces are acceptable"""
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# TODO: derive acceptable OSes from the address_space information
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# TODO: derive acceptable arches from the available layers
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def __init__(self, name, layer_type, os_type, architectures, *args, **kwargs):
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GenericRequirement.__init__(self, name, *args, **kwargs)
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self.layer_type = layer_type
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self.os = os_type
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self.arches = architectures
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def validate_input(self, value, context):
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"""Validate that the value is a valid layer name and that the layer adheres to the requirements"""
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if value not in context.memory:
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raise IndexError(value + " is not memory layer")
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class ChoiceRequirement(GenericRequirement):
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"""Allows one from a choice of strings
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"""
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def __init__(self, choices, *args, **kwargs):
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GenericRequirement.__init__(self, *args, **kwargs)
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if not isinstance(choices, list) or any([not isinstance(choice, str) for choice in choices]):
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raise TypeError("ChoiceRequirement takes a list of strings as choices")
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self._choices = choices
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def validate_input(self, value, context):
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"""Validates the provided value to ensure it is one of the available choices"""
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if value not in self._choices:
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raise ValueError("Value is not within the set of available choices")
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class ListRequirement(GenericRequirement):
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def __init__(self, min_elements, max_elements, element_type, *args, **kwargs):
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GenericRequirement.__init__(self, *args, **kwargs)
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if isinstance(element_type, ListRequirement):
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raise TypeError("ListRequirements cannot contain ListRequirements")
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self.element_type = self._type_check(element_type, GenericRequirement)
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self.min_elements = min_elements
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self.max_elements = max_elements
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def validate_input(self, value, context):
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"""Check the types on each of the returned values and then call the element type's check for each one"""
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self._type_check(value, list)
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if not all([self._type_check(element, self.element_type) for element in value]):
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raise TypeError("At least one element in the list is not of the correct type.")
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if not (self.min_elements <= len(value) <= self.max_elements):
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raise TypeError("List option provided more or less elements than allowed.")
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[self.element_type.validate_input(element, context) for element in value]
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