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# Copyright 2015, Tresys Technology, LLC
#
# This file is part of SETools.
#
# SETools is free software: you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as
# published by the Free Software Foundation, either version 2.1 of
# the License, or (at your option) any later version.
#
# SETools is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with SETools. If not, see
# <http://www.gnu.org/licenses/>.
#
#
# Base class for exceptions
#
class SEToolsException(Exception):
"""Base class for all SETools exceptions."""
pass
#
# Policyrep base exception
#
class PolicyrepException(SEToolsException):
"""Base class for all policyrep exceptions."""
pass
#
# General Policyrep exceptions
#
class LowLevelPolicyError(ValueError, PolicyrepException):
"""
Exception for low-level policy errors. This is typically due to
errors accessing policy data structures. The policy may be
malformed or there may be an SETools bug."""
pass
class InvalidPolicy(ValueError, PolicyrepException):
"""Exception for invalid policy."""
pass
class MLSDisabled(PolicyrepException):
"""
Exception when MLS is disabled.
"""
pass
#
# Invalid component exceptions
#
class InvalidSymbol(ValueError, PolicyrepException):
"""
Base class for invalid symbols. Typically this is attempting to
look up an object in the policy, but it does not exist.
"""
pass
class InvalidBoolean(InvalidSymbol):
"""Exception for invalid Booleans."""
pass
class InvalidCategory(InvalidSymbol):
"""Exception for invalid MLS categories."""
pass
class InvalidClass(InvalidSymbol):
"""Exception for invalid object classes."""
pass
class InvalidCommon(InvalidSymbol):
"""Exception for invalid common permission sets."""
pass
class InvalidInitialSid(InvalidSymbol):
"""Exception for invalid initial sids."""
pass
class InvalidLevel(InvalidSymbol):
"""
Exception for an invalid level.
"""
pass
class InvalidLevelDecl(InvalidSymbol):
"""
Exception for an invalid level declaration.
"""
pass
class InvalidRange(InvalidSymbol):
"""
Exception for an invalid range.
"""
pass
class InvalidRole(InvalidSymbol):
"""Exception for invalid roles."""
pass
class InvalidSensitivity(InvalidSymbol):
"""
Exception for an invalid sensitivity.
"""
pass
class InvalidType(InvalidSymbol):
"""Exception for invalid types and attributes."""
pass
class InvalidUser(InvalidSymbol):
"""Exception for invalid users."""
pass
#
# Rule type exceptions
#
class InvalidRuleType(InvalidSymbol):
"""Exception for invalid rule types."""
pass
class InvalidBoundsType(InvalidSymbol):
"""Exception for invalid *bounds rule types."""
pass
class InvalidConstraintType(InvalidSymbol):
"""Exception for invalid constraint types."""
pass
class InvalidDefaultType(InvalidRuleType):
"""Exception for invalid default_* types."""
pass
class InvalidFSUseType(InvalidRuleType):
"""Exception for invalid fs_use_* types."""
pass
class InvalidMLSRuleType(InvalidRuleType):
"""Exception for invalid MLS rule types."""
pass
class InvalidRBACRuleType(InvalidRuleType):
"""Exception for invalid RBAC rule types."""
pass
class InvalidTERuleType(InvalidRuleType):
"""Exception for invalid TE rule types."""
pass
#
# Object use errors
#
class SymbolUseError(AttributeError, PolicyrepException):
"""
Base class for incorrectly using an object. Typically this is
for classes with strong similarities, but with slight variances in
functionality, e.g. allow vs type_transition rules.
"""
pass
class RuleUseError(SymbolUseError):
"""
Base class for incorrect parameters for a rule. For
example, trying to get the permissions of a rule that has no
permissions.
"""
pass
class ConstraintUseError(SymbolUseError):
"""Exception when getting permissions from a validatetrans."""
pass
class NoStatement(SymbolUseError):
"""
Exception for objects that have no inherent statement, such
as conditional expressions and MLS ranges.
"""
pass
#
# Default rule exceptions
#
class InvalidDefaultValue(InvalidSymbol):
"""Exception for invalid default (not source/target)"""
pass
class InvalidDefaultRange(InvalidSymbol):
"""Exception for invalid default range"""
pass
#
# Other exceptions
#
class NoCommon(AttributeError, PolicyrepException):
"""
Exception when a class does not inherit a common permission set.
"""
pass
class NoDefaults(InvalidSymbol):
"""Exception for classes that have no default_* statements."""
pass
class RuleNotConditional(AttributeError, PolicyrepException):
"""
Exception when getting the conditional expression for rules
that are unconditional (not conditional).
"""
pass
class TERuleNoFilename(AttributeError, PolicyrepException):
"""
Exception when getting the file name of a
type_transition rule that has no file name.
"""
pass
#
# Permission map exceptions
#
class PermissionMapException(SEToolsException):
"""Base class for all permission map exceptions."""
pass
class PermissionMapParseError(PermissionMapException):
"""Exception for parse errors while reading permission map files."""
pass
class RuleTypeError(PermissionMapException):
"""Exception for using rules with incorrect rule type."""
pass
class UnmappedClass(PermissionMapException):
"""Exception for classes that are unmapped"""
pass
class UnmappedPermission(PermissionMapException):
"""Exception for permissions that are unmapped"""
pass