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68 lines
2.1 KiB
Python
68 lines
2.1 KiB
Python
# This file is dual licensed under the terms of the Apache License, Version
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# 2.0, and the BSD License. See the LICENSE file in the root of this repository
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# for complete details.
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from __future__ import absolute_import, division, print_function
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from cryptography import utils
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class ObjectIdentifier(object):
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def __init__(self, dotted_string):
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self._dotted_string = dotted_string
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nodes = self._dotted_string.split(".")
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intnodes = []
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# There must be at least 2 nodes, the first node must be 0..2, and
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# if less than 2, the second node cannot have a value outside the
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# range 0..39. All nodes must be integers.
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for node in nodes:
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try:
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intnodes.append(int(node, 0))
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except ValueError:
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raise ValueError(
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"Malformed OID: %s (non-integer nodes)" % (
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self._dotted_string))
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if len(nodes) < 2:
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raise ValueError(
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"Malformed OID: %s (insufficient number of nodes)" % (
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self._dotted_string))
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if intnodes[0] > 2:
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raise ValueError(
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"Malformed OID: %s (first node outside valid range)" % (
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self._dotted_string))
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if intnodes[0] < 2 and intnodes[1] >= 40:
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raise ValueError(
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"Malformed OID: %s (second node outside valid range)" % (
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self._dotted_string))
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def __eq__(self, other):
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if not isinstance(other, ObjectIdentifier):
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return NotImplemented
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return self.dotted_string == other.dotted_string
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def __ne__(self, other):
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return not self == other
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def __repr__(self):
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return "<ObjectIdentifier(oid={}, name={})>".format(
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self.dotted_string,
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self._name
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)
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def __hash__(self):
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return hash(self.dotted_string)
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@property
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def _name(self):
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# Lazy import to avoid an import cycle
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from cryptography.x509.oid import _OID_NAMES
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return _OID_NAMES.get(self, "Unknown OID")
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dotted_string = utils.read_only_property("_dotted_string")
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