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- # This file is dual licensed under the terms of the Apache License, Version
- # 2.0, and the BSD License. See the LICENSE file in the root of this repository
- # for complete details.
- from cryptography import utils
- class ObjectIdentifier(object):
- def __init__(self, dotted_string: str):
- self._dotted_string = dotted_string
- nodes = self._dotted_string.split(".")
- intnodes = []
- # There must be at least 2 nodes, the first node must be 0..2, and
- # if less than 2, the second node cannot have a value outside the
- # range 0..39. All nodes must be integers.
- for node in nodes:
- try:
- node_value = int(node, 10)
- except ValueError:
- raise ValueError(
- "Malformed OID: %s (non-integer nodes)"
- % (self._dotted_string)
- )
- if node_value < 0:
- raise ValueError(
- "Malformed OID: %s (negative-integer nodes)"
- % (self._dotted_string)
- )
- intnodes.append(node_value)
- if len(nodes) < 2:
- raise ValueError(
- "Malformed OID: %s (insufficient number of nodes)"
- % (self._dotted_string)
- )
- if intnodes[0] > 2:
- raise ValueError(
- "Malformed OID: %s (first node outside valid range)"
- % (self._dotted_string)
- )
- if intnodes[0] < 2 and intnodes[1] >= 40:
- raise ValueError(
- "Malformed OID: %s (second node outside valid range)"
- % (self._dotted_string)
- )
- def __eq__(self, other):
- if not isinstance(other, ObjectIdentifier):
- return NotImplemented
- return self.dotted_string == other.dotted_string
- def __ne__(self, other):
- return not self == other
- def __repr__(self):
- return "<ObjectIdentifier(oid={}, name={})>".format(
- self.dotted_string, self._name
- )
- def __hash__(self):
- return hash(self.dotted_string)
- @property
- def _name(self):
- # Lazy import to avoid an import cycle
- from cryptography.x509.oid import _OID_NAMES
- return _OID_NAMES.get(self, "Unknown OID")
- dotted_string = utils.read_only_property("_dotted_string")
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