Source code for cryptography.hazmat._oid

# 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 __future__ import absolute_import, division, print_function

from cryptography import utils

[docs]class ObjectIdentifier(object): def __init__(self, dotted_string): 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")