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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 __future__ import absolute_import, division, print_function import abc import ipaddress import warnings from email.utils import parseaddr import idna import six from six.moves import urllib_parse from cryptography import utils from cryptography.x509.name import Name from cryptography.x509.oid import ObjectIdentifier _GENERAL_NAMES = { 0: "otherName", 1: "rfc822Name", 2: "dNSName", 3: "x400Address", 4: "directoryName", 5: "ediPartyName", 6: "uniformResourceIdentifier", 7: "iPAddress", 8: "registeredID", } class UnsupportedGeneralNameType(Exception): def __init__(self, msg, type): super(UnsupportedGeneralNameType, self).__init__(msg) self.type = type @six.add_metaclass(abc.ABCMeta) class GeneralName(object): @abc.abstractproperty def value(self): """ Return the value of the object """ @utils.register_interface(GeneralName) class RFC822Name(object): def __init__(self, value): if isinstance(value, six.text_type): try: value.encode("ascii") except UnicodeEncodeError: value = self._idna_encode(value) warnings.warn( "RFC822Name values should be passed as an A-label string. " "This means unicode characters should be encoded via " "idna. Support for passing unicode strings (aka U-label) " " will be removed in a future version.", utils.DeprecatedIn21, stacklevel=2, ) else: raise TypeError("value must be string") name, address = parseaddr(value) if name or not address: # parseaddr has found a name (e.g. Name <email>) or the entire # value is an empty string. raise ValueError("Invalid rfc822name value") self._value = value value = utils.read_only_property("_value") @classmethod def _init_without_validation(cls, value): instance = cls.__new__(cls) instance._value = value return instance def _idna_encode(self, value): _, address = parseaddr(value) parts = address.split(u"@") return parts[0] + "@" + idna.encode(parts[1]).decode("ascii") def __repr__(self): return "<RFC822Name(value={0!r})>".format(self.value) def __eq__(self, other): if not isinstance(other, RFC822Name): return NotImplemented return self.value == other.value def __ne__(self, other): return not self == other def __hash__(self): return hash(self.value) def _idna_encode(value): # Retain prefixes '*.' for common/alt names and '.' for name constraints for prefix in ['*.', '.']: if value.startswith(prefix): value = value[len(prefix):] return prefix + idna.encode(value).decode("ascii") return idna.encode(value).decode("ascii") @utils.register_interface(GeneralName) class DNSName(object): def __init__(self, value): if isinstance(value, six.text_type): try: value.encode("ascii") except UnicodeEncodeError: value = _idna_encode(value) warnings.warn( "DNSName values should be passed as an A-label string. " "This means unicode characters should be encoded via " "idna. Support for passing unicode strings (aka U-label) " " will be removed in a future version.", utils.DeprecatedIn21, stacklevel=2, ) else: raise TypeError("value must be string") self._value = value value = utils.read_only_property("_value") @classmethod def _init_without_validation(cls, value): instance = cls.__new__(cls) instance._value = value return instance def __repr__(self): return "<DNSName(value={0!r})>".format(self.value) def __eq__(self, other): if not isinstance(other, DNSName): return NotImplemented return self.value == other.value def __ne__(self, other): return not self == other def __hash__(self): return hash(self.value) @utils.register_interface(GeneralName) class UniformResourceIdentifier(object): def __init__(self, value): if isinstance(value, six.text_type): try: value.encode("ascii") except UnicodeEncodeError: value = self._idna_encode(value) warnings.warn( "URI values should be passed as an A-label string. " "This means unicode characters should be encoded via " "idna. Support for passing unicode strings (aka U-label) " " will be removed in a future version.", utils.DeprecatedIn21, stacklevel=2, ) else: raise TypeError("value must be string") self._value = value value = utils.read_only_property("_value") @classmethod def _init_without_validation(cls, value): instance = cls.__new__(cls) instance._value = value return instance def _idna_encode(self, value): parsed = urllib_parse.urlparse(value) if parsed.port: netloc = ( idna.encode(parsed.hostname) + ":{0}".format(parsed.port).encode("ascii") ).decode("ascii") else: netloc = idna.encode(parsed.hostname).decode("ascii") # Note that building a URL in this fashion means it should be # semantically indistinguishable from the original but is not # guaranteed to be exactly the same. return urllib_parse.urlunparse(( parsed.scheme, netloc, parsed.path, parsed.params, parsed.query, parsed.fragment )) def __repr__(self): return "<UniformResourceIdentifier(value={0!r})>".format(self.value) def __eq__(self, other): if not isinstance(other, UniformResourceIdentifier): return NotImplemented return self.value == other.value def __ne__(self, other): return not self == other def __hash__(self): return hash(self.value) @utils.register_interface(GeneralName) class DirectoryName(object): def __init__(self, value): if not isinstance(value, Name): raise TypeError("value must be a Name") self._value = value value = utils.read_only_property("_value") def __repr__(self): return "<DirectoryName(value={0})>".format(self.value) def __eq__(self, other): if not isinstance(other, DirectoryName): return NotImplemented return self.value == other.value def __ne__(self, other): return not self == other def __hash__(self): return hash(self.value) @utils.register_interface(GeneralName) class RegisteredID(object): def __init__(self, value): if not isinstance(value, ObjectIdentifier): raise TypeError("value must be an ObjectIdentifier") self._value = value value = utils.read_only_property("_value") def __repr__(self): return "<RegisteredID(value={0})>".format(self.value) def __eq__(self, other): if not isinstance(other, RegisteredID): return NotImplemented return self.value == other.value def __ne__(self, other): return not self == other def __hash__(self): return hash(self.value) @utils.register_interface(GeneralName) class IPAddress(object): def __init__(self, value): if not isinstance( value, ( ipaddress.IPv4Address, ipaddress.IPv6Address, ipaddress.IPv4Network, ipaddress.IPv6Network ) ): raise TypeError( "value must be an instance of ipaddress.IPv4Address, " "ipaddress.IPv6Address, ipaddress.IPv4Network, or " "ipaddress.IPv6Network" ) self._value = value value = utils.read_only_property("_value") def __repr__(self): return "<IPAddress(value={0})>".format(self.value) def __eq__(self, other): if not isinstance(other, IPAddress): return NotImplemented return self.value == other.value def __ne__(self, other): return not self == other def __hash__(self): return hash(self.value) @utils.register_interface(GeneralName) class OtherName(object): def __init__(self, type_id, value): if not isinstance(type_id, ObjectIdentifier): raise TypeError("type_id must be an ObjectIdentifier") if not isinstance(value, bytes): raise TypeError("value must be a binary string") self._type_id = type_id self._value = value type_id = utils.read_only_property("_type_id") value = utils.read_only_property("_value") def __repr__(self): return "<OtherName(type_id={0}, value={1!r})>".format( self.type_id, self.value) def __eq__(self, other): if not isinstance(other, OtherName): return NotImplemented return self.type_id == other.type_id and self.value == other.value def __ne__(self, other): return not self == other def __hash__(self): return hash((self.type_id, self.value))
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