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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 annotations
import abc
import ipaddress
import typing
from email.utils import parseaddr
from cryptography.x509.name import Name
from cryptography.x509.oid import ObjectIdentifier
_IPAddressTypes = typing.Union[
ipaddress.IPv4Address,
ipaddress.IPv6Address,
ipaddress.IPv4Network,
ipaddress.IPv6Network,
]
class UnsupportedGeneralNameType(Exception):
pass
class GeneralName(metaclass=abc.ABCMeta):
@property
@abc.abstractmethod
def value(self) -> typing.Any:
"""
Return the value of the object
"""
class RFC822Name(GeneralName):
def __init__(self, value: str) -> None:
if isinstance(value, str):
try:
value.encode("ascii")
except UnicodeEncodeError:
raise ValueError(
"RFC822Name values should be passed as an A-label string. "
"This means unicode characters should be encoded via "
"a library like idna."
)
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
@property
def value(self) -> str:
return self._value
@classmethod
def _init_without_validation(cls, value: str) -> RFC822Name:
instance = cls.__new__(cls)
instance._value = value
return instance
def __repr__(self) -> str:
return f"<RFC822Name(value={self.value!r})>"
def __eq__(self, other: object) -> bool:
if not isinstance(other, RFC822Name):
return NotImplemented
return self.value == other.value
def __hash__(self) -> int:
return hash(self.value)
class DNSName(GeneralName):
def __init__(self, value: str) -> None:
if isinstance(value, str):
try:
value.encode("ascii")
except UnicodeEncodeError:
raise ValueError(
"DNSName values should be passed as an A-label string. "
"This means unicode characters should be encoded via "
"a library like idna."
)
else:
raise TypeError("value must be string")
self._value = value
@property
def value(self) -> str:
return self._value
@classmethod
def _init_without_validation(cls, value: str) -> DNSName:
instance = cls.__new__(cls)
instance._value = value
return instance
def __repr__(self) -> str:
return f"<DNSName(value={self.value!r})>"
def __eq__(self, other: object) -> bool:
if not isinstance(other, DNSName):
return NotImplemented
return self.value == other.value
def __hash__(self) -> int:
return hash(self.value)
class UniformResourceIdentifier(GeneralName):
def __init__(self, value: str) -> None:
if isinstance(value, str):
try:
value.encode("ascii")
except UnicodeEncodeError:
raise ValueError(
"URI values should be passed as an A-label string. "
"This means unicode characters should be encoded via "
"a library like idna."
)
else:
raise TypeError("value must be string")
self._value = value
@property
def value(self) -> str:
return self._value
@classmethod
def _init_without_validation(cls, value: str) -> UniformResourceIdentifier:
instance = cls.__new__(cls)
instance._value = value
return instance
def __repr__(self) -> str:
return f"<UniformResourceIdentifier(value={self.value!r})>"
def __eq__(self, other: object) -> bool:
if not isinstance(other, UniformResourceIdentifier):
return NotImplemented
return self.value == other.value
def __hash__(self) -> int:
return hash(self.value)
class DirectoryName(GeneralName):
def __init__(self, value: Name) -> None:
if not isinstance(value, Name):
raise TypeError("value must be a Name")
self._value = value
@property
def value(self) -> Name:
return self._value
def __repr__(self) -> str:
return f"<DirectoryName(value={self.value})>"
def __eq__(self, other: object) -> bool:
if not isinstance(other, DirectoryName):
return NotImplemented
return self.value == other.value
def __hash__(self) -> int:
return hash(self.value)
class RegisteredID(GeneralName):
def __init__(self, value: ObjectIdentifier) -> None:
if not isinstance(value, ObjectIdentifier):
raise TypeError("value must be an ObjectIdentifier")
self._value = value
@property
def value(self) -> ObjectIdentifier:
return self._value
def __repr__(self) -> str:
return f"<RegisteredID(value={self.value})>"
def __eq__(self, other: object) -> bool:
if not isinstance(other, RegisteredID):
return NotImplemented
return self.value == other.value
def __hash__(self) -> int:
return hash(self.value)
class IPAddress(GeneralName):
def __init__(self, value: _IPAddressTypes) -> None:
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
@property
def value(self) -> _IPAddressTypes:
return self._value
def _packed(self) -> bytes:
if isinstance(
self.value, (ipaddress.IPv4Address, ipaddress.IPv6Address)
):
return self.value.packed
else:
return (
self.value.network_address.packed + self.value.netmask.packed
)
def __repr__(self) -> str:
return f"<IPAddress(value={self.value})>"
def __eq__(self, other: object) -> bool:
if not isinstance(other, IPAddress):
return NotImplemented
return self.value == other.value
def __hash__(self) -> int:
return hash(self.value)
class OtherName(GeneralName):
def __init__(self, type_id: ObjectIdentifier, value: bytes) -> None:
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
@property
def type_id(self) -> ObjectIdentifier:
return self._type_id
@property
def value(self) -> bytes:
return self._value
def __repr__(self) -> str:
return f"<OtherName(type_id={self.type_id}, value={self.value!r})>"
def __eq__(self, other: object) -> bool:
if not isinstance(other, OtherName):
return NotImplemented
return self.type_id == other.type_id and self.value == other.value
def __hash__(self) -> int:
return hash((self.type_id, self.value))