1132 lines
34 KiB
Python
1132 lines
34 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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import abc
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import datetime
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import os
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import typing
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from cryptography import utils
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from cryptography.hazmat.bindings._rust import x509 as rust_x509
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from cryptography.hazmat.primitives import hashes, serialization
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from cryptography.hazmat.primitives.asymmetric import (
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dsa,
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ec,
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ed448,
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ed25519,
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rsa,
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x448,
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x25519,
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)
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from cryptography.hazmat.primitives.asymmetric.types import (
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CERTIFICATE_ISSUER_PUBLIC_KEY_TYPES,
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CERTIFICATE_PRIVATE_KEY_TYPES,
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CERTIFICATE_PUBLIC_KEY_TYPES,
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)
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from cryptography.x509.extensions import (
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Extension,
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Extensions,
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ExtensionType,
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_make_sequence_methods,
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)
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from cryptography.x509.name import Name, _ASN1Type
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from cryptography.x509.oid import ObjectIdentifier
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_EARLIEST_UTC_TIME = datetime.datetime(1950, 1, 1)
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class AttributeNotFound(Exception):
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def __init__(self, msg: str, oid: ObjectIdentifier) -> None:
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super(AttributeNotFound, self).__init__(msg)
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self.oid = oid
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def _reject_duplicate_extension(
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extension: Extension[ExtensionType],
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extensions: typing.List[Extension[ExtensionType]],
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) -> None:
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# This is quadratic in the number of extensions
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for e in extensions:
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if e.oid == extension.oid:
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raise ValueError("This extension has already been set.")
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def _reject_duplicate_attribute(
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oid: ObjectIdentifier,
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attributes: typing.List[
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typing.Tuple[ObjectIdentifier, bytes, typing.Optional[int]]
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],
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) -> None:
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# This is quadratic in the number of attributes
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for attr_oid, _, _ in attributes:
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if attr_oid == oid:
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raise ValueError("This attribute has already been set.")
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def _convert_to_naive_utc_time(time: datetime.datetime) -> datetime.datetime:
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"""Normalizes a datetime to a naive datetime in UTC.
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time -- datetime to normalize. Assumed to be in UTC if not timezone
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aware.
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"""
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if time.tzinfo is not None:
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offset = time.utcoffset()
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offset = offset if offset else datetime.timedelta()
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return time.replace(tzinfo=None) - offset
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else:
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return time
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class Attribute:
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def __init__(
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self,
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oid: ObjectIdentifier,
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value: bytes,
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_type: int = _ASN1Type.UTF8String.value,
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) -> None:
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self._oid = oid
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self._value = value
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self._type = _type
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@property
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def oid(self) -> ObjectIdentifier:
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return self._oid
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@property
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def value(self) -> bytes:
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return self._value
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def __repr__(self) -> str:
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return "<Attribute(oid={}, value={!r})>".format(self.oid, self.value)
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def __eq__(self, other: object) -> bool:
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if not isinstance(other, Attribute):
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return NotImplemented
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return (
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self.oid == other.oid
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and self.value == other.value
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and self._type == other._type
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)
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def __hash__(self) -> int:
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return hash((self.oid, self.value, self._type))
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class Attributes:
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def __init__(
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self,
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attributes: typing.Iterable[Attribute],
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) -> None:
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self._attributes = list(attributes)
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__len__, __iter__, __getitem__ = _make_sequence_methods("_attributes")
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def __repr__(self) -> str:
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return "<Attributes({})>".format(self._attributes)
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def get_attribute_for_oid(self, oid: ObjectIdentifier) -> Attribute:
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for attr in self:
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if attr.oid == oid:
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return attr
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raise AttributeNotFound("No {} attribute was found".format(oid), oid)
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class Version(utils.Enum):
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v1 = 0
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v3 = 2
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class InvalidVersion(Exception):
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def __init__(self, msg: str, parsed_version: int) -> None:
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super(InvalidVersion, self).__init__(msg)
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self.parsed_version = parsed_version
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class Certificate(metaclass=abc.ABCMeta):
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@abc.abstractmethod
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def fingerprint(self, algorithm: hashes.HashAlgorithm) -> bytes:
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"""
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Returns bytes using digest passed.
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"""
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@property
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@abc.abstractmethod
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def serial_number(self) -> int:
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"""
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Returns certificate serial number
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"""
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@property
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@abc.abstractmethod
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def version(self) -> Version:
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"""
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Returns the certificate version
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"""
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@abc.abstractmethod
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def public_key(self) -> CERTIFICATE_PUBLIC_KEY_TYPES:
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"""
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Returns the public key
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"""
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@property
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@abc.abstractmethod
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def not_valid_before(self) -> datetime.datetime:
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"""
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Not before time (represented as UTC datetime)
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"""
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@property
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@abc.abstractmethod
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def not_valid_after(self) -> datetime.datetime:
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"""
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Not after time (represented as UTC datetime)
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"""
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@property
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@abc.abstractmethod
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def issuer(self) -> Name:
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"""
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Returns the issuer name object.
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"""
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@property
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@abc.abstractmethod
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def subject(self) -> Name:
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"""
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Returns the subject name object.
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"""
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@property
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@abc.abstractmethod
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def signature_hash_algorithm(
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self,
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) -> typing.Optional[hashes.HashAlgorithm]:
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"""
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Returns a HashAlgorithm corresponding to the type of the digest signed
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in the certificate.
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"""
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@property
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@abc.abstractmethod
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def signature_algorithm_oid(self) -> ObjectIdentifier:
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"""
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Returns the ObjectIdentifier of the signature algorithm.
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"""
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@property
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@abc.abstractmethod
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def extensions(self) -> Extensions:
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"""
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Returns an Extensions object.
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"""
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@property
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@abc.abstractmethod
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def signature(self) -> bytes:
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"""
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Returns the signature bytes.
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"""
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@property
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@abc.abstractmethod
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def tbs_certificate_bytes(self) -> bytes:
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"""
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Returns the tbsCertificate payload bytes as defined in RFC 5280.
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"""
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@property
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@abc.abstractmethod
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def tbs_precertificate_bytes(self) -> bytes:
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"""
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Returns the tbsCertificate payload bytes with the SCT list extension
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stripped.
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"""
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@abc.abstractmethod
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def __eq__(self, other: object) -> bool:
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"""
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Checks equality.
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"""
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@abc.abstractmethod
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def __hash__(self) -> int:
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"""
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Computes a hash.
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"""
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@abc.abstractmethod
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def public_bytes(self, encoding: serialization.Encoding) -> bytes:
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"""
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Serializes the certificate to PEM or DER format.
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"""
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# Runtime isinstance checks need this since the rust class is not a subclass.
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Certificate.register(rust_x509.Certificate)
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class RevokedCertificate(metaclass=abc.ABCMeta):
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@property
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@abc.abstractmethod
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def serial_number(self) -> int:
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"""
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Returns the serial number of the revoked certificate.
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"""
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@property
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@abc.abstractmethod
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def revocation_date(self) -> datetime.datetime:
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"""
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Returns the date of when this certificate was revoked.
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"""
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@property
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@abc.abstractmethod
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def extensions(self) -> Extensions:
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"""
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Returns an Extensions object containing a list of Revoked extensions.
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"""
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# Runtime isinstance checks need this since the rust class is not a subclass.
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RevokedCertificate.register(rust_x509.RevokedCertificate)
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class _RawRevokedCertificate(RevokedCertificate):
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def __init__(
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self,
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serial_number: int,
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revocation_date: datetime.datetime,
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extensions: Extensions,
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):
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self._serial_number = serial_number
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self._revocation_date = revocation_date
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self._extensions = extensions
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@property
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def serial_number(self) -> int:
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return self._serial_number
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@property
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def revocation_date(self) -> datetime.datetime:
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return self._revocation_date
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@property
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def extensions(self) -> Extensions:
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return self._extensions
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class CertificateRevocationList(metaclass=abc.ABCMeta):
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@abc.abstractmethod
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def public_bytes(self, encoding: serialization.Encoding) -> bytes:
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"""
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Serializes the CRL to PEM or DER format.
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"""
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@abc.abstractmethod
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def fingerprint(self, algorithm: hashes.HashAlgorithm) -> bytes:
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"""
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Returns bytes using digest passed.
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"""
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@abc.abstractmethod
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def get_revoked_certificate_by_serial_number(
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self, serial_number: int
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) -> typing.Optional[RevokedCertificate]:
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"""
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Returns an instance of RevokedCertificate or None if the serial_number
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is not in the CRL.
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"""
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@property
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@abc.abstractmethod
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def signature_hash_algorithm(
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self,
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) -> typing.Optional[hashes.HashAlgorithm]:
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"""
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Returns a HashAlgorithm corresponding to the type of the digest signed
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in the certificate.
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"""
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@property
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@abc.abstractmethod
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def signature_algorithm_oid(self) -> ObjectIdentifier:
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"""
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Returns the ObjectIdentifier of the signature algorithm.
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"""
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@property
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@abc.abstractmethod
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def issuer(self) -> Name:
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"""
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Returns the X509Name with the issuer of this CRL.
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"""
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@property
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@abc.abstractmethod
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def next_update(self) -> typing.Optional[datetime.datetime]:
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"""
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Returns the date of next update for this CRL.
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"""
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@property
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@abc.abstractmethod
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def last_update(self) -> datetime.datetime:
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"""
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Returns the date of last update for this CRL.
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"""
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@property
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@abc.abstractmethod
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def extensions(self) -> Extensions:
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"""
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Returns an Extensions object containing a list of CRL extensions.
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"""
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@property
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@abc.abstractmethod
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def signature(self) -> bytes:
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"""
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Returns the signature bytes.
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"""
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@property
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@abc.abstractmethod
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def tbs_certlist_bytes(self) -> bytes:
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"""
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Returns the tbsCertList payload bytes as defined in RFC 5280.
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"""
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@abc.abstractmethod
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def __eq__(self, other: object) -> bool:
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"""
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Checks equality.
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"""
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@abc.abstractmethod
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def __len__(self) -> int:
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"""
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Number of revoked certificates in the CRL.
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"""
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@typing.overload
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def __getitem__(self, idx: int) -> RevokedCertificate:
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...
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@typing.overload
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def __getitem__(self, idx: slice) -> typing.List[RevokedCertificate]:
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...
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@abc.abstractmethod
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def __getitem__(
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self, idx: typing.Union[int, slice]
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) -> typing.Union[RevokedCertificate, typing.List[RevokedCertificate]]:
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"""
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Returns a revoked certificate (or slice of revoked certificates).
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"""
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@abc.abstractmethod
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def __iter__(self) -> typing.Iterator[RevokedCertificate]:
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"""
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Iterator over the revoked certificates
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"""
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@abc.abstractmethod
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def is_signature_valid(
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self, public_key: CERTIFICATE_ISSUER_PUBLIC_KEY_TYPES
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) -> bool:
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"""
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Verifies signature of revocation list against given public key.
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"""
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CertificateRevocationList.register(rust_x509.CertificateRevocationList)
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class CertificateSigningRequest(metaclass=abc.ABCMeta):
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@abc.abstractmethod
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def __eq__(self, other: object) -> bool:
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"""
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Checks equality.
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"""
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@abc.abstractmethod
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def __hash__(self) -> int:
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"""
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Computes a hash.
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"""
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@abc.abstractmethod
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def public_key(self) -> CERTIFICATE_PUBLIC_KEY_TYPES:
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"""
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Returns the public key
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"""
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@property
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@abc.abstractmethod
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def subject(self) -> Name:
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"""
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Returns the subject name object.
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"""
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@property
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@abc.abstractmethod
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def signature_hash_algorithm(
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self,
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) -> typing.Optional[hashes.HashAlgorithm]:
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"""
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Returns a HashAlgorithm corresponding to the type of the digest signed
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in the certificate.
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"""
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@property
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@abc.abstractmethod
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def signature_algorithm_oid(self) -> ObjectIdentifier:
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"""
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Returns the ObjectIdentifier of the signature algorithm.
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"""
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@property
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@abc.abstractmethod
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def extensions(self) -> Extensions:
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"""
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Returns the extensions in the signing request.
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"""
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@property
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@abc.abstractmethod
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def attributes(self) -> Attributes:
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"""
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Returns an Attributes object.
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"""
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@abc.abstractmethod
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def public_bytes(self, encoding: serialization.Encoding) -> bytes:
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"""
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Encodes the request to PEM or DER format.
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"""
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@property
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@abc.abstractmethod
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def signature(self) -> bytes:
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"""
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Returns the signature bytes.
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"""
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@property
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@abc.abstractmethod
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def tbs_certrequest_bytes(self) -> bytes:
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"""
|
|
Returns the PKCS#10 CertificationRequestInfo bytes as defined in RFC
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2986.
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"""
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@property
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@abc.abstractmethod
|
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def is_signature_valid(self) -> bool:
|
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"""
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Verifies signature of signing request.
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"""
|
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@abc.abstractmethod
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def get_attribute_for_oid(self, oid: ObjectIdentifier) -> bytes:
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"""
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Get the attribute value for a given OID.
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"""
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# Runtime isinstance checks need this since the rust class is not a subclass.
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CertificateSigningRequest.register(rust_x509.CertificateSigningRequest)
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|
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# Backend argument preserved for API compatibility, but ignored.
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def load_pem_x509_certificate(
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data: bytes, backend: typing.Any = None
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) -> Certificate:
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return rust_x509.load_pem_x509_certificate(data)
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|
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def load_pem_x509_certificates(data: bytes) -> typing.List[Certificate]:
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return rust_x509.load_pem_x509_certificates(data)
|
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|
|
|
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# Backend argument preserved for API compatibility, but ignored.
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def load_der_x509_certificate(
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data: bytes, backend: typing.Any = None
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) -> Certificate:
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return rust_x509.load_der_x509_certificate(data)
|
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|
|
|
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# Backend argument preserved for API compatibility, but ignored.
|
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def load_pem_x509_csr(
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data: bytes, backend: typing.Any = None
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) -> CertificateSigningRequest:
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return rust_x509.load_pem_x509_csr(data)
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|
|
|
|
# Backend argument preserved for API compatibility, but ignored.
|
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def load_der_x509_csr(
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data: bytes, backend: typing.Any = None
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) -> CertificateSigningRequest:
|
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return rust_x509.load_der_x509_csr(data)
|
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|
|
|
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# Backend argument preserved for API compatibility, but ignored.
|
|
def load_pem_x509_crl(
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data: bytes, backend: typing.Any = None
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) -> CertificateRevocationList:
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return rust_x509.load_pem_x509_crl(data)
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|
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# Backend argument preserved for API compatibility, but ignored.
|
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def load_der_x509_crl(
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data: bytes, backend: typing.Any = None
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) -> CertificateRevocationList:
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return rust_x509.load_der_x509_crl(data)
|
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|
|
|
|
class CertificateSigningRequestBuilder:
|
|
def __init__(
|
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self,
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subject_name: typing.Optional[Name] = None,
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extensions: typing.List[Extension[ExtensionType]] = [],
|
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attributes: typing.List[
|
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typing.Tuple[ObjectIdentifier, bytes, typing.Optional[int]]
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] = [],
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):
|
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"""
|
|
Creates an empty X.509 certificate request (v1).
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"""
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self._subject_name = subject_name
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self._extensions = extensions
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self._attributes = attributes
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|
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def subject_name(self, name: Name) -> "CertificateSigningRequestBuilder":
|
|
"""
|
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Sets the certificate requestor's distinguished name.
|
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"""
|
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if not isinstance(name, Name):
|
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raise TypeError("Expecting x509.Name object.")
|
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if self._subject_name is not None:
|
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raise ValueError("The subject name may only be set once.")
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return CertificateSigningRequestBuilder(
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name, self._extensions, self._attributes
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)
|
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|
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def add_extension(
|
|
self, extval: ExtensionType, critical: bool
|
|
) -> "CertificateSigningRequestBuilder":
|
|
"""
|
|
Adds an X.509 extension to the certificate request.
|
|
"""
|
|
if not isinstance(extval, ExtensionType):
|
|
raise TypeError("extension must be an ExtensionType")
|
|
|
|
extension = Extension(extval.oid, critical, extval)
|
|
_reject_duplicate_extension(extension, self._extensions)
|
|
|
|
return CertificateSigningRequestBuilder(
|
|
self._subject_name,
|
|
self._extensions + [extension],
|
|
self._attributes,
|
|
)
|
|
|
|
def add_attribute(
|
|
self,
|
|
oid: ObjectIdentifier,
|
|
value: bytes,
|
|
*,
|
|
_tag: typing.Optional[_ASN1Type] = None,
|
|
) -> "CertificateSigningRequestBuilder":
|
|
"""
|
|
Adds an X.509 attribute with an OID and associated value.
|
|
"""
|
|
if not isinstance(oid, ObjectIdentifier):
|
|
raise TypeError("oid must be an ObjectIdentifier")
|
|
|
|
if not isinstance(value, bytes):
|
|
raise TypeError("value must be bytes")
|
|
|
|
if _tag is not None and not isinstance(_tag, _ASN1Type):
|
|
raise TypeError("tag must be _ASN1Type")
|
|
|
|
_reject_duplicate_attribute(oid, self._attributes)
|
|
|
|
if _tag is not None:
|
|
tag = _tag.value
|
|
else:
|
|
tag = None
|
|
|
|
return CertificateSigningRequestBuilder(
|
|
self._subject_name,
|
|
self._extensions,
|
|
self._attributes + [(oid, value, tag)],
|
|
)
|
|
|
|
def sign(
|
|
self,
|
|
private_key: CERTIFICATE_PRIVATE_KEY_TYPES,
|
|
algorithm: typing.Optional[hashes.HashAlgorithm],
|
|
backend: typing.Any = None,
|
|
) -> CertificateSigningRequest:
|
|
"""
|
|
Signs the request using the requestor's private key.
|
|
"""
|
|
if self._subject_name is None:
|
|
raise ValueError("A CertificateSigningRequest must have a subject")
|
|
return rust_x509.create_x509_csr(self, private_key, algorithm)
|
|
|
|
|
|
class CertificateBuilder:
|
|
_extensions: typing.List[Extension[ExtensionType]]
|
|
|
|
def __init__(
|
|
self,
|
|
issuer_name: typing.Optional[Name] = None,
|
|
subject_name: typing.Optional[Name] = None,
|
|
public_key: typing.Optional[CERTIFICATE_PUBLIC_KEY_TYPES] = None,
|
|
serial_number: typing.Optional[int] = None,
|
|
not_valid_before: typing.Optional[datetime.datetime] = None,
|
|
not_valid_after: typing.Optional[datetime.datetime] = None,
|
|
extensions: typing.List[Extension[ExtensionType]] = [],
|
|
) -> None:
|
|
self._version = Version.v3
|
|
self._issuer_name = issuer_name
|
|
self._subject_name = subject_name
|
|
self._public_key = public_key
|
|
self._serial_number = serial_number
|
|
self._not_valid_before = not_valid_before
|
|
self._not_valid_after = not_valid_after
|
|
self._extensions = extensions
|
|
|
|
def issuer_name(self, name: Name) -> "CertificateBuilder":
|
|
"""
|
|
Sets the CA's distinguished name.
|
|
"""
|
|
if not isinstance(name, Name):
|
|
raise TypeError("Expecting x509.Name object.")
|
|
if self._issuer_name is not None:
|
|
raise ValueError("The issuer name may only be set once.")
|
|
return CertificateBuilder(
|
|
name,
|
|
self._subject_name,
|
|
self._public_key,
|
|
self._serial_number,
|
|
self._not_valid_before,
|
|
self._not_valid_after,
|
|
self._extensions,
|
|
)
|
|
|
|
def subject_name(self, name: Name) -> "CertificateBuilder":
|
|
"""
|
|
Sets the requestor's distinguished name.
|
|
"""
|
|
if not isinstance(name, Name):
|
|
raise TypeError("Expecting x509.Name object.")
|
|
if self._subject_name is not None:
|
|
raise ValueError("The subject name may only be set once.")
|
|
return CertificateBuilder(
|
|
self._issuer_name,
|
|
name,
|
|
self._public_key,
|
|
self._serial_number,
|
|
self._not_valid_before,
|
|
self._not_valid_after,
|
|
self._extensions,
|
|
)
|
|
|
|
def public_key(
|
|
self,
|
|
key: CERTIFICATE_PUBLIC_KEY_TYPES,
|
|
) -> "CertificateBuilder":
|
|
"""
|
|
Sets the requestor's public key (as found in the signing request).
|
|
"""
|
|
if not isinstance(
|
|
key,
|
|
(
|
|
dsa.DSAPublicKey,
|
|
rsa.RSAPublicKey,
|
|
ec.EllipticCurvePublicKey,
|
|
ed25519.Ed25519PublicKey,
|
|
ed448.Ed448PublicKey,
|
|
x25519.X25519PublicKey,
|
|
x448.X448PublicKey,
|
|
),
|
|
):
|
|
raise TypeError(
|
|
"Expecting one of DSAPublicKey, RSAPublicKey,"
|
|
" EllipticCurvePublicKey, Ed25519PublicKey,"
|
|
" Ed448PublicKey, X25519PublicKey, or "
|
|
"X448PublicKey."
|
|
)
|
|
if self._public_key is not None:
|
|
raise ValueError("The public key may only be set once.")
|
|
return CertificateBuilder(
|
|
self._issuer_name,
|
|
self._subject_name,
|
|
key,
|
|
self._serial_number,
|
|
self._not_valid_before,
|
|
self._not_valid_after,
|
|
self._extensions,
|
|
)
|
|
|
|
def serial_number(self, number: int) -> "CertificateBuilder":
|
|
"""
|
|
Sets the certificate serial number.
|
|
"""
|
|
if not isinstance(number, int):
|
|
raise TypeError("Serial number must be of integral type.")
|
|
if self._serial_number is not None:
|
|
raise ValueError("The serial number may only be set once.")
|
|
if number <= 0:
|
|
raise ValueError("The serial number should be positive.")
|
|
|
|
# ASN.1 integers are always signed, so most significant bit must be
|
|
# zero.
|
|
if number.bit_length() >= 160: # As defined in RFC 5280
|
|
raise ValueError(
|
|
"The serial number should not be more than 159 " "bits."
|
|
)
|
|
return CertificateBuilder(
|
|
self._issuer_name,
|
|
self._subject_name,
|
|
self._public_key,
|
|
number,
|
|
self._not_valid_before,
|
|
self._not_valid_after,
|
|
self._extensions,
|
|
)
|
|
|
|
def not_valid_before(
|
|
self, time: datetime.datetime
|
|
) -> "CertificateBuilder":
|
|
"""
|
|
Sets the certificate activation time.
|
|
"""
|
|
if not isinstance(time, datetime.datetime):
|
|
raise TypeError("Expecting datetime object.")
|
|
if self._not_valid_before is not None:
|
|
raise ValueError("The not valid before may only be set once.")
|
|
time = _convert_to_naive_utc_time(time)
|
|
if time < _EARLIEST_UTC_TIME:
|
|
raise ValueError(
|
|
"The not valid before date must be on or after"
|
|
" 1950 January 1)."
|
|
)
|
|
if self._not_valid_after is not None and time > self._not_valid_after:
|
|
raise ValueError(
|
|
"The not valid before date must be before the not valid after "
|
|
"date."
|
|
)
|
|
return CertificateBuilder(
|
|
self._issuer_name,
|
|
self._subject_name,
|
|
self._public_key,
|
|
self._serial_number,
|
|
time,
|
|
self._not_valid_after,
|
|
self._extensions,
|
|
)
|
|
|
|
def not_valid_after(self, time: datetime.datetime) -> "CertificateBuilder":
|
|
"""
|
|
Sets the certificate expiration time.
|
|
"""
|
|
if not isinstance(time, datetime.datetime):
|
|
raise TypeError("Expecting datetime object.")
|
|
if self._not_valid_after is not None:
|
|
raise ValueError("The not valid after may only be set once.")
|
|
time = _convert_to_naive_utc_time(time)
|
|
if time < _EARLIEST_UTC_TIME:
|
|
raise ValueError(
|
|
"The not valid after date must be on or after"
|
|
" 1950 January 1."
|
|
)
|
|
if (
|
|
self._not_valid_before is not None
|
|
and time < self._not_valid_before
|
|
):
|
|
raise ValueError(
|
|
"The not valid after date must be after the not valid before "
|
|
"date."
|
|
)
|
|
return CertificateBuilder(
|
|
self._issuer_name,
|
|
self._subject_name,
|
|
self._public_key,
|
|
self._serial_number,
|
|
self._not_valid_before,
|
|
time,
|
|
self._extensions,
|
|
)
|
|
|
|
def add_extension(
|
|
self, extval: ExtensionType, critical: bool
|
|
) -> "CertificateBuilder":
|
|
"""
|
|
Adds an X.509 extension to the certificate.
|
|
"""
|
|
if not isinstance(extval, ExtensionType):
|
|
raise TypeError("extension must be an ExtensionType")
|
|
|
|
extension = Extension(extval.oid, critical, extval)
|
|
_reject_duplicate_extension(extension, self._extensions)
|
|
|
|
return CertificateBuilder(
|
|
self._issuer_name,
|
|
self._subject_name,
|
|
self._public_key,
|
|
self._serial_number,
|
|
self._not_valid_before,
|
|
self._not_valid_after,
|
|
self._extensions + [extension],
|
|
)
|
|
|
|
def sign(
|
|
self,
|
|
private_key: CERTIFICATE_PRIVATE_KEY_TYPES,
|
|
algorithm: typing.Optional[hashes.HashAlgorithm],
|
|
backend: typing.Any = None,
|
|
) -> Certificate:
|
|
"""
|
|
Signs the certificate using the CA's private key.
|
|
"""
|
|
if self._subject_name is None:
|
|
raise ValueError("A certificate must have a subject name")
|
|
|
|
if self._issuer_name is None:
|
|
raise ValueError("A certificate must have an issuer name")
|
|
|
|
if self._serial_number is None:
|
|
raise ValueError("A certificate must have a serial number")
|
|
|
|
if self._not_valid_before is None:
|
|
raise ValueError("A certificate must have a not valid before time")
|
|
|
|
if self._not_valid_after is None:
|
|
raise ValueError("A certificate must have a not valid after time")
|
|
|
|
if self._public_key is None:
|
|
raise ValueError("A certificate must have a public key")
|
|
|
|
return rust_x509.create_x509_certificate(self, private_key, algorithm)
|
|
|
|
|
|
class CertificateRevocationListBuilder:
|
|
_extensions: typing.List[Extension[ExtensionType]]
|
|
_revoked_certificates: typing.List[RevokedCertificate]
|
|
|
|
def __init__(
|
|
self,
|
|
issuer_name: typing.Optional[Name] = None,
|
|
last_update: typing.Optional[datetime.datetime] = None,
|
|
next_update: typing.Optional[datetime.datetime] = None,
|
|
extensions: typing.List[Extension[ExtensionType]] = [],
|
|
revoked_certificates: typing.List[RevokedCertificate] = [],
|
|
):
|
|
self._issuer_name = issuer_name
|
|
self._last_update = last_update
|
|
self._next_update = next_update
|
|
self._extensions = extensions
|
|
self._revoked_certificates = revoked_certificates
|
|
|
|
def issuer_name(
|
|
self, issuer_name: Name
|
|
) -> "CertificateRevocationListBuilder":
|
|
if not isinstance(issuer_name, Name):
|
|
raise TypeError("Expecting x509.Name object.")
|
|
if self._issuer_name is not None:
|
|
raise ValueError("The issuer name may only be set once.")
|
|
return CertificateRevocationListBuilder(
|
|
issuer_name,
|
|
self._last_update,
|
|
self._next_update,
|
|
self._extensions,
|
|
self._revoked_certificates,
|
|
)
|
|
|
|
def last_update(
|
|
self, last_update: datetime.datetime
|
|
) -> "CertificateRevocationListBuilder":
|
|
if not isinstance(last_update, datetime.datetime):
|
|
raise TypeError("Expecting datetime object.")
|
|
if self._last_update is not None:
|
|
raise ValueError("Last update may only be set once.")
|
|
last_update = _convert_to_naive_utc_time(last_update)
|
|
if last_update < _EARLIEST_UTC_TIME:
|
|
raise ValueError(
|
|
"The last update date must be on or after" " 1950 January 1."
|
|
)
|
|
if self._next_update is not None and last_update > self._next_update:
|
|
raise ValueError(
|
|
"The last update date must be before the next update date."
|
|
)
|
|
return CertificateRevocationListBuilder(
|
|
self._issuer_name,
|
|
last_update,
|
|
self._next_update,
|
|
self._extensions,
|
|
self._revoked_certificates,
|
|
)
|
|
|
|
def next_update(
|
|
self, next_update: datetime.datetime
|
|
) -> "CertificateRevocationListBuilder":
|
|
if not isinstance(next_update, datetime.datetime):
|
|
raise TypeError("Expecting datetime object.")
|
|
if self._next_update is not None:
|
|
raise ValueError("Last update may only be set once.")
|
|
next_update = _convert_to_naive_utc_time(next_update)
|
|
if next_update < _EARLIEST_UTC_TIME:
|
|
raise ValueError(
|
|
"The last update date must be on or after" " 1950 January 1."
|
|
)
|
|
if self._last_update is not None and next_update < self._last_update:
|
|
raise ValueError(
|
|
"The next update date must be after the last update date."
|
|
)
|
|
return CertificateRevocationListBuilder(
|
|
self._issuer_name,
|
|
self._last_update,
|
|
next_update,
|
|
self._extensions,
|
|
self._revoked_certificates,
|
|
)
|
|
|
|
def add_extension(
|
|
self, extval: ExtensionType, critical: bool
|
|
) -> "CertificateRevocationListBuilder":
|
|
"""
|
|
Adds an X.509 extension to the certificate revocation list.
|
|
"""
|
|
if not isinstance(extval, ExtensionType):
|
|
raise TypeError("extension must be an ExtensionType")
|
|
|
|
extension = Extension(extval.oid, critical, extval)
|
|
_reject_duplicate_extension(extension, self._extensions)
|
|
return CertificateRevocationListBuilder(
|
|
self._issuer_name,
|
|
self._last_update,
|
|
self._next_update,
|
|
self._extensions + [extension],
|
|
self._revoked_certificates,
|
|
)
|
|
|
|
def add_revoked_certificate(
|
|
self, revoked_certificate: RevokedCertificate
|
|
) -> "CertificateRevocationListBuilder":
|
|
"""
|
|
Adds a revoked certificate to the CRL.
|
|
"""
|
|
if not isinstance(revoked_certificate, RevokedCertificate):
|
|
raise TypeError("Must be an instance of RevokedCertificate")
|
|
|
|
return CertificateRevocationListBuilder(
|
|
self._issuer_name,
|
|
self._last_update,
|
|
self._next_update,
|
|
self._extensions,
|
|
self._revoked_certificates + [revoked_certificate],
|
|
)
|
|
|
|
def sign(
|
|
self,
|
|
private_key: CERTIFICATE_PRIVATE_KEY_TYPES,
|
|
algorithm: typing.Optional[hashes.HashAlgorithm],
|
|
backend: typing.Any = None,
|
|
) -> CertificateRevocationList:
|
|
if self._issuer_name is None:
|
|
raise ValueError("A CRL must have an issuer name")
|
|
|
|
if self._last_update is None:
|
|
raise ValueError("A CRL must have a last update time")
|
|
|
|
if self._next_update is None:
|
|
raise ValueError("A CRL must have a next update time")
|
|
|
|
return rust_x509.create_x509_crl(self, private_key, algorithm)
|
|
|
|
|
|
class RevokedCertificateBuilder:
|
|
def __init__(
|
|
self,
|
|
serial_number: typing.Optional[int] = None,
|
|
revocation_date: typing.Optional[datetime.datetime] = None,
|
|
extensions: typing.List[Extension[ExtensionType]] = [],
|
|
):
|
|
self._serial_number = serial_number
|
|
self._revocation_date = revocation_date
|
|
self._extensions = extensions
|
|
|
|
def serial_number(self, number: int) -> "RevokedCertificateBuilder":
|
|
if not isinstance(number, int):
|
|
raise TypeError("Serial number must be of integral type.")
|
|
if self._serial_number is not None:
|
|
raise ValueError("The serial number may only be set once.")
|
|
if number <= 0:
|
|
raise ValueError("The serial number should be positive")
|
|
|
|
# ASN.1 integers are always signed, so most significant bit must be
|
|
# zero.
|
|
if number.bit_length() >= 160: # As defined in RFC 5280
|
|
raise ValueError(
|
|
"The serial number should not be more than 159 " "bits."
|
|
)
|
|
return RevokedCertificateBuilder(
|
|
number, self._revocation_date, self._extensions
|
|
)
|
|
|
|
def revocation_date(
|
|
self, time: datetime.datetime
|
|
) -> "RevokedCertificateBuilder":
|
|
if not isinstance(time, datetime.datetime):
|
|
raise TypeError("Expecting datetime object.")
|
|
if self._revocation_date is not None:
|
|
raise ValueError("The revocation date may only be set once.")
|
|
time = _convert_to_naive_utc_time(time)
|
|
if time < _EARLIEST_UTC_TIME:
|
|
raise ValueError(
|
|
"The revocation date must be on or after" " 1950 January 1."
|
|
)
|
|
return RevokedCertificateBuilder(
|
|
self._serial_number, time, self._extensions
|
|
)
|
|
|
|
def add_extension(
|
|
self, extval: ExtensionType, critical: bool
|
|
) -> "RevokedCertificateBuilder":
|
|
if not isinstance(extval, ExtensionType):
|
|
raise TypeError("extension must be an ExtensionType")
|
|
|
|
extension = Extension(extval.oid, critical, extval)
|
|
_reject_duplicate_extension(extension, self._extensions)
|
|
return RevokedCertificateBuilder(
|
|
self._serial_number,
|
|
self._revocation_date,
|
|
self._extensions + [extension],
|
|
)
|
|
|
|
def build(self, backend: typing.Any = None) -> RevokedCertificate:
|
|
if self._serial_number is None:
|
|
raise ValueError("A revoked certificate must have a serial number")
|
|
if self._revocation_date is None:
|
|
raise ValueError(
|
|
"A revoked certificate must have a revocation date"
|
|
)
|
|
return _RawRevokedCertificate(
|
|
self._serial_number,
|
|
self._revocation_date,
|
|
Extensions(self._extensions),
|
|
)
|
|
|
|
|
|
def random_serial_number() -> int:
|
|
return int.from_bytes(os.urandom(20), "big") >> 1
|