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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 datetime
import hashlib
import ipaddress
from enum import Enum
import six
from cryptography import utils
from cryptography.hazmat._der import (
BIT_STRING,
DERReader,
OBJECT_IDENTIFIER,
SEQUENCE,
)
from cryptography.hazmat.primitives import constant_time, serialization
from cryptography.hazmat.primitives.asymmetric.ec import EllipticCurvePublicKey
from cryptography.hazmat.primitives.asymmetric.rsa import RSAPublicKey
from cryptography.x509.certificate_transparency import (
SignedCertificateTimestamp,
)
from cryptography.x509.general_name import GeneralName, IPAddress, OtherName
from cryptography.x509.name import RelativeDistinguishedName
from cryptography.x509.oid import (
CRLEntryExtensionOID,
ExtensionOID,
OCSPExtensionOID,
ObjectIdentifier,
)
def _key_identifier_from_public_key(public_key):
if isinstance(public_key, RSAPublicKey):
data = public_key.public_bytes(
serialization.Encoding.DER,
serialization.PublicFormat.PKCS1,
)
elif isinstance(public_key, EllipticCurvePublicKey):
data = public_key.public_bytes(
serialization.Encoding.X962,
serialization.PublicFormat.UncompressedPoint,
)
else:
# This is a very slow way to do this.
serialized = public_key.public_bytes(
serialization.Encoding.DER,
serialization.PublicFormat.SubjectPublicKeyInfo,
)
reader = DERReader(serialized)
with reader.read_single_element(SEQUENCE) as public_key_info:
algorithm = public_key_info.read_element(SEQUENCE)
public_key = public_key_info.read_element(BIT_STRING)
# Double-check the algorithm structure.
with algorithm:
algorithm.read_element(OBJECT_IDENTIFIER)
if not algorithm.is_empty():
# Skip the optional parameters field.
algorithm.read_any_element()
# BIT STRING contents begin with the number of padding bytes added. It
# must be zero for SubjectPublicKeyInfo structures.
if public_key.read_byte() != 0:
raise ValueError("Invalid public key encoding")
data = public_key.data
return hashlib.sha1(data).digest()
def _make_sequence_methods(field_name):
def len_method(self):
return len(getattr(self, field_name))
def iter_method(self):
return iter(getattr(self, field_name))
def getitem_method(self, idx):
return getattr(self, field_name)[idx]
return len_method, iter_method, getitem_method
class DuplicateExtension(Exception):
def __init__(self, msg, oid):
super(DuplicateExtension, self).__init__(msg)
self.oid = oid
class ExtensionNotFound(Exception):
def __init__(self, msg, oid):
super(ExtensionNotFound, self).__init__(msg)
self.oid = oid
@six.add_metaclass(abc.ABCMeta)
class ExtensionType(object):
@abc.abstractproperty
def oid(self):
"""
Returns the oid associated with the given extension type.
"""
class Extensions(object):
def __init__(self, extensions):
self._extensions = extensions
def get_extension_for_oid(self, oid):
for ext in self:
if ext.oid == oid:
return ext
raise ExtensionNotFound("No {} extension was found".format(oid), oid)
def get_extension_for_class(self, extclass):
if extclass is UnrecognizedExtension:
raise TypeError(
"UnrecognizedExtension can't be used with "
"get_extension_for_class because more than one instance of the"
" class may be present."
)
for ext in self:
if isinstance(ext.value, extclass):
return ext
raise ExtensionNotFound(
"No {} extension was found".format(extclass), extclass.oid
)
__len__, __iter__, __getitem__ = _make_sequence_methods("_extensions")
def __repr__(self):
return "<Extensions({})>".format(self._extensions)
@utils.register_interface(ExtensionType)
class CRLNumber(object):
oid = ExtensionOID.CRL_NUMBER
def __init__(self, crl_number):
if not isinstance(crl_number, six.integer_types):
raise TypeError("crl_number must be an integer")
self._crl_number = crl_number
def __eq__(self, other):
if not isinstance(other, CRLNumber):
return NotImplemented
return self.crl_number == other.crl_number
def __ne__(self, other):
return not self == other
def __hash__(self):
return hash(self.crl_number)
def __repr__(self):
return "<CRLNumber({})>".format(self.crl_number)
crl_number = utils.read_only_property("_crl_number")
@utils.register_interface(ExtensionType)
class AuthorityKeyIdentifier(object):
oid = ExtensionOID.AUTHORITY_KEY_IDENTIFIER
def __init__(
self,
key_identifier,
authority_cert_issuer,
authority_cert_serial_number,
):
if (authority_cert_issuer is None) != (
authority_cert_serial_number is None
):
raise ValueError(
"authority_cert_issuer and authority_cert_serial_number "
"must both be present or both None"
)
if authority_cert_issuer is not None:
authority_cert_issuer = list(authority_cert_issuer)
if not all(
isinstance(x, GeneralName) for x in authority_cert_issuer
):
raise TypeError(
"authority_cert_issuer must be a list of GeneralName "
"objects"
)
if authority_cert_serial_number is not None and not isinstance(
authority_cert_serial_number, six.integer_types
):
raise TypeError("authority_cert_serial_number must be an integer")
self._key_identifier = key_identifier
self._authority_cert_issuer = authority_cert_issuer
self._authority_cert_serial_number = authority_cert_serial_number
@classmethod
def from_issuer_public_key(cls, public_key):
digest = _key_identifier_from_public_key(public_key)
return cls(
key_identifier=digest,
authority_cert_issuer=None,
authority_cert_serial_number=None,
)
@classmethod
def from_issuer_subject_key_identifier(cls, ski):
if isinstance(ski, SubjectKeyIdentifier):
digest = ski.digest
else:
digest = ski.value.digest
return cls(
key_identifier=digest,
authority_cert_issuer=None,
authority_cert_serial_number=None,
)
def __repr__(self):
return (
"<AuthorityKeyIdentifier(key_identifier={0.key_identifier!r}, "
"authority_cert_issuer={0.authority_cert_issuer}, "
"authority_cert_serial_number={0.authority_cert_serial_number}"
")>".format(self)
)
def __eq__(self, other):
if not isinstance(other, AuthorityKeyIdentifier):
return NotImplemented
return (
self.key_identifier == other.key_identifier
and self.authority_cert_issuer == other.authority_cert_issuer
and self.authority_cert_serial_number
== other.authority_cert_serial_number
)
def __ne__(self, other):
return not self == other
def __hash__(self):
if self.authority_cert_issuer is None:
aci = None
else:
aci = tuple(self.authority_cert_issuer)
return hash(
(self.key_identifier, aci, self.authority_cert_serial_number)
)
key_identifier = utils.read_only_property("_key_identifier")
authority_cert_issuer = utils.read_only_property("_authority_cert_issuer")
authority_cert_serial_number = utils.read_only_property(
"_authority_cert_serial_number"
)
@utils.register_interface(ExtensionType)
class SubjectKeyIdentifier(object):
oid = ExtensionOID.SUBJECT_KEY_IDENTIFIER
def __init__(self, digest):
self._digest = digest
@classmethod
def from_public_key(cls, public_key):
return cls(_key_identifier_from_public_key(public_key))
digest = utils.read_only_property("_digest")
def __repr__(self):
return "<SubjectKeyIdentifier(digest={0!r})>".format(self.digest)
def __eq__(self, other):
if not isinstance(other, SubjectKeyIdentifier):
return NotImplemented
return constant_time.bytes_eq(self.digest, other.digest)
def __ne__(self, other):
return not self == other
def __hash__(self):
return hash(self.digest)
@utils.register_interface(ExtensionType)
class AuthorityInformationAccess(object):
oid = ExtensionOID.AUTHORITY_INFORMATION_ACCESS
def __init__(self, descriptions):
descriptions = list(descriptions)
if not all(isinstance(x, AccessDescription) for x in descriptions):
raise TypeError(
"Every item in the descriptions list must be an "
"AccessDescription"
)
self._descriptions = descriptions
__len__, __iter__, __getitem__ = _make_sequence_methods("_descriptions")
def __repr__(self):
return "<AuthorityInformationAccess({})>".format(self._descriptions)
def __eq__(self, other):
if not isinstance(other, AuthorityInformationAccess):
return NotImplemented
return self._descriptions == other._descriptions
def __ne__(self, other):
return not self == other
def __hash__(self):
return hash(tuple(self._descriptions))
@utils.register_interface(ExtensionType)
class SubjectInformationAccess(object):
oid = ExtensionOID.SUBJECT_INFORMATION_ACCESS
def __init__(self, descriptions):
descriptions = list(descriptions)
if not all(isinstance(x, AccessDescription) for x in descriptions):
raise TypeError(
"Every item in the descriptions list must be an "
"AccessDescription"
)
self._descriptions = descriptions
__len__, __iter__, __getitem__ = _make_sequence_methods("_descriptions")
def __repr__(self):
return "<SubjectInformationAccess({})>".format(self._descriptions)
def __eq__(self, other):
if not isinstance(other, SubjectInformationAccess):
return NotImplemented
return self._descriptions == other._descriptions
def __ne__(self, other):
return not self == other
def __hash__(self):
return hash(tuple(self._descriptions))
class AccessDescription(object):
def __init__(self, access_method, access_location):
if not isinstance(access_method, ObjectIdentifier):
raise TypeError("access_method must be an ObjectIdentifier")
if not isinstance(access_location, GeneralName):
raise TypeError("access_location must be a GeneralName")
self._access_method = access_method
self._access_location = access_location
def __repr__(self):
return (
"<AccessDescription(access_method={0.access_method}, access_locati"
"on={0.access_location})>".format(self)
)
def __eq__(self, other):
if not isinstance(other, AccessDescription):
return NotImplemented
return (
self.access_method == other.access_method
and self.access_location == other.access_location
)
def __ne__(self, other):
return not self == other
def __hash__(self):
return hash((self.access_method, self.access_location))
access_method = utils.read_only_property("_access_method")
access_location = utils.read_only_property("_access_location")
@utils.register_interface(ExtensionType)
class BasicConstraints(object):
oid = ExtensionOID.BASIC_CONSTRAINTS
def __init__(self, ca, path_length):
if not isinstance(ca, bool):
raise TypeError("ca must be a boolean value")
if path_length is not None and not ca:
raise ValueError("path_length must be None when ca is False")
if path_length is not None and (
not isinstance(path_length, six.integer_types) or path_length < 0
):
raise TypeError(
"path_length must be a non-negative integer or None"
)
self._ca = ca
self._path_length = path_length
ca = utils.read_only_property("_ca")
path_length = utils.read_only_property("_path_length")
def __repr__(self):
return (
"<BasicConstraints(ca={0.ca}, " "path_length={0.path_length})>"
).format(self)
def __eq__(self, other):
if not isinstance(other, BasicConstraints):
return NotImplemented
return self.ca == other.ca and self.path_length == other.path_length
def __ne__(self, other):
return not self == other
def __hash__(self):
return hash((self.ca, self.path_length))
@utils.register_interface(ExtensionType)
class DeltaCRLIndicator(object):
oid = ExtensionOID.DELTA_CRL_INDICATOR
def __init__(self, crl_number):
if not isinstance(crl_number, six.integer_types):
raise TypeError("crl_number must be an integer")
self._crl_number = crl_number
crl_number = utils.read_only_property("_crl_number")
def __eq__(self, other):
if not isinstance(other, DeltaCRLIndicator):
return NotImplemented
return self.crl_number == other.crl_number
def __ne__(self, other):
return not self == other
def __hash__(self):
return hash(self.crl_number)
def __repr__(self):
return "<DeltaCRLIndicator(crl_number={0.crl_number})>".format(self)
@utils.register_interface(ExtensionType)
class CRLDistributionPoints(object):
oid = ExtensionOID.CRL_DISTRIBUTION_POINTS
def __init__(self, distribution_points):
distribution_points = list(distribution_points)
if not all(
isinstance(x, DistributionPoint) for x in distribution_points
):
raise TypeError(
"distribution_points must be a list of DistributionPoint "
"objects"
)
self._distribution_points = distribution_points
__len__, __iter__, __getitem__ = _make_sequence_methods(
"_distribution_points"
)
def __repr__(self):
return "<CRLDistributionPoints({})>".format(self._distribution_points)
def __eq__(self, other):
if not isinstance(other, CRLDistributionPoints):
return NotImplemented
return self._distribution_points == other._distribution_points
def __ne__(self, other):
return not self == other
def __hash__(self):
return hash(tuple(self._distribution_points))
@utils.register_interface(ExtensionType)
class FreshestCRL(object):
oid = ExtensionOID.FRESHEST_CRL
def __init__(self, distribution_points):
distribution_points = list(distribution_points)
if not all(
isinstance(x, DistributionPoint) for x in distribution_points
):
raise TypeError(
"distribution_points must be a list of DistributionPoint "
"objects"
)
self._distribution_points = distribution_points
__len__, __iter__, __getitem__ = _make_sequence_methods(
"_distribution_points"
)
def __repr__(self):
return "<FreshestCRL({})>".format(self._distribution_points)
def __eq__(self, other):
if not isinstance(other, FreshestCRL):
return NotImplemented
return self._distribution_points == other._distribution_points
def __ne__(self, other):
return not self == other
def __hash__(self):
return hash(tuple(self._distribution_points))
class DistributionPoint(object):
def __init__(self, full_name, relative_name, reasons, crl_issuer):
if full_name and relative_name:
raise ValueError(
"You cannot provide both full_name and relative_name, at "
"least one must be None."
)
if full_name:
full_name = list(full_name)
if not all(isinstance(x, GeneralName) for x in full_name):
raise TypeError(
"full_name must be a list of GeneralName objects"
)
if relative_name:
if not isinstance(relative_name, RelativeDistinguishedName):
raise TypeError(
"relative_name must be a RelativeDistinguishedName"
)
if crl_issuer:
crl_issuer = list(crl_issuer)
if not all(isinstance(x, GeneralName) for x in crl_issuer):
raise TypeError(
"crl_issuer must be None or a list of general names"
)
if reasons and (
not isinstance(reasons, frozenset)
or not all(isinstance(x, ReasonFlags) for x in reasons)
):
raise TypeError("reasons must be None or frozenset of ReasonFlags")
if reasons and (
ReasonFlags.unspecified in reasons
or ReasonFlags.remove_from_crl in reasons
):
raise ValueError(
"unspecified and remove_from_crl are not valid reasons in a "
"DistributionPoint"
)
if reasons and not crl_issuer and not (full_name or relative_name):
raise ValueError(
"You must supply crl_issuer, full_name, or relative_name when "
"reasons is not None"
)
self._full_name = full_name
self._relative_name = relative_name
self._reasons = reasons
self._crl_issuer = crl_issuer
def __repr__(self):
return (
"<DistributionPoint(full_name={0.full_name}, relative_name={0.rela"
"tive_name}, reasons={0.reasons}, "
"crl_issuer={0.crl_issuer})>".format(self)
)
def __eq__(self, other):
if not isinstance(other, DistributionPoint):
return NotImplemented
return (
self.full_name == other.full_name
and self.relative_name == other.relative_name
and self.reasons == other.reasons
and self.crl_issuer == other.crl_issuer
)
def __ne__(self, other):
return not self == other
def __hash__(self):
if self.full_name is not None:
fn = tuple(self.full_name)
else:
fn = None
if self.crl_issuer is not None:
crl_issuer = tuple(self.crl_issuer)
else:
crl_issuer = None
return hash((fn, self.relative_name, self.reasons, crl_issuer))
full_name = utils.read_only_property("_full_name")
relative_name = utils.read_only_property("_relative_name")
reasons = utils.read_only_property("_reasons")
crl_issuer = utils.read_only_property("_crl_issuer")
class ReasonFlags(Enum):
unspecified = "unspecified"
key_compromise = "keyCompromise"
ca_compromise = "cACompromise"
affiliation_changed = "affiliationChanged"
superseded = "superseded"
cessation_of_operation = "cessationOfOperation"
certificate_hold = "certificateHold"
privilege_withdrawn = "privilegeWithdrawn"
aa_compromise = "aACompromise"
remove_from_crl = "removeFromCRL"
@utils.register_interface(ExtensionType)
class PolicyConstraints(object):
oid = ExtensionOID.POLICY_CONSTRAINTS
def __init__(self, require_explicit_policy, inhibit_policy_mapping):
if require_explicit_policy is not None and not isinstance(
require_explicit_policy, six.integer_types
):
raise TypeError(
"require_explicit_policy must be a non-negative integer or "
"None"
)
if inhibit_policy_mapping is not None and not isinstance(
inhibit_policy_mapping, six.integer_types
):
raise TypeError(
"inhibit_policy_mapping must be a non-negative integer or None"
)
if inhibit_policy_mapping is None and require_explicit_policy is None:
raise ValueError(
"At least one of require_explicit_policy and "
"inhibit_policy_mapping must not be None"
)
self._require_explicit_policy = require_explicit_policy
self._inhibit_policy_mapping = inhibit_policy_mapping
def __repr__(self):
return (
u"<PolicyConstraints(require_explicit_policy={0.require_explicit"
u"_policy}, inhibit_policy_mapping={0.inhibit_policy_"
u"mapping})>".format(self)
)
def __eq__(self, other):
if not isinstance(other, PolicyConstraints):
return NotImplemented
return (
self.require_explicit_policy == other.require_explicit_policy
and self.inhibit_policy_mapping == other.inhibit_policy_mapping
)
def __ne__(self, other):
return not self == other
def __hash__(self):
return hash(
(self.require_explicit_policy, self.inhibit_policy_mapping)
)
require_explicit_policy = utils.read_only_property(
"_require_explicit_policy"
)
inhibit_policy_mapping = utils.read_only_property(
"_inhibit_policy_mapping"
)
@utils.register_interface(ExtensionType)
class CertificatePolicies(object):
oid = ExtensionOID.CERTIFICATE_POLICIES
def __init__(self, policies):
policies = list(policies)
if not all(isinstance(x, PolicyInformation) for x in policies):
raise TypeError(
"Every item in the policies list must be a "
"PolicyInformation"
)
self._policies = policies
__len__, __iter__, __getitem__ = _make_sequence_methods("_policies")
def __repr__(self):
return "<CertificatePolicies({})>".format(self._policies)
def __eq__(self, other):
if not isinstance(other, CertificatePolicies):
return NotImplemented
return self._policies == other._policies
def __ne__(self, other):
return not self == other
def __hash__(self):
return hash(tuple(self._policies))
class PolicyInformation(object):
def __init__(self, policy_identifier, policy_qualifiers):
if not isinstance(policy_identifier, ObjectIdentifier):
raise TypeError("policy_identifier must be an ObjectIdentifier")
self._policy_identifier = policy_identifier
if policy_qualifiers:
policy_qualifiers = list(policy_qualifiers)
if not all(
isinstance(x, (six.text_type, UserNotice))
for x in policy_qualifiers
):
raise TypeError(
"policy_qualifiers must be a list of strings and/or "
"UserNotice objects or None"
)
self._policy_qualifiers = policy_qualifiers
def __repr__(self):
return (
"<PolicyInformation(policy_identifier={0.policy_identifier}, polic"
"y_qualifiers={0.policy_qualifiers})>".format(self)
)
def __eq__(self, other):
if not isinstance(other, PolicyInformation):
return NotImplemented
return (
self.policy_identifier == other.policy_identifier
and self.policy_qualifiers == other.policy_qualifiers
)
def __ne__(self, other):
return not self == other
def __hash__(self):
if self.policy_qualifiers is not None:
pq = tuple(self.policy_qualifiers)
else:
pq = None
return hash((self.policy_identifier, pq))
policy_identifier = utils.read_only_property("_policy_identifier")
policy_qualifiers = utils.read_only_property("_policy_qualifiers")
class UserNotice(object):
def __init__(self, notice_reference, explicit_text):
if notice_reference and not isinstance(
notice_reference, NoticeReference
):
raise TypeError(
"notice_reference must be None or a NoticeReference"
)
self._notice_reference = notice_reference
self._explicit_text = explicit_text
def __repr__(self):
return (
"<UserNotice(notice_reference={0.notice_reference}, explicit_text="
"{0.explicit_text!r})>".format(self)
)
def __eq__(self, other):
if not isinstance(other, UserNotice):
return NotImplemented
return (
self.notice_reference == other.notice_reference
and self.explicit_text == other.explicit_text
)
def __ne__(self, other):
return not self == other
def __hash__(self):
return hash((self.notice_reference, self.explicit_text))
notice_reference = utils.read_only_property("_notice_reference")
explicit_text = utils.read_only_property("_explicit_text")
class NoticeReference(object):
def __init__(self, organization, notice_numbers):
self._organization = organization
notice_numbers = list(notice_numbers)
if not all(isinstance(x, int) for x in notice_numbers):
raise TypeError("notice_numbers must be a list of integers")
self._notice_numbers = notice_numbers
def __repr__(self):
return (
"<NoticeReference(organization={0.organization!r}, notice_numbers="
"{0.notice_numbers})>".format(self)
)
def __eq__(self, other):
if not isinstance(other, NoticeReference):
return NotImplemented
return (
self.organization == other.organization
and self.notice_numbers == other.notice_numbers
)
def __ne__(self, other):
return not self == other
def __hash__(self):
return hash((self.organization, tuple(self.notice_numbers)))
organization = utils.read_only_property("_organization")
notice_numbers = utils.read_only_property("_notice_numbers")
@utils.register_interface(ExtensionType)
class ExtendedKeyUsage(object):
oid = ExtensionOID.EXTENDED_KEY_USAGE
def __init__(self, usages):
usages = list(usages)
if not all(isinstance(x, ObjectIdentifier) for x in usages):
raise TypeError(
"Every item in the usages list must be an ObjectIdentifier"
)
self._usages = usages
__len__, __iter__, __getitem__ = _make_sequence_methods("_usages")
def __repr__(self):
return "<ExtendedKeyUsage({})>".format(self._usages)
def __eq__(self, other):
if not isinstance(other, ExtendedKeyUsage):
return NotImplemented
return self._usages == other._usages
def __ne__(self, other):
return not self == other
def __hash__(self):
return hash(tuple(self._usages))
@utils.register_interface(ExtensionType)
class OCSPNoCheck(object):
oid = ExtensionOID.OCSP_NO_CHECK
def __eq__(self, other):
if not isinstance(other, OCSPNoCheck):
return NotImplemented
return True
def __ne__(self, other):
return not self == other
def __hash__(self):
return hash(OCSPNoCheck)
def __repr__(self):
return "<OCSPNoCheck()>"
@utils.register_interface(ExtensionType)
class PrecertPoison(object):
oid = ExtensionOID.PRECERT_POISON
def __eq__(self, other):
if not isinstance(other, PrecertPoison):
return NotImplemented
return True
def __ne__(self, other):
return not self == other
def __hash__(self):
return hash(PrecertPoison)
def __repr__(self):
return "<PrecertPoison()>"
@utils.register_interface(ExtensionType)
class TLSFeature(object):
oid = ExtensionOID.TLS_FEATURE
def __init__(self, features):
features = list(features)
if (
not all(isinstance(x, TLSFeatureType) for x in features)
or len(features) == 0
):
raise TypeError(
"features must be a list of elements from the TLSFeatureType "
"enum"
)
self._features = features
__len__, __iter__, __getitem__ = _make_sequence_methods("_features")
def __repr__(self):
return "<TLSFeature(features={0._features})>".format(self)
def __eq__(self, other):
if not isinstance(other, TLSFeature):
return NotImplemented
return self._features == other._features
def __ne__(self, other):
return not self == other
def __hash__(self):
return hash(tuple(self._features))
class TLSFeatureType(Enum):
# status_request is defined in RFC 6066 and is used for what is commonly
# called OCSP Must-Staple when present in the TLS Feature extension in an
# X.509 certificate.
status_request = 5
# status_request_v2 is defined in RFC 6961 and allows multiple OCSP
# responses to be provided. It is not currently in use by clients or
# servers.
status_request_v2 = 17
_TLS_FEATURE_TYPE_TO_ENUM = {x.value: x for x in TLSFeatureType}
@utils.register_interface(ExtensionType)
class InhibitAnyPolicy(object):
oid = ExtensionOID.INHIBIT_ANY_POLICY
def __init__(self, skip_certs):
if not isinstance(skip_certs, six.integer_types):
raise TypeError("skip_certs must be an integer")
if skip_certs < 0:
raise ValueError("skip_certs must be a non-negative integer")
self._skip_certs = skip_certs
def __repr__(self):
return "<InhibitAnyPolicy(skip_certs={0.skip_certs})>".format(self)
def __eq__(self, other):
if not isinstance(other, InhibitAnyPolicy):
return NotImplemented
return self.skip_certs == other.skip_certs
def __ne__(self, other):
return not self == other
def __hash__(self):
return hash(self.skip_certs)
skip_certs = utils.read_only_property("_skip_certs")
@utils.register_interface(ExtensionType)
class KeyUsage(object):
oid = ExtensionOID.KEY_USAGE
def __init__(
self,
digital_signature,
content_commitment,
key_encipherment,
data_encipherment,
key_agreement,
key_cert_sign,
crl_sign,
encipher_only,
decipher_only,
):
if not key_agreement and (encipher_only or decipher_only):
raise ValueError(
"encipher_only and decipher_only can only be true when "
"key_agreement is true"
)
self._digital_signature = digital_signature
self._content_commitment = content_commitment
self._key_encipherment = key_encipherment
self._data_encipherment = data_encipherment
self._key_agreement = key_agreement
self._key_cert_sign = key_cert_sign
self._crl_sign = crl_sign
self._encipher_only = encipher_only
self._decipher_only = decipher_only
digital_signature = utils.read_only_property("_digital_signature")
content_commitment = utils.read_only_property("_content_commitment")
key_encipherment = utils.read_only_property("_key_encipherment")
data_encipherment = utils.read_only_property("_data_encipherment")
key_agreement = utils.read_only_property("_key_agreement")
key_cert_sign = utils.read_only_property("_key_cert_sign")
crl_sign = utils.read_only_property("_crl_sign")
@property
def encipher_only(self):
if not self.key_agreement:
raise ValueError(
"encipher_only is undefined unless key_agreement is true"
)
else:
return self._encipher_only
@property
def decipher_only(self):
if not self.key_agreement:
raise ValueError(
"decipher_only is undefined unless key_agreement is true"
)
else:
return self._decipher_only
def __repr__(self):
try:
encipher_only = self.encipher_only
decipher_only = self.decipher_only
except ValueError:
# Users found None confusing because even though encipher/decipher
# have no meaning unless key_agreement is true, to construct an
# instance of the class you still need to pass False.
encipher_only = False
decipher_only = False
return (
"<KeyUsage(digital_signature={0.digital_signature}, "
"content_commitment={0.content_commitment}, "
"key_encipherment={0.key_encipherment}, "
"data_encipherment={0.data_encipherment}, "
"key_agreement={0.key_agreement}, "
"key_cert_sign={0.key_cert_sign}, crl_sign={0.crl_sign}, "
"encipher_only={1}, decipher_only={2})>"
).format(self, encipher_only, decipher_only)
def __eq__(self, other):
if not isinstance(other, KeyUsage):
return NotImplemented
return (
self.digital_signature == other.digital_signature
and self.content_commitment == other.content_commitment
and self.key_encipherment == other.key_encipherment
and self.data_encipherment == other.data_encipherment
and self.key_agreement == other.key_agreement
and self.key_cert_sign == other.key_cert_sign
and self.crl_sign == other.crl_sign
and self._encipher_only == other._encipher_only
and self._decipher_only == other._decipher_only
)
def __ne__(self, other):
return not self == other
def __hash__(self):
return hash(
(
self.digital_signature,
self.content_commitment,
self.key_encipherment,
self.data_encipherment,
self.key_agreement,
self.key_cert_sign,
self.crl_sign,
self._encipher_only,
self._decipher_only,
)
)
@utils.register_interface(ExtensionType)
class NameConstraints(object):
oid = ExtensionOID.NAME_CONSTRAINTS
def __init__(self, permitted_subtrees, excluded_subtrees):
if permitted_subtrees is not None:
permitted_subtrees = list(permitted_subtrees)
if not all(isinstance(x, GeneralName) for x in permitted_subtrees):
raise TypeError(
"permitted_subtrees must be a list of GeneralName objects "
"or None"
)
self._validate_ip_name(permitted_subtrees)
if excluded_subtrees is not None:
excluded_subtrees = list(excluded_subtrees)
if not all(isinstance(x, GeneralName) for x in excluded_subtrees):
raise TypeError(
"excluded_subtrees must be a list of GeneralName objects "
"or None"
)
self._validate_ip_name(excluded_subtrees)
if permitted_subtrees is None and excluded_subtrees is None:
raise ValueError(
"At least one of permitted_subtrees and excluded_subtrees "
"must not be None"
)
self._permitted_subtrees = permitted_subtrees
self._excluded_subtrees = excluded_subtrees
def __eq__(self, other):
if not isinstance(other, NameConstraints):
return NotImplemented
return (
self.excluded_subtrees == other.excluded_subtrees
and self.permitted_subtrees == other.permitted_subtrees
)
def __ne__(self, other):
return not self == other
def _validate_ip_name(self, tree):
if any(
isinstance(name, IPAddress)
and not isinstance(
name.value, (ipaddress.IPv4Network, ipaddress.IPv6Network)
)
for name in tree
):
raise TypeError(
"IPAddress name constraints must be an IPv4Network or"
" IPv6Network object"
)
def __repr__(self):
return (
u"<NameConstraints(permitted_subtrees={0.permitted_subtrees}, "
u"excluded_subtrees={0.excluded_subtrees})>".format(self)
)
def __hash__(self):
if self.permitted_subtrees is not None:
ps = tuple(self.permitted_subtrees)
else:
ps = None
if self.excluded_subtrees is not None:
es = tuple(self.excluded_subtrees)
else:
es = None
return hash((ps, es))
permitted_subtrees = utils.read_only_property("_permitted_subtrees")
excluded_subtrees = utils.read_only_property("_excluded_subtrees")
class Extension(object):
def __init__(self, oid, critical, value):
if not isinstance(oid, ObjectIdentifier):
raise TypeError(
"oid argument must be an ObjectIdentifier instance."
)
if not isinstance(critical, bool):
raise TypeError("critical must be a boolean value")
self._oid = oid
self._critical = critical
self._value = value
oid = utils.read_only_property("_oid")
critical = utils.read_only_property("_critical")
value = utils.read_only_property("_value")
def __repr__(self):
return (
"<Extension(oid={0.oid}, critical={0.critical}, "
"value={0.value})>"
).format(self)
def __eq__(self, other):
if not isinstance(other, Extension):
return NotImplemented
return (
self.oid == other.oid
and self.critical == other.critical
and self.value == other.value
)
def __ne__(self, other):
return not self == other
def __hash__(self):
return hash((self.oid, self.critical, self.value))
class GeneralNames(object):
def __init__(self, general_names):
general_names = list(general_names)
if not all(isinstance(x, GeneralName) for x in general_names):
raise TypeError(
"Every item in the general_names list must be an "
"object conforming to the GeneralName interface"
)
self._general_names = general_names
__len__, __iter__, __getitem__ = _make_sequence_methods("_general_names")
def get_values_for_type(self, type):
# Return the value of each GeneralName, except for OtherName instances
# which we return directly because it has two important properties not
# just one value.
objs = (i for i in self if isinstance(i, type))
if type != OtherName:
objs = (i.value for i in objs)
return list(objs)
def __repr__(self):
return "<GeneralNames({})>".format(self._general_names)
def __eq__(self, other):
if not isinstance(other, GeneralNames):
return NotImplemented
return self._general_names == other._general_names
def __ne__(self, other):
return not self == other
def __hash__(self):
return hash(tuple(self._general_names))
@utils.register_interface(ExtensionType)
class SubjectAlternativeName(object):
oid = ExtensionOID.SUBJECT_ALTERNATIVE_NAME
def __init__(self, general_names):
self._general_names = GeneralNames(general_names)
__len__, __iter__, __getitem__ = _make_sequence_methods("_general_names")
def get_values_for_type(self, type):
return self._general_names.get_values_for_type(type)
def __repr__(self):
return "<SubjectAlternativeName({})>".format(self._general_names)
def __eq__(self, other):
if not isinstance(other, SubjectAlternativeName):
return NotImplemented
return self._general_names == other._general_names
def __ne__(self, other):
return not self == other
def __hash__(self):
return hash(self._general_names)
@utils.register_interface(ExtensionType)
class IssuerAlternativeName(object):
oid = ExtensionOID.ISSUER_ALTERNATIVE_NAME
def __init__(self, general_names):
self._general_names = GeneralNames(general_names)
__len__, __iter__, __getitem__ = _make_sequence_methods("_general_names")
def get_values_for_type(self, type):
return self._general_names.get_values_for_type(type)
def __repr__(self):
return "<IssuerAlternativeName({})>".format(self._general_names)
def __eq__(self, other):
if not isinstance(other, IssuerAlternativeName):
return NotImplemented
return self._general_names == other._general_names
def __ne__(self, other):
return not self == other
def __hash__(self):
return hash(self._general_names)
@utils.register_interface(ExtensionType)
class CertificateIssuer(object):
oid = CRLEntryExtensionOID.CERTIFICATE_ISSUER
def __init__(self, general_names):
self._general_names = GeneralNames(general_names)
__len__, __iter__, __getitem__ = _make_sequence_methods("_general_names")
def get_values_for_type(self, type):
return self._general_names.get_values_for_type(type)
def __repr__(self):
return "<CertificateIssuer({})>".format(self._general_names)
def __eq__(self, other):
if not isinstance(other, CertificateIssuer):
return NotImplemented
return self._general_names == other._general_names
def __ne__(self, other):
return not self == other
def __hash__(self):
return hash(self._general_names)
@utils.register_interface(ExtensionType)
class CRLReason(object):
oid = CRLEntryExtensionOID.CRL_REASON
def __init__(self, reason):
if not isinstance(reason, ReasonFlags):
raise TypeError("reason must be an element from ReasonFlags")
self._reason = reason
def __repr__(self):
return "<CRLReason(reason={})>".format(self._reason)
def __eq__(self, other):
if not isinstance(other, CRLReason):
return NotImplemented
return self.reason == other.reason
def __ne__(self, other):
return not self == other
def __hash__(self):
return hash(self.reason)
reason = utils.read_only_property("_reason")
@utils.register_interface(ExtensionType)
class InvalidityDate(object):
oid = CRLEntryExtensionOID.INVALIDITY_DATE
def __init__(self, invalidity_date):
if not isinstance(invalidity_date, datetime.datetime):
raise TypeError("invalidity_date must be a datetime.datetime")
self._invalidity_date = invalidity_date
def __repr__(self):
return "<InvalidityDate(invalidity_date={})>".format(
self._invalidity_date
)
def __eq__(self, other):
if not isinstance(other, InvalidityDate):
return NotImplemented
return self.invalidity_date == other.invalidity_date
def __ne__(self, other):
return not self == other
def __hash__(self):
return hash(self.invalidity_date)
invalidity_date = utils.read_only_property("_invalidity_date")
@utils.register_interface(ExtensionType)
class PrecertificateSignedCertificateTimestamps(object):
oid = ExtensionOID.PRECERT_SIGNED_CERTIFICATE_TIMESTAMPS
def __init__(self, signed_certificate_timestamps):
signed_certificate_timestamps = list(signed_certificate_timestamps)
if not all(
isinstance(sct, SignedCertificateTimestamp)
for sct in signed_certificate_timestamps
):
raise TypeError(
"Every item in the signed_certificate_timestamps list must be "
"a SignedCertificateTimestamp"
)
self._signed_certificate_timestamps = signed_certificate_timestamps
__len__, __iter__, __getitem__ = _make_sequence_methods(
"_signed_certificate_timestamps"
)
def __repr__(self):
return "<PrecertificateSignedCertificateTimestamps({})>".format(
list(self)
)
def __hash__(self):
return hash(tuple(self._signed_certificate_timestamps))
def __eq__(self, other):
if not isinstance(other, PrecertificateSignedCertificateTimestamps):
return NotImplemented
return (
self._signed_certificate_timestamps
== other._signed_certificate_timestamps
)
def __ne__(self, other):
return not self == other
@utils.register_interface(ExtensionType)
class SignedCertificateTimestamps(object):
oid = ExtensionOID.SIGNED_CERTIFICATE_TIMESTAMPS
def __init__(self, signed_certificate_timestamps):
signed_certificate_timestamps = list(signed_certificate_timestamps)
if not all(
isinstance(sct, SignedCertificateTimestamp)
for sct in signed_certificate_timestamps
):
raise TypeError(
"Every item in the signed_certificate_timestamps list must be "
"a SignedCertificateTimestamp"
)
self._signed_certificate_timestamps = signed_certificate_timestamps
__len__, __iter__, __getitem__ = _make_sequence_methods(
"_signed_certificate_timestamps"
)
def __repr__(self):
return "<SignedCertificateTimestamps({})>".format(list(self))
def __hash__(self):
return hash(tuple(self._signed_certificate_timestamps))
def __eq__(self, other):
if not isinstance(other, SignedCertificateTimestamps):
return NotImplemented
return (
self._signed_certificate_timestamps
== other._signed_certificate_timestamps
)
def __ne__(self, other):
return not self == other
@utils.register_interface(ExtensionType)
class OCSPNonce(object):
oid = OCSPExtensionOID.NONCE
def __init__(self, nonce):
if not isinstance(nonce, bytes):
raise TypeError("nonce must be bytes")
self._nonce = nonce
def __eq__(self, other):
if not isinstance(other, OCSPNonce):
return NotImplemented
return self.nonce == other.nonce
def __ne__(self, other):
return not self == other
def __hash__(self):
return hash(self.nonce)
def __repr__(self):
return "<OCSPNonce(nonce={0.nonce!r})>".format(self)
nonce = utils.read_only_property("_nonce")
@utils.register_interface(ExtensionType)
class IssuingDistributionPoint(object):
oid = ExtensionOID.ISSUING_DISTRIBUTION_POINT
def __init__(
self,
full_name,
relative_name,
only_contains_user_certs,
only_contains_ca_certs,
only_some_reasons,
indirect_crl,
only_contains_attribute_certs,
):
if only_some_reasons and (
not isinstance(only_some_reasons, frozenset)
or not all(isinstance(x, ReasonFlags) for x in only_some_reasons)
):
raise TypeError(
"only_some_reasons must be None or frozenset of ReasonFlags"
)
if only_some_reasons and (
ReasonFlags.unspecified in only_some_reasons
or ReasonFlags.remove_from_crl in only_some_reasons
):
raise ValueError(
"unspecified and remove_from_crl are not valid reasons in an "
"IssuingDistributionPoint"
)
if not (
isinstance(only_contains_user_certs, bool)
and isinstance(only_contains_ca_certs, bool)
and isinstance(indirect_crl, bool)
and isinstance(only_contains_attribute_certs, bool)
):
raise TypeError(
"only_contains_user_certs, only_contains_ca_certs, "
"indirect_crl and only_contains_attribute_certs "
"must all be boolean."
)
crl_constraints = [
only_contains_user_certs,
only_contains_ca_certs,
indirect_crl,
only_contains_attribute_certs,
]
if len([x for x in crl_constraints if x]) > 1:
raise ValueError(
"Only one of the following can be set to True: "
"only_contains_user_certs, only_contains_ca_certs, "
"indirect_crl, only_contains_attribute_certs"
)
if not any(
[
only_contains_user_certs,
only_contains_ca_certs,
indirect_crl,
only_contains_attribute_certs,
full_name,
relative_name,
only_some_reasons,
]
):
raise ValueError(
"Cannot create empty extension: "
"if only_contains_user_certs, only_contains_ca_certs, "
"indirect_crl, and only_contains_attribute_certs are all False"
", then either full_name, relative_name, or only_some_reasons "
"must have a value."
)
self._only_contains_user_certs = only_contains_user_certs
self._only_contains_ca_certs = only_contains_ca_certs
self._indirect_crl = indirect_crl
self._only_contains_attribute_certs = only_contains_attribute_certs
self._only_some_reasons = only_some_reasons
self._full_name = full_name
self._relative_name = relative_name
def __repr__(self):
return (
"<IssuingDistributionPoint(full_name={0.full_name}, "
"relative_name={0.relative_name}, "
"only_contains_user_certs={0.only_contains_user_certs}, "
"only_contains_ca_certs={0.only_contains_ca_certs}, "
"only_some_reasons={0.only_some_reasons}, "
"indirect_crl={0.indirect_crl}, "
"only_contains_attribute_certs="
"{0.only_contains_attribute_certs})>".format(self)
)
def __eq__(self, other):
if not isinstance(other, IssuingDistributionPoint):
return NotImplemented
return (
self.full_name == other.full_name
and self.relative_name == other.relative_name
and self.only_contains_user_certs == other.only_contains_user_certs
and self.only_contains_ca_certs == other.only_contains_ca_certs
and self.only_some_reasons == other.only_some_reasons
and self.indirect_crl == other.indirect_crl
and self.only_contains_attribute_certs
== other.only_contains_attribute_certs
)
def __ne__(self, other):
return not self == other
def __hash__(self):
return hash(
(
self.full_name,
self.relative_name,
self.only_contains_user_certs,
self.only_contains_ca_certs,
self.only_some_reasons,
self.indirect_crl,
self.only_contains_attribute_certs,
)
)
full_name = utils.read_only_property("_full_name")
relative_name = utils.read_only_property("_relative_name")
only_contains_user_certs = utils.read_only_property(
"_only_contains_user_certs"
)
only_contains_ca_certs = utils.read_only_property(
"_only_contains_ca_certs"
)
only_some_reasons = utils.read_only_property("_only_some_reasons")
indirect_crl = utils.read_only_property("_indirect_crl")
only_contains_attribute_certs = utils.read_only_property(
"_only_contains_attribute_certs"
)
@utils.register_interface(ExtensionType)
class UnrecognizedExtension(object):
def __init__(self, oid, value):
if not isinstance(oid, ObjectIdentifier):
raise TypeError("oid must be an ObjectIdentifier")
self._oid = oid
self._value = value
oid = utils.read_only_property("_oid")
value = utils.read_only_property("_value")
def __repr__(self):
return (
"<UnrecognizedExtension(oid={0.oid}, "
"value={0.value!r})>".format(self)
)
def __eq__(self, other):
if not isinstance(other, UnrecognizedExtension):
return NotImplemented
return self.oid == other.oid and self.value == other.value
def __ne__(self, other):
return not self == other
def __hash__(self):
return hash((self.oid, self.value))