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OCSP ==== .. currentmodule:: cryptography.x509.ocsp .. testsetup:: import base64 pem_cert = b""" -----BEGIN CERTIFICATE----- MIIFvTCCBKWgAwIBAgICPyAwDQYJKoZIhvcNAQELBQAwRzELMAkGA1UEBhMCVVMx FjAUBgNVBAoTDUdlb1RydXN0IEluYy4xIDAeBgNVBAMTF1JhcGlkU1NMIFNIQTI1 NiBDQSAtIEczMB4XDTE0MTAxNTEyMDkzMloXDTE4MTExNjAxMTUwM1owgZcxEzAR BgNVBAsTCkdUNDg3NDI5NjUxMTAvBgNVBAsTKFNlZSB3d3cucmFwaWRzc2wuY29t L3Jlc291cmNlcy9jcHMgKGMpMTQxLzAtBgNVBAsTJkRvbWFpbiBDb250cm9sIFZh bGlkYXRlZCAtIFJhcGlkU1NMKFIpMRwwGgYDVQQDExN3d3cuY3J5cHRvZ3JhcGh5 LmlvMIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAom/FebKJIot7Sp3s itG1sicpe3thCssjI+g1JDAS7I3GLVNmbms1DOdIIqwf01gZkzzXBN2+9sOnyRaR PPfCe1jTr3dk2y6rPE559vPa1nZQkhlzlhMhlPyjaT+S7g4Tio4qV2sCBZU01DZJ CaksfohN+5BNVWoJzTbOcrHOEJ+M8B484KlBCiSxqf9cyNQKru4W3bHaCVNVJ8eu 6i6KyhzLa0L7yK3LXwwXVs583C0/vwFhccGWsFODqD/9xHUzsBIshE8HKjdjDi7Y 3BFQzVUQFjBB50NSZfAA/jcdt1blxJouc7z9T8Oklh+V5DDBowgAsrT4b6Z2Fq6/ r7D1GqivLK/ypUQmxq2WXWAUBb/Q6xHgxASxI4Br+CByIUQJsm8L2jzc7k+mF4hW ltAIUkbo8fGiVnat0505YJgxWEDKOLc4Gda6d/7GVd5AvKrz242bUqeaWo6e4MTx diku2Ma3rhdcr044Qvfh9hGyjqNjvhWY/I+VRWgihU7JrYvgwFdJqsQ5eiKT4OHi gsejvWwkZzDtiQ+aQTrzM1FsY2swJBJsLSX4ofohlVRlIJCn/ME+XErj553431Lu YQ5SzMd3nXzN78Vj6qzTfMUUY72UoT1/AcFiUMobgIqrrmwuNxfrkbVE2b6Bga74 FsJX63prvrJ41kuHK/16RQBM7fcCAwEAAaOCAWAwggFcMB8GA1UdIwQYMBaAFMOc 8/zTRgg0u85Gf6B8W/PiCMtZMFcGCCsGAQUFBwEBBEswSTAfBggrBgEFBQcwAYYT aHR0cDovL2d2LnN5bWNkLmNvbTAmBggrBgEFBQcwAoYaaHR0cDovL2d2LnN5bWNi LmNvbS9ndi5jcnQwDgYDVR0PAQH/BAQDAgWgMB0GA1UdJQQWMBQGCCsGAQUFBwMB BggrBgEFBQcDAjAvBgNVHREEKDAmghN3d3cuY3J5cHRvZ3JhcGh5Lmlvgg9jcnlw dG9ncmFwaHkuaW8wKwYDVR0fBCQwIjAgoB6gHIYaaHR0cDovL2d2LnN5bWNiLmNv bS9ndi5jcmwwDAYDVR0TAQH/BAIwADBFBgNVHSAEPjA8MDoGCmCGSAGG+EUBBzYw LDAqBggrBgEFBQcCARYeaHR0cHM6Ly93d3cucmFwaWRzc2wuY29tL2xlZ2FsMA0G CSqGSIb3DQEBCwUAA4IBAQAzIYO2jx7h17FBT74tJ2zbV9OKqGb7QF8y3wUtP4xc dH80vprI/Cfji8s86kr77aAvAqjDjaVjHn7UzebhSUivvRPmfzRgyWBacomnXTSt Xlt2dp2nDQuwGyK2vB7dMfKnQAkxwq1sYUXznB8i0IhhCAoXp01QGPKq51YoIlnF 7DRMk6iEaL1SJbkIrLsCQyZFDf0xtfW9DqXugMMLoxeCsBhZJQzNyS2ryirrv9LH aK3+6IZjrcyy9bkpz/gzJucyhU+75c4My/mnRCrtItRbCQuiI5pd5poDowm+HH9i GVI9+0lAFwxOUnOnwsoI40iOoxjLMGB+CgFLKCGUcWxP -----END CERTIFICATE----- """ pem_issuer = b""" -----BEGIN CERTIFICATE----- MIIEJTCCAw2gAwIBAgIDAjp3MA0GCSqGSIb3DQEBCwUAMEIxCzAJBgNVBAYTAlVT MRYwFAYDVQQKEw1HZW9UcnVzdCBJbmMuMRswGQYDVQQDExJHZW9UcnVzdCBHbG9i YWwgQ0EwHhcNMTQwODI5MjEzOTMyWhcNMjIwNTIwMjEzOTMyWjBHMQswCQYDVQQG EwJVUzEWMBQGA1UEChMNR2VvVHJ1c3QgSW5jLjEgMB4GA1UEAxMXUmFwaWRTU0wg U0hBMjU2IENBIC0gRzMwggEiMA0GCSqGSIb3DQEBAQUAA4IBDwAwggEKAoIBAQCv VJvZWF0eLFbG1eh/9H0WA//Qi1rkjqfdVC7UBMBdmJyNkA+8EGVf2prWRHzAn7Xp SowLBkMEu/SW4ib2YQGRZjEiwzQ0Xz8/kS9EX9zHFLYDn4ZLDqP/oIACg8PTH2lS 1p1kD8mD5xvEcKyU58Okaiy9uJ5p2L4KjxZjWmhxgHsw3hUEv8zTvz5IBVV6s9cQ DAP8m/0Ip4yM26eO8R5j3LMBL3+vV8M8SKeDaCGnL+enP/C1DPz1hNFTvA5yT2AM QriYrRmIV9cE7Ie/fodOoyH5U/02mEiN1vi7SPIpyGTRzFRIU4uvt2UevykzKdkp YEj4/5G8V1jlNS67abZZAgMBAAGjggEdMIIBGTAfBgNVHSMEGDAWgBTAephojYn7 qwVkDBF9qn1luMrMTjAdBgNVHQ4EFgQUw5zz/NNGCDS7zkZ/oHxb8+IIy1kwEgYD VR0TAQH/BAgwBgEB/wIBADAOBgNVHQ8BAf8EBAMCAQYwNQYDVR0fBC4wLDAqoCig JoYkaHR0cDovL2cuc3ltY2IuY29tL2NybHMvZ3RnbG9iYWwuY3JsMC4GCCsGAQUF BwEBBCIwIDAeBggrBgEFBQcwAYYSaHR0cDovL2cuc3ltY2QuY29tMEwGA1UdIARF MEMwQQYKYIZIAYb4RQEHNjAzMDEGCCsGAQUFBwIBFiVodHRwOi8vd3d3Lmdlb3Ry dXN0LmNvbS9yZXNvdXJjZXMvY3BzMA0GCSqGSIb3DQEBCwUAA4IBAQCjWB7GQzKs rC+TeLfqrlRARy1+eI1Q9vhmrNZPc9ZE768LzFvB9E+aj0l+YK/CJ8cW8fuTgZCp fO9vfm5FlBaEvexJ8cQO9K8EWYOHDyw7l8NaEpt7BDV7o5UzCHuTcSJCs6nZb0+B kvwHtnm8hEqddwnxxYny8LScVKoSew26T++TGezvfU5ho452nFnPjJSxhJf3GrkH uLLGTxN5279PURt/aQ1RKsHWFf83UTRlUfQevjhq7A6rvz17OQV79PP7GqHQyH5O ZI3NjGFVkP46yl0lD/gdo0p0Vk8aVUBwdSWmMy66S6VdU5oNMOGNX2Esr8zvsJmh gP8L8mJMcCaY -----END CERTIFICATE----- """ pem_responder_cert = b""" -----BEGIN CERTIFICATE----- MIIBPjCB5KADAgECAgQHW80VMAoGCCqGSM49BAMCMCcxCzAJBgNVBAYTAlVTMRgw FgYDVQQDDA9DcnlwdG9ncmFwaHkgQ0EwHhcNMTgxMDA3MTIzNTEwWhcNMjgxMDA0 MTIzNTEwWjAnMQswCQYDVQQGEwJVUzEYMBYGA1UEAwwPQ3J5cHRvZ3JhcGh5IENB MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEbQ2E0N/E3R0zEG+qa+yAFXBY6Fte QzyvFdq7EZHDktlyUllaVJBrbX1ItV0MlayFwwQPhZmuLPpQBzuVKyrUfTAKBggq hkjOPQQDAgNJADBGAiEAo0NQRmfPvhWQpSvJzV+2Ag441Zeckk+bib7swduQIjIC IQCqYD9pArB2SWfmhQCSZkNEATlsPIML8lvlSkbNcrmrqQ== -----END CERTIFICATE----- """ pem_responder_key = b""" -----BEGIN PRIVATE KEY----- MIGHAgEAMBMGByqGSM49AgEGCCqGSM49AwEHBG0wawIBAQQgO+vsRu8xDIVZE+xh s8ESqJqcpJlwmj8CtF8HPHxrDSGhRANCAARtDYTQ38TdHTMQb6pr7IAVcFjoW15D PK8V2rsRkcOS2XJSWVpUkGttfUi1XQyVrIXDBA+Fma4s+lAHO5UrKtR9 -----END PRIVATE KEY----- """ der_ocsp_req = ( b"0V0T0R0P0N0\t\x06\x05+\x0e\x03\x02\x1a\x05\x00\x04\x148\xcaF\x8c" b"\x07D\x8d\xf4\x81\x96\xc7mmLpQ\x9e`\xa7\xbd\x04\x14yu\xbb\x84:\xcb" b",\xdez\t\xbe1\x1bC\xbc\x1c*MSX\x02\x15\x00\x98\xd9\xe5\xc0\xb4\xc3" b"sU-\xf7|]\x0f\x1e\xb5\x12\x8eIE\xf9" ) der_ocsp_resp_unauth = b"0\x03\n\x01\x06" OCSP (Online Certificate Status Protocol) is a method of checking the revocation status of certificates. It is specified in :rfc:`6960`, as well as other obsoleted RFCs. Loading Requests ~~~~~~~~~~~~~~~~ .. function:: load_der_ocsp_request(data) .. versionadded:: 2.4 Deserialize an OCSP request from DER encoded data. :param bytes data: The DER encoded OCSP request data. :returns: An instance of :class:`~cryptography.x509.ocsp.OCSPRequest`. .. doctest:: >>> from cryptography.x509 import ocsp >>> ocsp_req = ocsp.load_der_ocsp_request(der_ocsp_req) >>> print(ocsp_req.serial_number) 872625873161273451176241581705670534707360122361 Creating Requests ~~~~~~~~~~~~~~~~~ .. class:: OCSPRequestBuilder .. versionadded:: 2.4 This class is used to create :class:`~cryptography.x509.ocsp.OCSPRequest` objects. .. method:: add_certificate(cert, issuer, algorithm) Adds a request using a certificate, issuer certificate, and hash algorithm. This can only be called once. :param cert: The :class:`~cryptography.x509.Certificate` whose validity is being checked. :param issuer: The issuer :class:`~cryptography.x509.Certificate` of the certificate that is being checked. :param algorithm: A :class:`~cryptography.hazmat.primitives.hashes.HashAlgorithm` instance. For OCSP only :class:`~cryptography.hazmat.primitives.hashes.SHA1`, :class:`~cryptography.hazmat.primitives.hashes.SHA224`, :class:`~cryptography.hazmat.primitives.hashes.SHA256`, :class:`~cryptography.hazmat.primitives.hashes.SHA384`, and :class:`~cryptography.hazmat.primitives.hashes.SHA512` are allowed. .. method:: add_extension(extval, critical) Adds an extension to the request. :param extval: An extension conforming to the :class:`~cryptography.x509.ExtensionType` interface. :param critical: Set to ``True`` if the extension must be understood and handled. .. method:: build() :returns: A new :class:`~cryptography.x509.ocsp.OCSPRequest`. .. doctest:: >>> from cryptography.hazmat.primitives import serialization >>> from cryptography.hazmat.primitives.hashes import SHA256 >>> from cryptography.x509 import load_pem_x509_certificate, ocsp >>> cert = load_pem_x509_certificate(pem_cert) >>> issuer = load_pem_x509_certificate(pem_issuer) >>> builder = ocsp.OCSPRequestBuilder() >>> # SHA256 is in this example because while RFC 5019 originally >>> # required SHA1 RFC 6960 updates that to SHA256. >>> # However, depending on your requirements you may need to use SHA1 >>> # for compatibility reasons. >>> builder = builder.add_certificate(cert, issuer, SHA256()) >>> req = builder.build() >>> base64.b64encode(req.public_bytes(serialization.Encoding.DER)) b'MF8wXTBbMFkwVzANBglghkgBZQMEAgEFAAQgn3BowBaoh77h17ULfkX6781dUDPD82Taj8wO1jZWhZoEINxPgjoQth3w7q4AouKKerMxIMIuUG4EuWU2pZfwih52AgI/IA==' Loading Responses ~~~~~~~~~~~~~~~~~ .. function:: load_der_ocsp_response(data) .. versionadded:: 2.4 Deserialize an OCSP response from DER encoded data. :param bytes data: The DER encoded OCSP response data. :returns: An instance of :class:`~cryptography.x509.ocsp.OCSPResponse`. .. doctest:: >>> from cryptography.x509 import ocsp >>> ocsp_resp = ocsp.load_der_ocsp_response(der_ocsp_resp_unauth) >>> print(ocsp_resp.response_status) OCSPResponseStatus.UNAUTHORIZED Creating Responses ~~~~~~~~~~~~~~~~~~ .. class:: OCSPResponseBuilder .. versionadded:: 2.4 This class is used to create :class:`~cryptography.x509.ocsp.OCSPResponse` objects. You cannot set ``produced_at`` on OCSP responses at this time. Instead the field is set to current UTC time when calling ``sign``. For unsuccessful statuses call the class method :meth:`~cryptography.x509.ocsp.OCSPResponseBuilder.build_unsuccessful`. .. method:: add_response(cert, issuer, algorithm, cert_status, this_update, next_update, revocation_time, revocation_reason) This method adds status information about the certificate that was requested to the response. :param cert: The :class:`~cryptography.x509.Certificate` whose validity is being checked. :param issuer: The issuer :class:`~cryptography.x509.Certificate` of the certificate that is being checked. :param algorithm: A :class:`~cryptography.hazmat.primitives.hashes.HashAlgorithm` instance. For OCSP only :class:`~cryptography.hazmat.primitives.hashes.SHA1`, :class:`~cryptography.hazmat.primitives.hashes.SHA224`, :class:`~cryptography.hazmat.primitives.hashes.SHA256`, :class:`~cryptography.hazmat.primitives.hashes.SHA384`, and :class:`~cryptography.hazmat.primitives.hashes.SHA512` are allowed. :param cert_status: An item from the :class:`~cryptography.x509.ocsp.OCSPCertStatus` enumeration. :param this_update: A naïve :class:`datetime.datetime` object representing the most recent time in UTC at which the status being indicated is known by the responder to be correct. :param next_update: A naïve :class:`datetime.datetime` object or ``None``. The time in UTC at or before which newer information will be available about the status of the certificate. :param revocation_time: A naïve :class:`datetime.datetime` object or ``None`` if the ``cert`` is not revoked. The time in UTC at which the certificate was revoked. :param revocation_reason: An item from the :class:`~cryptography.x509.ReasonFlags` enumeration or ``None`` if the ``cert`` is not revoked. .. method:: certificates(certs) Add additional certificates that should be used to verify the signature on the response. This is typically used when the responder utilizes an OCSP delegate. :param list certs: A list of :class:`~cryptography.x509.Certificate` objects. .. method:: responder_id(encoding, responder_cert) Set the ``responderID`` on the OCSP response. This is the data a client will use to determine what certificate signed the response. :param responder_cert: The :class:`~cryptography.x509.Certificate` object for the certificate whose private key will sign the OCSP response. If the certificate and key do not match an error will be raised when calling ``sign``. :param encoding: Either :attr:`~cryptography.x509.ocsp.OCSPResponderEncoding.HASH` or :attr:`~cryptography.x509.ocsp.OCSPResponderEncoding.NAME`. .. method:: add_extension(extval, critical) Adds an extension to the response. :param extval: An extension conforming to the :class:`~cryptography.x509.ExtensionType` interface. :param critical: Set to ``True`` if the extension must be understood and handled. .. method:: sign(private_key, algorithm) Creates the OCSP response that can then be serialized and sent to clients. This method will create a :attr:`~cryptography.x509.ocsp.OCSPResponseStatus.SUCCESSFUL` response. :param private_key: The :class:`~cryptography.hazmat.primitives.asymmetric.rsa.RSAPrivateKey`, :class:`~cryptography.hazmat.primitives.asymmetric.dsa.DSAPrivateKey`, :class:`~cryptography.hazmat.primitives.asymmetric.ec.EllipticCurvePrivateKey`, :class:`~cryptography.hazmat.primitives.asymmetric.ed25519.Ed25519PrivateKey` or :class:`~cryptography.hazmat.primitives.asymmetric.ed448.Ed448PrivateKey` that will be used to sign the certificate. :param algorithm: The :class:`~cryptography.hazmat.primitives.hashes.HashAlgorithm` that will be used to generate the signature. This must be ``None`` if the ``private_key`` is an :class:`~cryptography.hazmat.primitives.asymmetric.ed25519.Ed25519PrivateKey` or an :class:`~cryptography.hazmat.primitives.asymmetric.ed448.Ed448PrivateKey` and an instance of a :class:`~cryptography.hazmat.primitives.hashes.HashAlgorithm` otherwise. :returns: A new :class:`~cryptography.x509.ocsp.OCSPResponse`. .. doctest:: >>> import datetime >>> from cryptography.hazmat.primitives import hashes, serialization >>> from cryptography.x509 import load_pem_x509_certificate, ocsp >>> cert = load_pem_x509_certificate(pem_cert) >>> issuer = load_pem_x509_certificate(pem_issuer) >>> responder_cert = load_pem_x509_certificate(pem_responder_cert) >>> responder_key = serialization.load_pem_private_key(pem_responder_key, None) >>> builder = ocsp.OCSPResponseBuilder() >>> # SHA256 is in this example because while RFC 5019 originally >>> # required SHA1 RFC 6960 updates that to SHA256. >>> # However, depending on your requirements you may need to use SHA1 >>> # for compatibility reasons. >>> builder = builder.add_response( ... cert=cert, issuer=issuer, algorithm=hashes.SHA256(), ... cert_status=ocsp.OCSPCertStatus.GOOD, ... this_update=datetime.datetime.now(), ... next_update=datetime.datetime.now(), ... revocation_time=None, revocation_reason=None ... ).responder_id( ... ocsp.OCSPResponderEncoding.HASH, responder_cert ... ) >>> response = builder.sign(responder_key, hashes.SHA256()) >>> response.certificate_status <OCSPCertStatus.GOOD: 0> .. classmethod:: build_unsuccessful(response_status) Creates an unsigned OCSP response which can then be serialized and sent to clients. ``build_unsuccessful`` may only be called with a :class:`~cryptography.x509.ocsp.OCSPResponseStatus` that is not ``SUCCESSFUL``. Since this is a class method note that no other methods can or should be called as unsuccessful statuses do not encode additional data. :returns: A new :class:`~cryptography.x509.ocsp.OCSPResponse`. .. doctest:: >>> from cryptography.hazmat.primitives import hashes, serialization >>> from cryptography.x509 import load_pem_x509_certificate, ocsp >>> response = ocsp.OCSPResponseBuilder.build_unsuccessful( ... ocsp.OCSPResponseStatus.UNAUTHORIZED ... ) >>> response.response_status <OCSPResponseStatus.UNAUTHORIZED: 6> Interfaces ~~~~~~~~~~ .. class:: OCSPRequest .. versionadded:: 2.4 An ``OCSPRequest`` is an object containing information about a certificate whose status is being checked. .. attribute:: issuer_key_hash :type: bytes The hash of the certificate issuer's key. The hash algorithm used is defined by the ``hash_algorithm`` property. .. attribute:: issuer_name_hash :type: bytes The hash of the certificate issuer's name. The hash algorithm used is defined by the ``hash_algorithm`` property. .. attribute:: hash_algorithm :type: :class:`~cryptography.hazmat.primitives.hashes.HashAlgorithm` The algorithm used to generate the ``issuer_key_hash`` and ``issuer_name_hash``. .. attribute:: serial_number :type: int The serial number of the certificate to check. .. attribute:: extensions :type: :class:`~cryptography.x509.Extensions` The extensions encoded in the request. .. method:: public_bytes(encoding) :param encoding: The encoding to use. Only :attr:`~cryptography.hazmat.primitives.serialization.Encoding.DER` is supported. :return bytes: The serialized OCSP request. .. class:: OCSPResponse .. versionadded:: 2.4 An ``OCSPResponse`` is the data provided by an OCSP responder in response to an ``OCSPRequest``. .. attribute:: response_status :type: :class:`~cryptography.x509.ocsp.OCSPResponseStatus` The status of the response. .. attribute:: signature_algorithm_oid :type: :class:`~cryptography.x509.ObjectIdentifier` Returns the object identifier of the signature algorithm used to sign the response. This will be one of the OIDs from :class:`~cryptography.x509.oid.SignatureAlgorithmOID`. :raises ValueError: If ``response_status`` is not :class:`~cryptography.x509.ocsp.OCSPResponseStatus.SUCCESSFUL`. .. attribute:: signature_hash_algorithm .. versionadded:: 2.5 :type: :class:`~cryptography.hazmat.primitives.hashes.HashAlgorithm` Returns the :class:`~cryptography.hazmat.primitives.hashes.HashAlgorithm` which was used in signing this response. Can be ``None`` if signature did not use separate hash (:attr:`~cryptography.x509.oid.SignatureAlgorithmOID.ED25519`, :attr:`~cryptography.x509.oid.SignatureAlgorithmOID.ED448`). .. attribute:: signature :type: bytes The signature bytes. :raises ValueError: If ``response_status`` is not :class:`~cryptography.x509.ocsp.OCSPResponseStatus.SUCCESSFUL`. .. attribute:: tbs_response_bytes :type: bytes The DER encoded bytes payload that is hashed and then signed. This data may be used to validate the signature on the OCSP response. :raises ValueError: If ``response_status`` is not :class:`~cryptography.x509.ocsp.OCSPResponseStatus.SUCCESSFUL`. .. attribute:: certificates :type: list A list of zero or more :class:`~cryptography.x509.Certificate` objects used to help build a chain to verify the OCSP response. This situation occurs when the OCSP responder uses a delegate certificate. :raises ValueError: If ``response_status`` is not :class:`~cryptography.x509.ocsp.OCSPResponseStatus.SUCCESSFUL`. .. attribute:: responder_key_hash :type: bytes or None The responder's key hash or ``None`` if the response has a ``responder_name``. :raises ValueError: If ``response_status`` is not :class:`~cryptography.x509.ocsp.OCSPResponseStatus.SUCCESSFUL`. .. attribute:: responder_name :type: :class:`~cryptography.x509.Name` or None The responder's ``Name`` or ``None`` if the response has a ``responder_key_hash``. :raises ValueError: If ``response_status`` is not :class:`~cryptography.x509.ocsp.OCSPResponseStatus.SUCCESSFUL`. .. attribute:: produced_at :type: :class:`datetime.datetime` A naïve datetime representing the time when the response was produced. :raises ValueError: If ``response_status`` is not :class:`~cryptography.x509.ocsp.OCSPResponseStatus.SUCCESSFUL`. .. attribute:: certificate_status :type: :class:`~cryptography.x509.ocsp.OCSPCertStatus` The status of the certificate being checked. :raises ValueError: If ``response_status`` is not :class:`~cryptography.x509.ocsp.OCSPResponseStatus.SUCCESSFUL`. .. attribute:: revocation_time :type: :class:`datetime.datetime` or None A naïve datetime representing the time when the certificate was revoked or ``None`` if the certificate has not been revoked. :raises ValueError: If ``response_status`` is not :class:`~cryptography.x509.ocsp.OCSPResponseStatus.SUCCESSFUL`. .. attribute:: revocation_reason :type: :class:`~cryptography.x509.ReasonFlags` or None The reason the certificate was revoked or ``None`` if not specified or not revoked. :raises ValueError: If ``response_status`` is not :class:`~cryptography.x509.ocsp.OCSPResponseStatus.SUCCESSFUL`. .. attribute:: this_update :type: :class:`datetime.datetime` A naïve datetime representing the most recent time at which the status being indicated is known by the responder to have been correct. :raises ValueError: If ``response_status`` is not :class:`~cryptography.x509.ocsp.OCSPResponseStatus.SUCCESSFUL`. .. attribute:: next_update :type: :class:`datetime.datetime` A naïve datetime representing the time when newer information will be available. :raises ValueError: If ``response_status`` is not :class:`~cryptography.x509.ocsp.OCSPResponseStatus.SUCCESSFUL`. .. attribute:: issuer_key_hash :type: bytes The hash of the certificate issuer's key. The hash algorithm used is defined by the ``hash_algorithm`` property. :raises ValueError: If ``response_status`` is not :class:`~cryptography.x509.ocsp.OCSPResponseStatus.SUCCESSFUL`. .. attribute:: issuer_name_hash :type: bytes The hash of the certificate issuer's name. The hash algorithm used is defined by the ``hash_algorithm`` property. :raises ValueError: If ``response_status`` is not :class:`~cryptography.x509.ocsp.OCSPResponseStatus.SUCCESSFUL`. .. attribute:: hash_algorithm :type: :class:`~cryptography.hazmat.primitives.hashes.HashAlgorithm` The algorithm used to generate the ``issuer_key_hash`` and ``issuer_name_hash``. :raises ValueError: If ``response_status`` is not :class:`~cryptography.x509.ocsp.OCSPResponseStatus.SUCCESSFUL`. .. attribute:: serial_number :type: int The serial number of the certificate that was checked. :raises ValueError: If ``response_status`` is not :class:`~cryptography.x509.ocsp.OCSPResponseStatus.SUCCESSFUL`. .. attribute:: extensions :type: :class:`~cryptography.x509.Extensions` The extensions encoded in the response. .. attribute:: single_extensions .. versionadded:: 2.9 :type: :class:`~cryptography.x509.Extensions` The single extensions encoded in the response. .. method:: public_bytes(encoding) :param encoding: The encoding to use. Only :attr:`~cryptography.hazmat.primitives.serialization.Encoding.DER` is supported. :return bytes: The serialized OCSP response. .. class:: OCSPResponseStatus .. versionadded:: 2.4 An enumeration of response statuses. .. attribute:: SUCCESSFUL Represents a successful OCSP response. .. attribute:: MALFORMED_REQUEST May be returned by an OCSP responder that is unable to parse a given request. .. attribute:: INTERNAL_ERROR May be returned by an OCSP responder that is currently experiencing operational problems. .. attribute:: TRY_LATER May be returned by an OCSP responder that is overloaded. .. attribute:: SIG_REQUIRED May be returned by an OCSP responder that requires signed OCSP requests. .. attribute:: UNAUTHORIZED May be returned by an OCSP responder when queried for a certificate for which the responder is unaware or an issuer for which the responder is not authoritative. .. class:: OCSPCertStatus .. versionadded:: 2.4 An enumeration of certificate statuses in an OCSP response. .. attribute:: GOOD The value for a certificate that is not revoked. .. attribute:: REVOKED The certificate being checked is revoked. .. attribute:: UNKNOWN The certificate being checked is not known to the OCSP responder. .. class:: OCSPResponderEncoding .. versionadded:: 2.4 An enumeration of ``responderID`` encodings that can be passed to :meth:`~cryptography.x509.ocsp.OCSPResponseBuilder.responder_id`. .. attribute:: HASH Encode the hash of the public key whose corresponding private key signed the response. .. attribute:: NAME Encode the X.509 ``Name`` of the certificate whose private key signed the response.