diff options
| -rw-r--r-- | docs/x509/reference.rst | 124 | ||||
| -rw-r--r-- | src/cryptography/hazmat/backends/multibackend.py | 18 | ||||
| -rw-r--r-- | src/cryptography/hazmat/backends/openssl/backend.py | 26 | ||||
| -rw-r--r-- | src/cryptography/hazmat/backends/openssl/x509.py | 221 | ||||
| -rw-r--r-- | src/cryptography/x509/__init__.py | 6 | ||||
| -rw-r--r-- | src/cryptography/x509/base.py | 14 | ||||
| -rw-r--r-- | tests/hazmat/backends/test_multibackend.py | 12 | ||||
| -rw-r--r-- | tests/test_x509.py | 249 |
8 files changed, 644 insertions, 26 deletions
diff --git a/docs/x509/reference.rst b/docs/x509/reference.rst index 97224c9f..fe52727c 100644 --- a/docs/x509/reference.rst +++ b/docs/x509/reference.rst @@ -5,6 +5,21 @@ X.509 Reference .. testsetup:: + pem_crl_data = b""" + -----BEGIN X509 CRL----- + MIIBtDCBnQIBAjANBgkqhkiG9w0BAQsFADAnMQswCQYDVQQGEwJVUzEYMBYGA1UE + AwwPY3J5cHRvZ3JhcGh5LmlvGA8yMDE1MDEwMTAwMDAwMFoYDzIwMTYwMTAxMDAw + MDAwWjA+MDwCAQAYDzIwMTUwMTAxMDAwMDAwWjAmMBgGA1UdGAQRGA8yMDE1MDEw + MTAwMDAwMFowCgYDVR0VBAMKAQEwDQYJKoZIhvcNAQELBQADggEBABRA4ww50Lz5 + zk1j2+aluC4HPHqb7o06h4pTDcCGeXUKXIGeP5ntGGmIoxa26sNoLeOr8+5b43Gf + yWraHertllOwaOpNFEe+YZFaE9femtoDbf+GLMvRx/0wDfd3KxPoXnXKMXb2d1w4 + RCLgmkYx6JyvS+5ciuLQVIKC+l7jwIUeZFLJMUJ8msM4pFYoGameeZmtjMbd/TNg + cVBfmZxNMHuLladJxvSo2esARo0TYPhYsgrREKoHwhpzSxdynjn4bOVkILfguwsN + qtEEMZFEv5Kb0GqRp2+Iagv2S6dg9JGvxVdsoGjaB6EbYSZ3Psx4aODasIn11uwo + X4B9vUQNXqc= + -----END X509 CRL----- + """.strip() + pem_req_data = b""" -----BEGIN CERTIFICATE REQUEST----- MIIC0zCCAbsCAQAwWTELMAkGA1UEBhMCVVMxETAPBgNVBAgMCElsbGlub2lzMRAw @@ -129,6 +144,51 @@ Loading Certificates >>> cert.serial 2 +Loading Certificate Revocation Lists +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +.. function:: load_pem_x509_crl(data, backend) + + .. versionadded:: 1.1 + + Deserialize a certificate revocation list (CRL) from PEM encoded data. PEM + requests are base64 decoded and have delimiters that look like + ``-----BEGIN X509 CRL-----``. + + :param bytes data: The PEM encoded request data. + + :param backend: A backend supporting the + :class:`~cryptography.hazmat.backends.interfaces.X509Backend` + interface. + + :returns: An instance of + :class:`~cryptography.x509.CertificateRevocationList`. + +.. function:: load_der_x509_crl(data, backend) + + .. versionadded:: 1.1 + + Deserialize a certificate revocation list (CRL) from DER encoded data. DER + is a binary format. + + :param bytes data: The DER encoded request data. + + :param backend: A backend supporting the + :class:`~cryptography.hazmat.backends.interfaces.X509Backend` + interface. + + :returns: An instance of + :class:`~cryptography.x509.CertificateRevocationList`. + +.. doctest:: + + >>> from cryptography import x509 + >>> from cryptography.hazmat.backends import default_backend + >>> from cryptography.hazmat.primitives import hashes + >>> crl = x509.load_pem_x509_crl(pem_crl_data, default_backend()) + >>> isinstance(crl.signature_hash_algorithm, hashes.SHA256) + True + Loading Certificate Signing Requests ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ @@ -340,6 +400,20 @@ X.509 CRL (Certificate Revocation List) Object .. versionadded:: 1.0 + A CertificateRevocationList is an object representing a list of revoked + certificates. The object is iterable and will yield the RevokedCertificate + objects stored in this CRL. + + .. doctest:: + + >>> len(crl) + 1 + >>> type(crl[0]) + <class 'cryptography.hazmat.backends.openssl.x509._RevokedCertificate'> + >>> for r in crl: + ... print(r.serial_number) + 0 + .. method:: fingerprint(algorithm) :param algorithm: The @@ -349,6 +423,12 @@ X.509 CRL (Certificate Revocation List) Object :return bytes: The fingerprint using the supplied hash algorithm, as bytes. + .. doctest:: + + >>> from cryptography.hazmat.primitives import hashes + >>> crl.fingerprint(hashes.SHA256()) + 'e\xcf.\xc4:\x83?1\xdc\xf3\xfc\x95\xd7\xb3\x87\xb3\x8e\xf8\xb93!\x87\x07\x9d\x1b\xb4!\xb9\xe4W\xf4\x1f' + .. attribute:: signature_hash_algorithm :type: :class:`~cryptography.hazmat.primitives.hashes.HashAlgorithm` @@ -357,12 +437,23 @@ X.509 CRL (Certificate Revocation List) Object :class:`~cryptography.hazmat.primitives.hashes.HashAlgorithm` which was used in signing this CRL. + .. doctest:: + + >>> from cryptography.hazmat.primitives import hashes + >>> isinstance(crl.signature_hash_algorithm, hashes.SHA256) + True + .. attribute:: issuer :type: :class:`Name` The :class:`Name` of the issuer. + .. doctest:: + + >>> crl.issuer + <Name([<NameAttribute(oid=<ObjectIdentifier(oid=2.5.4.6, name=countryName)>, value=u'US')>, <NameAttribute(oid=<ObjectIdentifier(oid=2.5.4.3, name=commonName)>, value=u'cryptography.io')>])> + .. attribute:: next_update :type: :class:`datetime.datetime` @@ -370,17 +461,21 @@ X.509 CRL (Certificate Revocation List) Object A naïve datetime representing when the next update to this CRL is expected. + .. doctest:: + + >>> crl.next_update + datetime.datetime(2016, 1, 1, 0, 0) + .. attribute:: last_update :type: :class:`datetime.datetime` A naïve datetime representing when the this CRL was last updated. - .. attribute:: revoked_certificates - - :type: list of :class:`RevokedCertificate` + .. doctest:: - The revoked certificates listed in this CRL. + >>> crl.last_update + datetime.datetime(2015, 1, 1, 0, 0) .. attribute:: extensions @@ -605,24 +700,45 @@ X.509 Revoked Certificate Object .. versionadded:: 1.0 + .. doctest:: + + >>> revoked_certificate = crl[0] + .. attribute:: serial_number :type: :class:`int` An integer representing the serial number of the revoked certificate. + .. doctest:: + + >>> revoked_certificate.serial_number + 0 + .. attribute:: revocation_date :type: :class:`datetime.datetime` A naïve datetime representing the date this certificates was revoked. + .. doctest:: + + >>> revoked_certificate.revocation_date + datetime.datetime(2015, 1, 1, 0, 0) + .. attribute:: extensions :type: :class:`Extensions` The extensions encoded in the revoked certificate. + .. doctest:: + + >>> for ext in revoked_certificate.extensions: + ... print(ext) + <Extension(oid=<ObjectIdentifier(oid=2.5.29.24, name=invalidityDate)>, critical=False, value=2015-01-01 00:00:00)> + <Extension(oid=<ObjectIdentifier(oid=2.5.29.21, name=cRLReason)>, critical=False, value=ReasonFlags.key_compromise)> + X.509 CSR (Certificate Signing Request) Builder Object ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ diff --git a/src/cryptography/hazmat/backends/multibackend.py b/src/cryptography/hazmat/backends/multibackend.py index c4d2c133..bbaaf424 100644 --- a/src/cryptography/hazmat/backends/multibackend.py +++ b/src/cryptography/hazmat/backends/multibackend.py @@ -331,6 +331,24 @@ class MultiBackend(object): _Reasons.UNSUPPORTED_X509 ) + def load_pem_x509_crl(self, data): + for b in self._filtered_backends(X509Backend): + return b.load_pem_x509_crl(data) + + raise UnsupportedAlgorithm( + "This backend does not support X.509.", + _Reasons.UNSUPPORTED_X509 + ) + + def load_der_x509_crl(self, data): + for b in self._filtered_backends(X509Backend): + return b.load_der_x509_crl(data) + + raise UnsupportedAlgorithm( + "This backend does not support X.509.", + _Reasons.UNSUPPORTED_X509 + ) + def load_der_x509_csr(self, data): for b in self._filtered_backends(X509Backend): return b.load_der_x509_csr(data) diff --git a/src/cryptography/hazmat/backends/openssl/backend.py b/src/cryptography/hazmat/backends/openssl/backend.py index f86c3aa1..58587b94 100644 --- a/src/cryptography/hazmat/backends/openssl/backend.py +++ b/src/cryptography/hazmat/backends/openssl/backend.py @@ -37,8 +37,8 @@ from cryptography.hazmat.backends.openssl.rsa import ( _RSAPrivateKey, _RSAPublicKey ) from cryptography.hazmat.backends.openssl.x509 import ( - _Certificate, _CertificateSigningRequest, _DISTPOINT_TYPE_FULLNAME, - _DISTPOINT_TYPE_RELATIVENAME + _Certificate, _CertificateRevocationList, _CertificateSigningRequest, + _DISTPOINT_TYPE_FULLNAME, _DISTPOINT_TYPE_RELATIVENAME ) from cryptography.hazmat.bindings.openssl import binding from cryptography.hazmat.primitives import hashes, serialization @@ -1452,6 +1452,28 @@ class Backend(object): x509 = self._ffi.gc(x509, self._lib.X509_free) return _Certificate(self, x509) + def load_pem_x509_crl(self, data): + mem_bio = self._bytes_to_bio(data) + x509_crl = self._lib.PEM_read_bio_X509_CRL( + mem_bio.bio, self._ffi.NULL, self._ffi.NULL, self._ffi.NULL + ) + if x509_crl == self._ffi.NULL: + self._consume_errors() + raise ValueError("Unable to load CRL") + + x509_crl = self._ffi.gc(x509_crl, self._lib.X509_CRL_free) + return _CertificateRevocationList(self, x509_crl) + + def load_der_x509_crl(self, data): + mem_bio = self._bytes_to_bio(data) + x509_crl = self._lib.d2i_X509_CRL_bio(mem_bio.bio, self._ffi.NULL) + if x509_crl == self._ffi.NULL: + self._consume_errors() + raise ValueError("Unable to load CRL") + + x509_crl = self._ffi.gc(x509_crl, self._lib.X509_CRL_free) + return _CertificateRevocationList(self, x509_crl) + def load_pem_x509_csr(self, data): mem_bio = self._bytes_to_bio(data) x509_req = self._lib.PEM_read_bio_X509_REQ( diff --git a/src/cryptography/hazmat/backends/openssl/x509.py b/src/cryptography/hazmat/backends/openssl/x509.py index 2de5a8c7..2790ec7d 100644 --- a/src/cryptography/hazmat/backends/openssl/x509.py +++ b/src/cryptography/hazmat/backends/openssl/x509.py @@ -4,7 +4,9 @@ from __future__ import absolute_import, division, print_function +import datetime import ipaddress + from email.utils import parseaddr import idna @@ -16,7 +18,9 @@ from six.moves import urllib_parse from cryptography import utils, x509 from cryptography.exceptions import UnsupportedAlgorithm from cryptography.hazmat.primitives import hashes, serialization -from cryptography.x509.oid import CertificatePoliciesOID, ExtensionOID +from cryptography.x509.oid import ( + CRLExtensionOID, CertificatePoliciesOID, ExtensionOID +) def _obj2txt(backend, obj): @@ -176,10 +180,11 @@ def _decode_ocsp_no_check(backend, ext): class _X509ExtensionParser(object): - def __init__(self, ext_count, get_ext, handlers): + def __init__(self, ext_count, get_ext, handlers, unsupported_exts=None): self.ext_count = ext_count self.get_ext = get_ext self.handlers = handlers + self.unsupported_exts = unsupported_exts def parse(self, backend, x509_obj): extensions = [] @@ -199,18 +204,25 @@ class _X509ExtensionParser(object): except KeyError: if critical: raise x509.UnsupportedExtension( - "{0} is not currently supported".format(oid), oid + "Critical extension {0} is not currently supported" + .format(oid), oid ) else: - d2i = backend._lib.X509V3_EXT_d2i(ext) - if d2i == backend._ffi.NULL: - backend._consume_errors() - raise ValueError( - "The {0} extension is invalid and can't be " - "parsed".format(oid) - ) - - value = handler(backend, d2i) + # For extensions which are not supported by OpenSSL we pass the + # extension object directly to the parsing routine so it can + # be decoded manually. + if self.unsupported_exts and oid in self.unsupported_exts: + ext_data = ext + else: + ext_data = backend._lib.X509V3_EXT_d2i(ext) + if ext_data == backend._ffi.NULL: + backend._consume_errors() + raise ValueError( + "The {0} extension is invalid and can't be " + "parsed".format(oid) + ) + + value = handler(backend, ext_data) extensions.append(x509.Extension(oid, critical, value)) seen_oids.add(oid) @@ -646,6 +658,175 @@ def _decode_inhibit_any_policy(backend, asn1_int): return x509.InhibitAnyPolicy(skip_certs) +def _decode_crl_reason(backend, enum): + enum = backend._ffi.cast("ASN1_ENUMERATED *", enum) + enum = backend._ffi.gc(enum, backend._lib.ASN1_ENUMERATED_free) + code = backend._lib.ASN1_ENUMERATED_get(enum) + + try: + return { + 0: x509.ReasonFlags.unspecified, + 1: x509.ReasonFlags.key_compromise, + 2: x509.ReasonFlags.ca_compromise, + 3: x509.ReasonFlags.affiliation_changed, + 4: x509.ReasonFlags.superseded, + 5: x509.ReasonFlags.cessation_of_operation, + 6: x509.ReasonFlags.certificate_hold, + 8: x509.ReasonFlags.remove_from_crl, + 9: x509.ReasonFlags.privilege_withdrawn, + 10: x509.ReasonFlags.aa_compromise, + }[code] + except KeyError: + raise ValueError("Unsupported reason code: {0}".format(code)) + + +def _decode_invalidity_date(backend, inv_date): + generalized_time = backend._ffi.cast( + "ASN1_GENERALIZEDTIME *", inv_date + ) + generalized_time = backend._ffi.gc( + generalized_time, backend._lib.ASN1_GENERALIZEDTIME_free + ) + time = backend._ffi.string( + backend._lib.ASN1_STRING_data( + backend._ffi.cast("ASN1_STRING *", generalized_time) + ) + ).decode("ascii") + return datetime.datetime.strptime(time, "%Y%m%d%H%M%SZ") + + +def _decode_cert_issuer(backend, ext): + """ + This handler decodes the CertificateIssuer entry extension directly + from the X509_EXTENSION object. This is necessary because this entry + extension is not directly supported by OpenSSL 0.9.8. + """ + + data_ptr_ptr = backend._ffi.new("const unsigned char **") + data_ptr_ptr[0] = ext.value.data + gns = backend._lib.d2i_GENERAL_NAMES( + backend._ffi.NULL, data_ptr_ptr, ext.value.length + ) + + # Check the result of d2i_GENERAL_NAMES() is valid. Usually this is covered + # in _X509ExtensionParser but since we are responsible for decoding this + # entry extension ourselves, we have to this here. + if gns == backend._ffi.NULL: + backend._consume_errors() + raise ValueError( + "The {0} extension is corrupted and can't be parsed".format( + CRLExtensionOID.CERTIFICATE_ISSUER)) + + gns = backend._ffi.gc(gns, backend._lib.GENERAL_NAMES_free) + return x509.GeneralNames(_decode_general_names(backend, gns)) + + +@utils.register_interface(x509.RevokedCertificate) +class _RevokedCertificate(object): + def __init__(self, backend, x509_revoked): + self._backend = backend + self._x509_revoked = x509_revoked + + @property + def serial_number(self): + asn1_int = self._x509_revoked.serialNumber + self._backend.openssl_assert(asn1_int != self._backend._ffi.NULL) + return self._backend._asn1_integer_to_int(asn1_int) + + @property + def revocation_date(self): + return self._backend._parse_asn1_time( + self._x509_revoked.revocationDate) + + @property + def extensions(self): + return _REVOKED_CERTIFICATE_EXTENSION_PARSER.parse( + self._backend, self._x509_revoked + ) + + +@utils.register_interface(x509.CertificateRevocationList) +class _CertificateRevocationList(object): + def __init__(self, backend, x509_crl): + self._backend = backend + self._x509_crl = x509_crl + + def __eq__(self, other): + if not isinstance(other, x509.CertificateRevocationList): + return NotImplemented + + res = self._backend._lib.X509_CRL_cmp(self._x509_crl, other._x509_crl) + return res == 0 + + def __ne__(self, other): + return not self == other + + def fingerprint(self, algorithm): + h = hashes.Hash(algorithm, self._backend) + bio = self._backend._create_mem_bio() + res = self._backend._lib.i2d_X509_CRL_bio( + bio, self._x509_crl + ) + self._backend.openssl_assert(res == 1) + der = self._backend._read_mem_bio(bio) + h.update(der) + return h.finalize() + + @property + def signature_hash_algorithm(self): + oid = _obj2txt(self._backend, self._x509_crl.sig_alg.algorithm) + try: + return x509._SIG_OIDS_TO_HASH[oid] + except KeyError: + raise UnsupportedAlgorithm( + "Signature algorithm OID:{0} not recognized".format(oid) + ) + + @property + def issuer(self): + issuer = self._backend._lib.X509_CRL_get_issuer(self._x509_crl) + self._backend.openssl_assert(issuer != self._backend._ffi.NULL) + return _decode_x509_name(self._backend, issuer) + + @property + def next_update(self): + nu = self._backend._lib.X509_CRL_get_nextUpdate(self._x509_crl) + self._backend.openssl_assert(nu != self._backend._ffi.NULL) + return self._backend._parse_asn1_time(nu) + + @property + def last_update(self): + lu = self._backend._lib.X509_CRL_get_lastUpdate(self._x509_crl) + self._backend.openssl_assert(lu != self._backend._ffi.NULL) + return self._backend._parse_asn1_time(lu) + + def _revoked_certificates(self): + revoked = self._backend._lib.X509_CRL_get_REVOKED(self._x509_crl) + self._backend.openssl_assert(revoked != self._backend._ffi.NULL) + + num = self._backend._lib.sk_X509_REVOKED_num(revoked) + revoked_list = [] + for i in range(num): + r = self._backend._lib.sk_X509_REVOKED_value(revoked, i) + self._backend.openssl_assert(r != self._backend._ffi.NULL) + revoked_list.append(_RevokedCertificate(self._backend, r)) + + return revoked_list + + def __iter__(self): + return iter(self._revoked_certificates()) + + def __getitem__(self, idx): + return self._revoked_certificates()[idx] + + def __len__(self): + return len(self._revoked_certificates()) + + @property + def extensions(self): + raise NotImplementedError() + + @utils.register_interface(x509.CertificateSigningRequest) class _CertificateSigningRequest(object): def __init__(self, backend, x509_req): @@ -726,6 +907,15 @@ _EXTENSION_HANDLERS = { ExtensionOID.NAME_CONSTRAINTS: _decode_name_constraints, } +_REVOKED_EXTENSION_HANDLERS = { + CRLExtensionOID.CRL_REASON: _decode_crl_reason, + CRLExtensionOID.INVALIDITY_DATE: _decode_invalidity_date, + CRLExtensionOID.CERTIFICATE_ISSUER: _decode_cert_issuer, +} + +_REVOKED_UNSUPPORTED_EXTENSIONS = set([ + CRLExtensionOID.CERTIFICATE_ISSUER, +]) _CERTIFICATE_EXTENSION_PARSER = _X509ExtensionParser( ext_count=lambda backend, x: backend._lib.X509_get_ext_count(x), @@ -738,3 +928,10 @@ _CSR_EXTENSION_PARSER = _X509ExtensionParser( get_ext=lambda backend, x, i: backend._lib.sk_X509_EXTENSION_value(x, i), handlers=_EXTENSION_HANDLERS ) + +_REVOKED_CERTIFICATE_EXTENSION_PARSER = _X509ExtensionParser( + ext_count=lambda backend, x: backend._lib.X509_REVOKED_get_ext_count(x), + get_ext=lambda backend, x, i: backend._lib.X509_REVOKED_get_ext(x, i), + handlers=_REVOKED_EXTENSION_HANDLERS, + unsupported_exts=_REVOKED_UNSUPPORTED_EXTENSIONS +) diff --git a/src/cryptography/x509/__init__.py b/src/cryptography/x509/__init__.py index 1aa2598b..70e1d3da 100644 --- a/src/cryptography/x509/__init__.py +++ b/src/cryptography/x509/__init__.py @@ -8,8 +8,8 @@ from cryptography.x509.base import ( Certificate, CertificateBuilder, CertificateRevocationList, CertificateSigningRequest, CertificateSigningRequestBuilder, InvalidVersion, RevokedCertificate, - Version, load_der_x509_certificate, load_der_x509_csr, - load_pem_x509_certificate, load_pem_x509_csr, + Version, load_der_x509_certificate, load_der_x509_crl, load_der_x509_csr, + load_pem_x509_certificate, load_pem_x509_crl, load_pem_x509_csr, ) from cryptography.x509.extensions import ( AccessDescription, AuthorityInformationAccess, @@ -108,6 +108,8 @@ __all__ = [ "load_der_x509_certificate", "load_pem_x509_csr", "load_der_x509_csr", + "load_pem_x509_crl", + "load_der_x509_crl", "InvalidVersion", "DuplicateExtension", "UnsupportedExtension", diff --git a/src/cryptography/x509/base.py b/src/cryptography/x509/base.py index 27eafac6..01eadfcb 100644 --- a/src/cryptography/x509/base.py +++ b/src/cryptography/x509/base.py @@ -40,6 +40,14 @@ def load_der_x509_csr(data, backend): return backend.load_der_x509_csr(data) +def load_pem_x509_crl(data, backend): + return backend.load_pem_x509_crl(data) + + +def load_der_x509_crl(data, backend): + return backend.load_der_x509_crl(data) + + class InvalidVersion(Exception): def __init__(self, msg, parsed_version): super(InvalidVersion, self).__init__(msg) @@ -169,12 +177,6 @@ class CertificateRevocationList(object): """ @abc.abstractproperty - def revoked_certificates(self): - """ - Returns a list of RevokedCertificate objects for this CRL. - """ - - @abc.abstractproperty def extensions(self): """ Returns an Extensions object containing a list of CRL extensions. diff --git a/tests/hazmat/backends/test_multibackend.py b/tests/hazmat/backends/test_multibackend.py index 2a533750..81a64ce0 100644 --- a/tests/hazmat/backends/test_multibackend.py +++ b/tests/hazmat/backends/test_multibackend.py @@ -200,6 +200,12 @@ class DummyX509Backend(object): def load_der_x509_certificate(self, data): pass + def load_pem_x509_crl(self, data): + pass + + def load_der_x509_crl(self, data): + pass + def load_pem_x509_csr(self, data): pass @@ -502,6 +508,8 @@ class TestMultiBackend(object): backend.load_pem_x509_certificate(b"certdata") backend.load_der_x509_certificate(b"certdata") + backend.load_pem_x509_crl(b"crldata") + backend.load_der_x509_crl(b"crldata") backend.load_pem_x509_csr(b"reqdata") backend.load_der_x509_csr(b"reqdata") backend.create_x509_csr(object(), b"privatekey", hashes.SHA1()) @@ -513,6 +521,10 @@ class TestMultiBackend(object): with raises_unsupported_algorithm(_Reasons.UNSUPPORTED_X509): backend.load_der_x509_certificate(b"certdata") with raises_unsupported_algorithm(_Reasons.UNSUPPORTED_X509): + backend.load_pem_x509_crl(b"crldata") + with raises_unsupported_algorithm(_Reasons.UNSUPPORTED_X509): + backend.load_der_x509_crl(b"crldata") + with raises_unsupported_algorithm(_Reasons.UNSUPPORTED_X509): backend.load_pem_x509_csr(b"reqdata") with raises_unsupported_algorithm(_Reasons.UNSUPPORTED_X509): backend.load_der_x509_csr(b"reqdata") diff --git a/tests/test_x509.py b/tests/test_x509.py index 8035886c..e6358056 100644 --- a/tests/test_x509.py +++ b/tests/test_x509.py @@ -52,6 +52,255 @@ def _load_cert(filename, loader, backend): return cert +@pytest.mark.requires_backend_interface(interface=X509Backend) +class TestCertificateRevocationList(object): + def test_load_pem_crl(self, backend): + crl = _load_cert( + os.path.join("x509", "custom", "crl_all_reasons.pem"), + x509.load_pem_x509_crl, + backend + ) + + assert isinstance(crl, x509.CertificateRevocationList) + fingerprint = binascii.hexlify(crl.fingerprint(hashes.SHA1())) + assert fingerprint == b"3234b0cb4c0cedf6423724b736729dcfc9e441ef" + assert isinstance(crl.signature_hash_algorithm, hashes.SHA256) + + def test_load_der_crl(self, backend): + crl = _load_cert( + os.path.join("x509", "PKITS_data", "crls", "GoodCACRL.crl"), + x509.load_der_x509_crl, + backend + ) + + assert isinstance(crl, x509.CertificateRevocationList) + fingerprint = binascii.hexlify(crl.fingerprint(hashes.SHA1())) + assert fingerprint == b"dd3db63c50f4c4a13e090f14053227cb1011a5ad" + assert isinstance(crl.signature_hash_algorithm, hashes.SHA256) + + def test_invalid_pem(self, backend): + with pytest.raises(ValueError): + x509.load_pem_x509_crl(b"notacrl", backend) + + def test_invalid_der(self, backend): + with pytest.raises(ValueError): + x509.load_der_x509_crl(b"notacrl", backend) + + def test_unknown_signature_algorithm(self, backend): + crl = _load_cert( + os.path.join( + "x509", "custom", "crl_md2_unknown_crit_entry_ext.pem" + ), + x509.load_pem_x509_crl, + backend + ) + + with pytest.raises(UnsupportedAlgorithm): + crl.signature_hash_algorithm() + + def test_issuer(self, backend): + crl = _load_cert( + os.path.join("x509", "PKITS_data", "crls", "GoodCACRL.crl"), + x509.load_der_x509_crl, + backend + ) + + assert isinstance(crl.issuer, x509.Name) + assert list(crl.issuer) == [ + x509.NameAttribute(x509.OID_COUNTRY_NAME, u'US'), + x509.NameAttribute( + x509.OID_ORGANIZATION_NAME, u'Test Certificates 2011' + ), + x509.NameAttribute(x509.OID_COMMON_NAME, u'Good CA') + ] + assert crl.issuer.get_attributes_for_oid(x509.OID_COMMON_NAME) == [ + x509.NameAttribute(x509.OID_COMMON_NAME, u'Good CA') + ] + + def test_equality(self, backend): + crl1 = _load_cert( + os.path.join("x509", "PKITS_data", "crls", "GoodCACRL.crl"), + x509.load_der_x509_crl, + backend + ) + + crl2 = _load_cert( + os.path.join("x509", "PKITS_data", "crls", "GoodCACRL.crl"), + x509.load_der_x509_crl, + backend + ) + + crl3 = _load_cert( + os.path.join("x509", "custom", "crl_all_reasons.pem"), + x509.load_pem_x509_crl, + backend + ) + + assert crl1 == crl2 + assert crl1 != crl3 + assert crl1 != object() + + def test_update_dates(self, backend): + crl = _load_cert( + os.path.join("x509", "custom", "crl_all_reasons.pem"), + x509.load_pem_x509_crl, + backend + ) + + assert isinstance(crl.next_update, datetime.datetime) + assert isinstance(crl.last_update, datetime.datetime) + + assert crl.next_update.isoformat() == "2016-01-01T00:00:00" + assert crl.last_update.isoformat() == "2015-01-01T00:00:00" + + def test_revoked_cert_retrieval(self, backend): + crl = _load_cert( + os.path.join("x509", "custom", "crl_all_reasons.pem"), + x509.load_pem_x509_crl, + backend + ) + + for r in crl: + assert isinstance(r, x509.RevokedCertificate) + + # Check that len() works for CRLs. + assert len(crl) == 12 + + def test_extensions(self, backend): + crl = _load_cert( + os.path.join("x509", "custom", "crl_all_reasons.pem"), + x509.load_pem_x509_crl, + backend + ) + + # CRL extensions are currently not supported in the OpenSSL backend. + with pytest.raises(NotImplementedError): + crl.extensions + + +@pytest.mark.requires_backend_interface(interface=X509Backend) +class TestRevokedCertificate(object): + + def test_revoked_basics(self, backend): + crl = _load_cert( + os.path.join("x509", "custom", "crl_all_reasons.pem"), + x509.load_pem_x509_crl, + backend + ) + + for i, rev in enumerate(crl): + assert isinstance(rev, x509.RevokedCertificate) + assert isinstance(rev.serial_number, int) + assert isinstance(rev.revocation_date, datetime.datetime) + assert isinstance(rev.extensions, x509.Extensions) + + assert rev.serial_number == i + assert rev.revocation_date.isoformat() == "2015-01-01T00:00:00" + + def test_revoked_extensions(self, backend): + crl = _load_cert( + os.path.join("x509", "custom", "crl_all_reasons.pem"), + x509.load_pem_x509_crl, + backend + ) + + exp_issuer = x509.GeneralNames([ + x509.DirectoryName(x509.Name([ + x509.NameAttribute(x509.OID_COUNTRY_NAME, u"US"), + x509.NameAttribute(x509.OID_COMMON_NAME, u"cryptography.io"), + ])) + ]) + + # First revoked cert doesn't have extensions, test if it is handled + # correctly. + rev0 = crl[0] + # It should return an empty Extensions object. + assert isinstance(rev0.extensions, x509.Extensions) + assert len(rev0.extensions) == 0 + with pytest.raises(x509.ExtensionNotFound): + rev0.extensions.get_extension_for_oid(x509.OID_CRL_REASON) + with pytest.raises(x509.ExtensionNotFound): + rev0.extensions.get_extension_for_oid(x509.OID_CERTIFICATE_ISSUER) + with pytest.raises(x509.ExtensionNotFound): + rev0.extensions.get_extension_for_oid(x509.OID_INVALIDITY_DATE) + + # Test manual retrieval of extension values. + rev1 = crl[1] + assert isinstance(rev1.extensions, x509.Extensions) + + reason = rev1.extensions.get_extension_for_oid( + x509.OID_CRL_REASON).value + assert reason == x509.ReasonFlags.unspecified + + issuer = rev1.extensions.get_extension_for_oid( + x509.OID_CERTIFICATE_ISSUER).value + assert issuer == exp_issuer + + date = rev1.extensions.get_extension_for_oid( + x509.OID_INVALIDITY_DATE).value + assert isinstance(date, datetime.datetime) + assert date.isoformat() == "2015-01-01T00:00:00" + + # Check if all reason flags can be found in the CRL. + flags = set(x509.ReasonFlags) + for rev in crl: + try: + r = rev.extensions.get_extension_for_oid(x509.OID_CRL_REASON) + except x509.ExtensionNotFound: + # Not all revoked certs have a reason extension. + pass + else: + flags.discard(r.value) + + assert len(flags) == 0 + + def test_duplicate_entry_ext(self, backend): + crl = _load_cert( + os.path.join("x509", "custom", "crl_dup_entry_ext.pem"), + x509.load_pem_x509_crl, + backend + ) + + with pytest.raises(x509.DuplicateExtension): + crl[0].extensions + + def test_unsupported_crit_entry_ext(self, backend): + crl = _load_cert( + os.path.join( + "x509", "custom", "crl_md2_unknown_crit_entry_ext.pem" + ), + x509.load_pem_x509_crl, + backend + ) + + with pytest.raises(x509.UnsupportedExtension): + crl[0].extensions + + def test_unsupported_reason(self, backend): + crl = _load_cert( + os.path.join( + "x509", "custom", "crl_unsupported_reason.pem" + ), + x509.load_pem_x509_crl, + backend + ) + + with pytest.raises(ValueError): + crl[0].extensions + + def test_invalid_cert_issuer_ext(self, backend): + crl = _load_cert( + os.path.join( + "x509", "custom", "crl_inval_cert_issuer_entry_ext.pem" + ), + x509.load_pem_x509_crl, + backend + ) + + with pytest.raises(ValueError): + crl[0].extensions + + @pytest.mark.requires_backend_interface(interface=RSABackend) @pytest.mark.requires_backend_interface(interface=X509Backend) class TestRSACertificate(object): |