547 lines
20 KiB
Python
547 lines
20 KiB
Python
# This file is dual licensed under the terms of the Apache License, Version
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# 2.0, and the BSD License. See the LICENSE file in the root of this repository
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# for complete details.
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from __future__ import absolute_import, division, print_function
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import datetime
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import operator
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from cryptography import utils, x509
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from cryptography.exceptions import UnsupportedAlgorithm
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from cryptography.hazmat.backends.openssl.decode_asn1 import (
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_CERTIFICATE_EXTENSION_PARSER, _CERTIFICATE_EXTENSION_PARSER_NO_SCT,
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_CRL_EXTENSION_PARSER, _CSR_EXTENSION_PARSER,
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_REVOKED_CERTIFICATE_EXTENSION_PARSER, _asn1_integer_to_int,
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_asn1_string_to_bytes, _decode_x509_name, _obj2txt, _parse_asn1_time
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)
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from cryptography.hazmat.backends.openssl.encode_asn1 import (
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_encode_asn1_int_gc
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)
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from cryptography.hazmat.primitives import hashes, serialization
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from cryptography.hazmat.primitives.asymmetric import dsa, ec, rsa
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@utils.register_interface(x509.Certificate)
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class _Certificate(object):
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def __init__(self, backend, x509):
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self._backend = backend
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self._x509 = x509
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def __repr__(self):
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return "<Certificate(subject={}, ...)>".format(self.subject)
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def __eq__(self, other):
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if not isinstance(other, x509.Certificate):
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return NotImplemented
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res = self._backend._lib.X509_cmp(self._x509, other._x509)
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return res == 0
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def __ne__(self, other):
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return not self == other
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def __hash__(self):
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return hash(self.public_bytes(serialization.Encoding.DER))
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def fingerprint(self, algorithm):
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h = hashes.Hash(algorithm, self._backend)
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h.update(self.public_bytes(serialization.Encoding.DER))
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return h.finalize()
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@property
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def version(self):
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version = self._backend._lib.X509_get_version(self._x509)
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if version == 0:
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return x509.Version.v1
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elif version == 2:
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return x509.Version.v3
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else:
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raise x509.InvalidVersion(
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"{} is not a valid X509 version".format(version), version
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)
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@property
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def serial_number(self):
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asn1_int = self._backend._lib.X509_get_serialNumber(self._x509)
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self._backend.openssl_assert(asn1_int != self._backend._ffi.NULL)
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return _asn1_integer_to_int(self._backend, asn1_int)
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def public_key(self):
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pkey = self._backend._lib.X509_get_pubkey(self._x509)
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if pkey == self._backend._ffi.NULL:
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# Remove errors from the stack.
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self._backend._consume_errors()
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raise ValueError("Certificate public key is of an unknown type")
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pkey = self._backend._ffi.gc(pkey, self._backend._lib.EVP_PKEY_free)
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return self._backend._evp_pkey_to_public_key(pkey)
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@property
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def not_valid_before(self):
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asn1_time = self._backend._lib.X509_getm_notBefore(self._x509)
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return _parse_asn1_time(self._backend, asn1_time)
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@property
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def not_valid_after(self):
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asn1_time = self._backend._lib.X509_getm_notAfter(self._x509)
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return _parse_asn1_time(self._backend, asn1_time)
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@property
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def issuer(self):
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issuer = self._backend._lib.X509_get_issuer_name(self._x509)
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self._backend.openssl_assert(issuer != self._backend._ffi.NULL)
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return _decode_x509_name(self._backend, issuer)
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@property
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def subject(self):
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subject = self._backend._lib.X509_get_subject_name(self._x509)
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self._backend.openssl_assert(subject != self._backend._ffi.NULL)
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return _decode_x509_name(self._backend, subject)
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@property
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def signature_hash_algorithm(self):
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oid = self.signature_algorithm_oid
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try:
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return x509._SIG_OIDS_TO_HASH[oid]
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except KeyError:
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raise UnsupportedAlgorithm(
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"Signature algorithm OID:{} not recognized".format(oid)
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)
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@property
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def signature_algorithm_oid(self):
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alg = self._backend._ffi.new("X509_ALGOR **")
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self._backend._lib.X509_get0_signature(
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self._backend._ffi.NULL, alg, self._x509
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)
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self._backend.openssl_assert(alg[0] != self._backend._ffi.NULL)
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oid = _obj2txt(self._backend, alg[0].algorithm)
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return x509.ObjectIdentifier(oid)
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@utils.cached_property
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def extensions(self):
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if self._backend._lib.CRYPTOGRAPHY_OPENSSL_110_OR_GREATER:
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return _CERTIFICATE_EXTENSION_PARSER.parse(
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self._backend, self._x509
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)
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else:
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return _CERTIFICATE_EXTENSION_PARSER_NO_SCT.parse(
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self._backend, self._x509
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)
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@property
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def signature(self):
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sig = self._backend._ffi.new("ASN1_BIT_STRING **")
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self._backend._lib.X509_get0_signature(
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sig, self._backend._ffi.NULL, self._x509
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)
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self._backend.openssl_assert(sig[0] != self._backend._ffi.NULL)
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return _asn1_string_to_bytes(self._backend, sig[0])
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@property
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def tbs_certificate_bytes(self):
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pp = self._backend._ffi.new("unsigned char **")
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res = self._backend._lib.i2d_re_X509_tbs(self._x509, pp)
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self._backend.openssl_assert(res > 0)
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pp = self._backend._ffi.gc(
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pp, lambda pointer: self._backend._lib.OPENSSL_free(pointer[0])
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)
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return self._backend._ffi.buffer(pp[0], res)[:]
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def public_bytes(self, encoding):
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bio = self._backend._create_mem_bio_gc()
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if encoding is serialization.Encoding.PEM:
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res = self._backend._lib.PEM_write_bio_X509(bio, self._x509)
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elif encoding is serialization.Encoding.DER:
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res = self._backend._lib.i2d_X509_bio(bio, self._x509)
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else:
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raise TypeError("encoding must be an item from the Encoding enum")
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self._backend.openssl_assert(res == 1)
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return self._backend._read_mem_bio(bio)
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@utils.register_interface(x509.RevokedCertificate)
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class _RevokedCertificate(object):
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def __init__(self, backend, crl, x509_revoked):
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self._backend = backend
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# The X509_REVOKED_value is a X509_REVOKED * that has
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# no reference counting. This means when X509_CRL_free is
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# called then the CRL and all X509_REVOKED * are freed. Since
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# you can retain a reference to a single revoked certificate
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# and let the CRL fall out of scope we need to retain a
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# private reference to the CRL inside the RevokedCertificate
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# object to prevent the gc from being called inappropriately.
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self._crl = crl
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self._x509_revoked = x509_revoked
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@property
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def serial_number(self):
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asn1_int = self._backend._lib.X509_REVOKED_get0_serialNumber(
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self._x509_revoked
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)
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self._backend.openssl_assert(asn1_int != self._backend._ffi.NULL)
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return _asn1_integer_to_int(self._backend, asn1_int)
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@property
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def revocation_date(self):
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return _parse_asn1_time(
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self._backend,
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self._backend._lib.X509_REVOKED_get0_revocationDate(
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self._x509_revoked
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)
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)
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@utils.cached_property
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def extensions(self):
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return _REVOKED_CERTIFICATE_EXTENSION_PARSER.parse(
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self._backend, self._x509_revoked
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)
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@utils.register_interface(x509.CertificateRevocationList)
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class _CertificateRevocationList(object):
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def __init__(self, backend, x509_crl):
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self._backend = backend
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self._x509_crl = x509_crl
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def __eq__(self, other):
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if not isinstance(other, x509.CertificateRevocationList):
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return NotImplemented
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res = self._backend._lib.X509_CRL_cmp(self._x509_crl, other._x509_crl)
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return res == 0
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def __ne__(self, other):
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return not self == other
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def fingerprint(self, algorithm):
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h = hashes.Hash(algorithm, self._backend)
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bio = self._backend._create_mem_bio_gc()
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res = self._backend._lib.i2d_X509_CRL_bio(
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bio, self._x509_crl
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)
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self._backend.openssl_assert(res == 1)
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der = self._backend._read_mem_bio(bio)
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h.update(der)
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return h.finalize()
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@utils.cached_property
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def _sorted_crl(self):
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# X509_CRL_get0_by_serial sorts in place, which breaks a variety of
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# things we don't want to break (like iteration and the signature).
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# Let's dupe it and sort that instead.
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dup = self._backend._lib.X509_CRL_dup(self._x509_crl)
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self._backend.openssl_assert(dup != self._backend._ffi.NULL)
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dup = self._backend._ffi.gc(dup, self._backend._lib.X509_CRL_free)
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return dup
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def get_revoked_certificate_by_serial_number(self, serial_number):
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revoked = self._backend._ffi.new("X509_REVOKED **")
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asn1_int = _encode_asn1_int_gc(self._backend, serial_number)
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res = self._backend._lib.X509_CRL_get0_by_serial(
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self._sorted_crl, revoked, asn1_int
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)
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if res == 0:
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return None
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else:
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self._backend.openssl_assert(
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revoked[0] != self._backend._ffi.NULL
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)
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return _RevokedCertificate(
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self._backend, self._sorted_crl, revoked[0]
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)
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@property
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def signature_hash_algorithm(self):
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oid = self.signature_algorithm_oid
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try:
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return x509._SIG_OIDS_TO_HASH[oid]
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except KeyError:
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raise UnsupportedAlgorithm(
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"Signature algorithm OID:{} not recognized".format(oid)
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)
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@property
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def signature_algorithm_oid(self):
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alg = self._backend._ffi.new("X509_ALGOR **")
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self._backend._lib.X509_CRL_get0_signature(
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self._x509_crl, self._backend._ffi.NULL, alg
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)
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self._backend.openssl_assert(alg[0] != self._backend._ffi.NULL)
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oid = _obj2txt(self._backend, alg[0].algorithm)
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return x509.ObjectIdentifier(oid)
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@property
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def issuer(self):
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issuer = self._backend._lib.X509_CRL_get_issuer(self._x509_crl)
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self._backend.openssl_assert(issuer != self._backend._ffi.NULL)
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return _decode_x509_name(self._backend, issuer)
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@property
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def next_update(self):
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nu = self._backend._lib.X509_CRL_get_nextUpdate(self._x509_crl)
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self._backend.openssl_assert(nu != self._backend._ffi.NULL)
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return _parse_asn1_time(self._backend, nu)
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@property
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def last_update(self):
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lu = self._backend._lib.X509_CRL_get_lastUpdate(self._x509_crl)
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self._backend.openssl_assert(lu != self._backend._ffi.NULL)
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return _parse_asn1_time(self._backend, lu)
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@property
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def signature(self):
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sig = self._backend._ffi.new("ASN1_BIT_STRING **")
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self._backend._lib.X509_CRL_get0_signature(
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self._x509_crl, sig, self._backend._ffi.NULL
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)
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self._backend.openssl_assert(sig[0] != self._backend._ffi.NULL)
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return _asn1_string_to_bytes(self._backend, sig[0])
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@property
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def tbs_certlist_bytes(self):
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pp = self._backend._ffi.new("unsigned char **")
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res = self._backend._lib.i2d_re_X509_CRL_tbs(self._x509_crl, pp)
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self._backend.openssl_assert(res > 0)
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pp = self._backend._ffi.gc(
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pp, lambda pointer: self._backend._lib.OPENSSL_free(pointer[0])
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)
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return self._backend._ffi.buffer(pp[0], res)[:]
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def public_bytes(self, encoding):
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bio = self._backend._create_mem_bio_gc()
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if encoding is serialization.Encoding.PEM:
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res = self._backend._lib.PEM_write_bio_X509_CRL(
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bio, self._x509_crl
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)
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elif encoding is serialization.Encoding.DER:
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res = self._backend._lib.i2d_X509_CRL_bio(bio, self._x509_crl)
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else:
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raise TypeError("encoding must be an item from the Encoding enum")
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self._backend.openssl_assert(res == 1)
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return self._backend._read_mem_bio(bio)
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def _revoked_cert(self, idx):
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revoked = self._backend._lib.X509_CRL_get_REVOKED(self._x509_crl)
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r = self._backend._lib.sk_X509_REVOKED_value(revoked, idx)
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self._backend.openssl_assert(r != self._backend._ffi.NULL)
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return _RevokedCertificate(self._backend, self, r)
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def __iter__(self):
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for i in range(len(self)):
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yield self._revoked_cert(i)
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def __getitem__(self, idx):
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if isinstance(idx, slice):
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start, stop, step = idx.indices(len(self))
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return [self._revoked_cert(i) for i in range(start, stop, step)]
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else:
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idx = operator.index(idx)
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if idx < 0:
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idx += len(self)
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if not 0 <= idx < len(self):
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raise IndexError
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return self._revoked_cert(idx)
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def __len__(self):
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revoked = self._backend._lib.X509_CRL_get_REVOKED(self._x509_crl)
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if revoked == self._backend._ffi.NULL:
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return 0
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else:
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return self._backend._lib.sk_X509_REVOKED_num(revoked)
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@utils.cached_property
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def extensions(self):
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return _CRL_EXTENSION_PARSER.parse(self._backend, self._x509_crl)
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def is_signature_valid(self, public_key):
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if not isinstance(public_key, (dsa.DSAPublicKey, rsa.RSAPublicKey,
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ec.EllipticCurvePublicKey)):
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raise TypeError('Expecting one of DSAPublicKey, RSAPublicKey,'
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' or EllipticCurvePublicKey.')
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res = self._backend._lib.X509_CRL_verify(
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self._x509_crl, public_key._evp_pkey
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)
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if res != 1:
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self._backend._consume_errors()
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return False
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return True
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@utils.register_interface(x509.CertificateSigningRequest)
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class _CertificateSigningRequest(object):
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def __init__(self, backend, x509_req):
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self._backend = backend
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self._x509_req = x509_req
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def __eq__(self, other):
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if not isinstance(other, _CertificateSigningRequest):
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return NotImplemented
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self_bytes = self.public_bytes(serialization.Encoding.DER)
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other_bytes = other.public_bytes(serialization.Encoding.DER)
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return self_bytes == other_bytes
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def __ne__(self, other):
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return not self == other
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def __hash__(self):
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return hash(self.public_bytes(serialization.Encoding.DER))
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def public_key(self):
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pkey = self._backend._lib.X509_REQ_get_pubkey(self._x509_req)
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self._backend.openssl_assert(pkey != self._backend._ffi.NULL)
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pkey = self._backend._ffi.gc(pkey, self._backend._lib.EVP_PKEY_free)
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return self._backend._evp_pkey_to_public_key(pkey)
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@property
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def subject(self):
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subject = self._backend._lib.X509_REQ_get_subject_name(self._x509_req)
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self._backend.openssl_assert(subject != self._backend._ffi.NULL)
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return _decode_x509_name(self._backend, subject)
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@property
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def signature_hash_algorithm(self):
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oid = self.signature_algorithm_oid
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try:
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return x509._SIG_OIDS_TO_HASH[oid]
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except KeyError:
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raise UnsupportedAlgorithm(
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"Signature algorithm OID:{} not recognized".format(oid)
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)
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@property
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def signature_algorithm_oid(self):
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alg = self._backend._ffi.new("X509_ALGOR **")
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self._backend._lib.X509_REQ_get0_signature(
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self._x509_req, self._backend._ffi.NULL, alg
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)
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self._backend.openssl_assert(alg[0] != self._backend._ffi.NULL)
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oid = _obj2txt(self._backend, alg[0].algorithm)
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return x509.ObjectIdentifier(oid)
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@utils.cached_property
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def extensions(self):
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x509_exts = self._backend._lib.X509_REQ_get_extensions(self._x509_req)
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x509_exts = self._backend._ffi.gc(
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x509_exts,
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lambda x: self._backend._lib.sk_X509_EXTENSION_pop_free(
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x, self._backend._ffi.addressof(
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self._backend._lib._original_lib, "X509_EXTENSION_free"
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)
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)
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)
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return _CSR_EXTENSION_PARSER.parse(self._backend, x509_exts)
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def public_bytes(self, encoding):
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bio = self._backend._create_mem_bio_gc()
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if encoding is serialization.Encoding.PEM:
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res = self._backend._lib.PEM_write_bio_X509_REQ(
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bio, self._x509_req
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)
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elif encoding is serialization.Encoding.DER:
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res = self._backend._lib.i2d_X509_REQ_bio(bio, self._x509_req)
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else:
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raise TypeError("encoding must be an item from the Encoding enum")
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self._backend.openssl_assert(res == 1)
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return self._backend._read_mem_bio(bio)
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@property
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def tbs_certrequest_bytes(self):
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pp = self._backend._ffi.new("unsigned char **")
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res = self._backend._lib.i2d_re_X509_REQ_tbs(self._x509_req, pp)
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self._backend.openssl_assert(res > 0)
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pp = self._backend._ffi.gc(
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pp, lambda pointer: self._backend._lib.OPENSSL_free(pointer[0])
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|
)
|
|
return self._backend._ffi.buffer(pp[0], res)[:]
|
|
|
|
@property
|
|
def signature(self):
|
|
sig = self._backend._ffi.new("ASN1_BIT_STRING **")
|
|
self._backend._lib.X509_REQ_get0_signature(
|
|
self._x509_req, sig, self._backend._ffi.NULL
|
|
)
|
|
self._backend.openssl_assert(sig[0] != self._backend._ffi.NULL)
|
|
return _asn1_string_to_bytes(self._backend, sig[0])
|
|
|
|
@property
|
|
def is_signature_valid(self):
|
|
pkey = self._backend._lib.X509_REQ_get_pubkey(self._x509_req)
|
|
self._backend.openssl_assert(pkey != self._backend._ffi.NULL)
|
|
pkey = self._backend._ffi.gc(pkey, self._backend._lib.EVP_PKEY_free)
|
|
res = self._backend._lib.X509_REQ_verify(self._x509_req, pkey)
|
|
|
|
if res != 1:
|
|
self._backend._consume_errors()
|
|
return False
|
|
|
|
return True
|
|
|
|
|
|
@utils.register_interface(
|
|
x509.certificate_transparency.SignedCertificateTimestamp
|
|
)
|
|
class _SignedCertificateTimestamp(object):
|
|
def __init__(self, backend, sct_list, sct):
|
|
self._backend = backend
|
|
# Keep the SCT_LIST that this SCT came from alive.
|
|
self._sct_list = sct_list
|
|
self._sct = sct
|
|
|
|
@property
|
|
def version(self):
|
|
version = self._backend._lib.SCT_get_version(self._sct)
|
|
assert version == self._backend._lib.SCT_VERSION_V1
|
|
return x509.certificate_transparency.Version.v1
|
|
|
|
@property
|
|
def log_id(self):
|
|
out = self._backend._ffi.new("unsigned char **")
|
|
log_id_length = self._backend._lib.SCT_get0_log_id(self._sct, out)
|
|
assert log_id_length >= 0
|
|
return self._backend._ffi.buffer(out[0], log_id_length)[:]
|
|
|
|
@property
|
|
def timestamp(self):
|
|
timestamp = self._backend._lib.SCT_get_timestamp(self._sct)
|
|
milliseconds = timestamp % 1000
|
|
return datetime.datetime.utcfromtimestamp(
|
|
timestamp // 1000
|
|
).replace(microsecond=milliseconds * 1000)
|
|
|
|
@property
|
|
def entry_type(self):
|
|
entry_type = self._backend._lib.SCT_get_log_entry_type(self._sct)
|
|
# We currently only support loading SCTs from the X.509 extension, so
|
|
# we only have precerts.
|
|
assert entry_type == self._backend._lib.CT_LOG_ENTRY_TYPE_PRECERT
|
|
return x509.certificate_transparency.LogEntryType.PRE_CERTIFICATE
|
|
|
|
@property
|
|
def _signature(self):
|
|
ptrptr = self._backend._ffi.new("unsigned char **")
|
|
res = self._backend._lib.SCT_get0_signature(self._sct, ptrptr)
|
|
self._backend.openssl_assert(res > 0)
|
|
self._backend.openssl_assert(ptrptr[0] != self._backend._ffi.NULL)
|
|
return self._backend._ffi.buffer(ptrptr[0], res)[:]
|
|
|
|
def __hash__(self):
|
|
return hash(self._signature)
|
|
|
|
def __eq__(self, other):
|
|
if not isinstance(other, _SignedCertificateTimestamp):
|
|
return NotImplemented
|
|
|
|
return self._signature == other._signature
|
|
|
|
def __ne__(self, other):
|
|
return not self == other
|