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  #   	ˆl–Ãa¾”ªeJu@·pÜlJbÑ¿¿„o¯ÃÂ =¼    	# 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 operator
import warnings

from cryptography import utils, x509
from cryptography.exceptions import UnsupportedAlgorithm
from cryptography.hazmat.backends.openssl.decode_asn1 import (
    _CERTIFICATE_EXTENSION_PARSER, _CRL_EXTENSION_PARSER,
    _CSR_EXTENSION_PARSER, _REVOKED_CERTIFICATE_EXTENSION_PARSER,
    _asn1_integer_to_int, _asn1_string_to_bytes, _decode_x509_name, _obj2txt,
    _parse_asn1_time
)
from cryptography.hazmat.primitives import hashes, serialization


@utils.register_interface(x509.Certificate)
class _Certificate(object):
    def __init__(self, backend, x509):
        self._backend = backend
        self._x509 = x509

    def __repr__(self):
        return "<Certificate(subject={0}, ...)>".format(self.subject)

    def __eq__(self, other):
        if not isinstance(other, x509.Certificate):
            return NotImplemented

        res = self._backend._lib.X509_cmp(self._x509, other._x509)
        return res == 0

    def __ne__(self, other):
        return not self == other

    def __hash__(self):
        return hash(self.public_bytes(serialization.Encoding.DER))

    def fingerprint(self, algorithm):
        h = hashes.Hash(algorithm, self._backend)
        h.update(self.public_bytes(serialization.Encoding.DER))
        return h.finalize()

    @property
    def version(self):
        version = self._backend._lib.X509_get_version(self._x509)
        if version == 0:
            return x509.Version.v1
        elif version == 2:
            return x509.Version.v3
        else:
            raise x509.InvalidVersion(
                "{0} is not a valid X509 version".format(version), version
            )

    @property
    def serial(self):
        warnings.warn(
            "Certificate serial is deprecated, use serial_number instead.",
            utils.DeprecatedIn14,
            stacklevel=2
        )
        return self.serial_number

    @property
    def serial_number(self):
        asn1_int = self._backend._lib.X509_get_serialNumber(self._x509)
        self._backend.openssl_assert(asn1_int != self._backend._ffi.NULL)
        return _asn1_integer_to_int(self._backend, asn1_int)

    def public_key(self):
        pkey = self._backend._lib.X509_get_pubkey(self._x509)
        if pkey == self._backend._ffi.NULL:
            # Remove errors from the stack.
            self._backend._consume_errors()
            raise ValueError("Certificate public key is of an unknown type")

        pkey = self._backend._ffi.gc(pkey, self._backend._lib.EVP_PKEY_free)

        return self._backend._evp_pkey_to_public_key(pkey)

    @property
    def not_valid_before(self):
        asn1_time = self._backend._lib.X509_get_notBefore(self._x509)
        return _parse_asn1_time(self._backend, asn1_time)

    @property
    def not_valid_after(self):
        asn1_time = self._backend._lib.X509_get_notAfter(self._x509)
        return _parse_asn1_time(self._backend, asn1_time)

    @property
    def issuer(self):
        issuer = self._backend._lib.X509_get_issuer_name(self._x509)
        self._backend.openssl_assert(issuer != self._backend._ffi.NULL)
        return _decode_x509_name(self._backend, issuer)

    @property
    def subject(self):
        subject = self._backend._lib.X509_get_subject_name(self._x509)
        self._backend.openssl_assert(subject != self._backend._ffi.NULL)
        return _decode_x509_name(self._backend, subject)

    @property
    def signature_hash_algorithm(self):
        oid = self.signature_algorithm_oid
        try:
            return x509._SIG_OIDS_TO_HASH[oid]
        except KeyError:
            raise UnsupportedAlgorithm(
                "Signature algorithm OID:{0} not recognized".format(oid)
            )

    @property
    def signature_algorithm_oid(self):
        alg = self._ba