Python ssl.OP_NO_COMPRESSION属性代码示例

# 需要导入模块: import ssl [as 别名]
# 或者: from ssl import OP_NO_COMPRESSION [as 别名]
def _get_ssl_options(self, scheme):
        if scheme == "https":
            if self.request.ssl_options is not None:
                return self.request.ssl_options
            # If we are using the defaults, don't construct a
            # new SSLContext.
            if (self.request.validate_cert and
                    self.request.ca_certs is None and
                    self.request.client_cert is None and
                    self.request.client_key is None):
                return _client_ssl_defaults
            ssl_ctx = ssl.create_default_context(
                ssl.Purpose.SERVER_AUTH,
                cafile=self.request.ca_certs)
            if not self.request.validate_cert:
                ssl_ctx.check_hostname = False
                ssl_ctx.verify_mode = ssl.CERT_NONE
            if self.request.client_cert is not None:
                ssl_ctx.load_cert_chain(self.request.client_cert,
                                        self.request.client_key)
            if hasattr(ssl, 'OP_NO_COMPRESSION'):
                # See netutil.ssl_options_to_context
                ssl_ctx.options |= ssl.OP_NO_COMPRESSION
            return ssl_ctx
        return None 

# 需要导入模块: import ssl [as 别名]
# 或者: from ssl import OP_NO_COMPRESSION [as 别名]
def create_ssl_context(self) -> Optional[SSLContext]:
        if not self.ssl_enabled:
            return None

        context = ssl.create_default_context(ssl.Purpose.CLIENT_AUTH)
        context.set_ciphers(self.ciphers)
        cipher_opts = 0
        for attr in ["OP_NO_SSLv2", "OP_NO_SSLv3", "OP_NO_TLSv1", "OP_NO_TLSv1_1"]:
            if hasattr(ssl, attr):  # To be future proof
                cipher_opts |= getattr(ssl, attr)
        context.options |= cipher_opts  # RFC 7540 Section 9.2: MUST be TLS >=1.2
        context.options |= ssl.OP_NO_COMPRESSION  # RFC 7540 Section 9.2.1: MUST disable compression
        context.set_alpn_protocols(self.alpn_protocols)

        if self.certfile is not None and self.keyfile is not None:
            context.load_cert_chain(certfile=self.certfile, keyfile=self.keyfile)

        if self.ca_certs is not None:
            context.load_verify_locations(self.ca_certs)
        if self.verify_mode is not None:
            context.verify_mode = self.verify_mode
        if self.verify_flags is not None:
            context.verify_flags = self.verify_flags

        return context 

# 需要导入模块: import ssl [as 别名]
# 或者: from ssl import OP_NO_COMPRESSION [as 别名]
def get_http2_ssl_context():
    """
    This function creates an SSLContext object that is suitably configured for
    HTTP/2. If you're working with Python TLS directly, you'll want to do the
    exact same setup as this function does.
    """
    # Get the basic context from the standard library.
    ctx = ssl.create_default_context(purpose=ssl.Purpose.CLIENT_AUTH)

    # RFC 7540 Section 9.2: Implementations of HTTP/2 MUST use TLS version 1.2
    # or higher. Disable TLS 1.1 and lower.
    ctx.options |= (
        ssl.OP_NO_SSLv2 | ssl.OP_NO_SSLv3 | ssl.OP_NO_TLSv1 | ssl.OP_NO_TLSv1_1
    )

    # RFC 7540 Section 9.2.1: A deployment of HTTP/2 over TLS 1.2 MUST disable
    # compression.
    ctx.options |= ssl.OP_NO_COMPRESSION

    # RFC 7540 Section 9.2.2: "deployments of HTTP/2 that use TLS 1.2 MUST
    # support TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256". In practice, the
    # blocklist defined in this section allows only the AES GCM and ChaCha20
    # cipher suites with ephemeral key negotiation.
    ctx.set_ciphers("ECDHE+AESGCM:ECDHE+CHACHA20:DHE+AESGCM:DHE+CHACHA20")

    # We want to negotiate using NPN and ALPN. ALPN is mandatory, but NPN may
    # be absent, so allow that. This setup allows for negotiation of HTTP/1.1.
    ctx.set_alpn_protocols(["h2", "http/1.1"])

    try:
        ctx.set_npn_protocols(["h2", "http/1.1"])
    except NotImplementedError:
        pass

    return ctx 

# 需要导入模块: import ssl [as 别名]
# 或者: from ssl import OP_NO_COMPRESSION [as 别名]
def get_http2_ssl_context():
    """
    This function creates an SSLContext object that is suitably configured for
    HTTP/2. If you're working with Python TLS directly, you'll want to do the
    exact same setup as this function does.
    """
    # Get the basic context from the standard library.
    ctx = ssl.create_default_context(purpose=ssl.Purpose.SERVER_AUTH)

    # RFC 7540 Section 9.2: Implementations of HTTP/2 MUST use TLS version 1.2
    # or higher. Disable TLS 1.1 and lower.
    ctx.options |= (
        ssl.OP_NO_SSLv2 | ssl.OP_NO_SSLv3 | ssl.OP_NO_TLSv1 | ssl.OP_NO_TLSv1_1
    )

    # RFC 7540 Section 9.2.1: A deployment of HTTP/2 over TLS 1.2 MUST disable
    # compression.
    ctx.options |= ssl.OP_NO_COMPRESSION

    # RFC 7540 Section 9.2.2: "deployments of HTTP/2 that use TLS 1.2 MUST
    # support TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256". In practice, the
    # blocklist defined in this section allows only the AES GCM and ChaCha20
    # cipher suites with ephemeral key negotiation.
    ctx.set_ciphers("ECDHE+AESGCM:ECDHE+CHACHA20:DHE+AESGCM:DHE+CHACHA20")

    # We want to negotiate using NPN and ALPN. ALPN is mandatory, but NPN may
    # be absent, so allow that. This setup allows for negotiation of HTTP/1.1.
    ctx.set_alpn_protocols(["h2", "http/1.1"])

    try:
        ctx.set_npn_protocols(["h2", "http/1.1"])
    except NotImplementedError:
        pass

    return ctx 

# 需要导入模块: import ssl [as 别名]
# 或者: from ssl import OP_NO_COMPRESSION [as 别名]
def create_ssl_context(certfile, keyfile):
    ssl_context = ssl.create_default_context(ssl.Purpose.CLIENT_AUTH)
    ssl_context.options |= (
        ssl.OP_NO_TLSv1 | ssl.OP_NO_TLSv1_1 | ssl.OP_NO_COMPRESSION
    )
    ssl_context.set_ciphers("ECDHE+AESGCM")
    ssl_context.load_cert_chain(certfile=certfile, keyfile=keyfile)
    ssl_context.set_alpn_protocols(["h2"])
    return ssl_context 

# 需要导入模块: import ssl [as 别名]
# 或者: from ssl import OP_NO_COMPRESSION [as 别名]
def ssl_options_to_context(ssl_options):
    """Try to convert an ``ssl_options`` dictionary to an
    `~ssl.SSLContext` object.

    The ``ssl_options`` dictionary contains keywords to be passed to
    `ssl.wrap_socket`.  In Python 2.7.9+, `ssl.SSLContext` objects can
    be used instead.  This function converts the dict form to its
    `~ssl.SSLContext` equivalent, and may be used when a component which
    accepts both forms needs to upgrade to the `~ssl.SSLContext` version
    to use features like SNI or NPN.
    """
    if isinstance(ssl_options, dict):
        assert all(k in _SSL_CONTEXT_KEYWORDS for k in ssl_options), ssl_options
    if (not hasattr(ssl, 'SSLContext') or
            isinstance(ssl_options, ssl.SSLContext)):
        return ssl_options
    context = ssl.SSLContext(
        ssl_options.get('ssl_version', ssl.PROTOCOL_SSLv23))
    if 'certfile' in ssl_options:
        context.load_cert_chain(ssl_options['certfile'], ssl_options.get('keyfile', None))
    if 'cert_reqs' in ssl_options:
        context.verify_mode = ssl_options['cert_reqs']
    if 'ca_certs' in ssl_options:
        context.load_verify_locations(ssl_options['ca_certs'])
    if 'ciphers' in ssl_options:
        context.set_ciphers(ssl_options['ciphers'])
    if hasattr(ssl, 'OP_NO_COMPRESSION'):
        # Disable TLS compression to avoid CRIME and related attacks.
        # This constant wasn't added until python 3.3.
        context.options |= ssl.OP_NO_COMPRESSION
    return context 

# 需要导入模块: import ssl [as 别名]
# 或者: from ssl import OP_NO_COMPRESSION [as 别名]
def ssl_options_to_context(
    ssl_options: Union[Dict[str, Any], ssl.SSLContext]
) -> ssl.SSLContext:
    """Try to convert an ``ssl_options`` dictionary to an
    `~ssl.SSLContext` object.

    The ``ssl_options`` dictionary contains keywords to be passed to
    `ssl.wrap_socket`.  In Python 2.7.9+, `ssl.SSLContext` objects can
    be used instead.  This function converts the dict form to its
    `~ssl.SSLContext` equivalent, and may be used when a component which
    accepts both forms needs to upgrade to the `~ssl.SSLContext` version
    to use features like SNI or NPN.
    """
    if isinstance(ssl_options, ssl.SSLContext):
        return ssl_options
    assert isinstance(ssl_options, dict)
    assert all(k in _SSL_CONTEXT_KEYWORDS for k in ssl_options), ssl_options
    # Can't use create_default_context since this interface doesn't
    # tell us client vs server.
    context = ssl.SSLContext(ssl_options.get("ssl_version", ssl.PROTOCOL_SSLv23))
    if "certfile" in ssl_options:
        context.load_cert_chain(
            ssl_options["certfile"], ssl_options.get("keyfile", None)
        )
    if "cert_reqs" in ssl_options:
        context.verify_mode = ssl_options["cert_reqs"]
    if "ca_certs" in ssl_options:
        context.load_verify_locations(ssl_options["ca_certs"])
    if "ciphers" in ssl_options:
        context.set_ciphers(ssl_options["ciphers"])
    if hasattr(ssl, "OP_NO_COMPRESSION"):
        # Disable TLS compression to avoid CRIME and related attacks.
        # This constant depends on openssl version 1.0.
        # TODO: Do we need to do this ourselves or can we trust
        # the defaults?
        context.options |= ssl.OP_NO_COMPRESSION
    return context 

# 需要导入模块: import ssl [as 别名]
# 或者: from ssl import OP_NO_COMPRESSION [as 别名]
def _get_ssl_options(
        self, scheme: str
    ) -> Union[None, Dict[str, Any], ssl.SSLContext]:
        if scheme == "https":
            if self.request.ssl_options is not None:
                return self.request.ssl_options
            # If we are using the defaults, don't construct a
            # new SSLContext.
            if (
                self.request.validate_cert
                and self.request.ca_certs is None
                and self.request.client_cert is None
                and self.request.client_key is None
            ):
                return _client_ssl_defaults
            ssl_ctx = ssl.create_default_context(
                ssl.Purpose.SERVER_AUTH, cafile=self.request.ca_certs
            )
            if not self.request.validate_cert:
                ssl_ctx.check_hostname = False
                ssl_ctx.verify_mode = ssl.CERT_NONE
            if self.request.client_cert is not None:
                ssl_ctx.load_cert_chain(
                    self.request.client_cert, self.request.client_key
                )
            if hasattr(ssl, "OP_NO_COMPRESSION"):
                # See netutil.ssl_options_to_context
                ssl_ctx.options |= ssl.OP_NO_COMPRESSION
            return ssl_ctx
        return None 

# 需要导入模块: import ssl [as 别名]
# 或者: from ssl import OP_NO_COMPRESSION [as 别名]
def ssl_options_to_context(ssl_options):
    """Try to convert an ``ssl_options`` dictionary to an
    `~ssl.SSLContext` object.

    The ``ssl_options`` dictionary contains keywords to be passed to
    `ssl.wrap_socket`.  In Python 2.7.9+, `ssl.SSLContext` objects can
    be used instead.  This function converts the dict form to its
    `~ssl.SSLContext` equivalent, and may be used when a component which
    accepts both forms needs to upgrade to the `~ssl.SSLContext` version
    to use features like SNI or NPN.
    """
    if isinstance(ssl_options, ssl.SSLContext):
        return ssl_options
    assert isinstance(ssl_options, dict)
    assert all(k in _SSL_CONTEXT_KEYWORDS for k in ssl_options), ssl_options
    # Can't use create_default_context since this interface doesn't
    # tell us client vs server.
    context = ssl.SSLContext(
        ssl_options.get('ssl_version', ssl.PROTOCOL_SSLv23))
    if 'certfile' in ssl_options:
        context.load_cert_chain(ssl_options['certfile'], ssl_options.get('keyfile', None))
    if 'cert_reqs' in ssl_options:
        context.verify_mode = ssl_options['cert_reqs']
    if 'ca_certs' in ssl_options:
        context.load_verify_locations(ssl_options['ca_certs'])
    if 'ciphers' in ssl_options:
        context.set_ciphers(ssl_options['ciphers'])
    if hasattr(ssl, 'OP_NO_COMPRESSION'):
        # Disable TLS compression to avoid CRIME and related attacks.
        # This constant depends on openssl version 1.0.
        # TODO: Do we need to do this ourselves or can we trust
        # the defaults?
        context.options |= ssl.OP_NO_COMPRESSION
    return context 

# 需要导入模块: import ssl [as 别名]
# 或者: from ssl import OP_NO_COMPRESSION [as 别名]
def test_create_ssl_context() -> None:
    path = os.path.join(os.path.dirname(__file__), "assets/config_ssl.py")
    config = Config.from_pyfile(path)
    context = config.create_ssl_context()
    assert context.options & (
        ssl.OP_NO_SSLv2
        | ssl.OP_NO_SSLv3
        | ssl.OP_NO_TLSv1
        | ssl.OP_NO_TLSv1_1
        | ssl.OP_NO_COMPRESSION
    ) 

# 需要导入模块: import ssl [as 别名]
# 或者: from ssl import OP_NO_COMPRESSION [as 别名]
def create_urllib3_context(ssl_version=None, cert_reqs=None,
                           options=None, ciphers=None):
    """All arguments have the same meaning as ``ssl_wrap_socket``.

    By default, this function does a lot of the same work that
    ``ssl.create_default_context`` does on Python 3.4+. It:

    - Disables SSLv2, SSLv3, and compression
    - Sets a restricted set of server ciphers

    If you wish to enable SSLv3, you can do::

        from urllib3.util import ssl_
        context = ssl_.create_urllib3_context()
        context.options &= ~ssl_.OP_NO_SSLv3

    You can do the same to enable compression (substituting ``COMPRESSION``
    for ``SSLv3`` in the last line above).

    :param ssl_version:
        The desired protocol version to use. This will default to
        PROTOCOL_SSLv23 which will negotiate the highest protocol that both
        the server and your installation of OpenSSL support.
    :param cert_reqs:
        Whether to require the certificate verification. This defaults to
        ``ssl.CERT_REQUIRED``.
    :param options:
        Specific OpenSSL options. These default to ``ssl.OP_NO_SSLv2``,
        ``ssl.OP_NO_SSLv3``, ``ssl.OP_NO_COMPRESSION``.
    :param ciphers:
        Which cipher suites to allow the server to select.
    :returns:
        Constructed SSLContext object with specified options
    :rtype: SSLContext
    """
    context = SSLContext(ssl_version or ssl.PROTOCOL_SSLv23)

    # Setting the default here, as we may have no ssl module on import
    cert_reqs = ssl.CERT_REQUIRED if cert_reqs is None else cert_reqs

    if options is None:
        options = 0
        # SSLv2 is easily broken and is considered harmful and dangerous
        options |= OP_NO_SSLv2
        # SSLv3 has several problems and is now dangerous
        options |= OP_NO_SSLv3
        # Disable compression to prevent CRIME attacks for OpenSSL 1.0+
        # (issue #309)
        options |= OP_NO_COMPRESSION

    context.options |= options

    if getattr(context, 'supports_set_ciphers', True):  # Platform-specific: Python 2.6
        context.set_ciphers(ciphers or DEFAULT_CIPHERS)

    context.verify_mode = cert_reqs
    if getattr(context, 'check_hostname', None) is not None:  # Platform-specific: Python 3.2
        # We do our own verification, including fingerprints and alternative
        # hostnames. So disable it here
        context.check_hostname = False
    return context 

# 需要导入模块: import ssl [as 别名]
# 或者: from ssl import OP_NO_COMPRESSION [as 别名]
def create_urllib3_context(ssl_version=None, cert_reqs=None,
                           options=None, ciphers=None):
    """All arguments have the same meaning as ``ssl_wrap_socket``.

    By default, this function does a lot of the same work that
    ``ssl.create_default_context`` does on Python 3.4+. It:

    - Disables SSLv2, SSLv3, and compression
    - Sets a restricted set of server ciphers

    If you wish to enable SSLv3, you can do::

        from urllib3.util import ssl_
        context = ssl_.create_urllib3_context()
        context.options &= ~ssl_.OP_NO_SSLv3

    You can do the same to enable compression (substituting ``COMPRESSION``
    for ``SSLv3`` in the last line above).

    :param ssl_version:
        The desired protocol version to use. This will default to
        PROTOCOL_SSLv23 which will negotiate the highest protocol that both
        the server and your installation of OpenSSL support.
    :param cert_reqs:
        Whether to require the certificate verification. This defaults to
        ``ssl.CERT_REQUIRED``.
    :param options:
        Specific OpenSSL options. These default to ``ssl.OP_NO_SSLv2``,
        ``ssl.OP_NO_SSLv3``, ``ssl.OP_NO_COMPRESSION``.
    :param ciphers:
        Which cipher suites to allow the server to select.
    :returns:
        Constructed SSLContext object with specified options
    :rtype: SSLContext
    """
    context = SSLContext(ssl_version or ssl.PROTOCOL_SSLv23)

    context.set_ciphers(ciphers or DEFAULT_CIPHERS)

    # Setting the default here, as we may have no ssl module on import
    cert_reqs = ssl.CERT_REQUIRED if cert_reqs is None else cert_reqs

    if options is None:
        options = 0
        # SSLv2 is easily broken and is considered harmful and dangerous
        options |= OP_NO_SSLv2
        # SSLv3 has several problems and is now dangerous
        options |= OP_NO_SSLv3
        # Disable compression to prevent CRIME attacks for OpenSSL 1.0+
        # (issue #309)
        options |= OP_NO_COMPRESSION

    context.options |= options

    context.verify_mode = cert_reqs
    if getattr(context, 'check_hostname', None) is not None:  # Platform-specific: Python 3.2
        # We do our own verification, including fingerprints and alternative
        # hostnames. So disable it here
        context.check_hostname = False
    return context