Issue #26470: Port ssl and hashlib module to OpenSSL 1.1.0.

6 files changed, 393 insertions, 164 deletions

diff --git a/Doc/library/ssl.rst b/Doc/library/ssl.rst
index 5792d0d..d8fc8de 100644
--- a/Doc/library/ssl.rst
+++ b/Doc/library/ssl.rst
@@ -178,7 +178,7 @@ instead.
    use.  Typically, the server chooses a particular protocol version, and the
    client must adapt to the server's choice.  Most of the versions are not
    interoperable with the other versions.  If not specified, the default is
-   :data:`PROTOCOL_SSLv23`; it provides the most compatibility with other
+   :data:`PROTOCOL_TLS`; it provides the most compatibility with other
    versions.
 
    Here's a table showing which versions in a client (down the side) can connect
@@ -187,11 +187,11 @@ instead.
      .. table::
 
        ========================  =========  =========  ==========  =========  ===========  ===========
-        *client* / **server**    **SSLv2**  **SSLv3**  **SSLv23**  **TLSv1**  **TLSv1.1**  **TLSv1.2**
+        *client* / **server**    **SSLv2**  **SSLv3**  **TLS**     **TLSv1**  **TLSv1.1**  **TLSv1.2**
        ------------------------  ---------  ---------  ----------  ---------  -----------  -----------
         *SSLv2*                    yes        no         yes         no         no         no
         *SSLv3*                    no         yes        yes         no         no         no
-        *SSLv23*                   no         yes        yes         yes        yes        yes
+        *TLS* (*SSLv23*)           no         yes        yes         yes        yes        yes
         *TLSv1*                    no         no         yes         yes        no         no
         *TLSv1.1*                  no         no         yes         no         yes        no
         *TLSv1.2*                  no         no         yes         no         no         yes
@@ -244,7 +244,7 @@ purposes.
    :const:`None`, this function can choose to trust the system's default
    CA certificates instead.
 
-   The settings are: :data:`PROTOCOL_SSLv23`, :data:`OP_NO_SSLv2`, and
+   The settings are: :data:`PROTOCOL_TLS`, :data:`OP_NO_SSLv2`, and
    :data:`OP_NO_SSLv3` with high encryption cipher suites without RC4 and
    without unauthenticated cipher suites. Passing :data:`~Purpose.SERVER_AUTH`
    as *purpose* sets :data:`~SSLContext.verify_mode` to :data:`CERT_REQUIRED`
@@ -316,6 +316,11 @@ Random generation
 
    .. versionadded:: 3.3
 
+   .. deprecated:: 3.5.3
+
+      OpenSSL has deprecated :func:`ssl.RAND_pseudo_bytes`, use
+      :func:`ssl.RAND_bytes` instead.
+
 .. function:: RAND_status()
 
    Return ``True`` if the SSL pseudo-random number generator has been seeded
@@ -334,7 +339,7 @@ Random generation
    See http://egd.sourceforge.net/ or http://prngd.sourceforge.net/ for sources
    of entropy-gathering daemons.
 
-   Availability: not available with LibreSSL.
+   Availability: not available with LibreSSL and OpenSSL > 1.1.0
 
 .. function:: RAND_add(bytes, entropy)
 
@@ -409,7 +414,7 @@ Certificate handling
       previously. Return an integer (no fractions of a second in the
       input format)
 
-.. function:: get_server_certificate(addr, ssl_version=PROTOCOL_SSLv23, ca_certs=None)
+.. function:: get_server_certificate(addr, ssl_version=PROTOCOL_TLS, ca_certs=None)
 
    Given the address ``addr`` of an SSL-protected server, as a (*hostname*,
    *port-number*) pair, fetches the server's certificate, and returns it as a
@@ -425,7 +430,7 @@ Certificate handling
 
    .. versionchanged:: 3.5
       The default *ssl_version* is changed from :data:`PROTOCOL_SSLv3` to
-      :data:`PROTOCOL_SSLv23` for maximum compatibility with modern servers.
+      :data:`PROTOCOL_TLS` for maximum compatibility with modern servers.
 
 .. function:: DER_cert_to_PEM_cert(DER_cert_bytes)
 
@@ -451,6 +456,9 @@ Certificate handling
    * :attr:`openssl_capath_env` - OpenSSL's environment key that points to a capath,
    * :attr:`openssl_capath` - hard coded path to a capath directory
 
+   Availability: LibreSSL ignores the environment vars
+   :attr:`openssl_cafile_env` and :attr:`openssl_capath_env`
+
    .. versionadded:: 3.4
 
 .. function:: enum_certificates(store_name)
@@ -568,11 +576,21 @@ Constants
 
    .. versionadded:: 3.4.4
 
-.. data:: PROTOCOL_SSLv23
+.. data:: PROTOCOL_TLS
 
    Selects the highest protocol version that both the client and server support.
    Despite the name, this option can select "TLS" protocols as well as "SSL".
 
+   .. versionadded:: 3.5.3
+
+.. data:: PROTOCOL_SSLv23
+
+   Alias for data:`PROTOCOL_TLS`.
+
+   .. deprecated:: 3.5.3
+
+      Use data:`PROTOCOL_TLS` instead.
+
 .. data:: PROTOCOL_SSLv2
 
    Selects SSL version 2 as the channel encryption protocol.
@@ -584,6 +602,10 @@ Constants
 
       SSL version 2 is insecure.  Its use is highly discouraged.
 
+   .. deprecated:: 3.5.3
+
+      OpenSSL has removed support for SSLv2.
+
 .. data:: PROTOCOL_SSLv3
 
    Selects SSL version 3 as the channel encryption protocol.
@@ -595,10 +617,20 @@ Constants
 
       SSL version 3 is insecure.  Its use is highly discouraged.
 
+   .. deprecated:: 3.5.3
+
+      OpenSSL has deprecated all version specific protocols. Use the default
+      protocol data:`PROTOCOL_TLS` with flags like data:`OP_NO_SSLv3` instead.
+
 .. data:: PROTOCOL_TLSv1
 
    Selects TLS version 1.0 as the channel encryption protocol.
 
+   .. deprecated:: 3.5.3
+
+      OpenSSL has deprecated all version specific protocols. Use the default
+      protocol data:`PROTOCOL_TLS` with flags like data:`OP_NO_SSLv3` instead.
+
 .. data:: PROTOCOL_TLSv1_1
 
    Selects TLS version 1.1 as the channel encryption protocol.
@@ -606,6 +638,11 @@ Constants
 
    .. versionadded:: 3.4
 
+   .. deprecated:: 3.5.3
+
+      OpenSSL has deprecated all version specific protocols. Use the default
+      protocol data:`PROTOCOL_TLS` with flags like data:`OP_NO_SSLv3` instead.
+
 .. data:: PROTOCOL_TLSv1_2
 
    Selects TLS version 1.2 as the channel encryption protocol. This is the
@@ -614,6 +651,11 @@ Constants
 
    .. versionadded:: 3.4
 
+   .. deprecated:: 3.5.3
+
+      OpenSSL has deprecated all version specific protocols. Use the default
+      protocol data:`PROTOCOL_TLS` with flags like data:`OP_NO_SSLv3` instead.
+
 .. data:: OP_ALL
 
    Enables workarounds for various bugs present in other SSL implementations.
@@ -625,23 +667,32 @@ Constants
 .. data:: OP_NO_SSLv2
 
    Prevents an SSLv2 connection.  This option is only applicable in
-   conjunction with :const:`PROTOCOL_SSLv23`.  It prevents the peers from
+   conjunction with :const:`PROTOCOL_TLS`.  It prevents the peers from
    choosing SSLv2 as the protocol version.
 
    .. versionadded:: 3.2
 
+   .. deprecated:: 3.5.3
+
+      SSLv2 is deprecated
+
+
 .. data:: OP_NO_SSLv3
 
    Prevents an SSLv3 connection.  This option is only applicable in
-   conjunction with :const:`PROTOCOL_SSLv23`.  It prevents the peers from
+   conjunction with :const:`PROTOCOL_TLS`.  It prevents the peers from
    choosing SSLv3 as the protocol version.
 
    .. versionadded:: 3.2
 
+   .. deprecated:: 3.5.3
+
+      SSLv3 is deprecated
+
 .. data:: OP_NO_TLSv1
 
    Prevents a TLSv1 connection.  This option is only applicable in
-   conjunction with :const:`PROTOCOL_SSLv23`.  It prevents the peers from
+   conjunction with :const:`PROTOCOL_TLS`.  It prevents the peers from
    choosing TLSv1 as the protocol version.
 
    .. versionadded:: 3.2
@@ -649,7 +700,7 @@ Constants
 .. data:: OP_NO_TLSv1_1
 
    Prevents a TLSv1.1 connection. This option is only applicable in conjunction
-   with :const:`PROTOCOL_SSLv23`. It prevents the peers from choosing TLSv1.1 as
+   with :const:`PROTOCOL_TLS`. It prevents the peers from choosing TLSv1.1 as
    the protocol version. Available only with openssl version 1.0.1+.
 
    .. versionadded:: 3.4
@@ -657,7 +708,7 @@ Constants
 .. data:: OP_NO_TLSv1_2
 
    Prevents a TLSv1.2 connection. This option is only applicable in conjunction
-   with :const:`PROTOCOL_SSLv23`. It prevents the peers from choosing TLSv1.2 as
+   with :const:`PROTOCOL_TLS`. It prevents the peers from choosing TLSv1.2 as
    the protocol version. Available only with openssl version 1.0.1+.
 
    .. versionadded:: 3.4
@@ -1081,17 +1132,21 @@ such as SSL configuration options, certificate(s) and private key(s).
 It also manages a cache of SSL sessions for server-side sockets, in order
 to speed up repeated connections from the same clients.
 
-.. class:: SSLContext(protocol)
+.. class:: SSLContext(protocol=PROTOCOL_TLS)
 
-   Create a new SSL context.  You must pass *protocol* which must be one
+   Create a new SSL context.  You may pass *protocol* which must be one
    of the ``PROTOCOL_*`` constants defined in this module.
-   :data:`PROTOCOL_SSLv23` is currently recommended for maximum
-   interoperability.
+   :data:`PROTOCOL_TLS` is currently recommended for maximum
+   interoperability and default value.
 
    .. seealso::
       :func:`create_default_context` lets the :mod:`ssl` module choose
       security settings for a given purpose.
 
+   .. versionchanged:: 3.5.3
+
+      :data:`PROTOCOL_TLS` is the default value.
+
 
 :class:`SSLContext` objects have the following methods and attributes:
 
@@ -1232,6 +1287,9 @@ to speed up repeated connections from the same clients.
    This method will raise :exc:`NotImplementedError` if :data:`HAS_ALPN` is
    False.
 
+   OpenSSL 1.1.0+ will abort the handshake and raise :exc:`SSLError` when
+   both sides support ALPN but cannot agree on a protocol.
+
    .. versionadded:: 3.5
 
 .. method:: SSLContext.set_npn_protocols(protocols)
@@ -1598,7 +1656,7 @@ If you prefer to tune security settings yourself, you might create
 a context from scratch (but beware that you might not get the settings
 right)::
 
-   >>> context = ssl.SSLContext(ssl.PROTOCOL_SSLv23)
+   >>> context = ssl.SSLContext(ssl.PROTOCOL_TLS)
    >>> context.verify_mode = ssl.CERT_REQUIRED
    >>> context.check_hostname = True
    >>> context.load_verify_locations("/etc/ssl/certs/ca-bundle.crt")
@@ -1999,15 +2057,17 @@ Protocol versions
 
 SSL versions 2 and 3 are considered insecure and are therefore dangerous to
 use.  If you want maximum compatibility between clients and servers, it is
-recommended to use :const:`PROTOCOL_SSLv23` as the protocol version and then
+recommended to use :const:`PROTOCOL_TLS` as the protocol version and then
 disable SSLv2 and SSLv3 explicitly using the :data:`SSLContext.options`
 attribute::
 
-   context = ssl.SSLContext(ssl.PROTOCOL_SSLv23)
+   context = ssl.SSLContext(ssl.PROTOCOL_TLS)
    context.options |= ssl.OP_NO_SSLv2
    context.options |= ssl.OP_NO_SSLv3
+   context.options |= ssl.OP_NO_TLSv1
+   context.options |= ssl.OP_NO_TLSv1_1
 
-The SSL context created above will only allow TLSv1 and later (if
+The SSL context created above will only allow TLSv1.2 and later (if
 supported by your system) connections.
 
 Cipher selection
diff --git a/Lib/ssl.py b/Lib/ssl.py
index 3f5c3c4..2ea5111 100644
--- a/Lib/ssl.py
+++ b/Lib/ssl.py
@@ -51,6 +51,7 @@ The following constants identify various SSL protocol variants:
 PROTOCOL_SSLv2
 PROTOCOL_SSLv3
 PROTOCOL_SSLv23
+PROTOCOL_TLS
 PROTOCOL_TLSv1
 PROTOCOL_TLSv1_1
 PROTOCOL_TLSv1_2
@@ -128,9 +129,10 @@ from _ssl import _OPENSSL_API_VERSION
 
 _IntEnum._convert(
         '_SSLMethod', __name__,
-        lambda name: name.startswith('PROTOCOL_'),
+        lambda name: name.startswith('PROTOCOL_') and name != 'PROTOCOL_SSLv23',
         source=_ssl)
 
+PROTOCOL_SSLv23 = _SSLMethod.PROTOCOL_SSLv23 = _SSLMethod.PROTOCOL_TLS
 _PROTOCOL_NAMES = {value: name for name, value in _SSLMethod.__members__.items()}
 
 try:
@@ -357,13 +359,13 @@ class SSLContext(_SSLContext):
     __slots__ = ('protocol', '__weakref__')
     _windows_cert_stores = ("CA", "ROOT")
 
-    def __new__(cls, protocol, *args, **kwargs):
+    def __new__(cls, protocol=PROTOCOL_TLS, *args, **kwargs):
         self = _SSLContext.__new__(cls, protocol)
         if protocol != _SSLv2_IF_EXISTS:
             self.set_ciphers(_DEFAULT_CIPHERS)
         return self
 
-    def __init__(self, protocol):
+    def __init__(self, protocol=PROTOCOL_TLS):
         self.protocol = protocol
 
     def wrap_socket(self, sock, server_side=False,
@@ -438,7 +440,7 @@ def create_default_context(purpose=Purpose.SERVER_AUTH, *, cafile=None,
     if not isinstance(purpose, _ASN1Object):
         raise TypeError(purpose)
 
-    context = SSLContext(PROTOCOL_SSLv23)
+    context = SSLContext(PROTOCOL_TLS)
 
     # SSLv2 considered harmful.
     context.options |= OP_NO_SSLv2
@@ -475,7 +477,7 @@ def create_default_context(purpose=Purpose.SERVER_AUTH, *, cafile=None,
         context.load_default_certs(purpose)
     return context
 
-def _create_unverified_context(protocol=PROTOCOL_SSLv23, *, cert_reqs=None,
+def _create_unverified_context(protocol=PROTOCOL_TLS, *, cert_reqs=None,
                            check_hostname=False, purpose=Purpose.SERVER_AUTH,
                            certfile=None, keyfile=None,
                            cafile=None, capath=None, cadata=None):
@@ -666,7 +668,7 @@ class SSLSocket(socket):
 
     def __init__(self, sock=None, keyfile=None, certfile=None,
                  server_side=False, cert_reqs=CERT_NONE,
-                 ssl_version=PROTOCOL_SSLv23, ca_certs=None,
+                 ssl_version=PROTOCOL_TLS, ca_certs=None,
                  do_handshake_on_connect=True,
                  family=AF_INET, type=SOCK_STREAM, proto=0, fileno=None,
                  suppress_ragged_eofs=True, npn_protocols=None, ciphers=None,
@@ -1056,7 +1058,7 @@ class SSLSocket(socket):
 
 def wrap_socket(sock, keyfile=None, certfile=None,
                 server_side=False, cert_reqs=CERT_NONE,
-                ssl_version=PROTOCOL_SSLv23, ca_certs=None,
+                ssl_version=PROTOCOL_TLS, ca_certs=None,
                 do_handshake_on_connect=True,
                 suppress_ragged_eofs=True,
                 ciphers=None):
@@ -1125,7 +1127,7 @@ def PEM_cert_to_DER_cert(pem_cert_string):
     d = pem_cert_string.strip()[len(PEM_HEADER):-len(PEM_FOOTER)]
     return base64.decodebytes(d.encode('ASCII', 'strict'))
 
-def get_server_certificate(addr, ssl_version=PROTOCOL_SSLv23, ca_certs=None):
+def get_server_certificate(addr, ssl_version=PROTOCOL_TLS, ca_certs=None):
     """Retrieve the certificate from the server at the specified address,
     and return it as a PEM-encoded string.
     If 'ca_certs' is specified, validate the server cert against it.
diff --git a/Lib/test/test_ssl.py b/Lib/test/test_ssl.py
index f48103e..79e26ba 100644
--- a/Lib/test/test_ssl.py
+++ b/Lib/test/test_ssl.py
@@ -23,6 +23,9 @@ ssl = support.import_module("ssl")
 
 PROTOCOLS = sorted(ssl._PROTOCOL_NAMES)
 HOST = support.HOST
+IS_LIBRESSL = ssl.OPENSSL_VERSION.startswith('LibreSSL')
+IS_OPENSSL_1_1 = not IS_LIBRESSL and ssl.OPENSSL_VERSION_INFO >= (1, 1, 0)
+
 
 def data_file(*name):
     return os.path.join(os.path.dirname(__file__), *name)
@@ -143,8 +146,8 @@ class BasicSocketTests(unittest.TestCase):
     def test_str_for_enums(self):
         # Make sure that the PROTOCOL_* constants have enum-like string
         # reprs.
-        proto = ssl.PROTOCOL_SSLv23
-        self.assertEqual(str(proto), '_SSLMethod.PROTOCOL_SSLv23')
+        proto = ssl.PROTOCOL_TLS
+        self.assertEqual(str(proto), '_SSLMethod.PROTOCOL_TLS')
         ctx = ssl.SSLContext(proto)
         self.assertIs(ctx.protocol, proto)
 
@@ -312,8 +315,8 @@ class BasicSocketTests(unittest.TestCase):
         self.assertGreaterEqual(status, 0)
         self.assertLessEqual(status, 15)
         # Version string as returned by {Open,Libre}SSL, the format might change
-        if "LibreSSL" in s:
-            self.assertTrue(s.startswith("LibreSSL {:d}.{:d}".format(major, minor)),
+        if IS_LIBRESSL:
+            self.assertTrue(s.startswith("LibreSSL {:d}".format(major)),
                             (s, t, hex(n)))
         else:
             self.assertTrue(s.startswith("OpenSSL {:d}.{:d}.{:d}".format(major, minor, fix)),
@@ -790,7 +793,8 @@ class ContextTests(unittest.TestCase):
     def test_constructor(self):
         for protocol in PROTOCOLS:
             ssl.SSLContext(protocol)
-        self.assertRaises(TypeError, ssl.SSLContext)
+        ctx = ssl.SSLContext()
+        self.assertEqual(ctx.protocol, ssl.PROTOCOL_TLS)
         self.assertRaises(ValueError, ssl.SSLContext, -1)
         self.assertRaises(ValueError, ssl.SSLContext, 42)
 
@@ -811,15 +815,15 @@ class ContextTests(unittest.TestCase):
     def test_options(self):
         ctx = ssl.SSLContext(ssl.PROTOCOL_TLSv1)
         # OP_ALL | OP_NO_SSLv2 | OP_NO_SSLv3 is the default value
-        self.assertEqual(ssl.OP_ALL | ssl.OP_NO_SSLv2 | ssl.OP_NO_SSLv3,
-                         ctx.options)
+        default = (ssl.OP_ALL | ssl.OP_NO_SSLv2 | ssl.OP_NO_SSLv3)
+        if not IS_LIBRESSL and ssl.OPENSSL_VERSION_INFO >= (1, 1, 0):
+            default |= ssl.OP_NO_COMPRESSION
+        self.assertEqual(default, ctx.options)
         ctx.options |= ssl.OP_NO_TLSv1
-        self.assertEqual(ssl.OP_ALL | ssl.OP_NO_SSLv2 | ssl.OP_NO_SSLv3 | ssl.OP_NO_TLSv1,
-                         ctx.options)
+        self.assertEqual(default | ssl.OP_NO_TLSv1, ctx.options)
         if can_clear_options():
-            ctx.options = (ctx.options & ~ssl.OP_NO_SSLv2) | ssl.OP_NO_TLSv1
-            self.assertEqual(ssl.OP_ALL | ssl.OP_NO_TLSv1 | ssl.OP_NO_SSLv3,
-                             ctx.options)
+            ctx.options = (ctx.options & ~ssl.OP_NO_TLSv1)
+            self.assertEqual(default, ctx.options)
             ctx.options = 0
             # Ubuntu has OP_NO_SSLv3 forced on by default
             self.assertEqual(0, ctx.options & ~ssl.OP_NO_SSLv3)
@@ -1155,6 +1159,7 @@ class ContextTests(unittest.TestCase):
         self.assertRaises(TypeError, ctx.load_default_certs, 'SERVER_AUTH')
 
     @unittest.skipIf(sys.platform == "win32", "not-Windows specific")
+    @unittest.skipIf(IS_LIBRESSL, "LibreSSL doesn't support env vars")
     def test_load_default_certs_env(self):
         ctx = ssl.SSLContext(ssl.PROTOCOL_TLSv1)
         with support.EnvironmentVarGuard() as env:
@@ -1750,13 +1755,13 @@ class NetworkedBIOTests(unittest.TestCase):
             sslobj = ctx.wrap_bio(incoming, outgoing, False, REMOTE_HOST)
             self.assertIs(sslobj._sslobj.owner, sslobj)
             self.assertIsNone(sslobj.cipher())
-            self.assertIsNone(sslobj.shared_ciphers())
+            self.assertIsNotNone(sslobj.shared_ciphers())
             self.assertRaises(ValueError, sslobj.getpeercert)
             if 'tls-unique' in ssl.CHANNEL_BINDING_TYPES:
                 self.assertIsNone(sslobj.get_channel_binding('tls-unique'))
             self.ssl_io_loop(sock, incoming, outgoing, sslobj.do_handshake)
             self.assertTrue(sslobj.cipher())
-            self.assertIsNone(sslobj.shared_ciphers())
+            self.assertIsNotNone(sslobj.shared_ciphers())
             self.assertTrue(sslobj.getpeercert())
             if 'tls-unique' in ssl.CHANNEL_BINDING_TYPES:
                 self.assertTrue(sslobj.get_channel_binding('tls-unique'))
@@ -2993,7 +2998,7 @@ else:
                 with context.wrap_socket(socket.socket()) as s:
                     self.assertIs(s.version(), None)
                     s.connect((HOST, server.port))
-                    self.assertEqual(s.version(), "TLSv1")
+                    self.assertEqual(s.version(), 'TLSv1')
                 self.assertIs(s.version(), None)
 
         @unittest.skipUnless(ssl.HAS_ECDH, "test requires ECDH-enabled OpenSSL")
@@ -3135,24 +3140,36 @@ else:
                 (['http/3.0', 'http/4.0'], None)
             ]
             for client_protocols, expected in protocol_tests:
-                server_context = ssl.SSLContext(ssl.PROTOCOL_TLSv1)
+                server_context = ssl.SSLContext(ssl.PROTOCOL_TLSv1_2)
                 server_context.load_cert_chain(CERTFILE)
                 server_context.set_alpn_protocols(server_protocols)
-                client_context = ssl.SSLContext(ssl.PROTOCOL_TLSv1)
+                client_context = ssl.SSLContext(ssl.PROTOCOL_TLSv1_2)
                 client_context.load_cert_chain(CERTFILE)
                 client_context.set_alpn_protocols(client_protocols)
-                stats = server_params_test(client_context, server_context,
-                                           chatty=True, connectionchatty=True)
 
-                msg = "failed trying %s (s) and %s (c).\n" \
-                      "was expecting %s, but got %%s from the %%s" \
-                          % (str(server_protocols), str(client_protocols),
-                             str(expected))
-                client_result = stats['client_alpn_protocol']
-                self.assertEqual(client_result, expected, msg % (client_result, "client"))
-                server_result = stats['server_alpn_protocols'][-1] \
-                    if len(stats['server_alpn_protocols']) else 'nothing'
-                self.assertEqual(server_result, expected, msg % (server_result, "server"))
+                try:
+                    stats = server_params_test(client_context,
+                                               server_context,
+                                               chatty=True,
+                                               connectionchatty=True)
+                except ssl.SSLError as e:
+                    stats = e
+
+                if expected is None and IS_OPENSSL_1_1:
+                    # OpenSSL 1.1.0 raises handshake error
+                    self.assertIsInstance(stats, ssl.SSLError)
+                else:
+                    msg = "failed trying %s (s) and %s (c).\n" \
+                        "was expecting %s, but got %%s from the %%s" \
+                            % (str(server_protocols), str(client_protocols),
+                                str(expected))
+                    client_result = stats['client_alpn_protocol']
+                    self.assertEqual(client_result, expected,
+                                     msg % (client_result, "client"))
+                    server_result = stats['server_alpn_protocols'][-1] \
+                        if len(stats['server_alpn_protocols']) else 'nothing'
+                    self.assertEqual(server_result, expected,
+                                     msg % (server_result, "server"))
 
         def test_selected_npn_protocol(self):
             # selected_npn_protocol() is None unless NPN is used
@@ -3300,13 +3317,23 @@ else:
             client_context = ssl.SSLContext(ssl.PROTOCOL_TLSv1)
             client_context.verify_mode = ssl.CERT_REQUIRED
             client_context.load_verify_locations(SIGNING_CA)
-            client_context.set_ciphers("RC4")
-            server_context.set_ciphers("AES:RC4")
+            if ssl.OPENSSL_VERSION_INFO >= (1, 0, 2):
+                client_context.set_ciphers("AES128:AES256")
+                server_context.set_ciphers("AES256")
+                alg1 = "AES256"
+                alg2 = "AES-256"
+            else:
+                client_context.set_ciphers("AES:3DES")
+                server_context.set_ciphers("3DES")
+                alg1 = "3DES"
+                alg2 = "DES-CBC3"
+
             stats = server_params_test(client_context, server_context)
             ciphers = stats['server_shared_ciphers'][0]
             self.assertGreater(len(ciphers), 0)
             for name, tls_version, bits in ciphers:
-                self.assertIn("RC4", name.split("-"))
+                if not alg1 in name.split("-") and alg2 not in name:
+                    self.fail(name)
 
         def test_read_write_after_close_raises_valuerror(self):
             context = ssl.SSLContext(ssl.PROTOCOL_SSLv23)
diff --git a/Misc/NEWS b/Misc/NEWS
index 4b18999..49b1ce2 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -60,6 +60,8 @@ Core and Builtins
 Library
 -------
 
+- Issue #26470: Port ssl and hashlib module to OpenSSL 1.1.0.
+
 - Issue #12885: Fix error when distutils encounters symlink.
 
 - Issue #27881: Fixed possible bugs when setting sqlite3.Connection.isolation_level.
diff --git a/Modules/_hashopenssl.c b/Modules/_hashopenssl.c
index 44765ac..986c10b 100644
--- a/Modules/_hashopenssl.c
+++ b/Modules/_hashopenssl.c
@@ -21,7 +21,6 @@
 
 /* EVP is the preferred interface to hashing in OpenSSL */
 #include <openssl/evp.h>
-#include <openssl/hmac.h>
 /* We use the object interface to discover what hashes OpenSSL supports. */
 #include <openssl/objects.h>
 #include "openssl/err.h"
@@ -32,11 +31,22 @@
 #define HASH_OBJ_CONSTRUCTOR 0
 #endif
 
+#if (OPENSSL_VERSION_NUMBER < 0x10100000L) || defined(LIBRESSL_VERSION_NUMBER)
+/* OpenSSL < 1.1.0 */
+#define EVP_MD_CTX_new EVP_MD_CTX_create
+#define EVP_MD_CTX_free EVP_MD_CTX_destroy
+#define HAS_FAST_PKCS5_PBKDF2_HMAC 0
+#include <openssl/hmac.h>
+#else
+/* OpenSSL >= 1.1.0 */
+#define HAS_FAST_PKCS5_PBKDF2_HMAC 1
+#endif
+
 
 typedef struct {
     PyObject_HEAD
     PyObject            *name;  /* name of this hash algorithm */
-    EVP_MD_CTX           ctx;   /* OpenSSL message digest context */
+    EVP_MD_CTX          *ctx;   /* OpenSSL message digest context */
 #ifdef WITH_THREAD
     PyThread_type_lock   lock;  /* OpenSSL context lock */
 #endif
@@ -48,7 +58,6 @@ static PyTypeObject EVPtype;
 
 #define DEFINE_CONSTS_FOR_NEW(Name)  \
     static PyObject *CONST_ ## Name ## _name_obj = NULL; \
-    static EVP_MD_CTX CONST_new_ ## Name ## _ctx; \
     static EVP_MD_CTX *CONST_new_ ## Name ## _ctx_p = NULL;
 
 DEFINE_CONSTS_FOR_NEW(md5)
@@ -59,19 +68,57 @@ DEFINE_CONSTS_FOR_NEW(sha384)
 DEFINE_CONSTS_FOR_NEW(sha512)
 
 
+/* LCOV_EXCL_START */
+static PyObject *
+_setException(PyObject *exc)
+{
+    unsigned long errcode;
+    const char *lib, *func, *reason;
+
+    errcode = ERR_peek_last_error();
+    if (!errcode) {
+        PyErr_SetString(exc, "unknown reasons");
+        return NULL;
+    }
+    ERR_clear_error();
+
+    lib = ERR_lib_error_string(errcode);
+    func = ERR_func_error_string(errcode);
+    reason = ERR_reason_error_string(errcode);
+
+    if (lib && func) {
+        PyErr_Format(exc, "[%s: %s] %s", lib, func, reason);
+    }
+    else if (lib) {
+        PyErr_Format(exc, "[%s] %s", lib, reason);
+    }
+    else {
+        PyErr_SetString(exc, reason);
+    }
+    return NULL;
+}
+/* LCOV_EXCL_STOP */
+
 static EVPobject *
 newEVPobject(PyObject *name)
 {
     EVPobject *retval = (EVPobject *)PyObject_New(EVPobject, &EVPtype);
+    if (retval == NULL) {
+        return NULL;
+    }
+
+    retval->ctx = EVP_MD_CTX_new();
+    if (retval->ctx == NULL) {
+        PyErr_NoMemory();
+        return NULL;
+    }
 
     /* save the name for .name to return */
-    if (retval != NULL) {
-        Py_INCREF(name);
-        retval->name = name;
+    Py_INCREF(name);
+    retval->name = name;
 #ifdef WITH_THREAD
-        retval->lock = NULL;
+    retval->lock = NULL;
 #endif
-    }
 
     return retval;
 }
@@ -86,7 +133,7 @@ EVP_hash(EVPobject *self, const void *vp, Py_ssize_t len)
             process = MUNCH_SIZE;
         else
             process = Py_SAFE_DOWNCAST(len, Py_ssize_t, unsigned int);
-        EVP_DigestUpdate(&self->ctx, (const void*)cp, process);
+        EVP_DigestUpdate(self->ctx, (const void*)cp, process);
         len -= process;
         cp += process;
     }
@@ -101,16 +148,19 @@ EVP_dealloc(EVPobject *self)
     if (self->lock != NULL)
         PyThread_free_lock(self->lock);
 #endif
-    EVP_MD_CTX_cleanup(&self->ctx);
+    EVP_MD_CTX_free(self->ctx);
     Py_XDECREF(self->name);
     PyObject_Del(self);
 }
 
-static void locked_EVP_MD_CTX_copy(EVP_MD_CTX *new_ctx_p, EVPobject *self)
+static int
+locked_EVP_MD_CTX_copy(EVP_MD_CTX *new_ctx_p, EVPobject *self)
 {
+    int result;
     ENTER_HASHLIB(self);
-    EVP_MD_CTX_copy(new_ctx_p, &self->ctx);
+    result = EVP_MD_CTX_copy(new_ctx_p, self->ctx);
     LEAVE_HASHLIB(self);
+    return result;
 }
 
 /* External methods for a hash object */
@@ -126,7 +176,9 @@ EVP_copy(EVPobject *self, PyObject *unused)
     if ( (newobj = newEVPobject(self->name))==NULL)
         return NULL;
 
-    locked_EVP_MD_CTX_copy(&newobj->ctx, self);
+    if (!locked_EVP_MD_CTX_copy(newobj->ctx, self)) {
+        return _setException(PyExc_ValueError);
+    }
     return (PyObject *)newobj;
 }
 
@@ -137,16 +189,24 @@ static PyObject *
 EVP_digest(EVPobject *self, PyObject *unused)
 {
     unsigned char digest[EVP_MAX_MD_SIZE];
-    EVP_MD_CTX temp_ctx;
+    EVP_MD_CTX *temp_ctx;
     PyObject *retval;
     unsigned int digest_size;
 
-    locked_EVP_MD_CTX_copy(&temp_ctx, self);
-    digest_size = EVP_MD_CTX_size(&temp_ctx);
-    EVP_DigestFinal(&temp_ctx, digest, NULL);
+    temp_ctx = EVP_MD_CTX_new();
+    if (temp_ctx == NULL) {
+        PyErr_NoMemory();
+        return NULL;
+    }
+
+    if (!locked_EVP_MD_CTX_copy(temp_ctx, self)) {
+        return _setException(PyExc_ValueError);
+    }
+    digest_size = EVP_MD_CTX_size(temp_ctx);
+    EVP_DigestFinal(temp_ctx, digest, NULL);
 
     retval = PyBytes_FromStringAndSize((const char *)digest, digest_size);
-    EVP_MD_CTX_cleanup(&temp_ctx);
+    EVP_MD_CTX_free(temp_ctx);
     return retval;
 }
 
@@ -157,15 +217,23 @@ static PyObject *
 EVP_hexdigest(EVPobject *self, PyObject *unused)
 {
     unsigned char digest[EVP_MAX_MD_SIZE];
-    EVP_MD_CTX temp_ctx;
+    EVP_MD_CTX *temp_ctx;
     unsigned int digest_size;
 
+    temp_ctx = EVP_MD_CTX_new();
+    if (temp_ctx == NULL) {
+        PyErr_NoMemory();
+        return NULL;
+    }
+
     /* Get the raw (binary) digest value */
-    locked_EVP_MD_CTX_copy(&temp_ctx, self);
-    digest_size = EVP_MD_CTX_size(&temp_ctx);
-    EVP_DigestFinal(&temp_ctx, digest, NULL);
+    if (!locked_EVP_MD_CTX_copy(temp_ctx, self)) {
+        return _setException(PyExc_ValueError);
+    }
+    digest_size = EVP_MD_CTX_size(temp_ctx);
+    EVP_DigestFinal(temp_ctx, digest, NULL);
 
-    EVP_MD_CTX_cleanup(&temp_ctx);
+    EVP_MD_CTX_free(temp_ctx);
 
     return _Py_strhex((const char *)digest, digest_size);
 }
@@ -219,7 +287,7 @@ static PyObject *
 EVP_get_block_size(EVPobject *self, void *closure)
 {
     long block_size;
-    block_size = EVP_MD_CTX_block_size(&self->ctx);
+    block_size = EVP_MD_CTX_block_size(self->ctx);
     return PyLong_FromLong(block_size);
 }
 
@@ -227,7 +295,7 @@ static PyObject *
 EVP_get_digest_size(EVPobject *self, void *closure)
 {
     long size;
-    size = EVP_MD_CTX_size(&self->ctx);
+    size = EVP_MD_CTX_size(self->ctx);
     return PyLong_FromLong(size);
 }
 
@@ -288,7 +356,7 @@ EVP_tp_init(EVPobject *self, PyObject *args, PyObject *kwds)
             PyBuffer_Release(&view);
         return -1;
     }
-    EVP_DigestInit(&self->ctx, digest);
+    EVP_DigestInit(self->ctx, digest);
 
     self->name = name_obj;
     Py_INCREF(self->name);
@@ -385,9 +453,9 @@ EVPnew(PyObject *name_obj,
         return NULL;
 
     if (initial_ctx) {
-        EVP_MD_CTX_copy(&self->ctx, initial_ctx);
+        EVP_MD_CTX_copy(self->ctx, initial_ctx);
     } else {
-        EVP_DigestInit(&self->ctx, digest);
+        EVP_DigestInit(self->ctx, digest);
     }
 
     if (cp && len) {
@@ -453,6 +521,7 @@ EVP_new(PyObject *self, PyObject *args, PyObject *kwdict)
 
 #define PY_PBKDF2_HMAC 1
 
+#if !HAS_FAST_PKCS5_PBKDF2_HMAC
 /* Improved implementation of PKCS5_PBKDF2_HMAC()
  *
  * PKCS5_PBKDF2_HMAC_fast() hashes the password exactly one time instead of
@@ -534,37 +603,8 @@ PKCS5_PBKDF2_HMAC_fast(const char *pass, int passlen,
     HMAC_CTX_cleanup(&hctx_tpl);
     return 1;
 }
+#endif
 
-/* LCOV_EXCL_START */
-static PyObject *
-_setException(PyObject *exc)
-{
-    unsigned long errcode;
-    const char *lib, *func, *reason;
-
-    errcode = ERR_peek_last_error();
-    if (!errcode) {
-        PyErr_SetString(exc, "unknown reasons");
-        return NULL;
-    }
-    ERR_clear_error();
-
-    lib = ERR_lib_error_string(errcode);
-    func = ERR_func_error_string(errcode);
-    reason = ERR_reason_error_string(errcode);
-
-    if (lib && func) {
-        PyErr_Format(exc, "[%s: %s] %s", lib, func, reason);
-    }
-    else if (lib) {
-        PyErr_Format(exc, "[%s] %s", lib, reason);
-    }
-    else {
-        PyErr_SetString(exc, reason);
-    }
-    return NULL;
-}
-/* LCOV_EXCL_STOP */
 
 PyDoc_STRVAR(pbkdf2_hmac__doc__,
 "pbkdf2_hmac(hash_name, password, salt, iterations, dklen=None) -> key\n\
@@ -646,10 +686,17 @@ pbkdf2_hmac(PyObject *self, PyObject *args, PyObject *kwdict)
     key = PyBytes_AS_STRING(key_obj);
 
     Py_BEGIN_ALLOW_THREADS
+#if HAS_FAST_PKCS5_PBKDF2_HMAC
+    retval = PKCS5_PBKDF2_HMAC((char*)password.buf, (int)password.len,
+                               (unsigned char *)salt.buf, (int)salt.len,
+                               iterations, digest, dklen,
+                               (unsigned char *)key);
+#else
     retval = PKCS5_PBKDF2_HMAC_fast((char*)password.buf, (int)password.len,
                                     (unsigned char *)salt.buf, (int)salt.len,
                                     iterations, digest, dklen,
                                     (unsigned char *)key);
+#endif
     Py_END_ALLOW_THREADS
 
     if (!retval) {
@@ -768,7 +815,7 @@ generate_hash_name_list(void)
     if (CONST_ ## NAME ## _name_obj == NULL) { \
         CONST_ ## NAME ## _name_obj = PyUnicode_FromString(#NAME); \
         if (EVP_get_digestbyname(#NAME)) { \
-            CONST_new_ ## NAME ## _ctx_p = &CONST_new_ ## NAME ## _ctx; \
+            CONST_new_ ## NAME ## _ctx_p = EVP_MD_CTX_new(); \
             EVP_DigestInit(CONST_new_ ## NAME ## _ctx_p, EVP_get_digestbyname(#NAME)); \
         } \
     } \
diff --git a/Modules/_ssl.c b/Modules/_ssl.c
index 391034e..bb40051 100644
--- a/Modules/_ssl.c
+++ b/Modules/_ssl.c
@@ -55,6 +55,14 @@ static PySocketModule_APIObject PySocketModule;
 #include <sys/poll.h>
 #endif
 
+/* Don't warn about deprecated functions */
+#ifdef __GNUC__
+#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
+#endif
+#ifdef __clang__
+#pragma clang diagnostic ignored "-Wdeprecated-declarations"
+#endif
+
 /* Include OpenSSL header files */
 #include "openssl/rsa.h"
 #include "openssl/crypto.h"
@@ -91,6 +99,10 @@ struct py_ssl_library_code {
 /* Include generated data (error codes) */
 #include "_ssl_data.h"
 
+#if (OPENSSL_VERSION_NUMBER >= 0x10100000L) && !defined(LIBRESSL_VERSION_NUMBER)
+#  define OPENSSL_VERSION_1_1 1
+#endif
+
 /* Openssl comes with TLSv1.1 and TLSv1.2 between 1.0.0h and 1.0.1
     http://www.openssl.org/news/changelog.html
  */
@@ -117,6 +129,72 @@ struct py_ssl_library_code {
 #define INVALID_SOCKET (-1)
 #endif
 
+#ifdef OPENSSL_VERSION_1_1
+/* OpenSSL 1.1.0+ */
+#ifndef OPENSSL_NO_SSL2
+#define OPENSSL_NO_SSL2
+#endif
+#else /* OpenSSL < 1.1.0 */
+#if defined(WITH_THREAD)
+#define HAVE_OPENSSL_CRYPTO_LOCK
+#endif
+
+#define TLS_method SSLv23_method
+
+static int X509_NAME_ENTRY_set(const X509_NAME_ENTRY *ne)
+{
+    return ne->set;
+}
+
+#ifndef OPENSSL_NO_COMP
+static int COMP_get_type(const COMP_METHOD *meth)
+{
+    return meth->type;
+}
+
+static const char *COMP_get_name(const COMP_METHOD *meth)
+{
+    return meth->name;
+}
+#endif
+
+static pem_password_cb *SSL_CTX_get_default_passwd_cb(SSL_CTX *ctx)
+{
+    return ctx->default_passwd_callback;
+}
+
+static void *SSL_CTX_get_default_passwd_cb_userdata(SSL_CTX *ctx)
+{
+    return ctx->default_passwd_callback_userdata;
+}
+
+static int X509_OBJECT_get_type(X509_OBJECT *x)
+{
+    return x->type;
+}
+
+static X509 *X509_OBJECT_get0_X509(X509_OBJECT *x)
+{
+    return x->data.x509;
+}
+
+static int BIO_up_ref(BIO *b)
+{
+    CRYPTO_add(&b->references, 1, CRYPTO_LOCK_BIO);
+    return 1;
+}
+
+static STACK_OF(X509_OBJECT) *X509_STORE_get0_objects(X509_STORE *store) {
+    return store->objs;
+}
+
+static X509_VERIFY_PARAM *X509_STORE_get0_param(X509_STORE *store)
+{
+    return store->param;
+}
+#endif /* OpenSSL < 1.1.0 or LibreSSL */
+
+
 enum py_ssl_error {
     /* these mirror ssl.h */
     PY_SSL_ERROR_NONE,
@@ -147,7 +225,7 @@ enum py_ssl_cert_requirements {
 enum py_ssl_version {
     PY_SSL_VERSION_SSL2,
     PY_SSL_VERSION_SSL3=1,
-    PY_SSL_VERSION_SSL23,
+    PY_SSL_VERSION_TLS,
 #if HAVE_TLSv1_2
     PY_SSL_VERSION_TLS1,
     PY_SSL_VERSION_TLS1_1,
@@ -527,8 +605,8 @@ newPySSLSocket(PySSLContext *sslctx, PySocketSockObject *sock,
         /* BIOs are reference counted and SSL_set_bio borrows our reference.
          * To prevent a double free in memory_bio_dealloc() we need to take an
          * extra reference here. */
-        CRYPTO_add(&inbio->bio->references, 1, CRYPTO_LOCK_BIO);
-        CRYPTO_add(&outbio->bio->references, 1, CRYPTO_LOCK_BIO);
+        BIO_up_ref(inbio->bio);
+        BIO_up_ref(outbio->bio);
         SSL_set_bio(self->ssl, inbio->bio, outbio->bio);
     }
     mode = SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER;
@@ -738,7 +816,7 @@ _create_tuple_for_X509_NAME (X509_NAME *xname)
 
         /* check to see if we've gotten to a new RDN */
         if (rdn_level >= 0) {
-            if (rdn_level != entry->set) {
+            if (rdn_level != X509_NAME_ENTRY_set(entry)) {
                 /* yes, new RDN */
                 /* add old RDN to DN */
                 rdnt = PyList_AsTuple(rdn);
@@ -755,7 +833,7 @@ _create_tuple_for_X509_NAME (X509_NAME *xname)
                     goto fail0;
             }
         }
-        rdn_level = entry->set;
+        rdn_level = X509_NAME_ENTRY_set(entry);
 
         /* now add this attribute to the current RDN */
         name = X509_NAME_ENTRY_get_object(entry);
@@ -853,18 +931,18 @@ _get_peer_alt_names (X509 *certificate) {
             goto fail;
         }
 
-        p = ext->value->data;
+        p = X509_EXTENSION_get_data(ext)->data;
         if (method->it)
             names = (GENERAL_NAMES*)
               (ASN1_item_d2i(NULL,
                              &p,
-                             ext->value->length,
+                             X509_EXTENSION_get_data(ext)->length,
                              ASN1_ITEM_ptr(method->it)));
         else
             names = (GENERAL_NAMES*)
               (method->d2i(NULL,
                            &p,
-                           ext->value->length));
+                           X509_EXTENSION_get_data(ext)->length));
 
         for(j = 0; j < sk_GENERAL_NAME_num(names); j++) {
             /* get a rendering of each name in the set of names */
@@ -1075,13 +1153,11 @@ _get_crl_dp(X509 *certificate) {
     int i, j;
     PyObject *lst, *res = NULL;
 
-#if OPENSSL_VERSION_NUMBER < 0x10001000L
-    dps = X509_get_ext_d2i(certificate, NID_crl_distribution_points, NULL, NULL);
-#else
+#if OPENSSL_VERSION_NUMBER >= 0x10001000L
     /* Calls x509v3_cache_extensions and sets up crldp */
     X509_check_ca(certificate);
-    dps = certificate->crldp;
 #endif
+    dps = X509_get_ext_d2i(certificate, NID_crl_distribution_points, NULL, NULL);
 
     if (dps == NULL)
         return Py_None;
@@ -1451,14 +1527,13 @@ static PyObject *
 _ssl__SSLSocket_shared_ciphers_impl(PySSLSocket *self)
 /*[clinic end generated code: output=3d174ead2e42c4fd input=0bfe149da8fe6306]*/
 {
-    SSL_SESSION *sess = SSL_get_session(self->ssl);
     STACK_OF(SSL_CIPHER) *ciphers;
     int i;
     PyObject *res;
 
-    if (!sess || !sess->ciphers)
+    ciphers = SSL_get_ciphers(self->ssl);
+    if (!ciphers)
         Py_RETURN_NONE;
-    ciphers = sess->ciphers;
     res = PyList_New(sk_SSL_CIPHER_num(ciphers));
     if (!res)
         return NULL;
@@ -1567,9 +1642,9 @@ _ssl__SSLSocket_compression_impl(PySSLSocket *self)
     if (self->ssl == NULL)
         Py_RETURN_NONE;
     comp_method = SSL_get_current_compression(self->ssl);
-    if (comp_method == NULL || comp_method->type == NID_undef)
+    if (comp_method == NULL || COMP_get_type(comp_method) == NID_undef)
         Py_RETURN_NONE;
-    short_name = OBJ_nid2sn(comp_method->type);
+    short_name = COMP_get_name(comp_method);
     if (short_name == NULL)
         Py_RETURN_NONE;
     return PyUnicode_DecodeFSDefault(short_name);
@@ -2255,8 +2330,8 @@ _ssl__SSLContext_impl(PyTypeObject *type, int proto_version)
     else if (proto_version == PY_SSL_VERSION_SSL2)
         ctx = SSL_CTX_new(SSLv2_method());
 #endif
-    else if (proto_version == PY_SSL_VERSION_SSL23)
-        ctx = SSL_CTX_new(SSLv23_method());
+    else if (proto_version == PY_SSL_VERSION_TLS)
+        ctx = SSL_CTX_new(TLS_method());
     else
         proto_version = -1;
     PySSL_END_ALLOW_THREADS
@@ -2318,8 +2393,9 @@ _ssl__SSLContext_impl(PyTypeObject *type, int proto_version)
 #ifndef OPENSSL_NO_ECDH
     /* Allow automatic ECDH curve selection (on OpenSSL 1.0.2+), or use
        prime256v1 by default.  This is Apache mod_ssl's initialization
-       policy, so we should be safe. */
-#if defined(SSL_CTX_set_ecdh_auto)
+       policy, so we should be safe. OpenSSL 1.1 has it enabled by default.
+     */
+#if defined(SSL_CTX_set_ecdh_auto) && !defined(OPENSSL_VERSION_1_1)
     SSL_CTX_set_ecdh_auto(self->ctx, 1);
 #else
     {
@@ -2586,10 +2662,12 @@ static PyObject *
 get_verify_flags(PySSLContext *self, void *c)
 {
     X509_STORE *store;
+    X509_VERIFY_PARAM *param;
     unsigned long flags;
 
     store = SSL_CTX_get_cert_store(self->ctx);
-    flags = X509_VERIFY_PARAM_get_flags(store->param);
+    param = X509_STORE_get0_param(store);
+    flags = X509_VERIFY_PARAM_get_flags(param);
     return PyLong_FromUnsignedLong(flags);
 }
 
@@ -2597,22 +2675,24 @@ static int
 set_verify_flags(PySSLContext *self, PyObject *arg, void *c)
 {
     X509_STORE *store;
+    X509_VERIFY_PARAM *param;
     unsigned long new_flags, flags, set, clear;
 
     if (!PyArg_Parse(arg, "k", &new_flags))
         return -1;
     store = SSL_CTX_get_cert_store(self->ctx);
-    flags = X509_VERIFY_PARAM_get_flags(store->param);
+    param = X509_STORE_get0_param(store);
+    flags = X509_VERIFY_PARAM_get_flags(param);
     clear = flags & ~new_flags;
     set = ~flags & new_flags;
     if (clear) {
-        if (!X509_VERIFY_PARAM_clear_flags(store->param, clear)) {
+        if (!X509_VERIFY_PARAM_clear_flags(param, clear)) {
             _setSSLError(NULL, 0, __FILE__, __LINE__);
             return -1;
         }
     }
     if (set) {
-        if (!X509_VERIFY_PARAM_set_flags(store->param, set)) {
+        if (!X509_VERIFY_PARAM_set_flags(param, set)) {
             _setSSLError(NULL, 0, __FILE__, __LINE__);
             return -1;
         }
@@ -2789,8 +2869,8 @@ _ssl__SSLContext_load_cert_chain_impl(PySSLContext *self, PyObject *certfile,
 /*[clinic end generated code: output=9480bc1c380e2095 input=7cf9ac673cbee6fc]*/
 {
     PyObject *certfile_bytes = NULL, *keyfile_bytes = NULL;
-    pem_password_cb *orig_passwd_cb = self->ctx->default_passwd_callback;
-    void *orig_passwd_userdata = self->ctx->default_passwd_callback_userdata;
+    pem_password_cb *orig_passwd_cb = SSL_CTX_get_default_passwd_cb(self->ctx);
+    void *orig_passwd_userdata = SSL_CTX_get_default_passwd_cb_userdata(self->ctx);
     _PySSLPasswordInfo pw_info = { NULL, NULL, NULL, 0, 0 };
     int r;
 
@@ -2917,8 +2997,9 @@ _add_ca_certs(PySSLContext *self, void *data, Py_ssize_t len,
             cert = d2i_X509_bio(biobuf, NULL);
         } else {
             cert = PEM_read_bio_X509(biobuf, NULL,
-                                     self->ctx->default_passwd_callback,
-                                     self->ctx->default_passwd_callback_userdata);
+                                     SSL_CTX_get_default_passwd_cb(self->ctx),
+                                     SSL_CTX_get_default_passwd_cb_userdata(self->ctx)
+                                    );
         }
         if (cert == NULL) {
             break;
@@ -3444,25 +3525,24 @@ _ssl__SSLContext_cert_store_stats_impl(PySSLContext *self)
 /*[clinic end generated code: output=5f356f4d9cca874d input=eb40dd0f6d0e40cf]*/
 {
     X509_STORE *store;
+    STACK_OF(X509_OBJECT) *objs;
     X509_OBJECT *obj;
-    int x509 = 0, crl = 0, pkey = 0, ca = 0, i;
+    int x509 = 0, crl = 0, ca = 0, i;
 
     store = SSL_CTX_get_cert_store(self->ctx);
-    for (i = 0; i < sk_X509_OBJECT_num(store->objs); i++) {
-        obj = sk_X509_OBJECT_value(store->objs, i);
-        switch (obj->type) {
+    objs = X509_STORE_get0_objects(store);
+    for (i = 0; i < sk_X509_OBJECT_num(objs); i++) {
+        obj = sk_X509_OBJECT_value(objs, i);
+        switch (X509_OBJECT_get_type(obj)) {
             case X509_LU_X509:
                 x509++;
-                if (X509_check_ca(obj->data.x509)) {
+                if (X509_check_ca(X509_OBJECT_get0_X509(obj))) {
                     ca++;
                 }
                 break;
             case X509_LU_CRL:
                 crl++;
                 break;
-            case X509_LU_PKEY:
-                pkey++;
-                break;
             default:
                 /* Ignore X509_LU_FAIL, X509_LU_RETRY, X509_LU_PKEY.
                  * As far as I can tell they are internal states and never
@@ -3492,6 +3572,7 @@ _ssl__SSLContext_get_ca_certs_impl(PySSLContext *self, int binary_form)
 /*[clinic end generated code: output=0d58f148f37e2938 input=6887b5a09b7f9076]*/
 {
     X509_STORE *store;
+    STACK_OF(X509_OBJECT) *objs;
     PyObject *ci = NULL, *rlist = NULL;
     int i;
 
@@ -3500,17 +3581,18 @@ _ssl__SSLContext_get_ca_certs_impl(PySSLContext *self, int binary_form)
     }
 
     store = SSL_CTX_get_cert_store(self->ctx);
-    for (i = 0; i < sk_X509_OBJECT_num(store->objs); i++) {
+    objs = X509_STORE_get0_objects(store);
+    for (i = 0; i < sk_X509_OBJECT_num(objs); i++) {
         X509_OBJECT *obj;
         X509 *cert;
 
-        obj = sk_X509_OBJECT_value(store->objs, i);
-        if (obj->type != X509_LU_X509) {
+        obj = sk_X509_OBJECT_value(objs, i);
+        if (X509_OBJECT_get_type(obj) != X509_LU_X509) {
             /* not a x509 cert */
             continue;
         }
         /* CA for any purpose */
-        cert = obj->data.x509;
+        cert = X509_OBJECT_get0_X509(obj);
         if (!X509_check_ca(cert)) {
             continue;
         }
@@ -4374,10 +4456,12 @@ static PyMethodDef PySSL_methods[] = {
 };
 
 
-#ifdef WITH_THREAD
+#ifdef HAVE_OPENSSL_CRYPTO_LOCK
 
 /* an implementation of OpenSSL threading operations in terms
-   of the Python C thread library */
+ * of the Python C thread library
+ * Only used up to 1.0.2. OpenSSL 1.1.0+ has its own locking code.
+ */
 
 static PyThread_type_lock *_ssl_locks = NULL;
 
@@ -4458,7 +4542,7 @@ static int _setup_ssl_threads(void) {
     return 1;
 }
 
-#endif  /* def HAVE_THREAD */
+#endif  /* HAVE_OPENSSL_CRYPTO_LOCK for WITH_THREAD && OpenSSL < 1.1.0 */
 
 PyDoc_STRVAR(module_doc,
 "Implementation module for SSL socket operations.  See the socket module\n\
@@ -4527,11 +4611,16 @@ PyInit__ssl(void)
     SSL_load_error_strings();
     SSL_library_init();
 #ifdef WITH_THREAD
+#ifdef HAVE_OPENSSL_CRYPTO_LOCK
     /* note that this will start threading if not already started */
     if (!_setup_ssl_threads()) {
         return NULL;
     }
+#elif OPENSSL_VERSION_1_1 && defined(OPENSSL_THREADS)
+    /* OpenSSL 1.1.0 builtin thread support is enabled */
+    _ssl_locks_count++;
 #endif
+#endif  /* WITH_THREAD */
     OpenSSL_add_all_algorithms();
 
     /* Add symbols to module dict */
@@ -4678,7 +4767,9 @@ PyInit__ssl(void)
                             PY_SSL_VERSION_SSL3);
 #endif
     PyModule_AddIntConstant(m, "PROTOCOL_SSLv23",
-                            PY_SSL_VERSION_SSL23);
+                            PY_SSL_VERSION_TLS);
+    PyModule_AddIntConstant(m, "PROTOCOL_TLS",
+                            PY_SSL_VERSION_TLS);
     PyModule_AddIntConstant(m, "PROTOCOL_TLSv1",
                             PY_SSL_VERSION_TLS1);
 #if HAVE_TLSv1_2