File CVE-2024-5642-OpenSSL-API-buf-overread-NPN.patch of Package python39

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File CVE-2024-5642-OpenSSL-API-buf-overread-NPN.patch of Package python39 (Revision 7af144b34211cf76367bc17d996393de)

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From 3ddf7fa83b19463e710b75ae6e8a28831e575f3d Mon Sep 17 00:00:00 2001
From: Christian Heimes <christian@python.org>
Date: Wed, 28 Oct 2020 09:26:39 +0100
Subject: [PATCH] PEP-644: Require OpenSSL 1.1.1 or newer

- Remove HAVE_X509_VERIFY_PARAM_SET1_HOST check
- Update hashopenssl to require OpenSSL 1.1.1
- multissltests only OpenSSL > 1.1.0
- ALPN is always supported
- SNI is always supported
- Remove deprecated NPN code. Python wrappers are no-op.
- ECDH is always supported
- Remove OPENSSL_VERSION_1_1 macro
- Remove locking callbacks
- Drop PY_OPENSSL_1_1_API macro
- Drop HAVE_SSL_CTX_CLEAR_OPTIONS macro
- SSL_CTRL_GET_MAX_PROTO_VERSION is always defined now
- security level is always available now
- get_num_tickets is available with TLS 1.3
- X509_V_ERR MISMATCH is always available now
- Always set SSL_MODE_RELEASE_BUFFERS
- X509_V_FLAG_TRUSTED_FIRST is always available
- get_ciphers is always supported
- SSL_CTX_set_keylog_callback is always available
- Update Modules/Setup with static link example
- Mention PEP in whatsnew
- Drop 1.0.2 and 1.1.0 from GHA tests
---
 Doc/using/unix.rst                                              |    1 
 Lib/ssl.py                                                      |   10 
 Lib/test/test_ssl.py                                            |  119 --
 Misc/NEWS.d/next/Build/2021-03-30-14-19-39.bpo-43669.lWMUYx.rst |    1 
 Modules/Setup                                                   |   22 
 Modules/_hashopenssl.c                                          |  108 --
 Modules/_ssl.c                                                  |  518 ----------
 Modules/_ssl/debughelpers.c                                     |    4 
 Modules/clinic/_hashopenssl.c.h                                 |   11 
 Modules/clinic/_ssl.c.h                                         |   85 -
 Tools/ssl/multissltests.py                                      |    4 
 configure                                                       |    9 
 configure.ac                                                    |   36 
 pyconfig.h.in                                                   |    3 
 setup.py                                                        |   19 
 15 files changed, 77 insertions(+), 873 deletions(-)
 create mode 100644 Misc/NEWS.d/next/Build/2021-03-30-14-19-39.bpo-43669.lWMUYx.rst

--- a/Doc/using/unix.rst
+++ b/Doc/using/unix.rst
@@ -113,6 +113,7 @@ For example, on most Linux systems, the
 |                                               | embedding the interpreter.               |
 +-----------------------------------------------+------------------------------------------+
 
+.. _unix_custom_openssl:
 
 Miscellaneous
 =============
--- a/Lib/ssl.py
+++ b/Lib/ssl.py
@@ -910,15 +910,12 @@ class SSLObject:
         """Return the currently selected NPN protocol as a string, or ``None``
         if a next protocol was not negotiated or if NPN is not supported by one
         of the peers."""
-        if _ssl.HAS_NPN:
-            return self._sslobj.selected_npn_protocol()
 
     def selected_alpn_protocol(self):
         """Return the currently selected ALPN protocol as a string, or ``None``
         if a next protocol was not negotiated or if ALPN is not supported by one
         of the peers."""
-        if _ssl.HAS_ALPN:
-            return self._sslobj.selected_alpn_protocol()
+        return self._sslobj.selected_alpn_protocol()
 
     def cipher(self):
         """Return the currently selected cipher as a 3-tuple ``(name,
@@ -1160,10 +1157,7 @@ class SSLSocket(socket):
     @_sslcopydoc
     def selected_npn_protocol(self):
         self._checkClosed()
-        if self._sslobj is None or not _ssl.HAS_NPN:
-            return None
-        else:
-            return self._sslobj.selected_npn_protocol()
+        return None
 
     @_sslcopydoc
     def selected_alpn_protocol(self):
--- a/Lib/test/test_ssl.py
+++ b/Lib/test/test_ssl.py
@@ -39,7 +39,6 @@ Py_DEBUG_WIN32 = Py_DEBUG and sys.platfo
 PROTOCOLS = sorted(ssl._PROTOCOL_NAMES)
 HOST = socket_helper.HOST
 IS_LIBRESSL = ssl.OPENSSL_VERSION.startswith('LibreSSL')
-IS_OPENSSL_1_1_0 = not IS_LIBRESSL and ssl.OPENSSL_VERSION_INFO >= (1, 1, 0)
 IS_OPENSSL_1_1_1 = not IS_LIBRESSL and ssl.OPENSSL_VERSION_INFO >= (1, 1, 1)
 IS_OPENSSL_3_0_0 = not IS_LIBRESSL and ssl.OPENSSL_VERSION_INFO >= (3, 0, 0)
 PY_SSL_DEFAULT_CIPHERS = sysconfig.get_config_var('PY_SSL_DEFAULT_CIPHERS')
@@ -269,18 +268,6 @@ def handle_error(prefix):
     if support.verbose:
         sys.stdout.write(prefix + exc_format)
 
-def can_clear_options():
-    # 0.9.8m or higher
-    return ssl._OPENSSL_API_VERSION >= (0, 9, 8, 13, 15)
-
-def no_sslv2_implies_sslv3_hello():
-    # 0.9.7h or higher
-    return ssl.OPENSSL_VERSION_INFO >= (0, 9, 7, 8, 15)
-
-def have_verify_flags():
-    # 0.9.8 or higher
-    return ssl.OPENSSL_VERSION_INFO >= (0, 9, 8, 0, 15)
-
 def _have_secp_curves():
     if not ssl.HAS_ECDH:
         return False
@@ -371,17 +358,15 @@ class BasicSocketTests(unittest.TestCase
         ssl.OP_SINGLE_DH_USE
         if ssl.HAS_ECDH:
             ssl.OP_SINGLE_ECDH_USE
-        if ssl.OPENSSL_VERSION_INFO >= (1, 0):
-            ssl.OP_NO_COMPRESSION
+        ssl.OP_NO_COMPRESSION
         self.assertIn(ssl.HAS_SNI, {True, False})
         self.assertIn(ssl.HAS_ECDH, {True, False})
         ssl.OP_NO_SSLv2
         ssl.OP_NO_SSLv3
         ssl.OP_NO_TLSv1
         ssl.OP_NO_TLSv1_3
-        if ssl.OPENSSL_VERSION_INFO >= (1, 0, 1):
-            ssl.OP_NO_TLSv1_1
-            ssl.OP_NO_TLSv1_2
+        ssl.OP_NO_TLSv1_1
+        ssl.OP_NO_TLSv1_2
         self.assertEqual(ssl.PROTOCOL_TLS, ssl.PROTOCOL_SSLv23)
 
     def test_private_init(self):
@@ -1169,7 +1154,6 @@ class ContextTests(unittest.TestCase):
             self.assertNotIn("RC4", name)
             self.assertNotIn("3DES", name)
 
-    @unittest.skipIf(ssl.OPENSSL_VERSION_INFO < (1, 0, 2, 0, 0), 'OpenSSL too old')
     def test_get_ciphers(self):
         ctx = ssl.SSLContext(ssl.PROTOCOL_TLS_CLIENT)
         ctx.set_ciphers('AESGCM')
@@ -1201,15 +1185,11 @@ class ContextTests(unittest.TestCase):
         self.assertEqual(default, ctx.options)
         ctx.options |= ssl.OP_NO_TLSv1
         self.assertEqual(default | ssl.OP_NO_TLSv1, ctx.options)
-        if can_clear_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)
-        else:
-            with self.assertRaises(ValueError):
-                ctx.options = 0
+        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)
 
     def test_verify_mode_protocol(self):
         ctx = ssl.SSLContext(ssl.PROTOCOL_TLS)
@@ -1328,8 +1308,6 @@ class ContextTests(unittest.TestCase):
             with self.assertRaises(ValueError):
                 ctx.maximum_version = ssl.TLSVersion.TLSv1
 
-    @unittest.skipUnless(have_verify_flags(),
-                         "verify_flags need OpenSSL > 0.9.8")
     def test_verify_flags(self):
         ctx = ssl.SSLContext(ssl.PROTOCOL_TLS_SERVER)
         # default value
@@ -1807,7 +1785,6 @@ class ContextTests(unittest.TestCase):
         obj = ctx.wrap_bio(ssl.MemoryBIO(), ssl.MemoryBIO())
         self.assertIsInstance(obj, MySSLObject)
 
-    @unittest.skipUnless(IS_OPENSSL_1_1_1, "Test requires OpenSSL 1.1.1")
     def test_num_tickest(self):
         ctx = ssl.SSLContext(ssl.PROTOCOL_TLS_SERVER)
         self.assertEqual(ctx.num_tickets, 2)
@@ -2972,8 +2949,6 @@ class ThreadedTests(unittest.TestCase):
                 after = ssl.cert_time_to_seconds(cert['notAfter'])
                 self.assertLess(before, after)
 
-    @unittest.skipUnless(have_verify_flags(),
-                        "verify_flags need OpenSSL > 0.9.8")
     def test_crl_check(self):
         if support.verbose:
             sys.stdout.write("\n")
@@ -3877,12 +3852,7 @@ class ThreadedTests(unittest.TestCase):
                 self.assertIs(s.version(), None)
                 self.assertIs(s._sslobj, None)
                 s.connect((HOST, server.port))
-                if IS_OPENSSL_1_1_1 and has_tls_version('TLSv1_3'):
-                    self.assertEqual(s.version(), 'TLSv1.3')
-                elif ssl.OPENSSL_VERSION_INFO >= (1, 0, 2):
-                    self.assertEqual(s.version(), 'TLSv1.2')
-                else:  # 0.9.8 to 1.0.1
-                    self.assertIn(s.version(), ('TLSv1', 'TLSv1.2'))
+                self.assertEqual(s.version(), 'TLSv1.3')
             self.assertIs(s._sslobj, None)
             self.assertIs(s.version(), None)
 
@@ -3984,8 +3954,6 @@ class ThreadedTests(unittest.TestCase):
         # explicitly using the 'ECCdraft' cipher alias.  Otherwise,
         # our default cipher list should prefer ECDH-based ciphers
         # automatically.
-        if ssl.OPENSSL_VERSION_INFO < (1, 0, 0):
-            context.set_ciphers("ECCdraft:ECDH")
         with ThreadedEchoServer(context=context) as server:
             with context.wrap_socket(socket.socket()) as s:
                 s.connect((HOST, server.port))
@@ -4117,15 +4085,11 @@ class ThreadedTests(unittest.TestCase):
         server_context.set_ciphers("ECDHE:!eNULL:!aNULL")
         server_context.options |= ssl.OP_NO_TLSv1 | ssl.OP_NO_TLSv1_1
         try:
-            stats = server_params_test(client_context, server_context,
-                                       chatty=True, connectionchatty=True,
-                                       sni_name=hostname)
+            server_params_test(client_context, server_context,
+                               chatty=True, connectionchatty=True,
+                               sni_name=hostname)
         except ssl.SSLError:
-            pass
-        else:
-            # OpenSSL 1.0.2 does not fail although it should.
-            if IS_OPENSSL_1_1_0:
-                self.fail("mismatch curve did not fail")
+            self.fail("mismatch curve did not fail")
 
     def test_selected_alpn_protocol(self):
         # selected_alpn_protocol() is None unless ALPN is used.
@@ -4135,7 +4099,6 @@ class ThreadedTests(unittest.TestCase):
                                    sni_name=hostname)
         self.assertIs(stats['client_alpn_protocol'], None)
 
-    @unittest.skipUnless(ssl.HAS_ALPN, "ALPN support required")
     def test_selected_alpn_protocol_if_server_uses_alpn(self):
         # selected_alpn_protocol() is None unless ALPN is used by the client.
         client_context, server_context, hostname = testing_context()
@@ -4145,7 +4108,6 @@ class ThreadedTests(unittest.TestCase):
                                    sni_name=hostname)
         self.assertIs(stats['client_alpn_protocol'], None)
 
-    @unittest.skipUnless(ssl.HAS_ALPN, "ALPN support needed for this test")
     def test_alpn_protocols(self):
         server_protocols = ['foo', 'bar', 'milkshake']
         protocol_tests = [
@@ -4168,22 +4130,17 @@ class ThreadedTests(unittest.TestCase):
             except ssl.SSLError as e:
                 stats = e
 
-            if (expected is None and IS_OPENSSL_1_1_0
-                    and ssl.OPENSSL_VERSION_INFO < (1, 1, 0, 6)):
-                # OpenSSL 1.1.0 to 1.1.0e 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"))
+            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
@@ -4193,31 +4150,8 @@ class ThreadedTests(unittest.TestCase):
                                    sni_name=hostname)
         self.assertIs(stats['client_npn_protocol'], None)
 
-    @unittest.skipUnless(ssl.HAS_NPN, "NPN support needed for this test")
     def test_npn_protocols(self):
-        server_protocols = ['http/1.1', 'spdy/2']
-        protocol_tests = [
-            (['http/1.1', 'spdy/2'], 'http/1.1'),
-            (['spdy/2', 'http/1.1'], 'http/1.1'),
-            (['spdy/2', 'test'], 'spdy/2'),
-            (['abc', 'def'], 'abc')
-        ]
-        for client_protocols, expected in protocol_tests:
-            client_context, server_context, hostname = testing_context()
-            server_context.set_npn_protocols(server_protocols)
-            client_context.set_npn_protocols(client_protocols)
-            stats = server_params_test(client_context, server_context,
-                                       chatty=True, connectionchatty=True,
-                                       sni_name=hostname)
-            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_npn_protocol']
-            self.assertEqual(client_result, expected, msg % (client_result, "client"))
-            server_result = stats['server_npn_protocols'][-1] \
-                if len(stats['server_npn_protocols']) else 'nothing'
-            self.assertEqual(server_result, expected, msg % (server_result, "server"))
+        assert not ssl.HAS_NPN
 
     def sni_contexts(self):
         server_context = ssl.SSLContext(ssl.PROTOCOL_TLS_SERVER)
@@ -4387,8 +4321,7 @@ class ThreadedTests(unittest.TestCase):
         self.assertGreater(session.time, 0)
         self.assertGreater(session.timeout, 0)
         self.assertTrue(session.has_ticket)
-        if ssl.OPENSSL_VERSION_INFO > (1, 0, 1):
-            self.assertGreater(session.ticket_lifetime_hint, 0)
+        self.assertGreater(session.ticket_lifetime_hint, 0)
         self.assertFalse(stats['session_reused'])
         sess_stat = server_context.session_stats()
         self.assertEqual(sess_stat['accept'], 1)
--- /dev/null
+++ b/Misc/NEWS.d/next/Build/2021-03-30-14-19-39.bpo-43669.lWMUYx.rst
@@ -0,0 +1 @@
+Implement :pep:`644`. Python now requires OpenSSL 1.1.1 or newer.
--- a/Modules/Setup
+++ b/Modules/Setup
@@ -210,11 +210,23 @@ _symtable symtablemodule.c
 #_socket socketmodule.c
 
 # Socket module helper for SSL support; you must comment out the other
-# socket line above, and possibly edit the SSL variable:
-#SSL=/usr/local/ssl
-#_ssl _ssl.c \
-#	-DUSE_SSL -I$(SSL)/include -I$(SSL)/include/openssl \
-#	-L$(SSL)/lib -lssl -lcrypto
+# socket line above, and edit the OPENSSL variable:
+# OPENSSL=/path/to/openssl/directory
+# _ssl _ssl.c \
+#     -I$(OPENSSL)/include -L$(OPENSSL)/lib \
+#     -lssl -lcrypto
+#_hashlib _hashopenssl.c \
+#     -I$(OPENSSL)/include -L$(OPENSSL)/lib \
+#     -lcrypto
+
+# To statically link OpenSSL:
+# _ssl _ssl.c \
+#     -I$(OPENSSL)/include -L$(OPENSSL)/lib \
+#     -l:libssl.a -Wl,--exclude-libs,libssl.a \
+#     -l:libcrypto.a -Wl,--exclude-libs,libcrypto.a
+#_hashlib _hashopenssl.c \
+#     -I$(OPENSSL)/include -L$(OPENSSL)/lib \
+#     -l:libcrypto.a -Wl,--exclude-libs,libcrypto.a
 
 # The crypt module is now disabled by default because it breaks builds
 # on many systems (where -lcrypt is needed), e.g. Linux (I believe).
--- a/Modules/_hashopenssl.c
+++ b/Modules/_hashopenssl.c
@@ -43,51 +43,12 @@
 #  error "OPENSSL_THREADS is not defined, Python requires thread-safe OpenSSL"
 #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
-
-HMAC_CTX *
-HMAC_CTX_new(void)
-{
-    HMAC_CTX *ctx = OPENSSL_malloc(sizeof(HMAC_CTX));
-    if (ctx != NULL) {
-        memset(ctx, 0, sizeof(HMAC_CTX));
-        HMAC_CTX_init(ctx);
-    }
-    return ctx;
-}
-
-void
-HMAC_CTX_free(HMAC_CTX *ctx)
-{
-    if (ctx != NULL) {
-        HMAC_CTX_cleanup(ctx);
-        OPENSSL_free(ctx);
-    }
-}
-
-const EVP_MD *
-HMAC_CTX_get_md(const HMAC_CTX *ctx)
-{
-    return ctx->md;
-}
-#endif
-
 #define MUNCH_SIZE INT_MAX
 
-#ifdef NID_sha3_224
+#define PY_OPENSSL_HAS_SCRYPT 1
 #define PY_OPENSSL_HAS_SHA3 1
-#endif
-
-#if defined(EVP_MD_FLAG_XOF) && defined(NID_shake128)
 #define PY_OPENSSL_HAS_SHAKE 1
-#endif
-
-#if defined(NID_blake2b512) && !defined(OPENSSL_NO_BLAKE2)
 #define PY_OPENSSL_HAS_BLAKE2 1
-#endif
 
 #if OPENSSL_VERSION_NUMBER >= 0x30000000L
 #define PY_EVP_MD EVP_MD
@@ -1311,8 +1272,7 @@ pbkdf2_hmac_impl(PyObject *module, const
     return key_obj;
 }
 
-#if OPENSSL_VERSION_NUMBER > 0x10100000L && !defined(OPENSSL_NO_SCRYPT) && !defined(LIBRESSL_VERSION_NUMBER)
-#define PY_SCRYPT 1
+#ifdef PY_OPENSSL_HAS_SCRYPT
 
 /* XXX: Parameters salt, n, r and p should be required keyword-only parameters.
    They are optional in the Argument Clinic declaration only due to a
@@ -1433,7 +1393,7 @@ _hashlib_scrypt_impl(PyObject *module, P
     }
     return key_obj;
 }
-#endif
+#endif  /* PY_OPENSSL_HAS_SCRYPT */
 
 /* Fast HMAC for hmac.digest()
  */
@@ -1920,12 +1880,6 @@ hashlib_md_meth_names(PyObject *module)
     return 0;
 }
 
-/* LibreSSL doesn't support FIPS:
-   https://marc.info/?l=openbsd-misc&m=139819485423701&w=2
-
-   Ted Unangst wrote: "I figured I should mention our current libressl policy
-   wrt FIPS mode.  It's gone and it's not coming back." */
-#ifndef LIBRESSL_VERSION_NUMBER
 /*[clinic input]
 _hashlib.get_fips_mode -> int
 
@@ -1963,7 +1917,6 @@ _hashlib_get_fips_mode_impl(PyObject *mo
     return result;
 #endif
 }
-#endif  // !LIBRESSL_VERSION_NUMBER
 
 
 static int
@@ -2144,17 +2097,6 @@ hashlib_free(void *m)
 
 /* Py_mod_exec functions */
 static int
-hashlib_openssl_legacy_init(PyObject *module)
-{
-#if (OPENSSL_VERSION_NUMBER < 0x10100000L) || defined(LIBRESSL_VERSION_NUMBER)
-    /* Load all digest algorithms and initialize cpuid */
-    OPENSSL_add_all_algorithms_noconf();
-    ERR_load_crypto_strings();
-#endif
-    return 0;
-}
-
-static int
 hashlib_init_hashtable(PyObject *module)
 {
     _hashlibstate *state = get_hashlib_state(module);
@@ -2227,10 +2169,7 @@ hashlib_init_hmactype(PyObject *module)
     return 0;
 }
 
-#if 0
 static PyModuleDef_Slot hashlib_slots[] = {
-    /* OpenSSL 1.0.2 and LibreSSL */
-    {Py_mod_exec, hashlib_openssl_legacy_init},
     {Py_mod_exec, hashlib_init_hashtable},
     {Py_mod_exec, hashlib_init_evptype},
     {Py_mod_exec, hashlib_init_evpxoftype},
@@ -2238,7 +2177,6 @@ static PyModuleDef_Slot hashlib_slots[]
     {Py_mod_exec, hashlib_md_meth_names},
     {0, NULL}
 };
-#endif
 
 static struct PyModuleDef _hashlibmodule = {
     PyModuleDef_HEAD_INIT,
@@ -2246,7 +2184,7 @@ static struct PyModuleDef _hashlibmodule
     .m_doc = "OpenSSL interface for hashlib module",
     .m_size = sizeof(_hashlibstate),
     .m_methods = EVP_functions,
-    .m_slots = NULL,
+    .m_slots = hashlib_slots,
     .m_traverse = hashlib_traverse,
     .m_clear = hashlib_clear,
     .m_free = hashlib_free
@@ -2255,41 +2193,5 @@ static struct PyModuleDef _hashlibmodule
 PyMODINIT_FUNC
 PyInit__hashlib(void)
 {
-    PyObject *m = PyState_FindModule(&_hashlibmodule);
-    if (m != NULL) {
-        Py_INCREF(m);
-        return m;
-    }
-
-    m = PyModule_Create(&_hashlibmodule);
-    if (m == NULL) {
-        return NULL;
-    }
-
-    if (hashlib_openssl_legacy_init(m) < 0) {
-        Py_DECREF(m);
-        return NULL;
-    }
-    if (hashlib_init_hashtable(m) < 0) {
-        Py_DECREF(m);
-        return NULL;
-    }
-    if (hashlib_init_evptype(m) < 0) {
-        Py_DECREF(m);
-        return NULL;
-    }
-    if (hashlib_init_evpxoftype(m) < 0) {
-        Py_DECREF(m);
-        return NULL;
-    }
-    if (hashlib_init_hmactype(m) < 0) {
-        Py_DECREF(m);
-        return NULL;
-    }
-    if (hashlib_md_meth_names(m) == -1) {
-        Py_DECREF(m);
-        return NULL;
-    }
-
-    return m;
+    return PyModuleDef_Init(&_hashlibmodule);
 }
--- a/Modules/_ssl.c
+++ b/Modules/_ssl.c
@@ -29,9 +29,9 @@
 #define _PySSL_FIX_ERRNO
 
 #define PySSL_BEGIN_ALLOW_THREADS_S(save) \
-    do { if (_ssl_locks_count>0) { (save) = PyEval_SaveThread(); } } while (0)
+    do { (save) = PyEval_SaveThread(); } while(0)
 #define PySSL_END_ALLOW_THREADS_S(save) \
-    do { if (_ssl_locks_count>0) { PyEval_RestoreThread(save); } _PySSL_FIX_ERRNO; } while (0)
+    do { PyEval_RestoreThread(save); _PySSL_FIX_ERRNO; } while(0)
 #define PySSL_BEGIN_ALLOW_THREADS { \
             PyThreadState *_save = NULL;  \
             PySSL_BEGIN_ALLOW_THREADS_S(_save);
@@ -62,16 +62,6 @@ static PySocketModule_APIObject PySocket
 #include "openssl/bio.h"
 #include "openssl/dh.h"
 
-#ifndef HAVE_X509_VERIFY_PARAM_SET1_HOST
-#  ifdef LIBRESSL_VERSION_NUMBER
-#    error "LibreSSL is missing X509_VERIFY_PARAM_set1_host(), see https://github.com/libressl-portable/portable/issues/381"
-#  elif OPENSSL_VERSION_NUMBER > 0x1000200fL
-#    define HAVE_X509_VERIFY_PARAM_SET1_HOST
-#  else
-#    error "libssl is too old and does not support X509_VERIFY_PARAM_set1_host()"
-#  endif
-#endif
-
 #ifndef OPENSSL_THREADS
 #  error "OPENSSL_THREADS is not defined, Python requires thread-safe OpenSSL"
 #endif
@@ -142,15 +132,7 @@ static void _PySSLFixErrno(void) {
 #include "_ssl_data.h"
 #endif
 
-#if (OPENSSL_VERSION_NUMBER >= 0x10100000L) && !defined(LIBRESSL_VERSION_NUMBER)
-#  define OPENSSL_VERSION_1_1 1
-#  define PY_OPENSSL_1_1_API 1
-#endif
-
-/* OpenSSL API 1.1.0+ does not include version methods. Define the methods
- * unless OpenSSL is compiled without the methods. It's the easiest way to
- * make 1.0.2, 1.1.0, 1.1.1, and 3.0.0 happy without deprecation warnings.
- */
+/* OpenSSL API 1.1.0+ does not include version methods */
 #ifndef OPENSSL_NO_TLS1_METHOD
 extern const SSL_METHOD *TLSv1_method(void);
 #endif
@@ -161,59 +143,10 @@ extern const SSL_METHOD *TLSv1_1_method(
 extern const SSL_METHOD *TLSv1_2_method(void);
 #endif
 
-/* LibreSSL 2.7.0 provides necessary OpenSSL 1.1.0 APIs */
-#if defined(LIBRESSL_VERSION_NUMBER) && LIBRESSL_VERSION_NUMBER >= 0x2070000fL
-#  define PY_OPENSSL_1_1_API 1
-#endif
-
-#if (OPENSSL_VERSION_NUMBER >= 0x30300000L) && !defined(LIBRESSL_VERSION_NUMBER)
-#  define OPENSSL_VERSION_3_3 1
-#endif
-
-/* SNI support (client- and server-side) appeared in OpenSSL 1.0.0 and 0.9.8f
- * This includes the SSL_set_SSL_CTX() function.
- */
-#ifdef SSL_CTRL_SET_TLSEXT_HOSTNAME
-# define HAVE_SNI 1
-#else
-# define HAVE_SNI 0
-#endif
-
-#ifdef TLSEXT_TYPE_application_layer_protocol_negotiation
-# define HAVE_ALPN 1
-#else
-# define HAVE_ALPN 0
-#endif
-
-/* We cannot rely on OPENSSL_NO_NEXTPROTONEG because LibreSSL 2.6.1 dropped
- * NPN support but did not set OPENSSL_NO_NEXTPROTONEG for compatibility
- * reasons. The check for TLSEXT_TYPE_next_proto_neg works with
- * OpenSSL 1.0.1+ and LibreSSL.
- * OpenSSL 1.1.1-pre1 dropped NPN but still has TLSEXT_TYPE_next_proto_neg.
- */
-#ifdef OPENSSL_NO_NEXTPROTONEG
-# define HAVE_NPN 0
-#elif (OPENSSL_VERSION_NUMBER >= 0x10101000L) && !defined(LIBRESSL_VERSION_NUMBER)
-# define HAVE_NPN 0
-#elif defined(TLSEXT_TYPE_next_proto_neg)
-# define HAVE_NPN 1
-#else
-# define HAVE_NPN 0
-#endif
-
-#if (OPENSSL_VERSION_NUMBER >= 0x10101000L) && !defined(LIBRESSL_VERSION_NUMBER)
-#define HAVE_OPENSSL_KEYLOG 1
-#endif
-
 #ifndef INVALID_SOCKET /* MS defines this */
 #define INVALID_SOCKET (-1)
 #endif
 
-/* OpenSSL 1.0.2 and LibreSSL needs extra code for locking */
-#ifndef OPENSSL_VERSION_1_1
-#define HAVE_OPENSSL_CRYPTO_LOCK
-#endif
-
 /* OpenSSL 1.1+ allows locking X509_STORE, 1.0.2 doesn't. */
 #ifdef OPENSSL_VERSION_1_1
 #define HAVE_OPENSSL_X509_STORE_LOCK
@@ -224,80 +157,8 @@ extern const SSL_METHOD *TLSv1_2_method(
 #define HAVE_OPENSSL_X509_STORE_GET1_OBJECTS 1
 #endif
 
-#if defined(OPENSSL_VERSION_1_1) && !defined(OPENSSL_NO_SSL2)
+/* OpenSSL 1.1 does not have SSL 2.0 */
 #define OPENSSL_NO_SSL2
-#endif
-
-#ifndef PY_OPENSSL_1_1_API
-/* OpenSSL 1.1 API shims for OpenSSL < 1.1.0 and LibreSSL < 2.7.0 */
-
-#define TLS_method SSLv23_method
-#define TLS_client_method SSLv23_client_method
-#define TLS_server_method SSLv23_server_method
-#define ASN1_STRING_get0_data ASN1_STRING_data
-#define X509_get0_notBefore X509_get_notBefore
-#define X509_get0_notAfter X509_get_notAfter
-#define OpenSSL_version_num SSLeay
-#define OpenSSL_version SSLeay_version
-#define OPENSSL_VERSION SSLEAY_VERSION
-
-static int X509_NAME_ENTRY_set(const X509_NAME_ENTRY *ne)
-{
-    return ne->set;
-}
-
-#ifndef OPENSSL_NO_COMP
-/* LCOV_EXCL_START */
-static int COMP_get_type(const COMP_METHOD *meth)
-{
-    return meth->type;
-}
-/* LCOV_EXCL_STOP */
-#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 int
-SSL_SESSION_has_ticket(const SSL_SESSION *s)
-{
-    return (s->tlsext_ticklen > 0) ? 1 : 0;
-}
-
-static unsigned long
-SSL_SESSION_get_ticket_lifetime_hint(const SSL_SESSION *s)
-{
-    return s->tlsext_tick_lifetime_hint;
-}
-
-#endif /* OpenSSL < 1.1.0 or LibreSSL < 2.7.0 */
 
 /* Default cipher suites */
 #ifndef PY_SSL_DEFAULT_CIPHERS
@@ -409,24 +270,10 @@ enum py_proto_version {
 #endif
 };
 
-
-/* serves as a flag to see whether we've initialized the SSL thread support. */
-/* 0 means no, greater than 0 means yes */
-
-static unsigned int _ssl_locks_count = 0;
-
 /* SSL socket object */
 
 #define X509_NAME_MAXLEN 256
 
-/* SSL_CTX_clear_options() and SSL_clear_options() were first added in
- * OpenSSL 0.9.8m but do not appear in some 0.9.9-dev versions such the
- * 0.9.9 from "May 2008" that NetBSD 5.0 uses. */
-#if OPENSSL_VERSION_NUMBER >= 0x009080dfL && OPENSSL_VERSION_NUMBER != 0x00909000L
-# define HAVE_SSL_CTX_CLEAR_OPTIONS
-#else
-# undef HAVE_SSL_CTX_CLEAR_OPTIONS
-#endif
 
 /* In case of 'tls-unique' it will be 12 bytes for TLS, 36 bytes for
  * older SSL, but let's be safe */
@@ -436,17 +283,9 @@ static unsigned int _ssl_locks_count = 0
 typedef struct {
     PyObject_HEAD
     SSL_CTX *ctx;
-#if HAVE_NPN
-    unsigned char *npn_protocols;
-    int npn_protocols_len;
-#endif
-#if HAVE_ALPN
     unsigned char *alpn_protocols;
     unsigned int alpn_protocols_len;
-#endif
-#ifndef OPENSSL_NO_TLSEXT
     PyObject *set_sni_cb;
-#endif
     int check_hostname;
     /* OpenSSL has no API to get hostflags from X509_VERIFY_PARAM* struct.
      * We have to maintain our own copy. OpenSSL's hostflags default to 0.
@@ -457,10 +296,8 @@ typedef struct {
     int post_handshake_auth;
 #endif
     PyObject *msg_cb;
-#ifdef HAVE_OPENSSL_KEYLOG
     PyObject *keylog_filename;
     BIO *keylog_bio;
-#endif
 } PySSLContext;
 
 typedef struct {
@@ -667,23 +504,18 @@ fill_and_set_sslerror(PySSLSocket *sslso
         }
 
         switch (verify_code) {
-#ifdef X509_V_ERR_HOSTNAME_MISMATCH
-        /* OpenSSL >= 1.0.2, LibreSSL >= 2.5.3 */
         case X509_V_ERR_HOSTNAME_MISMATCH:
             verify_obj = PyUnicode_FromFormat(
                 "Hostname mismatch, certificate is not valid for '%S'.",
                 sslsock->server_hostname
             );
             break;
-#endif
-#ifdef X509_V_ERR_IP_ADDRESS_MISMATCH
         case X509_V_ERR_IP_ADDRESS_MISMATCH:
             verify_obj = PyUnicode_FromFormat(
                 "IP address mismatch, certificate is not valid for '%S'.",
                 sslsock->server_hostname
             );
             break;
-#endif
         default:
             verify_str = X509_verify_cert_error_string(verify_code);
             if (verify_str != NULL) {
@@ -2014,7 +1846,6 @@ cipher_to_tuple(const SSL_CIPHER *cipher
     return NULL;
 }
 
-#if OPENSSL_VERSION_NUMBER >= 0x10002000UL
 static PyObject *
 cipher_to_dict(const SSL_CIPHER *cipher)
 {
@@ -2023,10 +1854,8 @@ cipher_to_dict(const SSL_CIPHER *cipher)
     unsigned long cipher_id;
     int alg_bits, strength_bits, len;
     char buf[512] = {0};
-#if OPENSSL_VERSION_1_1
     int aead, nid;
     const char *skcipher = NULL, *digest = NULL, *kx = NULL, *auth = NULL;
-#endif
 
     /* can be NULL */
     cipher_name = SSL_CIPHER_get_name(cipher);
@@ -2039,7 +1868,6 @@ cipher_to_dict(const SSL_CIPHER *cipher)
         buf[len-1] = '\0';
     strength_bits = SSL_CIPHER_get_bits(cipher, &alg_bits);
 
-#if OPENSSL_VERSION_1_1
     aead = SSL_CIPHER_is_aead(cipher);
     nid = SSL_CIPHER_get_cipher_nid(cipher);
     skcipher = nid != NID_undef ? OBJ_nid2ln(nid) : NULL;
@@ -2049,13 +1877,10 @@ cipher_to_dict(const SSL_CIPHER *cipher)
     kx = nid != NID_undef ? OBJ_nid2ln(nid) : NULL;
     nid = SSL_CIPHER_get_auth_nid(cipher);
     auth = nid != NID_undef ? OBJ_nid2ln(nid) : NULL;
-#endif
 
     return Py_BuildValue(
         "{sksssssssisi"
-#if OPENSSL_VERSION_1_1
         "sOssssssss"
-#endif
         "}",
         "id", cipher_id,
         "name", cipher_name,
@@ -2063,16 +1888,13 @@ cipher_to_dict(const SSL_CIPHER *cipher)
         "description", buf,
         "strength_bits", strength_bits,
         "alg_bits", alg_bits
-#if OPENSSL_VERSION_1_1
         ,"aead", aead ? Py_True : Py_False,
         "symmetric", skcipher,
         "digest", digest,
         "kea", kx,
         "auth", auth
-#endif
        );
 }
-#endif
 
 /*[clinic input]
 _ssl._SSLSocket.shared_ciphers
@@ -2143,28 +1965,6 @@ _ssl__SSLSocket_version_impl(PySSLSocket
     return PyUnicode_FromString(version);
 }
 
-#if HAVE_NPN
-/*[clinic input]
-_ssl._SSLSocket.selected_npn_protocol
-[clinic start generated code]*/
-
-static PyObject *
-_ssl__SSLSocket_selected_npn_protocol_impl(PySSLSocket *self)
-/*[clinic end generated code: output=b91d494cd207ecf6 input=c28fde139204b826]*/
-{
-    const unsigned char *out;
-    unsigned int outlen;
-
-    SSL_get0_next_proto_negotiated(self->ssl,
-                                   &out, &outlen);
-
-    if (out == NULL)
-        Py_RETURN_NONE;
-    return PyUnicode_FromStringAndSize((char *)out, outlen);
-}
-#endif
-
-#if HAVE_ALPN
 /*[clinic input]
 _ssl._SSLSocket.selected_alpn_protocol
 [clinic start generated code]*/
@@ -2182,7 +1982,6 @@ _ssl__SSLSocket_selected_alpn_protocol_i
         Py_RETURN_NONE;
     return PyUnicode_FromStringAndSize((char *)out, outlen);
 }
-#endif
 
 /*[clinic input]
 _ssl._SSLSocket.compression
@@ -2219,11 +2018,6 @@ static int PySSL_set_context(PySSLSocket
                                    void *closure) {
 
     if (PyObject_TypeCheck(value, &PySSLContext_Type)) {
-#if !HAVE_SNI
-        PyErr_SetString(PyExc_NotImplementedError, "setting a socket's "
-                        "context is not supported by your OpenSSL library");
-        return -1;
-#else
         Py_INCREF(value);
         Py_SETREF(self->ctx, (PySSLContext *)value);
         SSL_set_SSL_CTX(self->ssl, self->ctx->ctx);
@@ -2232,7 +2026,6 @@ static int PySSL_set_context(PySSLSocket
             self->ssl,
             self->ctx->msg_cb ? _PySSL_msg_callback : NULL
         );
-#endif
     } else {
         PyErr_SetString(PyExc_TypeError, "The value must be a SSLContext");
         return -1;
@@ -2857,8 +2650,6 @@ _ssl__SSLSocket_verify_client_post_hands
 #endif
 }
 
-#ifdef OPENSSL_VERSION_1_1
-
 static SSL_SESSION*
 _ssl_session_dup(SSL_SESSION *session) {
     SSL_SESSION *newsession = NULL;
@@ -2899,7 +2690,6 @@ _ssl_session_dup(SSL_SESSION *session) {
     }
     return NULL;
 }
-#endif
 
 static PyObject *
 PySSL_get_session(PySSLSocket *self, void *closure) {
@@ -2908,7 +2698,6 @@ PySSL_get_session(PySSLSocket *self, voi
     PySSLSession *pysess;
     SSL_SESSION *session;
 
-#ifdef OPENSSL_VERSION_1_1
     /* duplicate session as workaround for session bug in OpenSSL 1.1.0,
      * https://github.com/openssl/openssl/issues/1550 */
     session = SSL_get0_session(self->ssl);  /* borrowed reference */
@@ -2918,12 +2707,10 @@ PySSL_get_session(PySSLSocket *self, voi
     if ((session = _ssl_session_dup(session)) == NULL) {
         return NULL;
     }
-#else
     session = SSL_get1_session(self->ssl);
     if (session == NULL) {
         Py_RETURN_NONE;
     }
-#endif
     pysess = PyObject_GC_New(PySSLSession, &PySSLSession_Type);
     if (pysess == NULL) {
         SSL_SESSION_free(session);
@@ -2942,9 +2729,7 @@ static int PySSL_set_session(PySSLSocket
                              void *closure)
                               {
     PySSLSession *pysess;
-#ifdef OPENSSL_VERSION_1_1
     SSL_SESSION *session;
-#endif
     int result;
 
     if (!PySSLSession_Check(value)) {
@@ -2968,7 +2753,6 @@ static int PySSL_set_session(PySSLSocket
                         "Cannot set session after handshake.");
         return -1;
     }
-#ifdef OPENSSL_VERSION_1_1
     /* duplicate session */
     if ((session = _ssl_session_dup(pysess->session)) == NULL) {
         return -1;
@@ -2976,9 +2760,6 @@ static int PySSL_set_session(PySSLSocket
     result = SSL_set_session(self->ssl, session);
     /* free duplicate, SSL_set_session() bumps ref count */
     SSL_SESSION_free(session);
-#else
-    result = SSL_set_session(self->ssl, pysess->session);
-#endif
     if (result == 0) {
         _setSSLError(NULL, 0, __FILE__, __LINE__);
         return -1;
@@ -3029,7 +2810,6 @@ static PyMethodDef PySSLMethods[] = {
     _SSL__SSLSOCKET_CIPHER_METHODDEF
     _SSL__SSLSOCKET_SHARED_CIPHERS_METHODDEF
     _SSL__SSLSOCKET_VERSION_METHODDEF
-    _SSL__SSLSOCKET_SELECTED_NPN_PROTOCOL_METHODDEF
     _SSL__SSLSOCKET_SELECTED_ALPN_PROTOCOL_METHODDEF
     _SSL__SSLSOCKET_COMPRESSION_METHODDEF
     _SSL__SSLSOCKET_SHUTDOWN_METHODDEF
@@ -3123,9 +2903,6 @@ _ssl__SSLContext_impl(PyTypeObject *type
     SSL_CTX *ctx = NULL;
     X509_VERIFY_PARAM *params;
     int result;
-#if defined(SSL_MODE_RELEASE_BUFFERS)
-    unsigned long libver;
-#endif
 
     PySSL_BEGIN_ALLOW_THREADS
     switch(proto_version) {
@@ -3190,19 +2967,10 @@ _ssl__SSLContext_impl(PyTypeObject *type
     self->hostflags = X509_CHECK_FLAG_NO_PARTIAL_WILDCARDS;
     self->protocol = proto_version;
     self->msg_cb = NULL;
-#ifdef HAVE_OPENSSL_KEYLOG
     self->keylog_filename = NULL;
     self->keylog_bio = NULL;
-#endif
-#if HAVE_NPN
-    self->npn_protocols = NULL;
-#endif
-#if HAVE_ALPN
     self->alpn_protocols = NULL;
-#endif
-#ifndef OPENSSL_NO_TLSEXT
     self->set_sni_cb = NULL;
-#endif
     /* Don't check host name by default */
     if (proto_version == PY_SSL_VERSION_TLS_CLIENT) {
         self->check_hostname = 1;
@@ -3264,37 +3032,9 @@ _ssl__SSLContext_impl(PyTypeObject *type
         return NULL;
     }
 
-#if defined(SSL_MODE_RELEASE_BUFFERS)
     /* Set SSL_MODE_RELEASE_BUFFERS. This potentially greatly reduces memory
-       usage for no cost at all. However, don't do this for OpenSSL versions
-       between 1.0.1 and 1.0.1h or 1.0.0 and 1.0.0m, which are affected by CVE
-       2014-0198. I can't find exactly which beta fixed this CVE, so be
-       conservative and assume it wasn't fixed until release. We do this check
-       at runtime to avoid problems from the dynamic linker.
-       See #25672 for more on this. */
-    libver = OpenSSL_version_num();
-    if (!(libver >= 0x10001000UL && libver < 0x1000108fUL) &&
-        !(libver >= 0x10000000UL && libver < 0x100000dfUL)) {
-        SSL_CTX_set_mode(self->ctx, SSL_MODE_RELEASE_BUFFERS);
-    }
-#endif
-
-
-#if !defined(OPENSSL_NO_ECDH) && !defined(OPENSSL_VERSION_1_1)
-    /* 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. OpenSSL 1.1 has it enabled by default.
-     */
-#if defined(SSL_CTX_set_ecdh_auto)
-    SSL_CTX_set_ecdh_auto(self->ctx, 1);
-#else
-    {
-        EC_KEY *key = EC_KEY_new_by_curve_name(NID_X9_62_prime256v1);
-        SSL_CTX_set_tmp_ecdh(self->ctx, key);
-        EC_KEY_free(key);
-    }
-#endif
-#endif
+       usage for no cost at all. */
+    SSL_CTX_set_mode(self->ctx, SSL_MODE_RELEASE_BUFFERS);
 
 #define SID_CTX "Python"
     SSL_CTX_set_session_id_context(self->ctx, (const unsigned char *) SID_CTX,
@@ -3302,11 +3042,9 @@ _ssl__SSLContext_impl(PyTypeObject *type
 #undef SID_CTX
 
     params = SSL_CTX_get0_param(self->ctx);
-#ifdef X509_V_FLAG_TRUSTED_FIRST
     /* Improve trust chain building when cross-signed intermediate
        certificates are present. See https://bugs.python.org/issue23476. */
     X509_VERIFY_PARAM_set_flags(params, X509_V_FLAG_TRUSTED_FIRST);
-#endif
     X509_VERIFY_PARAM_set_hostflags(params, self->hostflags);
 
 #ifdef TLS1_3_VERSION
@@ -3320,9 +3058,7 @@ _ssl__SSLContext_impl(PyTypeObject *type
 static int
 context_traverse(PySSLContext *self, visitproc visit, void *arg)
 {
-#ifndef OPENSSL_NO_TLSEXT
     Py_VISIT(self->set_sni_cb);
-#endif
     Py_VISIT(self->msg_cb);
     return 0;
 }
@@ -3330,11 +3066,8 @@ context_traverse(PySSLContext *self, vis
 static int
 context_clear(PySSLContext *self)
 {
-#ifndef OPENSSL_NO_TLSEXT
     Py_CLEAR(self->set_sni_cb);
-#endif
     Py_CLEAR(self->msg_cb);
-#ifdef HAVE_OPENSSL_KEYLOG
     Py_CLEAR(self->keylog_filename);
     if (self->keylog_bio != NULL) {
         PySSL_BEGIN_ALLOW_THREADS
@@ -3342,7 +3075,6 @@ context_clear(PySSLContext *self)
         PySSL_END_ALLOW_THREADS
         self->keylog_bio = NULL;
     }
-#endif
     return 0;
 }
 
@@ -3353,12 +3085,7 @@ context_dealloc(PySSLContext *self)
     PyObject_GC_UnTrack(self);
     context_clear(self);
     SSL_CTX_free(self->ctx);
-#if HAVE_NPN
-    PyMem_FREE(self->npn_protocols);
-#endif
-#if HAVE_ALPN
     PyMem_FREE(self->alpn_protocols);
-#endif
     Py_TYPE(self)->tp_free(self);
 }
 
@@ -3385,7 +3112,6 @@ _ssl__SSLContext_set_ciphers_impl(PySSLC
     Py_RETURN_NONE;
 }
 
-#if OPENSSL_VERSION_NUMBER >= 0x10002000UL
 /*[clinic input]
 _ssl._SSLContext.get_ciphers
 [clinic start generated code]*/
@@ -3428,10 +3154,8 @@ _ssl__SSLContext_get_ciphers_impl(PySSLC
     return result;
 
 }
-#endif
 
 
-#if HAVE_NPN || HAVE_ALPN
 static int
 do_protocol_selection(int alpn, unsigned char **out, unsigned char *outlen,
                       const unsigned char *server_protocols, unsigned int server_protocols_len,
@@ -3455,77 +3179,7 @@ do_protocol_selection(int alpn, unsigned
 
     return SSL_TLSEXT_ERR_OK;
 }
-#endif
 
-#if HAVE_NPN
-/* this callback gets passed to SSL_CTX_set_next_protos_advertise_cb */
-static int
-_advertiseNPN_cb(SSL *s,
-                 const unsigned char **data, unsigned int *len,
-                 void *args)
-{
-    PySSLContext *ssl_ctx = (PySSLContext *) args;
-
-    if (ssl_ctx->npn_protocols == NULL) {
-        *data = (unsigned char *)"";
-        *len = 0;
-    } else {
-        *data = ssl_ctx->npn_protocols;
-        *len = ssl_ctx->npn_protocols_len;
-    }
-
-    return SSL_TLSEXT_ERR_OK;
-}
-/* this callback gets passed to SSL_CTX_set_next_proto_select_cb */
-static int
-_selectNPN_cb(SSL *s,
-              unsigned char **out, unsigned char *outlen,
-              const unsigned char *server, unsigned int server_len,
-              void *args)
-{
-    PySSLContext *ctx = (PySSLContext *)args;
-    return do_protocol_selection(0, out, outlen, server, server_len,
-                                 ctx->npn_protocols, ctx->npn_protocols_len);
-}
-#endif
-
-/*[clinic input]
-_ssl._SSLContext._set_npn_protocols
-    protos: Py_buffer
-    /
-[clinic start generated code]*/
-
-static PyObject *
-_ssl__SSLContext__set_npn_protocols_impl(PySSLContext *self,
-                                         Py_buffer *protos)
-/*[clinic end generated code: output=72b002c3324390c6 input=319fcb66abf95bd7]*/
-{
-#if HAVE_NPN
-    PyMem_Free(self->npn_protocols);
-    self->npn_protocols = PyMem_Malloc(protos->len);
-    if (self->npn_protocols == NULL)
-        return PyErr_NoMemory();
-    memcpy(self->npn_protocols, protos->buf, protos->len);
-    self->npn_protocols_len = (int) protos->len;
-
-    /* set both server and client callbacks, because the context can
-     * be used to create both types of sockets */
-    SSL_CTX_set_next_protos_advertised_cb(self->ctx,
-                                          _advertiseNPN_cb,
-                                          self);
-    SSL_CTX_set_next_proto_select_cb(self->ctx,
-                                     _selectNPN_cb,
-                                     self);
-
-    Py_RETURN_NONE;
-#else
-    PyErr_SetString(PyExc_NotImplementedError,
-                    "The NPN extension requires OpenSSL 1.0.1 or later.");
-    return NULL;
-#endif
-}
-
-#if HAVE_ALPN
 static int
 _selectALPN_cb(SSL *s,
               const unsigned char **out, unsigned char *outlen,
@@ -3537,7 +3191,6 @@ _selectALPN_cb(SSL *s,
                                  ctx->alpn_protocols, ctx->alpn_protocols_len,
                                  client_protocols, client_protocols_len);
 }
-#endif
 
 /*[clinic input]
 _ssl._SSLContext._set_alpn_protocols
@@ -3550,7 +3203,6 @@ _ssl__SSLContext__set_alpn_protocols_imp
                                           Py_buffer *protos)
 /*[clinic end generated code: output=87599a7f76651a9b input=9bba964595d519be]*/
 {
-#if HAVE_ALPN
     if ((size_t)protos->len > UINT_MAX) {
         PyErr_Format(PyExc_OverflowError,
             "protocols longer than %u bytes", UINT_MAX);
@@ -3569,11 +3221,6 @@ _ssl__SSLContext__set_alpn_protocols_imp
     SSL_CTX_set_alpn_select_cb(self->ctx, _selectALPN_cb, self);
 
     Py_RETURN_NONE;
-#else
-    PyErr_SetString(PyExc_NotImplementedError,
-                    "The ALPN extension requires OpenSSL 1.0.2 or later.");
-    return NULL;
-#endif
 }
 
 static PyObject *
@@ -3649,9 +3296,6 @@ set_verify_flags(PySSLContext *self, PyO
 }
 
 /* Getter and setter for protocol version */
-#if defined(SSL_CTRL_GET_MAX_PROTO_VERSION)
-
-
 static int
 set_min_max_proto_version(PySSLContext *self, PyObject *arg, int what)
 {
@@ -3746,9 +3390,8 @@ set_maximum_version(PySSLContext *self,
 {
     return set_min_max_proto_version(self, arg, 1);
 }
-#endif /* SSL_CTRL_GET_MAX_PROTO_VERSION */
 
-#if (OPENSSL_VERSION_NUMBER >= 0x10101000L) && !defined(LIBRESSL_VERSION_NUMBER)
+#ifdef TLS1_3_VERSION
 static PyObject *
 get_num_tickets(PySSLContext *self, void *c)
 {
@@ -3779,7 +3422,7 @@ set_num_tickets(PySSLContext *self, PyOb
 
 PyDoc_STRVAR(PySSLContext_num_tickets_doc,
 "Control the number of TLSv1.3 session tickets");
-#endif /* OpenSSL 1.1.1 */
+#endif /* TLS1_3_VERSION */
 
 static PyObject *
 get_options(PySSLContext *self, void *c)
@@ -3797,13 +3440,7 @@ set_options(PySSLContext *self, PyObject
     clear = opts & ~new_opts;
     set = ~opts & new_opts;
     if (clear) {
-#ifdef HAVE_SSL_CTX_CLEAR_OPTIONS
         SSL_CTX_clear_options(self->ctx, clear);
-#else
-        PyErr_SetString(PyExc_ValueError,
-                        "can't clear options before OpenSSL 0.9.8m");
-        return -1;
-#endif
     }
     if (set)
         SSL_CTX_set_options(self->ctx, set);
@@ -4500,7 +4137,6 @@ _ssl__SSLContext_set_default_verify_path
     Py_RETURN_NONE;
 }
 
-#ifndef OPENSSL_NO_ECDH
 /*[clinic input]
 _ssl._SSLContext.set_ecdh_curve
     name: object
@@ -4535,9 +4171,7 @@ _ssl__SSLContext_set_ecdh_curve(PySSLCon
     EC_KEY_free(key);
     Py_RETURN_NONE;
 }
-#endif
 
-#if HAVE_SNI && !defined(OPENSSL_NO_TLSEXT)
 static int
 _servername_callback(SSL *s, int *al, void *args)
 {
@@ -4641,7 +4275,6 @@ error:
     PyGILState_Release(gstate);
     return ret;
 }
-#endif
 
 static PyObject *
 get_sni_callback(PySSLContext *self, void *c)
@@ -4662,7 +4295,6 @@ set_sni_callback(PySSLContext *self, PyO
                         "sni_callback cannot be set on TLS_CLIENT context");
         return -1;
     }
-#if HAVE_SNI && !defined(OPENSSL_NO_TLSEXT)
     Py_CLEAR(self->set_sni_cb);
     if (arg == Py_None) {
         SSL_CTX_set_tlsext_servername_callback(self->ctx, NULL);
@@ -4680,13 +4312,6 @@ set_sni_callback(PySSLContext *self, PyO
         SSL_CTX_set_tlsext_servername_arg(self->ctx, self);
     }
     return 0;
-#else
-    PyErr_SetString(PyExc_NotImplementedError,
-                    "The TLS extension servername callback, "
-                    "SSL_CTX_set_tlsext_servername_callback, "
-                    "is not in the current OpenSSL library.");
-    return -1;
-#endif
 }
 
 /* Shim of X509_STORE_get1_objects API from OpenSSL 3.3
@@ -4882,21 +4507,17 @@ static PyGetSetDef context_getsetlist[]
                        (setter) set_check_hostname, NULL},
     {"_host_flags", (getter) get_host_flags,
                     (setter) set_host_flags, NULL},
-#if SSL_CTRL_GET_MAX_PROTO_VERSION
     {"minimum_version", (getter) get_minimum_version,
                         (setter) set_minimum_version, NULL},
     {"maximum_version", (getter) get_maximum_version,
                         (setter) set_maximum_version, NULL},
-#endif
-#ifdef HAVE_OPENSSL_KEYLOG
     {"keylog_filename", (getter) _PySSLContext_get_keylog_filename,
                         (setter) _PySSLContext_set_keylog_filename, NULL},
-#endif
     {"_msg_callback", (getter) _PySSLContext_get_msg_callback,
                       (setter) _PySSLContext_set_msg_callback, NULL},
     {"sni_callback", (getter) get_sni_callback,
                      (setter) set_sni_callback, PySSLContext_sni_callback_doc},
-#if (OPENSSL_VERSION_NUMBER >= 0x10101000L) && !defined(LIBRESSL_VERSION_NUMBER)
+#ifdef TLS1_3_VERSION
     {"num_tickets", (getter) get_num_tickets,
                     (setter) set_num_tickets, PySSLContext_num_tickets_doc},
 #endif
@@ -4923,7 +4544,6 @@ static struct PyMethodDef context_method
     _SSL__SSLCONTEXT__WRAP_BIO_METHODDEF
     _SSL__SSLCONTEXT_SET_CIPHERS_METHODDEF
     _SSL__SSLCONTEXT__SET_ALPN_PROTOCOLS_METHODDEF
-    _SSL__SSLCONTEXT__SET_NPN_PROTOCOLS_METHODDEF
     _SSL__SSLCONTEXT_LOAD_CERT_CHAIN_METHODDEF
     _SSL__SSLCONTEXT_LOAD_DH_PARAMS_METHODDEF
     _SSL__SSLCONTEXT_LOAD_VERIFY_LOCATIONS_METHODDEF
@@ -5441,11 +5061,7 @@ PySSL_RAND(int len, int pseudo)
     if (bytes == NULL)
         return NULL;
     if (pseudo) {
-#ifdef PY_OPENSSL_1_1_API
         ok = RAND_bytes((unsigned char*)PyBytes_AS_STRING(bytes), len);
-#else
-        ok = RAND_pseudo_bytes((unsigned char*)PyBytes_AS_STRING(bytes), len);
-#endif
         if (ok == 0 || ok == 1)
             return Py_BuildValue("NO", bytes, ok == 1 ? Py_True : Py_False);
     }
@@ -6000,92 +5616,6 @@ static PyMethodDef PySSL_methods[] = {
 };
 
 
-#ifdef HAVE_OPENSSL_CRYPTO_LOCK
-
-/* an implementation of OpenSSL threading operations in terms
- * 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;
-
-#if OPENSSL_VERSION_NUMBER >= 0x10000000
-/* use new CRYPTO_THREADID API. */
-static void
-_ssl_threadid_callback(CRYPTO_THREADID *id)
-{
-    CRYPTO_THREADID_set_numeric(id, PyThread_get_thread_ident());
-}
-#else
-/* deprecated CRYPTO_set_id_callback() API. */
-static unsigned long
-_ssl_thread_id_function (void) {
-    return PyThread_get_thread_ident();
-}
-#endif
-
-static void _ssl_thread_locking_function
-    (int mode, int n, const char *file, int line) {
-    /* this function is needed to perform locking on shared data
-       structures. (Note that OpenSSL uses a number of global data
-       structures that will be implicitly shared whenever multiple
-       threads use OpenSSL.) Multi-threaded applications will
-       crash at random if it is not set.
-
-       locking_function() must be able to handle up to
-       CRYPTO_num_locks() different mutex locks. It sets the n-th
-       lock if mode & CRYPTO_LOCK, and releases it otherwise.
-
-       file and line are the file number of the function setting the
-       lock. They can be useful for debugging.
-    */
-
-    if ((_ssl_locks == NULL) ||
-        (n < 0) || ((unsigned)n >= _ssl_locks_count))
-        return;
-
-    if (mode & CRYPTO_LOCK) {
-        PyThread_acquire_lock(_ssl_locks[n], 1);
-    } else {
-        PyThread_release_lock(_ssl_locks[n]);
-    }
-}
-
-static int _setup_ssl_threads(void) {
-
-    unsigned int i;
-
-    if (_ssl_locks == NULL) {
-        _ssl_locks_count = CRYPTO_num_locks();
-        _ssl_locks = PyMem_Calloc(_ssl_locks_count,
-                                  sizeof(PyThread_type_lock));
-        if (_ssl_locks == NULL) {
-            PyErr_NoMemory();
-            return 0;
-        }
-        for (i = 0;  i < _ssl_locks_count;  i++) {
-            _ssl_locks[i] = PyThread_allocate_lock();
-            if (_ssl_locks[i] == NULL) {
-                unsigned int j;
-                for (j = 0;  j < i;  j++) {
-                    PyThread_free_lock(_ssl_locks[j]);
-                }
-                PyMem_Free(_ssl_locks);
-                return 0;
-            }
-        }
-        CRYPTO_set_locking_callback(_ssl_thread_locking_function);
-#if OPENSSL_VERSION_NUMBER >= 0x10000000
-        CRYPTO_THREADID_set_callback(_ssl_threadid_callback);
-#else
-        CRYPTO_set_id_callback(_ssl_thread_id_function);
-#endif
-    }
-    return 1;
-}
-
-#endif  /* HAVE_OPENSSL_CRYPTO_LOCK for OpenSSL < 1.1.0 */
-
 PyDoc_STRVAR(module_doc,
 "Implementation module for SSL socket operations.  See the socket module\n\
 for documentation.");
@@ -6152,14 +5682,6 @@ PyInit__ssl(void)
         return NULL;
     PySocketModule = *socket_api;
 
-#ifndef OPENSSL_VERSION_1_1
-    /* Load all algorithms and initialize cpuid */
-    OPENSSL_add_all_algorithms_noconf();
-    /* Init OpenSSL */
-    SSL_load_error_strings();
-    SSL_library_init();
-#endif
-
 #ifdef HAVE_OPENSSL_CRYPTO_LOCK
     /* note that this will start threading if not already started */
     if (!_setup_ssl_threads()) {
@@ -6266,10 +5788,8 @@ PyInit__ssl(void)
                             X509_V_FLAG_CRL_CHECK|X509_V_FLAG_CRL_CHECK_ALL);
     PyModule_AddIntConstant(m, "VERIFY_X509_STRICT",
                             X509_V_FLAG_X509_STRICT);
-#ifdef X509_V_FLAG_TRUSTED_FIRST
     PyModule_AddIntConstant(m, "VERIFY_X509_TRUSTED_FIRST",
                             X509_V_FLAG_TRUSTED_FIRST);
-#endif
 
     /* Alert Descriptions from ssl.h */
     /* note RESERVED constants no longer intended for use have been removed */
@@ -6426,31 +5946,11 @@ PyInit__ssl(void)
         PyModule_AddObject((m), (key), bool_obj); \
     } while (0)
 
-#if HAVE_SNI
     addbool(m, "HAS_SNI", 1);
-#else
-    addbool(m, "HAS_SNI", 0);
-#endif
-
     addbool(m, "HAS_TLS_UNIQUE", 1);
-
-#ifndef OPENSSL_NO_ECDH
     addbool(m, "HAS_ECDH", 1);
-#else
-    addbool(m, "HAS_ECDH", 0);
-#endif
-
-#if HAVE_NPN
-    addbool(m, "HAS_NPN", 1);
-#else
     addbool(m, "HAS_NPN", 0);
-#endif
-
-#if HAVE_ALPN
     addbool(m, "HAS_ALPN", 1);
-#else
-    addbool(m, "HAS_ALPN", 0);
-#endif
 
 #if defined(SSL2_VERSION) && !defined(OPENSSL_NO_SSL2)
     addbool(m, "HAS_SSLv2", 1);
--- a/Modules/_ssl/debughelpers.c
+++ b/Modules/_ssl/debughelpers.c
@@ -114,8 +114,6 @@ _PySSLContext_set_msg_callback(PySSLCont
     return 0;
 }
 
-#ifdef HAVE_OPENSSL_KEYLOG
-
 static void
 _PySSL_keylog_callback(const SSL *ssl, const char *line)
 {
@@ -219,5 +217,3 @@ _PySSLContext_set_keylog_filename(PySSLC
     SSL_CTX_set_keylog_callback(self->ctx, _PySSL_keylog_callback);
     return 0;
 }
-
-#endif
--- a/Modules/clinic/_hashopenssl.c.h
+++ b/Modules/clinic/_hashopenssl.c.h
@@ -965,7 +965,7 @@ exit:
     return return_value;
 }
 
-#if (OPENSSL_VERSION_NUMBER > 0x10100000L && !defined(OPENSSL_NO_SCRYPT) && !defined(LIBRESSL_VERSION_NUMBER))
+#if defined(PY_OPENSSL_HAS_SCRYPT)
 
 PyDoc_STRVAR(_hashlib_scrypt__doc__,
 "scrypt($module, /, password, *, salt=None, n=None, r=None, p=None,\n"
@@ -1093,7 +1093,7 @@ exit:
     return return_value;
 }
 
-#endif /* (OPENSSL_VERSION_NUMBER > 0x10100000L && !defined(OPENSSL_NO_SCRYPT) && !defined(LIBRESSL_VERSION_NUMBER)) */
+#endif /* defined(PY_OPENSSL_HAS_SCRYPT) */
 
 PyDoc_STRVAR(_hashlib_hmac_singleshot__doc__,
 "hmac_digest($module, /, key, msg, digest)\n"
@@ -1324,8 +1324,6 @@ _hashlib_HMAC_hexdigest(HMACobject *self
     return _hashlib_HMAC_hexdigest_impl(self);
 }
 
-#if !defined(LIBRESSL_VERSION_NUMBER)
-
 PyDoc_STRVAR(_hashlib_get_fips_mode__doc__,
 "get_fips_mode($module, /)\n"
 "--\n"
@@ -1361,8 +1359,6 @@ exit:
     return return_value;
 }
 
-#endif /* !defined(LIBRESSL_VERSION_NUMBER) */
-
 PyDoc_STRVAR(_hashlib_compare_digest__doc__,
 "compare_digest($module, a, b, /)\n"
 "--\n"
@@ -1439,7 +1435,4 @@ exit:
     #define _HASHLIB_SCRYPT_METHODDEF
 #endif /* !defined(_HASHLIB_SCRYPT_METHODDEF) */
 
-#ifndef _HASHLIB_GET_FIPS_MODE_METHODDEF
-    #define _HASHLIB_GET_FIPS_MODE_METHODDEF
-#endif /* !defined(_HASHLIB_GET_FIPS_MODE_METHODDEF) */
 /*[clinic end generated code: output=b6b280e46bf0b139 input=a9049054013a1b77]*/
--- a/Modules/clinic/_ssl.c.h
+++ b/Modules/clinic/_ssl.c.h
@@ -139,29 +139,6 @@ _ssl__SSLSocket_version(PySSLSocket *sel
     return _ssl__SSLSocket_version_impl(self);
 }
 
-#if (HAVE_NPN)
-
-PyDoc_STRVAR(_ssl__SSLSocket_selected_npn_protocol__doc__,
-"selected_npn_protocol($self, /)\n"
-"--\n"
-"\n");
-
-#define _SSL__SSLSOCKET_SELECTED_NPN_PROTOCOL_METHODDEF    \
-    {"selected_npn_protocol", (PyCFunction)_ssl__SSLSocket_selected_npn_protocol, METH_NOARGS, _ssl__SSLSocket_selected_npn_protocol__doc__},
-
-static PyObject *
-_ssl__SSLSocket_selected_npn_protocol_impl(PySSLSocket *self);
-
-static PyObject *
-_ssl__SSLSocket_selected_npn_protocol(PySSLSocket *self, PyObject *Py_UNUSED(ignored))
-{
-    return _ssl__SSLSocket_selected_npn_protocol_impl(self);
-}
-
-#endif /* (HAVE_NPN) */
-
-#if (HAVE_ALPN)
-
 PyDoc_STRVAR(_ssl__SSLSocket_selected_alpn_protocol__doc__,
 "selected_alpn_protocol($self, /)\n"
 "--\n"
@@ -179,8 +156,6 @@ _ssl__SSLSocket_selected_alpn_protocol(P
     return _ssl__SSLSocket_selected_alpn_protocol_impl(self);
 }
 
-#endif /* (HAVE_ALPN) */
-
 PyDoc_STRVAR(_ssl__SSLSocket_compression__doc__,
 "compression($self, /)\n"
 "--\n"
@@ -457,8 +432,6 @@ exit:
     return return_value;
 }
 
-#if (OPENSSL_VERSION_NUMBER >= 0x10002000UL)
-
 PyDoc_STRVAR(_ssl__SSLContext_get_ciphers__doc__,
 "get_ciphers($self, /)\n"
 "--\n"
@@ -476,44 +449,6 @@ _ssl__SSLContext_get_ciphers(PySSLContex
     return _ssl__SSLContext_get_ciphers_impl(self);
 }
 
-#endif /* (OPENSSL_VERSION_NUMBER >= 0x10002000UL) */
-
-PyDoc_STRVAR(_ssl__SSLContext__set_npn_protocols__doc__,
-"_set_npn_protocols($self, protos, /)\n"
-"--\n"
-"\n");
-
-#define _SSL__SSLCONTEXT__SET_NPN_PROTOCOLS_METHODDEF    \
-    {"_set_npn_protocols", (PyCFunction)_ssl__SSLContext__set_npn_protocols, METH_O, _ssl__SSLContext__set_npn_protocols__doc__},
-
-static PyObject *
-_ssl__SSLContext__set_npn_protocols_impl(PySSLContext *self,
-                                         Py_buffer *protos);
-
-static PyObject *
-_ssl__SSLContext__set_npn_protocols(PySSLContext *self, PyObject *arg)
-{
-    PyObject *return_value = NULL;
-    Py_buffer protos = {NULL, NULL};
-
-    if (PyObject_GetBuffer(arg, &protos, PyBUF_SIMPLE) != 0) {
-        goto exit;
-    }
-    if (!PyBuffer_IsContiguous(&protos, 'C')) {
-        _PyArg_BadArgument("_set_npn_protocols", "argument", "contiguous buffer", arg);
-        goto exit;
-    }
-    return_value = _ssl__SSLContext__set_npn_protocols_impl(self, &protos);
-
-exit:
-    /* Cleanup for protos */
-    if (protos.obj) {
-       PyBuffer_Release(&protos);
-    }
-
-    return return_value;
-}
-
 PyDoc_STRVAR(_ssl__SSLContext__set_alpn_protocols__doc__,
 "_set_alpn_protocols($self, protos, /)\n"
 "--\n"
@@ -844,8 +779,6 @@ _ssl__SSLContext_set_default_verify_path
     return _ssl__SSLContext_set_default_verify_paths_impl(self);
 }
 
-#if !defined(OPENSSL_NO_ECDH)
-
 PyDoc_STRVAR(_ssl__SSLContext_set_ecdh_curve__doc__,
 "set_ecdh_curve($self, name, /)\n"
 "--\n"
@@ -854,8 +787,6 @@ PyDoc_STRVAR(_ssl__SSLContext_set_ecdh_c
 #define _SSL__SSLCONTEXT_SET_ECDH_CURVE_METHODDEF    \
     {"set_ecdh_curve", (PyCFunction)_ssl__SSLContext_set_ecdh_curve, METH_O, _ssl__SSLContext_set_ecdh_curve__doc__},
 
-#endif /* !defined(OPENSSL_NO_ECDH) */
-
 PyDoc_STRVAR(_ssl__SSLContext_cert_store_stats__doc__,
 "cert_store_stats($self, /)\n"
 "--\n"
@@ -1455,22 +1386,6 @@ exit:
 
 #endif /* defined(_MSC_VER) */
 
-#ifndef _SSL__SSLSOCKET_SELECTED_NPN_PROTOCOL_METHODDEF
-    #define _SSL__SSLSOCKET_SELECTED_NPN_PROTOCOL_METHODDEF
-#endif /* !defined(_SSL__SSLSOCKET_SELECTED_NPN_PROTOCOL_METHODDEF) */
-
-#ifndef _SSL__SSLSOCKET_SELECTED_ALPN_PROTOCOL_METHODDEF
-    #define _SSL__SSLSOCKET_SELECTED_ALPN_PROTOCOL_METHODDEF
-#endif /* !defined(_SSL__SSLSOCKET_SELECTED_ALPN_PROTOCOL_METHODDEF) */
-
-#ifndef _SSL__SSLCONTEXT_GET_CIPHERS_METHODDEF
-    #define _SSL__SSLCONTEXT_GET_CIPHERS_METHODDEF
-#endif /* !defined(_SSL__SSLCONTEXT_GET_CIPHERS_METHODDEF) */
-
-#ifndef _SSL__SSLCONTEXT_SET_ECDH_CURVE_METHODDEF
-    #define _SSL__SSLCONTEXT_SET_ECDH_CURVE_METHODDEF
-#endif /* !defined(_SSL__SSLCONTEXT_SET_ECDH_CURVE_METHODDEF) */
-
 #ifndef _SSL_RAND_EGD_METHODDEF
     #define _SSL_RAND_EGD_METHODDEF
 #endif /* !defined(_SSL_RAND_EGD_METHODDEF) */
--- a/Tools/ssl/multissltests.py
+++ b/Tools/ssl/multissltests.py
@@ -43,8 +43,6 @@ import tarfile
 log = logging.getLogger("multissl")
 
 OPENSSL_OLD_VERSIONS = [
-    "1.0.2u",
-    "1.1.0l",
 ]
 
 OPENSSL_RECENT_VERSIONS = [
@@ -53,11 +51,9 @@ OPENSSL_RECENT_VERSIONS = [
 ]
 
 LIBRESSL_OLD_VERSIONS = [
-    "2.9.2",
 ]
 
 LIBRESSL_RECENT_VERSIONS = [
-    "3.1.0",
 ]
 
 # store files in ../multissl
--- a/configure
+++ b/configure
@@ -88,6 +88,13 @@ fi
 # splitting by setting IFS to empty value.)
 IFS=" ""	$as_nl"
 
+# IFS
+# We need space, tab and new line, in precisely that order.  Quoting is
+# there to prevent editors from complaining about space-tab.
+# (If _AS_PATH_WALK were called with IFS unset, it would disable word
+# splitting by setting IFS to empty value.)
+IFS=" ""	$as_nl"
+
 # Find who we are.  Look in the path if we contain no directory separator.
 as_myself=
 case $0 in #((
@@ -17997,7 +18004,6 @@ as_fn_error ()
   as_fn_exit $as_status
 } # as_fn_error
 
-
 # as_fn_set_status STATUS
 # -----------------------
 # Set $? to STATUS, without forking.
@@ -19043,4 +19049,3 @@ if test "$Py_OPT" = 'false' -a "$Py_DEBU
     echo "" >&6
     echo "" >&6
 fi
-
--- a/configure.ac
+++ b/configure.ac
@@ -5756,42 +5756,6 @@ ac_includes_default="$save_includes_defa
 # Check for usable OpenSSL
 AX_CHECK_OPENSSL([have_openssl=yes],[have_openssl=no])
 
-if test "$have_openssl" = yes; then
-    AC_MSG_CHECKING([for X509_VERIFY_PARAM_set1_host in libssl])
-
-    save_LIBS="$LIBS"
-    save_LDFLAGS="$LDFLAGS"
-    save_CPPFLAGS="$CPPFLAGS"
-    LDFLAGS="$LDFLAGS $OPENSSL_LDFLAGS"
-    LIBS="$OPENSSL_LIBS $LIBS"
-    CPPFLAGS="$OPENSSL_INCLUDES $CPPFLAGS"
-
-    AC_LINK_IFELSE([AC_LANG_PROGRAM([
-        [#include <openssl/x509_vfy.h>]
-    ], [
-        [X509_VERIFY_PARAM *p = X509_VERIFY_PARAM_new();]
-        [X509_VERIFY_PARAM_set1_host(p, "localhost", 0);]
-        [X509_VERIFY_PARAM_set1_ip_asc(p, "127.0.0.1");]
-        [X509_VERIFY_PARAM_set_hostflags(p, 0);]
-    ])
-    ],
-    [
-        ac_cv_has_x509_verify_param_set1_host=yes
-    ],
-    [
-        ac_cv_has_x509_verify_param_set1_host=no
-    ])
-    AC_MSG_RESULT($ac_cv_has_x509_verify_param_set1_host)
-    if test "$ac_cv_has_x509_verify_param_set1_host" = "yes"; then
-        AC_DEFINE(HAVE_X509_VERIFY_PARAM_SET1_HOST, 1,
-        [Define if libssl has X509_VERIFY_PARAM_set1_host and related function])
-    fi
-
-    CPPFLAGS="$save_CPPFLAGS"
-    LDFLAGS="$save_LDFLAGS"
-    LIBS="$save_LIBS"
-fi
-
 # ssl module default cipher suite string
 AH_TEMPLATE(PY_SSL_DEFAULT_CIPHERS,
   [Default cipher suites list for ssl module.
--- a/pyconfig.h.in
+++ b/pyconfig.h.in
@@ -1351,9 +1351,6 @@
 /* Define to 1 if you have the `writev' function. */
 #undef HAVE_WRITEV
 
-/* Define if libssl has X509_VERIFY_PARAM_set1_host and related function */
-#undef HAVE_X509_VERIFY_PARAM_SET1_HOST
-
 /* Define if the zlib library has inflateCopy */
 #undef HAVE_ZLIB_COPY
 
--- a/setup.py
+++ b/setup.py
@@ -539,10 +539,7 @@ class PyBuildExt(build_ext):
                for l in (self.missing, self.failed, self.failed_on_import)):
             print()
             print("Could not build the ssl module!")
-            print("Python requires an OpenSSL 1.0.2 or 1.1 compatible "
-                  "libssl with X509_VERIFY_PARAM_set1_host().")
-            print("LibreSSL 2.6.4 and earlier do not provide the necessary "
-                  "APIs, https://github.com/libressl-portable/portable/issues/381")
+            print("Python requires a OpenSSL 1.1.1 or newer")
             print()
 
         if os.environ.get("PYTHONSTRICTEXTENSIONBUILD") and (self.failed or self.failed_on_import):
@@ -2346,13 +2343,13 @@ class PyBuildExt(build_ext):
             self.missing.extend(['_ssl', '_hashlib'])
             return None, None
 
-        # OpenSSL 1.0.2 uses Kerberos for KRB5 ciphers
-        krb5_h = find_file(
-            'krb5.h', self.inc_dirs,
-            ['/usr/kerberos/include']
+        self.add(Extension(
+            '_ssl', ['_ssl.c'],
+            include_dirs=openssl_includes,
+            library_dirs=openssl_libdirs,
+            libraries=openssl_libs,
+            depends=['socketmodule.h', '_ssl/debughelpers.c'])
         )
-        if krb5_h:
-            ssl_incs.extend(krb5_h)
 
         if config_vars.get("HAVE_X509_VERIFY_PARAM_SET1_HOST"):
             self.add(Extension(
@@ -2367,8 +2364,6 @@ class PyBuildExt(build_ext):
                     '_ssl_data_111.h',
                     '_ssl_data_300.h',
                 ]))
-        else:
-            self.missing.append('_ssl')
 
         self.add(Extension('_hashlib', ['_hashopenssl.c'],
                            depends=['hashlib.h'],

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File CVE-2024-5642-OpenSSL-API-buf-overread-NPN.patch of Package python39 (Revision 7af144b34211cf76367bc17d996393de)

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