diff --git a/Lib/ssl.py b/Lib/ssl.py

index 1f3a31a..b54a684 100644

--- a/Lib/ssl.py

+++ b/Lib/ssl.py

@@ -116,6 +116,7 @@ except ImportError:

 from _ssl import HAS_SNI, HAS_ECDH, HAS_NPN, HAS_ALPN, HAS_TLSv1_3

+from _ssl import _DEFAULT_CIPHERS

 from _ssl import _OPENSSL_API_VERSION

@@ -174,48 +175,7 @@ else:

     CHANNEL_BINDING_TYPES = []

-# Disable weak or insecure ciphers by default

-# (OpenSSL's default setting is 'DEFAULT:!aNULL:!eNULL')

-# Enable a better set of ciphers by default

-# This list has been explicitly chosen to:

-#   * TLS 1.3 ChaCha20 and AES-GCM cipher suites

-#   * Prefer cipher suites that offer perfect forward secrecy (DHE/ECDHE)

-#   * Prefer ECDHE over DHE for better performance

-#   * Prefer AEAD over CBC for better performance and security

-#   * Prefer AES-GCM over ChaCha20 because most platforms have AES-NI

-#     (ChaCha20 needs OpenSSL 1.1.0 or patched 1.0.2)

-#   * Prefer any AES-GCM and ChaCha20 over any AES-CBC for better

-#     performance and security

-#   * Then Use HIGH cipher suites as a fallback

-#   * Disable NULL authentication, NULL encryption, 3DES and MD5 MACs

-#     for security reasons

-_DEFAULT_CIPHERS = (

-    'TLS13-AES-256-GCM-SHA384:TLS13-CHACHA20-POLY1305-SHA256:'

-    'TLS13-AES-128-GCM-SHA256:'

-    'ECDH+AESGCM:ECDH+CHACHA20:DH+AESGCM:DH+CHACHA20:ECDH+AES256:DH+AES256:'

-    'ECDH+AES128:DH+AES:ECDH+HIGH:DH+HIGH:RSA+AESGCM:RSA+AES:RSA+HIGH:'

-    '!aNULL:!eNULL:!MD5:!3DES'

-    )

-

-# Restricted and more secure ciphers for the server side

-# This list has been explicitly chosen to:

-#   * TLS 1.3 ChaCha20 and AES-GCM cipher suites

-#   * Prefer cipher suites that offer perfect forward secrecy (DHE/ECDHE)

-#   * Prefer ECDHE over DHE for better performance

-#   * Prefer AEAD over CBC for better performance and security

-#   * Prefer AES-GCM over ChaCha20 because most platforms have AES-NI

-#   * Prefer any AES-GCM and ChaCha20 over any AES-CBC for better

-#     performance and security

-#   * Then Use HIGH cipher suites as a fallback

-#   * Disable NULL authentication, NULL encryption, MD5 MACs, DSS, RC4, and

-#     3DES for security reasons

-_RESTRICTED_SERVER_CIPHERS = (

-    'TLS13-AES-256-GCM-SHA384:TLS13-CHACHA20-POLY1305-SHA256:'

-    'TLS13-AES-128-GCM-SHA256:'

-    'ECDH+AESGCM:ECDH+CHACHA20:DH+AESGCM:DH+CHACHA20:ECDH+AES256:DH+AES256:'

-    'ECDH+AES128:DH+AES:ECDH+HIGH:DH+HIGH:RSA+AESGCM:RSA+AES:RSA+HIGH:'

-    '!aNULL:!eNULL:!MD5:!DSS:!RC4:!3DES'

-)

+_RESTRICTED_SERVER_CIPHERS = _DEFAULT_CIPHERS

 class CertificateError(ValueError):

@@ -389,8 +349,6 @@ class SSLContext(_SSLContext):

     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=PROTOCOL_TLS):

@@ -505,8 +463,6 @@ def create_default_context(purpose=Purpose.SERVER_AUTH, *, cafile=None,

         # verify certs and host name in client mode

         context.verify_mode = CERT_REQUIRED

         context.check_hostname = True

-    elif purpose == Purpose.CLIENT_AUTH:

-        context.set_ciphers(_RESTRICTED_SERVER_CIPHERS)

     if cafile or capath or cadata:

         context.load_verify_locations(cafile, capath, cadata)

diff --git a/Lib/test/test_ssl.py b/Lib/test/test_ssl.py

index 54644e1..799100c 100644

--- a/Lib/test/test_ssl.py

+++ b/Lib/test/test_ssl.py

@@ -18,6 +18,7 @@ import asyncore

 import weakref

 import platform

 import functools

+import sysconfig

 try:

     import ctypes

 except ImportError:

@@ -36,7 +37,7 @@ 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)

-

+PY_SSL_DEFAULT_CIPHERS = sysconfig.get_config_var('PY_SSL_DEFAULT_CIPHERS')

 def data_file(*name):

     return os.path.join(os.path.dirname(__file__), *name)

@@ -889,6 +890,19 @@ class ContextTests(unittest.TestCase):

         with self.assertRaisesRegex(ssl.SSLError, "No cipher can be selected"):

             ctx.set_ciphers("^$:,;?*'dorothyx")

+    @unittest.skipUnless(PY_SSL_DEFAULT_CIPHERS == 1,

+                         "Test applies only to Python default ciphers")

+    def test_python_ciphers(self):

+        ctx = ssl.SSLContext(ssl.PROTOCOL_TLS_CLIENT)

+        ciphers = ctx.get_ciphers()

+        for suite in ciphers:

+            name = suite['name']

+            self.assertNotIn("PSK", name)

+            self.assertNotIn("SRP", name)

+            self.assertNotIn("MD5", name)

+            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_TLSv1)

diff --git a/Modules/_ssl.c b/Modules/_ssl.c

index df8c6a7..e23a569 100644

--- a/Modules/_ssl.c

+++ b/Modules/_ssl.c

@@ -206,6 +206,31 @@ SSL_SESSION_get_ticket_lifetime_hint(const SSL_SESSION *s)

 #endif /* OpenSSL < 1.1.0 or LibreSSL */

+/* Default cipher suites */

+#ifndef PY_SSL_DEFAULT_CIPHERS

+#define PY_SSL_DEFAULT_CIPHERS 1

+#endif

+

+#if PY_SSL_DEFAULT_CIPHERS == 0

+  #ifndef PY_SSL_DEFAULT_CIPHER_STRING

+     #error "Py_SSL_DEFAULT_CIPHERS 0 needs Py_SSL_DEFAULT_CIPHER_STRING"

+  #endif

+#elif PY_SSL_DEFAULT_CIPHERS == 1

+/* Python custom selection of sensible ciper suites

+ * DEFAULT: OpenSSL's default cipher list. Since 1.0.2 the list is in sensible order.

+ * !aNULL:!eNULL: really no NULL ciphers

+ * !MD5:!3DES:!DES:!RC4:!IDEA:!SEED: no weak or broken algorithms on old OpenSSL versions.

+ * !aDSS: no authentication with discrete logarithm DSA algorithm

+ * !SRP:!PSK: no secure remote password or pre-shared key authentication

+ */

+  #define PY_SSL_DEFAULT_CIPHER_STRING "DEFAULT:!aNULL:!eNULL:!MD5:!3DES:!DES:!RC4:!IDEA:!SEED:!aDSS:!SRP:!PSK"

+#elif PY_SSL_DEFAULT_CIPHERS == 2

+/* Ignored in SSLContext constructor, only used to as _ssl.DEFAULT_CIPHER_STRING */

+  #define PY_SSL_DEFAULT_CIPHER_STRING SSL_DEFAULT_CIPHER_LIST

+#else

+  #error "Unsupported PY_SSL_DEFAULT_CIPHERS"

+#endif

+

 enum py_ssl_error {

     /* these mirror ssl.h */

@@ -2739,7 +2764,12 @@ _ssl__SSLContext_impl(PyTypeObject *type, int proto_version)

     /* A bare minimum cipher list without completely broken cipher suites.

      * It's far from perfect but gives users a better head start. */

     if (proto_version != PY_SSL_VERSION_SSL2) {

-        result = SSL_CTX_set_cipher_list(ctx, "HIGH:!aNULL:!eNULL:!MD5");

+#if PY_SSL_DEFAULT_CIPHERS == 2

+        /* stick to OpenSSL's default settings */

+        result = 1;

+#else

+        result = SSL_CTX_set_cipher_list(ctx, PY_SSL_DEFAULT_CIPHER_STRING);

+#endif

     } else {

         /* SSLv2 needs MD5 */

         result = SSL_CTX_set_cipher_list(ctx, "HIGH:!aNULL:!eNULL");

@@ -5279,6 +5309,9 @@ PyInit__ssl(void)

                              (PyObject *)&PySSLSession_Type) != 0)

         return NULL;

+    PyModule_AddStringConstant(m, "_DEFAULT_CIPHERS",

+                               PY_SSL_DEFAULT_CIPHER_STRING);

+

     PyModule_AddIntConstant(m, "SSL_ERROR_ZERO_RETURN",

                             PY_SSL_ERROR_ZERO_RETURN);

     PyModule_AddIntConstant(m, "SSL_ERROR_WANT_READ",

diff --git a/configure.ac b/configure.ac

index 7ea62f8..4b42393 100644

--- a/configure.ac

+++ b/configure.ac

@@ -5555,6 +5555,42 @@ if test "$have_getrandom" = yes; then

               [Define to 1 if the getrandom() function is available])

 fi

+# ssl module default cipher suite string

+AH_TEMPLATE(PY_SSL_DEFAULT_CIPHERS,

+  [Default cipher suites list for ssl module.

+   1: Python's preferred selection, 2: leave OpenSSL defaults untouched, 0: custom string])

+AH_TEMPLATE(PY_SSL_DEFAULT_CIPHER_STRING,

+  [Cipher suite string for PY_SSL_DEFAULT_CIPHERS=0]

+)

+AC_MSG_CHECKING(for --with-ssl-default-suites)

+AC_ARG_WITH(ssl-default-suites,

+            AS_HELP_STRING([--with-ssl-default-suites=@<:@python|openssl|STRING@:>@],

+                           [Override default cipher suites string,

+                            python: use Python's preferred selection (default),

+                            openssl: leave OpenSSL's defaults untouched,

+                            STRING: use a custom string,

+                            PROTOCOL_SSLv2 ignores the setting]),

+[

+AC_MSG_RESULT($withval)

+case "$withval" in

+    python)

+        AC_DEFINE(PY_SSL_DEFAULT_CIPHERS, 1)

+        ;;

+    openssl)

+        AC_DEFINE(PY_SSL_DEFAULT_CIPHERS, 2)

+        ;;

+    *)

+        AC_DEFINE(PY_SSL_DEFAULT_CIPHERS, 0)

+        AC_DEFINE_UNQUOTED(PY_SSL_DEFAULT_CIPHER_STRING, "$withval")

+        ;;

+esac

+],

+[

+AC_MSG_RESULT(python)

+AC_DEFINE(PY_SSL_DEFAULT_CIPHERS, 1)

+])

+

+

 # generate output files

 AC_CONFIG_FILES(Makefile.pre Modules/Setup.config Misc/python.pc Misc/python-config.sh)

 AC_CONFIG_FILES([Modules/ld_so_aix], [chmod +x Modules/ld_so_aix])