[3.7] gh-94208: Add more TLS version/protocol checks for FreeBSD (GH-94347) (GH-95314)

Three test cases were failing on FreeBSD with latest OpenSSL.
(cherry picked from commit 1bc86c2)

Co-authored-by: Christian Heimes <christian@python.org>

Author: ambv

Lib/test/test_ssl.py

@@ -1131,8 +1131,12 @@ class ContextTests(unittest.TestCase):
     @skip_if_broken_ubuntu_ssl
     def test_constructor(self):
         for protocol in PROTOCOLS:
-            ssl.SSLContext(protocol)
-        ctx = ssl.SSLContext()
+            if has_tls_protocol(protocol):
+                with support.check_warnings():
+                    ctx = ssl.SSLContext(protocol)
+                self.assertEqual(ctx.protocol, protocol)
+        with support.check_warnings():
+            ctx = ssl.SSLContext()
         self.assertEqual(ctx.protocol, ssl.PROTOCOL_TLS)
         self.assertRaises(ValueError, ssl.SSLContext, -1)
         self.assertRaises(ValueError, ssl.SSLContext, 42)
@@ -1284,7 +1288,7 @@ def test_min_max_version(self):
         ctx.maximum_version = ssl.TLSVersion.MINIMUM_SUPPORTED
         self.assertIn(
             ctx.maximum_version,
-            {ssl.TLSVersion.TLSv1, ssl.TLSVersion.SSLv3}
+            {ssl.TLSVersion.TLSv1, ssl.TLSVersion.TLSv1_1, ssl.TLSVersion.SSLv3}
         )
 
         ctx.minimum_version = ssl.TLSVersion.MAXIMUM_SUPPORTED
@@ -1296,19 +1300,19 @@ def test_min_max_version(self):
         with self.assertRaises(ValueError):
             ctx.minimum_version = 42
 
-        ctx = ssl.SSLContext(ssl.PROTOCOL_TLSv1_1)
-
-        self.assertIn(
-            ctx.minimum_version, minimum_range
-        )
-        self.assertEqual(
-            ctx.maximum_version, ssl.TLSVersion.MAXIMUM_SUPPORTED
-        )
-        with self.assertRaises(ValueError):
-            ctx.minimum_version = ssl.TLSVersion.MINIMUM_SUPPORTED
-        with self.assertRaises(ValueError):
-            ctx.maximum_version = ssl.TLSVersion.TLSv1
+        if has_tls_protocol(ssl.PROTOCOL_TLSv1_1):
+            ctx = ssl.SSLContext(ssl.PROTOCOL_TLSv1_1)
 
+            self.assertIn(
+                ctx.minimum_version, minimum_range
+            )
+            self.assertEqual(
+                ctx.maximum_version, ssl.TLSVersion.MAXIMUM_SUPPORTED
+            )
+            with self.assertRaises(ValueError):
+                ctx.minimum_version = ssl.TLSVersion.MINIMUM_SUPPORTED
+            with self.assertRaises(ValueError):
+                ctx.maximum_version = ssl.TLSVersion.TLSv1
 
     @unittest.skipUnless(have_verify_flags(),
                          "verify_flags need OpenSSL > 0.9.8")
@@ -1690,10 +1694,12 @@ def test__create_stdlib_context(self):
         self.assertFalse(ctx.check_hostname)
         self._assert_context_options(ctx)
 
-        ctx = ssl._create_stdlib_context(ssl.PROTOCOL_TLSv1)
-        self.assertEqual(ctx.protocol, ssl.PROTOCOL_TLSv1)
-        self.assertEqual(ctx.verify_mode, ssl.CERT_NONE)
-        self._assert_context_options(ctx)
+        if has_tls_protocol(ssl.PROTOCOL_TLSv1):
+            with support.check_warnings():
+                ctx = ssl._create_stdlib_context(ssl.PROTOCOL_TLSv1)
+            self.assertEqual(ctx.protocol, ssl.PROTOCOL_TLSv1)
+            self.assertEqual(ctx.verify_mode, ssl.CERT_NONE)
+            self._assert_context_options(ctx)
 
         ctx = ssl._create_stdlib_context(ssl.PROTOCOL_TLSv1,
                                          cert_reqs=ssl.CERT_REQUIRED,
@@ -3363,10 +3369,12 @@ def test_protocol_tlsv1_2(self):
                            client_options=ssl.OP_NO_TLSv1_2)
 
         try_protocol_combo(ssl.PROTOCOL_TLS, ssl.PROTOCOL_TLSv1_2, 'TLSv1.2')
-        try_protocol_combo(ssl.PROTOCOL_TLSv1_2, ssl.PROTOCOL_TLSv1, False)
-        try_protocol_combo(ssl.PROTOCOL_TLSv1, ssl.PROTOCOL_TLSv1_2, False)
-        try_protocol_combo(ssl.PROTOCOL_TLSv1_2, ssl.PROTOCOL_TLSv1_1, False)
-        try_protocol_combo(ssl.PROTOCOL_TLSv1_1, ssl.PROTOCOL_TLSv1_2, False)
+        if has_tls_protocol(ssl.PROTOCOL_TLSv1):
+            try_protocol_combo(ssl.PROTOCOL_TLSv1_2, ssl.PROTOCOL_TLSv1, False)
+            try_protocol_combo(ssl.PROTOCOL_TLSv1, ssl.PROTOCOL_TLSv1_2, False)
+        if has_tls_protocol(ssl.PROTOCOL_TLSv1_1):
+            try_protocol_combo(ssl.PROTOCOL_TLSv1_2, ssl.PROTOCOL_TLSv1_1, False)
+            try_protocol_combo(ssl.PROTOCOL_TLSv1_1, ssl.PROTOCOL_TLSv1_2, False)
 
     def test_starttls(self):
         """Switching from clear text to encrypted and back again."""

Misc/NEWS.d/next/Tests/2022-06-27-21-27-20.gh-issue-94208.VR6HX-.rst

@@ -0,0 +1,2 @@
+``test_ssl`` is now checking for supported TLS version and protocols in more
+tests.