gh-94172: Remove ssl.PROTOCOL_SSLv2 dead code (#94312)

Remove dead code related to ssl.PROTOCOL_SSLv2. ssl.PROTOCOL_SSLv2
was already removed in Python 3.10.

In test_ssl, @requires_tls_version('SSLv2') always returned False.

Extract of the removed code: "OpenSSL has removed support for SSLv2".

1 files changed, 0 insertions, 39 deletions

diff --git a/Lib/test/test_ssl.py b/Lib/test/test_ssl.py
index 559eea9..544adad 100644
--- a/Lib/test/test_ssl.py
+++ b/Lib/test/test_ssl.py
@@ -208,10 +208,6 @@ def has_tls_version(version):
     :param version: TLS version name or ssl.TLSVersion member
     :return: bool
     """
-    if version == "SSLv2":
-        # never supported and not even in TLSVersion enum
-        return False
-
     if isinstance(version, str):
         version = ssl.TLSVersion.__members__[version]
 
@@ -3129,37 +3125,10 @@ class ThreadedTests(unittest.TestCase):
                     self.assertIn(msg, repr(e))
                     self.assertIn('certificate verify failed', repr(e))
 
-    @requires_tls_version('SSLv2')
-    def test_protocol_sslv2(self):
-        """Connecting to an SSLv2 server with various client options"""
-        if support.verbose:
-            sys.stdout.write("\n")
-        try_protocol_combo(ssl.PROTOCOL_SSLv2, ssl.PROTOCOL_SSLv2, True)
-        try_protocol_combo(ssl.PROTOCOL_SSLv2, ssl.PROTOCOL_SSLv2, True, ssl.CERT_OPTIONAL)
-        try_protocol_combo(ssl.PROTOCOL_SSLv2, ssl.PROTOCOL_SSLv2, True, ssl.CERT_REQUIRED)
-        try_protocol_combo(ssl.PROTOCOL_SSLv2, ssl.PROTOCOL_TLS, False)
-        if has_tls_version('SSLv3'):
-            try_protocol_combo(ssl.PROTOCOL_SSLv2, ssl.PROTOCOL_SSLv3, False)
-        try_protocol_combo(ssl.PROTOCOL_SSLv2, ssl.PROTOCOL_TLSv1, False)
-        # SSLv23 client with specific SSL options
-        try_protocol_combo(ssl.PROTOCOL_SSLv2, ssl.PROTOCOL_TLS, False,
-                           client_options=ssl.OP_NO_SSLv3)
-        try_protocol_combo(ssl.PROTOCOL_SSLv2, ssl.PROTOCOL_TLS, False,
-                           client_options=ssl.OP_NO_TLSv1)
-
     def test_PROTOCOL_TLS(self):
         """Connecting to an SSLv23 server with various client options"""
         if support.verbose:
             sys.stdout.write("\n")
-        if has_tls_version('SSLv2'):
-            try:
-                try_protocol_combo(ssl.PROTOCOL_TLS, ssl.PROTOCOL_SSLv2, True)
-            except OSError as x:
-                # this fails on some older versions of OpenSSL (0.9.7l, for instance)
-                if support.verbose:
-                    sys.stdout.write(
-                        " SSL2 client to SSL23 server test unexpectedly failed:\n %s\n"
-                        % str(x))
         if has_tls_version('SSLv3'):
             try_protocol_combo(ssl.PROTOCOL_TLS, ssl.PROTOCOL_SSLv3, False)
         try_protocol_combo(ssl.PROTOCOL_TLS, ssl.PROTOCOL_TLS, True)
@@ -3197,8 +3166,6 @@ class ThreadedTests(unittest.TestCase):
         try_protocol_combo(ssl.PROTOCOL_SSLv3, ssl.PROTOCOL_SSLv3, 'SSLv3')
         try_protocol_combo(ssl.PROTOCOL_SSLv3, ssl.PROTOCOL_SSLv3, 'SSLv3', ssl.CERT_OPTIONAL)
         try_protocol_combo(ssl.PROTOCOL_SSLv3, ssl.PROTOCOL_SSLv3, 'SSLv3', ssl.CERT_REQUIRED)
-        if has_tls_version('SSLv2'):
-            try_protocol_combo(ssl.PROTOCOL_SSLv3, ssl.PROTOCOL_SSLv2, False)
         try_protocol_combo(ssl.PROTOCOL_SSLv3, ssl.PROTOCOL_TLS, False,
                            client_options=ssl.OP_NO_SSLv3)
         try_protocol_combo(ssl.PROTOCOL_SSLv3, ssl.PROTOCOL_TLSv1, False)
@@ -3211,8 +3178,6 @@ class ThreadedTests(unittest.TestCase):
         try_protocol_combo(ssl.PROTOCOL_TLSv1, ssl.PROTOCOL_TLSv1, 'TLSv1')
         try_protocol_combo(ssl.PROTOCOL_TLSv1, ssl.PROTOCOL_TLSv1, 'TLSv1', ssl.CERT_OPTIONAL)
         try_protocol_combo(ssl.PROTOCOL_TLSv1, ssl.PROTOCOL_TLSv1, 'TLSv1', ssl.CERT_REQUIRED)
-        if has_tls_version('SSLv2'):
-            try_protocol_combo(ssl.PROTOCOL_TLSv1, ssl.PROTOCOL_SSLv2, False)
         if has_tls_version('SSLv3'):
             try_protocol_combo(ssl.PROTOCOL_TLSv1, ssl.PROTOCOL_SSLv3, False)
         try_protocol_combo(ssl.PROTOCOL_TLSv1, ssl.PROTOCOL_TLS, False,
@@ -3225,8 +3190,6 @@ class ThreadedTests(unittest.TestCase):
         if support.verbose:
             sys.stdout.write("\n")
         try_protocol_combo(ssl.PROTOCOL_TLSv1_1, ssl.PROTOCOL_TLSv1_1, 'TLSv1.1')
-        if has_tls_version('SSLv2'):
-            try_protocol_combo(ssl.PROTOCOL_TLSv1_1, ssl.PROTOCOL_SSLv2, False)
         if has_tls_version('SSLv3'):
             try_protocol_combo(ssl.PROTOCOL_TLSv1_1, ssl.PROTOCOL_SSLv3, False)
         try_protocol_combo(ssl.PROTOCOL_TLSv1_1, ssl.PROTOCOL_TLS, False,
@@ -3245,8 +3208,6 @@ class ThreadedTests(unittest.TestCase):
         try_protocol_combo(ssl.PROTOCOL_TLSv1_2, ssl.PROTOCOL_TLSv1_2, 'TLSv1.2',
                            server_options=ssl.OP_NO_SSLv3|ssl.OP_NO_SSLv2,
                            client_options=ssl.OP_NO_SSLv3|ssl.OP_NO_SSLv2,)
-        if has_tls_version('SSLv2'):
-            try_protocol_combo(ssl.PROTOCOL_TLSv1_2, ssl.PROTOCOL_SSLv2, False)
         if has_tls_version('SSLv3'):
             try_protocol_combo(ssl.PROTOCOL_TLSv1_2, ssl.PROTOCOL_SSLv3, False)
         try_protocol_combo(ssl.PROTOCOL_TLSv1_2, ssl.PROTOCOL_TLS, False,