Issue #28025: Convert all ssl module constants to IntEnum and IntFlags.

Doc/library/ssl.rst

@@ -515,6 +515,10 @@ Certificate handling
 Constants
 ^^^^^^^^^
 
+   All constants are now :class:`enum.IntEnum` or :class:`enum.IntFlag` collections.
+
+   .. versionadded:: 3.6
+
 .. data:: CERT_NONE
 
    Possible value for :attr:`SSLContext.verify_mode`, or the ``cert_reqs``
@@ -548,6 +552,12 @@ Constants
    be passed, either to :meth:`SSLContext.load_verify_locations` or as a
    value of the ``ca_certs`` parameter to :func:`wrap_socket`.
 
+.. class:: VerifyMode
+
+   :class:`enum.IntEnum` collection of CERT_* constants.
+
+   .. versionadded:: 3.6
+
 .. data:: VERIFY_DEFAULT
 
    Possible value for :attr:`SSLContext.verify_flags`. In this mode, certificate
@@ -588,6 +598,12 @@ Constants
 
    .. versionadded:: 3.4.4
 
+.. class:: VerifyFlags
+
+   :class:`enum.IntFlag` collection of VERIFY_* constants.
+
+   .. versionadded:: 3.6
+
 .. data:: PROTOCOL_TLS
 
    Selects the highest protocol version that both the client and server support.
@@ -757,6 +773,12 @@ Constants
 
    .. versionadded:: 3.3
 
+.. class:: Options
+
+   :class:`enum.IntFlag` collection of OP_* constants.
+
+   .. versionadded:: 3.6
+
 .. data:: HAS_ALPN
 
    Whether the OpenSSL library has built-in support for the *Application-Layer
@@ -839,6 +861,12 @@ Constants
 
    .. versionadded:: 3.4
 
+.. class:: AlertDescription
+
+   :class:`enum.IntEnum` collection of ALERT_DESCRIPTION_* constants.
+
+   .. versionadded:: 3.6
+
 .. data:: Purpose.SERVER_AUTH
 
    Option for :func:`create_default_context` and
@@ -857,6 +885,12 @@ Constants
 
    .. versionadded:: 3.4
 
+.. class:: SSLErrorNumber
+
+   :class:`enum.IntEnum` collection of SSL_ERROR_* constants.
+
+   .. versionadded:: 3.6
+
 
 SSL Sockets
 -----------
@@ -1540,6 +1574,12 @@ to speed up repeated connections from the same clients.
       to set options, not to clear them.  Attempting to clear an option
       (by resetting the corresponding bits) will raise a ``ValueError``.
 
+   .. versionchanged:: 3.6
+      :attr:`SSLContext.options` returns :class:`Options` flags:
+
+         >>> ssl.create_default_context().options
+         <Options.OP_ALL|OP_NO_SSLv3|OP_NO_SSLv2|OP_NO_COMPRESSION: 2197947391>
+
 .. attribute:: SSLContext.protocol
 
    The protocol version chosen when constructing the context.  This attribute
@@ -1554,12 +1594,23 @@ to speed up repeated connections from the same clients.
 
    .. versionadded:: 3.4
 
+   .. versionchanged:: 3.6
+      :attr:`SSLContext.verify_flags` returns :class:`VerifyFlags` flags:
+
+         >>> ssl.create_default_context().verify_flags
+         <VerifyFlags.VERIFY_X509_TRUSTED_FIRST: 32768>
+
 .. attribute:: SSLContext.verify_mode
 
    Whether to try to verify other peers' certificates and how to behave
    if verification fails.  This attribute must be one of
    :data:`CERT_NONE`, :data:`CERT_OPTIONAL` or :data:`CERT_REQUIRED`.
 
+   .. versionchanged:: 3.6
+      :attr:`SSLContext.verify_mode` returns :class:`VerifyMode` enum:
+
+         >>> ssl.create_default_context().verify_mode
+         <VerifyMode.CERT_REQUIRED: 2>
 
 .. index:: single: certificates
 

Lib/ssl.py

@@ -94,7 +94,7 @@ import re
 import sys
 import os
 from collections import namedtuple
-from enum import Enum as _Enum, IntEnum as _IntEnum
+from enum import Enum as _Enum, IntEnum as _IntEnum, IntFlag as _IntFlag
 
 import _ssl             # if we can't import it, let the error propagate
 
@@ -104,7 +104,6 @@ from _ssl import (
     SSLError, SSLZeroReturnError, SSLWantReadError, SSLWantWriteError,
     SSLSyscallError, SSLEOFError,
     )
-from _ssl import CERT_NONE, CERT_OPTIONAL, CERT_REQUIRED
 from _ssl import txt2obj as _txt2obj, nid2obj as _nid2obj
 from _ssl import RAND_status, RAND_add, RAND_bytes, RAND_pseudo_bytes
 try:
@@ -113,32 +112,47 @@ except ImportError:
     # LibreSSL does not provide RAND_egd
     pass
 
-def _import_symbols(prefix):
-    for n in dir(_ssl):
-        if n.startswith(prefix):
-            globals()[n] = getattr(_ssl, n)
-
-_import_symbols('OP_')
-_import_symbols('ALERT_DESCRIPTION_')
-_import_symbols('SSL_ERROR_')
-_import_symbols('VERIFY_')
 
 from _ssl import HAS_SNI, HAS_ECDH, HAS_NPN, HAS_ALPN
-
 from _ssl import _OPENSSL_API_VERSION
 
+
 _IntEnum._convert(
     '_SSLMethod', __name__,
     lambda name: name.startswith('PROTOCOL_') and name != 'PROTOCOL_SSLv23',
     source=_ssl)
 
+_IntFlag._convert(
+    'Options', __name__,
+    lambda name: name.startswith('OP_'),
+    source=_ssl)
+
+_IntEnum._convert(
+    'AlertDescription', __name__,
+    lambda name: name.startswith('ALERT_DESCRIPTION_'),
+    source=_ssl)
+
+_IntEnum._convert(
+    'SSLErrorNumber', __name__,
+    lambda name: name.startswith('SSL_ERROR_'),
+    source=_ssl)
+
+_IntFlag._convert(
+    'VerifyFlags', __name__,
+    lambda name: name.startswith('VERIFY_'),
+    source=_ssl)
+
+_IntEnum._convert(
+    'VerifyMode', __name__,
+    lambda name: name.startswith('CERT_'),
+    source=_ssl)
+
+
 PROTOCOL_SSLv23 = _SSLMethod.PROTOCOL_SSLv23 = _SSLMethod.PROTOCOL_TLS
 _PROTOCOL_NAMES = {value: name for name, value in _SSLMethod.__members__.items()}
 
-try:
-    _SSLv2_IF_EXISTS = PROTOCOL_SSLv2
-except NameError:
-    _SSLv2_IF_EXISTS = None
+_SSLv2_IF_EXISTS = getattr(_SSLMethod, 'PROTOCOL_SSLv2', None)
+
 
 if sys.platform == "win32":
     from _ssl import enum_certificates, enum_crls
@@ -434,6 +448,34 @@ class SSLContext(_SSLContext):
                 self._load_windows_store_certs(storename, purpose)
         self.set_default_verify_paths()
 
+    @property
+    def options(self):
+        return Options(super().options)
+
+    @options.setter
+    def options(self, value):
+        super(SSLContext, SSLContext).options.__set__(self, value)
+
+    @property
+    def verify_flags(self):
+        return VerifyFlags(super().verify_flags)
+
+    @verify_flags.setter
+    def verify_flags(self, value):
+        super(SSLContext, SSLContext).verify_flags.__set__(self, value)
+
+    @property
+    def verify_mode(self):
+        value = super().verify_mode
+        try:
+            return VerifyMode(value)
+        except ValueError:
+            return value
+
+    @verify_mode.setter
+    def verify_mode(self, value):
+        super(SSLContext, SSLContext).verify_mode.__set__(self, value)
+
 
 def create_default_context(purpose=Purpose.SERVER_AUTH, *, cafile=None,
                            capath=None, cadata=None):

Misc/NEWS

@@ -122,6 +122,9 @@ Core and Builtins
 Library
 -------
 
+- Issue #28025: Convert all ssl module constants to IntEnum and IntFlags.
+  SSLContext properties now return flags and enums.
+
 - Issue #433028: Added support of modifier spans in regular expressions.
 
 - Issue #24594: Validates persist parameter when opening MSI database