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gh-118596: Add thread-safety clarifications to the SSLContext documentation #118597

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Jun 16, 2024
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gh-118596: Add thread-safety clarifications to the SSLContext documentation #118597

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13 changes: 13 additions & 0 deletions Doc/library/ssl.rst
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Expand Up @@ -1472,6 +1472,19 @@ to speed up repeated connections from the same clients.
:data:`PROTOCOL_TLS`, :data:`PROTOCOL_TLS_CLIENT`, and
:data:`PROTOCOL_TLS_SERVER` use TLS 1.2 as minimum TLS version.

.. note::

:class:`SSLContext` only supports limited mutation once it has been used
by a connection. Adding new certificates to the internal trust store is
allowed, but changing ciphers, verification settings, or mTLS
certificates may result in surprising behavior.

.. note::

:class:`SSLContext` is designed to be shared and used by multiple
connections.
Thus, it is thread-safe as long as it is not reconfigured after being
used by a connection.

:class:`SSLContext` objects have the following methods and attributes:

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