Cryptography

~~~~~~~~~~~~~~~~~~~

* Fixed performance regression loading DH public keys.
* Fixed a memory leak when using
:class:`~cryptography.hazmat.primitives.ciphers.aead.ChaCha20Poly1305`.
* Updated Windows, macOS, and Linux wheels to be compiled with OpenSSL 3.1.2.

.. _v41-0-2:

~~~~~~~~~~~~~~~~~~~

* Fixed bugs in creating and parsing SSH certificates where critical options
with values were handled incorrectly. Certificates are now created correctly
and parsing accepts correct values as well as the previously generated
invalid forms with a warning. In the next release, support for parsing these
invalid forms will be removed.

.. _v41-0-1:

~~~~~~~~~~~~~~~~~~~

* Temporarily allow invalid ECDSA signature algorithm parameters in X.509
certificates, which are generated by older versions of Java.
* Allow null bytes in pass phrases when serializing private keys.

.. _v41-0-0:

~~~~~~~~~~~~~~~~~~~

* **BACKWARDS INCOMPATIBLE:** Support for OpenSSL less than 1.1.1d has been
removed. Users on older version of OpenSSL will need to upgrade.
* **BACKWARDS INCOMPATIBLE:** Support for Python 3.6 has been removed.
* **BACKWARDS INCOMPATIBLE:** Dropped support for LibreSSL < 3.6.
* Updated the minimum supported Rust version (MSRV) to 1.56.0, from 1.48.0.
* Updated Windows, macOS, and Linux wheels to be compiled with OpenSSL 3.1.1.
* Added support for the :class:`~cryptography.x509.OCSPAcceptableResponses`
OCSP extension.
* Added support for the :class:`~cryptography.x509.MSCertificateTemplate`
proprietary Microsoft certificate extension.
* Implemented support for equality checks on all asymmetric public key types.
* Added support for ``aes256-gcmopenssh.com`` encrypted keys in
:func:`~cryptography.hazmat.primitives.serialization.load_ssh_private_key`.
* Added support for obtaining X.509 certificate signature algorithm parameters
(including PSS) via
:meth:`~cryptography.x509.Certificate.signature_algorithm_parameters`.
* Support signing :class:`~cryptography.hazmat.primitives.asymmetric.padding.PSS`
X.509 certificates via the new keyword-only argument ``rsa_padding`` on
:meth:`~cryptography.x509.CertificateBuilder.sign`.
* Added support for
:class:`~cryptography.hazmat.primitives.ciphers.aead.ChaCha20Poly1305`
on BoringSSL.

.. _v40-0-2:

~~~~~~~~~~~~~~~~~~~

* Fixed compilation when using LibreSSL 3.7.2.
* Added some functions to support an upcoming ``pyOpenSSL`` release.

.. _v40-0-1:

~~~~~~~~~~~~~~~~~~~

* Fixed a bug where certain operations would fail if an object happened to be
in the top-half of the memory-space. This only impacted 32-bit systems.

.. _v40-0-0: