Update cryptography to 2.2.2

[pyup-bot]

This PR updates cryptography from 2.0.3 to 2.2.2.

Changelog

2.2.1

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

* Reverted a change to ``GeneralNames`` which prohibited having zero elements,
due to breakages.
* Fixed a bug in
:func:`~cryptography.hazmat.primitives.keywrap.aes_key_unwrap_with_padding`
that caused it to raise ``InvalidUnwrap`` when key length modulo 8 was
zero.


.. _v2-2:

2.2

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

* **BACKWARDS INCOMPATIBLE:** Support for Python 2.6 has been dropped.
* Resolved a bug in ``HKDF`` that incorrectly constrained output size.
* Added :class:`~cryptography.hazmat.primitives.asymmetric.ec.BrainpoolP256R1`,
:class:`~cryptography.hazmat.primitives.asymmetric.ec.BrainpoolP384R1`, and
:class:`~cryptography.hazmat.primitives.asymmetric.ec.BrainpoolP512R1` to
support inter-operating with systems like German smart meters.
* Added token rotation support to :doc:`Fernet </fernet>` with
:meth:`~cryptography.fernet.MultiFernet.rotate`.
* Fixed a memory leak in
:func:`~cryptography.hazmat.primitives.asymmetric.ec.derive_private_key`.
* Added support for AES key wrapping with padding via
:func:`~cryptography.hazmat.primitives.keywrap.aes_key_wrap_with_padding`
and
:func:`~cryptography.hazmat.primitives.keywrap.aes_key_unwrap_with_padding`
.
* Allow loading DSA keys with 224 bit ``q``.

.. _v2-1-4:

2.1.4

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

* Added ``X509_up_ref`` for an upcoming ``pyOpenSSL`` release.

.. _v2-1-3:

2.1.3

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

* Updated Windows, macOS, and ``manylinux1`` wheels to be compiled with
OpenSSL 1.1.0g.

.. _v2-1-2:

2.1.2

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

* Corrected a bug with the ``manylinux1`` wheels where OpenSSL's stack was
marked executable.

.. _v2-1-1:

2.1.1

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

* Fixed support for install with the system ``pip`` on Ubuntu 16.04.

.. _v2-1:

2.1

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

* **FINAL DEPRECATION** Python 2.6 support is deprecated, and will be removed
in the next release of ``cryptography``.
* **BACKWARDS INCOMPATIBLE:** ``Whirlpool``, ``RIPEMD160``, and
``UnsupportedExtension`` have been removed in accordance with our
:doc:`/api-stability` policy.
* **BACKWARDS INCOMPATIBLE:**
:attr:`DNSName.value <cryptography.x509.DNSName.value>`,
:attr:`RFC822Name.value <cryptography.x509.RFC822Name.value>`, and
:attr:`UniformResourceIdentifier.value
<cryptography.x509.UniformResourceIdentifier.value>`
will now return an :term:`A-label` string when parsing a certificate
containing an internationalized domain name (IDN) or if the caller passed
a :term:`U-label` to the constructor. See below for additional deprecations
related to this change.
* Installing ``cryptography`` now requires ``pip`` 6 or newer.
* Deprecated passing :term:`U-label` strings to the
:class:`~cryptography.x509.DNSName`,
:class:`~cryptography.x509.UniformResourceIdentifier`, and
:class:`~cryptography.x509.RFC822Name` constructors. Instead, users should
pass values as :term:`A-label` strings with ``idna`` encoding if necessary.
This change will not affect anyone who is not processing internationalized
domains.
* Added support for
:class:`~cryptography.hazmat.primitives.ciphers.algorithms.ChaCha20`. In
most cases users should choose
:class:`~cryptography.hazmat.primitives.ciphers.aead.ChaCha20Poly1305`
rather than using this unauthenticated form.
* Added :meth:`~cryptography.x509.CertificateRevocationList.is_signature_valid`
to :class:`~cryptography.x509.CertificateRevocationList`.
* Support :class:`~cryptography.hazmat.primitives.hashes.BLAKE2b` and
:class:`~cryptography.hazmat.primitives.hashes.BLAKE2s` with
:class:`~cryptography.hazmat.primitives.hmac.HMAC`.
* Added support for
:class:`~cryptography.hazmat.primitives.ciphers.modes.XTS` mode for
AES.
* Added support for using labels with
:class:`~cryptography.hazmat.primitives.asymmetric.padding.OAEP` when using
OpenSSL 1.0.2 or greater.
* Improved compatibility with NSS when issuing certificates from an issuer
that has a subject with non-``UTF8String`` string types.
* Add support for the :class:`~cryptography.x509.DeltaCRLIndicator` extension.
* Add support for the :class:`~cryptography.x509.TLSFeature`
extension. This is commonly used for enabling ``OCSP Must-Staple`` in
certificates.
* Add support for the :class:`~cryptography.x509.FreshestCRL` extension.

.. _v2-0-3:

Links

• PyPI: https://pypi.python.org/pypi/cryptography
• Changelog: https://pyup.io/changelogs/cryptography/
• Repo: https://github.com/pyca/cryptography