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Changelog
=========

0.9 - `master`_
~~~~~~~~~~~~~~~

.. note:: This version is not yet released and is under active development.

* Removed support for Python 3.2. This version of Python is rarely used
  and caused support headaches. Users affected by this should upgrade to 3.3+.
* Deprecated support for Python 2.6. At the time there is no time table for
  actually dropping support, however we strongly encourage all users to upgrade
  their Python, as Python 2.6 no longer receives support from the Python core
  team.
* Fixed compilation when using an OpenSSL which was compiled with the
  ``no-comp`` (``OPENSSL_NO_COMP``) option.
* Support :attr:`~cryptography.hazmat.primitives.serialization.Encoding.DER`
  serialization of public keys using the ``public_bytes`` method of
  :class:`~cryptography.hazmat.primitives.asymmetric.rsa.RSAPublicKeyWithSerialization`,
  :class:`~cryptography.hazmat.primitives.asymmetric.dsa.DSAPublicKeyWithSerialization`,
  and
  :class:`~cryptography.hazmat.primitives.asymmetric.ec.EllipticCurvePublicKeyWithSerialization`.
* Support :attr:`~cryptography.hazmat.primitives.serialization.Encoding.DER`
  serialization of private keys using the ``private_bytes`` method of
  :class:`~cryptography.hazmat.primitives.asymmetric.rsa.RSAPrivateKeyWithSerialization`,
  :class:`~cryptography.hazmat.primitives.asymmetric.dsa.DSAPrivateKeyWithSerialization`,
  and
  :class:`~cryptography.hazmat.primitives.asymmetric.ec.EllipticCurvePrivateKeyWithSerialization`.
* Add support for parsing X.509 certificate signing requests (CSRs) with
  :func:`~cryptography.x509.load_pem_x509_csr` and
  :func:`~cryptography.x509.load_der_x509_csr`.
* Moved ``cryptography.exceptions.InvalidToken`` to
  :class:`cryptography.hazmat.primitives.twofactor.InvalidToken` and deprecated
  the old location. This was moved to minimize confusion between this exception
  and :class:`cryptography.fernet.InvalidToken`.

0.8.2 - 2015-04-10
~~~~~~~~~~~~~~~~~~

* Fixed a race condition when initializing the OpenSSL or CommonCrypto backends
  in a multi-threaded scenario.

0.8.1 - 2015-03-20
~~~~~~~~~~~~~~~~~~

* Updated Windows wheels to be compiled against OpenSSL 1.0.2a.

0.8 - 2015-03-08
~~~~~~~~~~~~~~~~

* :func:`~cryptography.hazmat.primitives.serialization.load_ssh_public_key` can
  now load elliptic curve public keys.
* Added
  :attr:`~cryptography.x509.Certificate.signature_hash_algorithm` support to
  :class:`~cryptography.x509.Certificate`.
* Added
  :func:`~cryptography.hazmat.primitives.asymmetric.rsa.rsa_recover_prime_factors`
* :class:`~cryptography.hazmat.primitives.kdf.KeyDerivationFunction` was moved
  from :mod:`~cryptography.hazmat.primitives.interfaces` to
  :mod:`~cryptography.hazmat.primitives.kdf`.
* Added support for parsing X.509 names. See the
  :doc:`X.509 documentation</x509>` for more information.
* Added
  :func:`~cryptography.hazmat.primitives.serialization.load_der_private_key` to
  support loading of DER encoded private keys and
  :func:`~cryptography.hazmat.primitives.serialization.load_der_public_key` to
  support loading DER encoded public keys.
* Fixed building against LibreSSL, a compile-time substitute for OpenSSL.
* FreeBSD 9.2 was removed from the continuous integration system.
* Updated Windows wheels to be compiled against OpenSSL 1.0.2.
* :func:`~cryptography.hazmat.primitives.serialization.load_pem_public_key`
  and :func:`~cryptography.hazmat.primitives.serialization.load_der_public_key`
  now support PKCS1 RSA public keys (in addition to the previous support for
  SubjectPublicKeyInfo format for RSA, EC, and DSA).
* Added
  :class:`~cryptography.hazmat.primitives.asymmetric.ec.EllipticCurvePrivateKeyWithSerialization`
  and deprecated
  :class:`~cryptography.hazmat.primitives.asymmetric.ec.EllipticCurvePrivateKeyWithNumbers`.
* Added
  :meth:`~cryptography.hazmat.primitives.asymmetric.ec.EllipticCurvePrivateKeyWithSerialization.private_bytes`
  to
  :class:`~cryptography.hazmat.primitives.asymmetric.ec.EllipticCurvePrivateKeyWithSerialization`.
* Added
  :class:`~cryptography.hazmat.primitives.asymmetric.rsa.RSAPrivateKeyWithSerialization`
  and deprecated
  :class:`~cryptography.hazmat.primitives.asymmetric.rsa.RSAPrivateKeyWithNumbers`.
* Added
  :meth:`~cryptography.hazmat.primitives.asymmetric.rsa.RSAPrivateKeyWithSerialization.private_bytes`
  to
  :class:`~cryptography.hazmat.primitives.asymmetric.rsa.RSAPrivateKeyWithSerialization`.
* Added
  :class:`~cryptography.hazmat.primitives.asymmetric.dsa.DSAPrivateKeyWithSerialization`
  and deprecated
  :class:`~cryptography.hazmat.primitives.asymmetric.dsa.DSAPrivateKeyWithNumbers`.
* Added
  :meth:`~cryptography.hazmat.primitives.asymmetric.dsa.DSAPrivateKeyWithSerialization.private_bytes`
  to
  :class:`~cryptography.hazmat.primitives.asymmetric.dsa.DSAPrivateKeyWithSerialization`.
* Added
  :class:`~cryptography.hazmat.primitives.asymmetric.rsa.RSAPublicKeyWithSerialization`
  and deprecated
  :class:`~cryptography.hazmat.primitives.asymmetric.rsa.RSAPublicKeyWithNumbers`.
* Added
  :meth:`~cryptography.hazmat.primitives.asymmetric.rsa.RSAPublicKeyWithSerialization.public_bytes`
  to
  :class:`~cryptography.hazmat.primitives.asymmetric.rsa.RSAPublicKeyWithSerialization`.
* Added
  :class:`~cryptography.hazmat.primitives.asymmetric.ec.EllipticCurvePublicKeyWithSerialization`
  and deprecated
  :class:`~cryptography.hazmat.primitives.asymmetric.ec.EllipticCurvePublicKeyWithNumbers`.
* Added
  :meth:`~cryptography.hazmat.primitives.asymmetric.ec.EllipticCurvePublicKeyWithSerialization.public_bytes`
  to
  :class:`~cryptography.hazmat.primitives.asymmetric.ec.EllipticCurvePublicKeyWithSerialization`.
* Added
  :class:`~cryptography.hazmat.primitives.asymmetric.dsa.DSAPublicKeyWithSerialization`
  and deprecated
  :class:`~cryptography.hazmat.primitives.asymmetric.dsa.DSAPublicKeyWithNumbers`.
* Added
  :meth:`~cryptography.hazmat.primitives.asymmetric.dsa.DSAPublicKeyWithSerialization.public_bytes`
  to
  :class:`~cryptography.hazmat.primitives.asymmetric.dsa.DSAPublicKeyWithSerialization`.
* :class:`~cryptography.hazmat.primitives.hashes.HashAlgorithm` and
  :class:`~cryptography.hazmat.primitives.hashes.HashContext` were moved from
  :mod:`~cryptography.hazmat.primitives.interfaces` to
  :mod:`~cryptography.hazmat.primitives.hashes`.
* :class:`~cryptography.hazmat.primitives.ciphers.CipherContext`,
  :class:`~cryptography.hazmat.primitives.ciphers.AEADCipherContext`,
  :class:`~cryptography.hazmat.primitives.ciphers.AEADEncryptionContext`,
  :class:`~cryptography.hazmat.primitives.ciphers.CipherAlgorithm`, and
  :class:`~cryptography.hazmat.primitives.ciphers.BlockCipherAlgorithm`
  were moved from :mod:`~cryptography.hazmat.primitives.interfaces` to
  :mod:`~cryptography.hazmat.primitives.ciphers`.
* :class:`~cryptography.hazmat.primitives.ciphers.modes.Mode`,
  :class:`~cryptography.hazmat.primitives.ciphers.modes.ModeWithInitializationVector`,
  :class:`~cryptography.hazmat.primitives.ciphers.modes.ModeWithNonce`, and
  :class:`~cryptography.hazmat.primitives.ciphers.modes.ModeWithAuthenticationTag`
  were moved from :mod:`~cryptography.hazmat.primitives.interfaces` to
  :mod:`~cryptography.hazmat.primitives.ciphers.modes`.
* :class:`~cryptography.hazmat.primitives.padding.PaddingContext` was moved
  from :mod:`~cryptography.hazmat.primitives.interfaces` to
  :mod:`~cryptography.hazmat.primitives.padding`.
*
  :class:`~cryptography.hazmat.primitives.asymmetric.padding.AsymmetricPadding`
  was moved from :mod:`~cryptography.hazmat.primitives.interfaces` to
  :mod:`~cryptography.hazmat.primitives.asymmetric.padding`.
*
  :class:`~cryptography.hazmat.primitives.asymmetric.AsymmetricSignatureContext`
  and
  :class:`~cryptography.hazmat.primitives.asymmetric.AsymmetricVerificationContext`
  were moved from :mod:`~cryptography.hazmat.primitives.interfaces` to
  :mod:`~cryptography.hazmat.primitives.asymmetric`.
* :class:`~cryptography.hazmat.primitives.asymmetric.dsa.DSAParameters`,
  :class:`~cryptography.hazmat.primitives.asymmetric.dsa.DSAParametersWithNumbers`,
  :class:`~cryptography.hazmat.primitives.asymmetric.dsa.DSAPrivateKey`,
  :class:`~cryptography.hazmat.primitives.asymmetric.dsa.DSAPrivateKeyWithNumbers`,
  :class:`~cryptography.hazmat.primitives.asymmetric.dsa.DSAPublicKey` and
  :class:`~cryptography.hazmat.primitives.asymmetric.dsa.DSAPublicKeyWithNumbers`
  were moved from :mod:`~cryptography.hazmat.primitives.interfaces` to
  :mod:`~cryptography.hazmat.primitives.asymmetric.dsa`
* :class:`~cryptography.hazmat.primitives.asymmetric.ec.EllipticCurve`,
  :class:`~cryptography.hazmat.primitives.asymmetric.ec.EllipticCurveSignatureAlgorithm`,
  :class:`~cryptography.hazmat.primitives.asymmetric.ec.EllipticCurvePrivateKey`,
  :class:`~cryptography.hazmat.primitives.asymmetric.ec.EllipticCurvePrivateKeyWithNumbers`,
  :class:`~cryptography.hazmat.primitives.asymmetric.ec.EllipticCurvePublicKey`,
  and
  :class:`~cryptography.hazmat.primitives.asymmetric.ec.EllipticCurvePublicKeyWithNumbers`
  were moved from :mod:`~cryptography.hazmat.primitives.interfaces` to
  :mod:`~cryptography.hazmat.primitives.asymmetric.ec`.
* :class:`~cryptography.hazmat.primitives.asymmetric.rsa.RSAPrivateKey`,
  :class:`~cryptography.hazmat.primitives.asymmetric.rsa.RSAPrivateKeyWithNumbers`,
  :class:`~cryptography.hazmat.primitives.asymmetric.rsa.RSAPublicKey` and
  :class:`~cryptography.hazmat.primitives.asymmetric.rsa.RSAPublicKeyWithNumbers`
  were moved from :mod:`~cryptography.hazmat.primitives.interfaces` to
  :mod:`~cryptography.hazmat.primitives.asymmetric.rsa`.

0.7.2 - 2015-01-16
~~~~~~~~~~~~~~~~~~

* Updated Windows wheels to be compiled against OpenSSL 1.0.1l.
* ``enum34`` is no longer installed on Python 3.4, where it is included in
  the standard library.
* Added a new function to the OpenSSL bindings to support additional
  functionality in pyOpenSSL.

0.7.1 - 2014-12-28
~~~~~~~~~~~~~~~~~~

* Fixed an issue preventing compilation on platforms where ``OPENSSL_NO_SSL3``
  was defined.

0.7 - 2014-12-17
~~~~~~~~~~~~~~~~

* Cryptography has been relicensed from the Apache Software License, Version
  2.0, to being available under *either* the Apache Software License, Version
  2.0, or the BSD license.
* Added key-rotation support to :doc:`Fernet </fernet>` with
  :class:`~cryptography.fernet.MultiFernet`.
* More bit-lengths are now supported for ``p`` and ``q`` when loading DSA keys
  from numbers.
* Added :class:`~cryptography.hazmat.primitives.interfaces.MACContext` as a
  common interface for CMAC and HMAC and deprecated ``CMACContext``.
* Added support for encoding and decoding :rfc:`6979` signatures in
  :doc:`/hazmat/primitives/asymmetric/utils`.
* Added
  :func:`~cryptography.hazmat.primitives.serialization.load_ssh_public_key` to
  support the loading of OpenSSH public keys (:rfc:`4253`). Only RSA and DSA
  keys are currently supported.
* Added initial support for X.509 certificate parsing. See the
  :doc:`X.509 documentation</x509>` for more information.

0.6.1 - 2014-10-15
~~~~~~~~~~~~~~~~~~

* Updated Windows wheels to be compiled against OpenSSL 1.0.1j.
* Fixed an issue where OpenSSL 1.0.1j changed the errors returned by some
  functions.
* Added our license file to the ``cryptography-vectors`` package.
* Implemented DSA hash truncation support (per FIPS 186-3) in the OpenSSL
  backend. This works around an issue in 1.0.0, 1.0.0a, and 1.0.0b where
  truncation was not implemented.

0.6 - 2014-09-29
~~~~~~~~~~~~~~~~

* Added
  :func:`~cryptography.hazmat.primitives.serialization.load_pem_private_key` to
  ease loading private keys, and
  :func:`~cryptography.hazmat.primitives.serialization.load_pem_public_key` to
  support loading public keys.
* Removed the, deprecated in 0.4, support for the ``salt_length`` argument to
  the :class:`~cryptography.hazmat.primitives.asymmetric.padding.MGF1`
  constructor. The ``salt_length`` should be passed to
  :class:`~cryptography.hazmat.primitives.asymmetric.padding.PSS` instead.
* Fix compilation on OS X Yosemite.
* Deprecated ``elliptic_curve_private_key_from_numbers`` and
  ``elliptic_curve_public_key_from_numbers`` in favor of
  ``load_elliptic_curve_private_numbers`` and
  ``load_elliptic_curve_public_numbers`` on
  :class:`~cryptography.hazmat.backends.interfaces.EllipticCurveBackend`.
* Added ``EllipticCurvePrivateKeyWithNumbers`` and
  ``EllipticCurvePublicKeyWithNumbers`` support.
* Work around three GCM related bugs in CommonCrypto and OpenSSL.

  * On the CommonCrypto backend adding AAD but not subsequently calling update
    would return null tag bytes.

  * One the CommonCrypto backend a call to update without an empty add AAD call
    would return null ciphertext bytes.

  * On the OpenSSL backend with certain versions adding AAD only would give
    invalid tag bytes.

* Support loading EC private keys from PEM.

0.5.4 - 2014-08-20
~~~~~~~~~~~~~~~~~~

* Added several functions to the OpenSSL bindings to support new
  functionality in pyOpenSSL.
* Fixed a redefined constant causing compilation failure with Solaris 11.2.

0.5.3 - 2014-08-06
~~~~~~~~~~~~~~~~~~

* Updated Windows wheels to be compiled against OpenSSL 1.0.1i.

0.5.2 - 2014-07-09
~~~~~~~~~~~~~~~~~~

* Add ``TraditionalOpenSSLSerializationBackend`` support to
  :doc:`/hazmat/backends/multibackend`.
* Fix compilation error on OS X 10.8 (Mountain Lion).

0.5.1 - 2014-07-07
~~~~~~~~~~~~~~~~~~

* Add ``PKCS8SerializationBackend`` support to
  :doc:`/hazmat/backends/multibackend`.

0.5 - 2014-07-07
~~~~~~~~~~~~~~~~

* **BACKWARDS INCOMPATIBLE:**
  :class:`~cryptography.hazmat.primitives.ciphers.modes.GCM` no longer allows
  truncation of tags by default. Previous versions of ``cryptography`` allowed
  tags to be truncated by default, applications wishing to preserve this
  behavior (not recommended) can pass the ``min_tag_length`` argument.
* Windows builds now statically link OpenSSL by default. When installing a
  wheel on Windows you no longer need to install OpenSSL separately. Windows
  users can switch between static and dynamic linking with an environment
  variable. See :doc:`/installation` for more details.
* Added :class:`~cryptography.hazmat.primitives.kdf.hkdf.HKDFExpand`.
* Added :class:`~cryptography.hazmat.primitives.ciphers.modes.CFB8` support
  for :class:`~cryptography.hazmat.primitives.ciphers.algorithms.AES` and
  :class:`~cryptography.hazmat.primitives.ciphers.algorithms.TripleDES` on
  :doc:`/hazmat/backends/commoncrypto` and :doc:`/hazmat/backends/openssl`.
* Added ``AES`` :class:`~cryptography.hazmat.primitives.ciphers.modes.CTR`
  support to the OpenSSL backend when linked against 0.9.8.
* Added ``PKCS8SerializationBackend`` and
  ``TraditionalOpenSSLSerializationBackend`` support to the
  :doc:`/hazmat/backends/openssl`.
* Added :doc:`/hazmat/primitives/asymmetric/ec` and
  :class:`~cryptography.hazmat.backends.interfaces.EllipticCurveBackend`.
* Added :class:`~cryptography.hazmat.primitives.ciphers.modes.ECB` support
  for :class:`~cryptography.hazmat.primitives.ciphers.algorithms.TripleDES` on
  :doc:`/hazmat/backends/commoncrypto` and :doc:`/hazmat/backends/openssl`.
* Deprecated the concrete ``RSAPrivateKey`` class in favor of backend
  specific providers of the
  :class:`cryptography.hazmat.primitives.asymmetric.rsa.RSAPrivateKey`
  interface.
* Deprecated the concrete ``RSAPublicKey`` in favor of backend specific
  providers of the
  :class:`cryptography.hazmat.primitives.asymmetric.rsa.RSAPublicKey`
  interface.
* Deprecated the concrete ``DSAPrivateKey`` class in favor of backend
  specific providers of the
  :class:`cryptography.hazmat.primitives.asymmetric.dsa.DSAPrivateKey`
  interface.
* Deprecated the concrete ``DSAPublicKey`` class in favor of backend specific
  providers of the
  :class:`cryptography.hazmat.primitives.asymmetric.dsa.DSAPublicKey`
  interface.
* Deprecated the concrete ``DSAParameters`` class in favor of backend specific
  providers of the
  :class:`cryptography.hazmat.primitives.asymmetric.dsa.DSAParameters`
  interface.
* Deprecated ``encrypt_rsa``, ``decrypt_rsa``, ``create_rsa_signature_ctx`` and
  ``create_rsa_verification_ctx`` on
  :class:`~cryptography.hazmat.backends.interfaces.RSABackend`.
* Deprecated ``create_dsa_signature_ctx`` and ``create_dsa_verification_ctx``
  on :class:`~cryptography.hazmat.backends.interfaces.DSABackend`.

0.4 - 2014-05-03
~~~~~~~~~~~~~~~~

* Deprecated ``salt_length`` on
  :class:`~cryptography.hazmat.primitives.asymmetric.padding.MGF1` and added it
  to :class:`~cryptography.hazmat.primitives.asymmetric.padding.PSS`. It will
  be removed from ``MGF1`` in two releases per our :doc:`/api-stability`
  policy.
* Added :class:`~cryptography.hazmat.primitives.ciphers.algorithms.SEED`
  support.
* Added :class:`~cryptography.hazmat.primitives.cmac.CMAC`.
* Added decryption support to
  :class:`~cryptography.hazmat.primitives.asymmetric.rsa.RSAPrivateKey`
  and encryption support to
  :class:`~cryptography.hazmat.primitives.asymmetric.rsa.RSAPublicKey`.
* Added signature support to
  :class:`~cryptography.hazmat.primitives.asymmetric.dsa.DSAPrivateKey`
  and verification support to
  :class:`~cryptography.hazmat.primitives.asymmetric.dsa.DSAPublicKey`.

0.3 - 2014-03-27
~~~~~~~~~~~~~~~~

* Added :class:`~cryptography.hazmat.primitives.twofactor.hotp.HOTP`.
* Added :class:`~cryptography.hazmat.primitives.twofactor.totp.TOTP`.
* Added :class:`~cryptography.hazmat.primitives.ciphers.algorithms.IDEA`
  support.
* Added signature support to
  :class:`~cryptography.hazmat.primitives.asymmetric.rsa.RSAPrivateKey`
  and verification support to
  :class:`~cryptography.hazmat.primitives.asymmetric.rsa.RSAPublicKey`.
* Moved test vectors to the new ``cryptography_vectors`` package.

0.2.2 - 2014-03-03
~~~~~~~~~~~~~~~~~~

* Removed a constant definition that was causing compilation problems with
  specific versions of OpenSSL.

0.2.1 - 2014-02-22
~~~~~~~~~~~~~~~~~~

* Fix a bug where importing cryptography from multiple paths could cause
  initialization to fail.

0.2 - 2014-02-20
~~~~~~~~~~~~~~~~

* Added :doc:`/hazmat/backends/commoncrypto`.
* Added initial :doc:`/hazmat/bindings/commoncrypto`.
* Removed ``register_cipher_adapter`` method from
  :class:`~cryptography.hazmat.backends.interfaces.CipherBackend`.
* Added support for the OpenSSL backend under Windows.
* Improved thread-safety for the OpenSSL backend.
* Fixed compilation on systems where OpenSSL's ``ec.h`` header is not
  available, such as CentOS.
* Added :class:`~cryptography.hazmat.primitives.kdf.pbkdf2.PBKDF2HMAC`.
* Added :class:`~cryptography.hazmat.primitives.kdf.hkdf.HKDF`.
* Added :doc:`/hazmat/backends/multibackend`.
* Set default random for the :doc:`/hazmat/backends/openssl` to the OS
  random engine.
* Added :class:`~cryptography.hazmat.primitives.ciphers.algorithms.CAST5`
  (CAST-128) support.

0.1 - 2014-01-08
~~~~~~~~~~~~~~~~

* Initial release.

.. _`master`: https://github.com/pyca/cryptography/