Awsencryption

===================

Bugfixes
--------
* AWS KMS master key/provider user agent extension fixed.
`47 <https://github.com/awslabs/aws-encryption-sdk-python/pull/47>`_

Maintenance
-----------
* New minimum pytest version 3.3.1 to avoid bugs in 3.3.0
`32 <https://github.com/awslabs/aws-encryption-sdk-python/issues/32>`_
* New minimum attrs version 17.4.0 to allow use of `converter` rather than `convert`
`39 <https://github.com/awslabs/aws-encryption-sdk-python/issues/39>`_
* Algorithm Suites are modeled as collections of sub-suites now
`36 <https://github.com/awslabs/aws-encryption-sdk-python/pull/36>`_
* Selecting test suites is more sane now, with pytest markers.
`41 <https://github.com/awslabs/aws-encryption-sdk-python/pull/41>`_

===================

Bugfixes
--------
* Remove use of attrs functionality deprecated in 17.3.0
`29 <https://github.com/awslabs/aws-encryption-sdk-python/issues/29>`_

Maintenance
-----------
* Blacklisted pytest 3.3.0
`32 <https://github.com/awslabs/aws-encryption-sdk-python/issues/32>`_
`pytest-dev/pytest2957 <https://github.com/pytest-dev/pytest/issues/2957>`_

===================
* Addressed `issue 13 <https://github.com/awslabs/aws-encryption-sdk-python/issues/13>`_
to properly handle non-seekable source streams.

===================

Reorganization
--------------
* Moved source into ``src``.
* Moved examples into ``examples``.
* Broke out ``internal.crypto`` into smaller, feature-oriented, modules.

Tooling
-------
* Added `tox`_ configuration to support automation and development tooling.
* Added `pylint`_, `flake8`_, and `doc8`_ configuration to enforce style rules.

Maintenance
-----------
* Updated ``internal.crypto.authentication.Verifier`` to use ``Prehashed``.
* Addressed `docstring issue 7 <https://github.com/awslabs/aws-encryption-sdk-python/issues/7>`_.
* Addressed `docstring issue 8 <https://github.com/awslabs/aws-encryption-sdk-python/issues/8>`_.
* Addressed `logging issue 10 <https://github.com/awslabs/aws-encryption-sdk-python/issues/10>`_.
* Addressed assorted linting issues to bring source, tests, examples, and docs up to configured
linting standards.

===================

Major
-----
* Added cryptographic materials managers as a concept
* Added data key caching
* Moved to deterministic IV generation

Minor
-----
* Added changelog
* Fixed attrs usage to provide consistent behavior with 16.3.0 and 17.x
* Fixed performance bug which caused KDF calculations to be performed too frequently
* Removed ``line_length`` as a configurable parameter of ``EncryptingStream`` and
``DecryptingStream`` objects to simplify class APIs after it was found in further
testing to have no measurable impact on performance
* Added deterministic length eliptic curve signature generation
* Added support for calculating ciphertext message length from header
* Migrated README from md to rst

===================
* Fixed ``attrs`` version to 16.3.0 to avoid `breaking changes in attrs 17.1.0`_