ChangeLog

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* tls: Add support for session caching.

[1.6.0] - 2021-10-03

* tls: Fix arguments of TLSWrappedSocket.sendto() method.
* *: Add MacOS support and tests on GitHub.
* *: Add Windows support and tests on GitHub.
* *: Remove Travis-CI job: The main CI is moved to GitHub
Actions because of the less FOSS-friendly policy by Travis CI.
* *: Implement the pickling protocol (PEP 307).
RingBuffer, ciphers, TLSConfiguration and DTLSConfiguration,
and x509 certificates are copyable.  The other Cython classes
are non-copyable.
* tls: Fix missing DTLS-only parameters in DTLSConfiguration
`__repr__()` and `__eq__()`.  Equality, especially, could
have returned True for two configuration differing only on
some parameters.
* tls: Fix handling of min and max handshake timeout
when set independently.
* tls: Fix exception raised when unwrapping a
`TLSWrappedSocket` before opening it.
* tls: Augment size of the accept buffer for DTLS (nicho2).
* Update wheels to mbedtls 2.16.11.

[1.5.1] - 2020-12-30

* doc: Do not document Python 2.7-3.5 as documented ;p

[1.5.0] - 2020-12-30

* ci: Drop Python < 3.6.
* hashlib: Drop hash alias to hashlib.
* cipher,tls,x509: Unsupported ciphers now consistently
raise NotImplementedError.
* upstream: The size of the IV in ECB mode is consistently 0.
* Update wheels to mbedtls 2.16.9.
* cython: Get rid of compilation warnings.

[1.4.1] - 2020-11-30

* *: The '*.pyx' files were missing from the archive
on pypi.

[1.4.0] - 2020-10-17

* tls: Add accessors to min/max timeout DTLS handshake.
* ci: Support Python 3.9 final.
* ci: update wheels to mbedtls 2.16.8.
* ci: Prepare experimental support for Python 3.10.

[1.3.1] - 2020-07-23

* *: Add support for Python 3.9.
* update wheels to mbedtls 2.16.7.

[1.3.0] - 2020-06-04

* hash -> hashlib: Importing from `hash` is now deprecated.
Import from `mbedtls.hashlib` now instead.
* tls: fix bug (typo) in `tls.recvfrom_into()` that would make
the method crash.

[1.2.1]

* update wheels to mbedtls 2.16.6

[1.2.0] - 2020-03-10

* ci: Partial support to Python 3.9
* ci: Upgrade manylinux from 1 to 2010.
* *: Drop Python 3.4

[1.1.0] - 2020-02-22

* tls: Add support to PSK for (D)TLS
* tls: Fixup `access()` method for DTLS on Python 2.7 and 3.4.
* tls: Ensure that the `ciphers` parameter is a tuple and let
`ciphers` accessors return tuples.
* update wheels to mbedtls 2.16.5

[1.0.0] - 2020-01-05

* ci: Add support to Python 3.8.
* md: Support MD2 and MD4 algo.
* ci: Update dependencies.

[0.18.3]

* setup.py: Refuse to build if mbedtls is too old.

[0.18.2]

* cipher: Increase test coverage and fix minor bugs.
* tests: Do not assume that havege is missing as it could be included
in some configurations.
* tests: Make error reporting with memoryviews closer to pytest
reporting for bytes.

[0.18.1]

* update wheels with 2.16.3.
* version: Make `has_feature()` public.
* tests: Skip tests to features that are not compiled in.
* tests: Improve error reporting with memoryviews.

[0.18.0] - 2019-05-11

* secrets: Add PEP-506 conform secrets module for generating secrets.
* cipher/hash/hmac: These modules and packages are now pure-Python.
* mpi: Add bitwise operations.

API Changes

* pk.ECDHNaive: `generate()` returns the public key as an ECPoint and
`import_peers_public()` now takes an ECPoint.  `import_peer_public(MPI)`
is deprecated and will be removed in a future release.  Further note
the `s` in `import_peers_public()`.
* pk: Make `ECDH*.{public_key,private_key,peers_public_key}` public.  The
private equivalents with a `_*` prefix are deprecated and will be removed in a
future release.  Further note the `s` in `peers_public_key`.
* _random: Privatize `Entropy` and refactor `Random` class.

Bugfixes

* mpi: Fix bug in `mpi.to_bytes()`.

Misc.

* *: Format Python files with `black`
* ci: Check that the docs build in CI.
* ci: Repair test coverage measurements on coveralls.
* mpi: Simplify code for comparisons.
* mpi: Add tests and better exceptions for `__pow__()`.


[0.17.1] - 2019-04-16

This is a bugfix release fixing several TLS issues.

Misc.

* Split download and install scripts.

Bugfixes

* tls: Split input and output buffers for TLS/TCP.
* tls: Fixes issue with TLSv1 by reading greedily from the buffer.


[0.17.0] - 2019-04-12

* Add support to HKDF (HMAC key derivation function).

Misc.

* Change branching model to fast-forward merge on the master branch.
* Change directive `language_level` from 2 to 3 for Cython.

Bugfixes

* *: Fixup handling of empty and `None` buffers (#20: Roman (inpos)).
* hmac: Hmac now accepts the empty key (b"").


[0.16.0] - 2019-04-04

Add Chacha20/Poly1305 support (Stephen.Y).

* cipher: Add support for the ARIA family.
* cipher: Add OFB, XFB, and CHACHA/POLY modes and support for
AEAD ciphers (Stephen.Y).
* Update wheels with mbedtls 2.16.1.

[0.15.0] - 2019-03-15

Add DTLS support.  Both client side and server side are implemented.
Setting the cookie on the server side is *not* optional in `python-mbedtls`.

* pk: Add support for curves 448 and 25519 (Stephen.Y).

Misc.

* Update wheels with mbedtls 2.14.1.
* version: Add accessors to the version of mbed TLS in use.
* tls: Allow configuration of libmbedtls debug level.

[0.14.1] - 2019-01-10

Update wheels with mbedtls 2.7.9.

[0.14.0] - 2019-01-08

* Build and test on `manylinux1` (PEP 513) to distribute linux
wheels with Mbed TLS.  It is not necessary anymore to install
mbed TLS separately.
* x509/CRL: Add support for upstream Mbed TLS version 2.7.2 and above.
Note that this did not require changes in the library but only
in the tests.
* The library now internally uses a single global `Random` instance.
This instance is not accessible from Python.
* pk/DHServer, pk/DHClient: Increase test entropy to avoid
flakey tests.

API Changes

* random: `Random()` now takes an optional `entropy` object
as argument.
* random: `Random.reseed()` now takes optional data that can be used
to increase entropy.

Bugfixes

* mpi: Let MPI built from an empty byte (b"") be 0 as regular ints.

[0.13.0] - 2018-10-25

Add TLS support.  Both client side and server side are implemented.
SSLv3 is not supported.  Session management and SNI callbacks are
not implemented.

API Changes

* x509: `ca` and `max_path_length` basic constraints are now
grouped into a `BasicConstraints` namedtuple.  It is possible
to leave the basic constraints unset by passing None
to `CRT.new(..., basic_constraints=None)`.
* random: `random` module renamed `_random`.

Bugfixes

* mpi: GC now actually overwrites keys with random data.

Misc.

* pk: Improved error handling.
* Declare mbedtls functions nogil.
* The install script uses cmake to install mbedtls.

[0.12.2] - 2018-09-10

Misc.

* New `property` syntax from Cython 0.24.
* Fixup rendering on Pypi.
* Update required deps.

[0.12.1] - 2018-08-27

Update version in `setup.py`.  No change in the code.

[0.12.0] - 2018-08-27

* x509: Add accessors to most fields of CRT, CSR, and CRL.
The `x509` module can now be used to inspect existing certificates.
* x509: The module now offers basic signing and
verification capabilities.

API Changes

* pk: `from_{PEM,DER,buffer}` are now `classmethod`s to
comply with PEP 543.
* x509: `Certificate` class renamed `CRT`.
* x509: `start` and `end` arguments renamed `not_before` and
`not_after`; `md_alg` argument is now `digestmod`.
* x509: Re-order the arguments of the `new()` methods.
* exceptions: Rename `MbedTLSError` -> `TLSError` to comply
with PEP 543.

Misc

* pk: `__eq__()` now also accepts DER (bytes) or PEM (str) formats.
* x509: `__bytes__()` returns the certificates in the DER format.
* x509: `__str__()` now returns a human-readable string.


[0.11.1] - 2018-07-04

Update changelog.  No changes in the code.


[0.11.0] - 2018-07-01

* Support Diffie-Hellman-Merkle key exchange.
* MPIs (multi-precision integers) now implement the full
`numbers.Integral` API.
* MPIs are erased from memory upon garbage collection.
* The `mpi` library is now public (renamed `_mpi` -> `mpi`).

API Changes

* pk: Methods that were previously returning a long integer now
return an MPI.
* exceptions: Rename `_ErrorBase` -> `MbedTLSError`.  It is now
the only new exception.
* exceptions: `mbedtls_strerror()` generates the error message.


[0.10.0] - 2018-05-07

Support elliptic curve cryptography

* pk/ECC: Elliptic curve digital signature algorithm.
* pk/ECDHServer, pk/ECDHClient: Elliptic curve Diffie-Hellman.
The two classes together support ECDHE (ephemeral) as well.

API Changes

* pk/RSA: generate() returns the private key.
* pk/RSA: to_DER() and to_PEM() are obsolete and will be removed.
Users should call export_key() and export_public_key() instead.
* pk/RSA: has_public() and has_private() are now private.
Test if export_key() and export_public_key() are truthy
or falsy instead.
* pk/RSA: __str__() now returns the private key in PEM format.
* pk/RSA: to_bytes() and __bytes__() now return the private key
in DER format.

Bugfix

* pk: Increase the size of the buffer for sign, encrypt, decrypt

Misc.

* Use const memoryviews supported by Cython 0.28.0.
* pk: pk is now a module instead of a package.

[0.9.0] - 2018-03-14

Misc.

* Switch to semantic versioning.
* Add pxd files to source distribution.


[0.9] - 2018-03-13

API Changes

* x509/Certificate: next() returns the next certificate in a chain.
* md: Implement block_size property.

Misc.

* Clean up imports.
* Fix tests and packaging.
* Change git merge policy to fast-forward on develop.


[0.8 withdrawn] - 2018-02-24

Support X.509 Certificates

* x509/Certificate: X.509 certificate writer and parser.
* x509/CSR: X.509 certificate signing request writer and parser.
* x509/CRL: X.509 certificate revocation list and validation.

API Changes

* CipherBase/RSA: import_() method renamed from_buffer() for PEP 543.
* CipherBase/RSA: export(format="PEM") method renamed to_PEM()
* CipherBase/RSA: export(format="DER") method renamed to_DER()
* CipherBase/RSA: from_DER(), from_PEM() to import from DER or PEM.
* CipherBase/RSA: to_bytes() alias to_DER()


[0.7] - 2018-02-04

* Add support for Python 2.7, 3.5, and 3.6.
* Tests ported from nosetest to pytest.
* Setup continuous integration.