Rsa

last to support Python 2.7. This is now made explicit in the `python_requires`
argument in `setup.py`. Python 3.4 is not supported by this release. There was a
mistake releasing 4.4 as "3.5+ only", which made it necessary to retag 4.3 as
4.5 as well.

Two security fixes have also been backported, so 4.3 = 4.0 + these two fixes.

- Choose blinding factor relatively prime to N. Thanks Christian Heimes for pointing this out.
- Reject cyphertexts (when decrypting) and signatures (when verifying) that have
been modified by prepending zero bytes. This resolves CVE-2020-13757. Thanks
Carnil for pointing this out.

- Rolled back the switch to Poetry, and reverted back to using Pipenv + setup.py
for dependency management. There apparently is an issue no-binary installs of
packages build with Poetry. This fixes
[148](https://github.com/sybrenstuvel/python-rsa/issues/148)
- Limited SHA3 support to those Python versions (3.6+) that support it natively.
The third-party library that adds support for this to Python 3.5 is a binary
package, and thus breaks the pure-Python nature of Python-RSA.
This should fix [147](https://github.com/sybrenstuvel/python-rsa/issues/147).

- Added support for Python 3.8.
- Dropped support for Python 2 and 3.4.
- Added type annotations to the source code. This will make Python-RSA easier to use in
your IDE, and allows better type checking.
- Added static type checking via [MyPy](http://mypy-lang.org/).
- Fix [129](https://github.com/sybrenstuvel/python-rsa/issues/129) Installing from source
gives UnicodeDecodeError.
- Switched to using [Poetry](https://poetry.eustace.io/) for package
management.
- Added support for SHA3 hashing: SHA3-256, SHA3-384, SHA3-512. This
is natively supported by Python 3.6+ and supported via a third-party
library on Python 3.5.
- Choose blinding factor relatively prime to N. Thanks Christian Heimes for pointing this out.
- Reject cyphertexts (when decrypting) and signatures (when verifying) that have
been modified by prepending zero bytes. This resolves CVE-2020-13757. Thanks
Adelapie for pointing this out.

- Removed deprecated modules:
- rsa.varblock
- rsa.bigfile
- rsa._version133
- rsa._version200
- Removed CLI commands that use the VARBLOCK/bigfile format.
- Ensured that PublicKey.save_pkcs1() and PrivateKey.save_pkcs1() always return bytes.
- Dropped support for Python 2.6 and 3.3.
- Dropped support for Psyco.
- Miller-Rabin iterations determined by bitsize of key.
[58](https://github.com/sybrenstuvel/python-rsa/pull/58)
- Added function `rsa.find_signature_hash()` to return the name of the hashing
algorithm used to sign a message. `rsa.verify()` now also returns that name,
instead of always returning `True`.
[78](https://github.com/sybrenstuvel/python-rsa/issues/13)
- Add support for SHA-224 for PKCS1 signatures.
[104](https://github.com/sybrenstuvel/python-rsa/pull/104)
- Transitioned from `requirements.txt` to Pipenv for package management.

- Fixed dates in CHANGELOG.txt

- Included tests/private.pem in MANIFEST.in
- Included README.md and CHANGELOG.txt in MANIFEST.in