# Python-RSA changelog ## Version 4.7 - released 2021-01-10 - Fix [#165](https://github.com/sybrenstuvel/python-rsa/issues/165]: CVE-2020-25658 - Bleichenbacher-style timing oracle in PKCS#1 v1.5 decryption code - Add padding length check as described by PKCS#1 v1.5 (Fixes [#164](https://github.com/sybrenstuvel/python-rsa/issues/164)) - Reuse of blinding factors to speed up blinding operations. Fixes [#162](https://github.com/sybrenstuvel/python-rsa/issues/162). - Declare & test support for Python 3.9 ## Version 4.4 & 4.6 - released 2020-06-12 Version 4.4 and 4.6 are almost a re-tagged release of version 4.2. It requires Python 3.5+. To avoid older Python installations from trying to upgrade to RSA 4.4, this is now made explicit in the `python_requires` argument in `setup.py`. There was a mistake releasing 4.4 as "3.5+ only", which made it necessary to retag 4.4 as 4.6 as well. No functional changes compared to version 4.2. ## Version 4.3 & 4.5 - released 2020-06-12 Version 4.3 and 4.5 are almost a re-tagged release of version 4.0. It is the 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. ## Version 4.2 - released 2020-06-10 - 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). ## Version 4.1 - released 2020-06-10 - 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. ## Version 4.0 - released 2018-09-16 - 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. ## Version 3.4.2 - released 2016-03-29 - Fixed dates in CHANGELOG.txt ## Version 3.4.1 - released 2016-03-26 - Included tests/private.pem in MANIFEST.in - Included README.md and CHANGELOG.txt in MANIFEST.in ## Version 3.4 - released 2016-03-17 - Moved development to GitHub: https://github.com/sybrenstuvel/python-rsa - Solved side-channel vulnerability by implementing blinding, fixes #19 - Deprecated the VARBLOCK format and rsa.bigfile module due to security issues, see https://github.com/sybrenstuvel/python-rsa/issues/13 - Integration with Travis-CI [1], Coveralls [2] and Code Climate [3] - Deprecated the old rsa._version133 and rsa._version200 submodules, they will be completely removed in version 4.0. - Add an 'exponent' argument to key.newkeys() - Switched from Solovay-Strassen to Miller-Rabin primality testing, to comply with NIST FIPS 186-4 [4] as probabilistic primality test (Appendix C, subsection C.3): - Fixed bugs #12, #14, #27, #30, #49 [1] https://travis-ci.org/sybrenstuvel/python-rsa [2] https://coveralls.io/github/sybrenstuvel/python-rsa [3] https://codeclimate.com/github/sybrenstuvel/python-rsa [4] http://nvlpubs.nist.gov/nistpubs/FIPS/NIST.FIPS.186-4.pdf ## Version 3.3 - released 2016-01-13 - Thanks to Filippo Valsorda: Fix BB'06 attack in verify() by switching from parsing to comparison. See [1] for more information. - Simplified Tox configuration and dropped Python 3.2 support. The coverage package uses a u'' prefix, which was reintroduced in 3.3 for ease of porting. [1] https://blog.filippo.io/bleichenbacher-06-signature-forgery-in-python-rsa/ ## Version 3.2.3 - released 2015-11-05 - Added character encoding markers for Python 2.x ## Version 3.2.1 - released 2015-11-05 - Added per-file licenses - Added support for wheel packages - Made example code more consistent and up to date with Python 3.4 ## Version 3.2 - released 2015-07-29 - Mentioned support for Python 3 in setup.py ## Version 3.1.4 - released 2014-02-22 - Fixed some bugs ## Version 3.1.3 - released 2014-02-02 - Dropped support for Python 2.5 ## Version 3.1.2 - released 2013-09-15 - Added Python 3.3 to the test environment. - Removed dependency on Distribute - Added support for loading public keys from OpenSSL ## Version 3.1.1 - released 2012-06-18 - Fixed doctests for Python 2.7 - Removed obsolete unittest so all tests run fine on Python 3.2 ## Version 3.1 - released 2012-06-17 - Big, big credits to Yesudeep Mangalapilly for all the changes listed below! - Added ability to generate keys on multiple cores simultaneously. - Massive speedup - Partial Python 3.2 compatibility (core functionality works, but saving or loading keys doesn't, for that the pyasn1 package needs to be ported to Python 3 first) - Lots of bug fixes ## Version 3.0.1 - released 2011-08-07 - Removed unused import of abc module ## Version 3.0 - released 2011-08-05 - Changed the meaning of the keysize to mean the size of ``n`` rather than the size of both ``p`` and ``q``. This is the common interpretation of RSA keysize. To get the old behaviour, double the keysize when generating a new key. - Added a lot of doctests - Added random-padded encryption and decryption using PKCS#1 version 1.5 - Added hash-based signatures and verification using PKCS#1v1.5 - Modeling private and public key as real objects rather than dicts. - Support for saving and loading keys as PEM and DER files. - Ability to extract a public key from a private key (PEM+DER) ## Version 2.0 - Security improvements by Barry Mead.