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Python-RSA changelog

Version 4.10 - in development

  • Drop support for Python 3.6 (#209) and declare support for 3.11 (#208).
  • Upgrade pytest dependency to fix a security issue.
  • Upgrade pytest-cov as well, for good measure.
  • Upgrade MyPy (#211).

Version 4.9 - release 2022-07-20

  • Remove debug logging from rsa/key.py (#194).
  • Remove overlapping slots in PrivateKey and PublicKey. (#189).
  • Do not include CHANGELOG/LICENSE/README.md in wheel (#191).
  • Fixed Key Generation Unittest: Public and Private keys are assigned the wrong way around (#188).

Version 4.8 - released 2021-11-24

  • Switch to Poetry for dependency and release management.
  • Compatibility with Python 3.10.
  • Chain exceptions using raise new_exception from old_exception (#157)
  • Added marker file for PEP 561. This will allow type checking tools in dependent projects to use type annotations from Python-RSA (#136).
  • Use the Chinese Remainder Theorem when decrypting with a private key. This makes decryption 2-4x faster (#163).

Version 4.7.2 - released 2021-02-24

  • Fix picking/unpickling issue introduced in 4.7 (#173)

Version 4.7.1 - released 2021-02-15

  • Fix threading issue introduced in 4.7 (#173)

Version 4.7 - released 2021-01-10

  • Fix #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)
  • Reuse of blinding factors to speed up blinding operations. Fixes #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
  • 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.

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.
  • Fix #129 Installing from source gives UnicodeDecodeError.
  • Switched to using Poetry 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
  • 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
  • Add support for SHA-224 for PKCS1 signatures. #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 #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.