rsa

• 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).

Bumped version to 4.7.2

• Fix threading issue introduced in 4.7 (#173)

• 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 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.

Mark Python 2.7 in Pipfile, as this is a release specifically for Py 27

• 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.

• 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.

• 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.

• Fixed dates in CHANGELOG.txt

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

• 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

• 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/

• Added character encoding markers for Python 2.x

• Added per-file licenses
• Added support for wheel packages
• Made example code more consistent and up to date with Python 3.4

• Mentioned support for Python 3 in setup.py

• Fixed some bugs

• Dropped support for Python 2.5

• Added Python 3.3 to the test environment.
• Removed dependency on Distribute
• Added support for loading public keys from OpenSSL

• Fixed doctests for Python 2.7
• Removed obsolete unittest so all tests run fine on Python 3.2

• 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

• Removed unused import of abc module

• 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)

• Security improvements by Barry Mead.