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Changelog

All notable changes to this project will be documented in this file.

The format is based on Keep a Changelog and this project adheres to Calendar Versioning.

The first number of the version is the year. The second number is incremented with each release, starting at 1 for each year. The third number is when we need to start branches for older releases (only for emergencies).

You can find our backwards-compatibility policy here.

Unreleased

Removed

  • Python 3.7 is not supported anymore. #186

Changed

  • argon2.PasswordHasher.check_needs_rehash() now also accepts bytes like the rest of the API. #174

23.1.0 - 2023-08-15

Removed

  • Python 3.6 is not supported anymore.

Deprecated

  • The InvalidHash exception is deprecated in favor of InvalidHashError. No plans for removal currently exist and the names can (but shouldn't) be used interchangeably.

  • argon2.hash_password(), argon2.hash_password_raw(), and argon2.verify_password() that have been soft-deprecated since 2016 are now hard-deprecated. They now raise DeprecationWarnings and will be removed in 2024.

Added

  • Official support for Python 3.11 and 3.12. No code changes were necessary.

  • argon2.exceptions.InvalidHashError as a replacement for InvalidHash.

  • salt parameter to argon2.PasswordHasher.hash() to allow for custom salts. This is only useful for specialized use-cases -- leave it on None unless you know exactly what you are doing. #153

21.3.0 - 2021-12-11

Fixed

  • While the last release added type hints, the fact that it's been missing a py.typed file made Mypy ignore them. #113

21.2.0 - 2021-12-08

Removed

  • Python 3.5 is not supported anymore.

  • The CFFI bindings have been extracted into a separate project: argon2-cffi-bindings This makes argon2-cffi a Python-only project und should make it easier to contribute to and have more frequent releases with high-level features.

    This change is breaking for users who want to use a system-wide installation of Argon2 instead of our vendored code, because the argument to the --no-binary argument changed. Please refer to the installation guide.

Added

  • Thanks to lots of work within argon2-cffi-bindings, there're pre-compiled wheels for many new platforms. Including:

    • Apple Silicon via universal2
    • Linux on amd64 and arm64
    • musl libc (Alpine Linux!) on i686, amd64, and arm64
    • PyPy 3.8

    We hope to provide wheels for Windows on arm64 soon, but are waiting for GitHub Actions to support that.

  • argon2.Parameters.from_parameters() together with the argon2.profiles module that offers easy access to the RFC-recommended configuration parameters and then some. #101 #110

  • The CLI interface now has a --profile option that takes any name from argon2.profiles.

  • Types! argon2-cffi is now fully typed. #112

Changed

  • argon2.PasswordHasher now uses the RFC 9106 low-memory profile by default. The old defaults are available as argon2.profiles.PRE_21_2.

21.1.0 - 2021-08-29

Vendoring Argon2 @ 62358ba (20190702)

Removed

  • Microsoft stopped providing the necessary SDKs to ship Python 2.7 wheels and currently the downloads amount to 0.09%. Therefore we have decided that Python 2.7 is not supported anymore.

Changed

  • There are indeed no changes whatsoever to the code of argon2-cffi. The Argon2 project also hasn't tagged a new release since July 2019. There also don't seem to be any important pending fixes.

    This release is mainly about improving the way binary wheels are built (abi3 on all platforms).

20.1.0 - 2020-05-11

Vendoring Argon2 @ 62358ba (20190702)

Added

  • It is now possible to manually override the detection of SSE2 using the ARGON2_CFFI_USE_SSE2 environment variable.

19.2.0 - 2019-10-27

Vendoring Argon2 @ 62358ba (20190702)

Removed

  • Python 3.4 is not supported anymore. It has been unsupported by the Python core team for a while now and its PyPI downloads are negligible.

    It's very unlikely that argon2-cffi will break under 3.4 anytime soon, but we don't test it and don't ship binary wheels for it anymore.

Fixed

  • The dependency on enum34 is now protected using a PEP 508 marker. This fixes problems when the sdist is handled by a different interpreter version than the one running it. #48

19.1.0 - 2019-01-17

Vendoring Argon2 @ 670229c (20171227)

Added

  • Added support for Argon2 v1.2 hashes in argon2.extract_parameters().

18.3.0 - 2018-08-19

Vendoring Argon2 @ 670229c (20171227)

Added

  • argon2.PasswordHasher's hash type is configurable now.

18.2.0 - 2018-08-19

Vendoring Argon2 @ 670229c (20171227)

Changed

  • The hash type for argon2.PasswordHasher is Argon2id now.

    This decision has been made based on the recommendations in the latest Argon2 RFC draft. #33 #34

  • Some of the hash parameters have been made stricter to be closer to said recommendations. The current goal for a hash verification times is around 50ms. #41

Added

  • To make the change of hash type backward compatible, argon2.PasswordHasher.verify() now determines the type of the hash and verifies it accordingly.

  • To allow for bespoke decisions about upgrading Argon2 parameters, it's now possible to extract them from a hash via the argon2.extract_parameters() function. #41

  • Additionally argon2.PasswordHasher now has a check_needs_rehash() method that allows to verify whether a hash has been created with the instance's parameters or whether it should be rehashed. #41

18.1.0 - 2018-01-06

Vendoring Argon2 @ 670229c (20171227)

Added

  • It is now possible to use the argon2-cffi bindings against an Argon2 library that is provided by the system.

16.3.0 - 2016-11-10

Vendoring Argon2 @ 1c4fc41f81f358283755eea88d4ecd05e43b7fd3 (20161029)

Added

  • Add low-level bindings for Argon2id functions.

Fixed

  • Prevent side-effects like the installation of cffi if setup.py is called with a command that doesn't require it. #20
  • Fix a bunch of warnings with new cffi versions and Python 3.6. #14 #16

16.2.0 - 2016-09-10

Vendoring Argon2 @ 4844d2fee15d44cb19296ddf36029326d17c5aa3

Fixed

  • Fixed compilation on Debian 8 (Jessie). #13

16.1.0 - 2016-04-19

Vendoring Argon2 @ 00aaa6604501fade85853a4b2f5695611ff6e7c5.

Added

  • Add VerifyMismatchError that is raised if verification fails only because of a password/hash mismatch. It's a subclass of VerificationError therefore this change is completely backwards-compatible.

Changed

  • Add support for Argon2 1.3. Old hashes remain functional but opportunistic rehashing is strongly recommended.

Removed

  • Python 3.3 and 2.6 aren't supported anymore. They may work by chance but any support to them has been ceased.

    The last Python 2.6 release was on October 29, 2013 and isn't supported by the CPython core team anymore. Major Python packages like Django and Twisted dropped Python 2.6 a while ago already.

    Python 3.3 never had a significant user base and wasn't part of any distribution's LTS release.

16.0.0 - 2016-01-02

Vendoring Argon2 @ 421dafd2a8af5cbb215e16da5953663eb101d139.

Deprecated

  • hash_password(), hash_password_raw(), and verify_password() should not be used anymore. For hashing passwords, use the new argon2.PasswordHasher. If you want to implement your own higher-level abstractions, use the new low-level APIs hash_secret(), hash_secret_raw(), and verify_secret() from the argon2.low_level module. If you want to go really low-level, core() is for you. The old functions will not raise any warnings though and there are no immediate plans to remove them.

Added

  • Added argon2.PasswordHasher. A higher-level class specifically for hashing passwords that also works on Unicode strings.
  • Added argon2.low_level module with low-level API bindings for building own high-level abstractions.

15.0.1 - 2015-12-18

Vendoring Argon2 @ 4fe0d8cda37691228dd5a96a310be57369403a4b.

Fixed

  • Fix long_description on PyPI.

15.0.0 - 2015-12-18

Vendoring Argon2 @ 4fe0d8cda37691228dd5a96a310be57369403a4b.

Added

  • Conditionally use the SSE2-optimized version of argon2 on x86 architectures.

Changed

  • verify_password() doesn't guess the hash type if passed None anymore. Supporting this resulted in measurable overhead (~0.6ms vs 0.8ms on my notebook) since it had to happen in Python. That means that naïve usage of the API would give attackers an edge. The new behavior is that it has the same default value as hash_password() such that verify_password(hash_password(b"password"), b"password") still works.
  • Tweaked default parameters to more reasonable values. Verification should take between 0.5ms and 1ms on recent-ish hardware.

Fixed

  • More packaging fixes. Most notably compilation on Visual Studio 2010 for Python 3.3 and 3.4.

15.0.0b5 - 2015-12-10

Vendoring Argon2 @ 4fe0d8cda37691228dd5a96a310be57369403a4b.

Added

  • Initial work. Previous betas were only for fixing Windows packaging. The authors of Argon2 were kind enough to help me to get it building under Visual Studio 2008 that we’re forced to use for Python 2.7 on Windows.