argon2-cffi: Argon2 for Python

Argon2 won the Password Hashing Competition and argon2-cffi is the simplest way to use it in Python:

>>> from argon2 import PasswordHasher
>>> ph = PasswordHasher()
>>> hash = ph.hash("correct horse battery staple")
>>> hash  # doctest: +SKIP
'$argon2id$v=19$m=65536,t=3,p=4$MIIRqgvgQbgj220jfp0MPA$YfwJSVjtjSU0zzV/P3S9nnQ/USre2wvJMjfCIjrTQbg'
>>> ph.verify(hash, "correct horse battery staple")
True
>>> ph.check_needs_rehash(hash)
False
>>> ph.verify(hash, "Tr0ub4dor&3")
Traceback (most recent call last):
  ...
argon2.exceptions.VerifyMismatchError: The password does not match the supplied hash

Project Links

• PyPI
• GitHub
• Documentation
• Changelog
• Funding
• The low-level Argon2 CFFI bindings are maintained in the separate argon2-cffi-bindings project.

Release Information

Added

• Official support for Python 3.13 and 3.14. No code changes were necessary.

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

• Improved parameter compatibility handling for Pyodide / WebAssembly environments. #190

Full Changelog →

Credits

argon2-cffi is maintained by Hynek Schlawack.

The development is kindly supported by my employer Variomedia AG, argon2-cffi Tidelift subscribers, and my amazing GitHub Sponsors.

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