The secure Argon2 password hashing algorithm.
Argon2 won the Password Hashing Competition and argon2-cffi is the simplest way to use it in Python and PyPy:
>>> 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
argon2-cffi is available from PyPI, the documentation lives at Read the Docs, the code on GitHub. The low-level Argon2 CFFI bindings are maintained in the separate project argon2-cffi-bindings.
It targets Python 3.6 and newer, and PyPy3. The last version that works with Python 2.7 is 20.1.0, and the last version that works with Python 3.5 is 21.1.0.
argon2-cffi implements Argon2 version 1.3, as described in Argon2: the memory-hard function for password hashing and other applications.
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