The use of a non-standard algorithm is dangerous because a determined attacker may be able to break the algorithm and compromise whatever data has been protected. Standard algorithms like ``++Argon2PasswordHasher++``, ``++BCryptPasswordHasher++``, ... should be used instead.


This rule tracks creation of ``++BasePasswordHasher++`` subclasses for Django applications.

include::../recommended.adoc[]

== Sensitive Code Example

----
class CustomPasswordHasher(BasePasswordHasher):  # Sensitive
    # ...
----

== See

* https://owasp.org/Top10/A02_2021-Cryptographic_Failures/[OWASP Top 10 2021 Category A2] - Cryptographic Failures
* https://www.owasp.org/www-project-top-ten/2017/A3_2017-Sensitive_Data_Exposure[OWASP Top 10 2017 Category A3] - Sensitive Data Exposure
* https://cwe.mitre.org/data/definitions/327[MITRE, CWE-327] - Use of a Broken or Risky Cryptographic Algorithm
* https://www.sans.org/top25-software-errors/#cat3[SANS Top 25] - Porous Defenses
ifdef::env-github,rspecator-view[]

'''
== Implementation Specification
(visible only on this page)

include::../message.adoc[]

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