Open Stack

Related fix proposed to branch: master
Review: https://review.openstack.org/98942

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https://bugs.launchpad.net/bugs/1175904

Title:
  passlib trunc_password MAX_PASSWORD_LENGTH password truncation

Status in OpenStack Identity (Keystone):
  In Progress

Bug description:
  Grant Murphy originally reported:

  * Insecure / bad practice

     The trunc_password function attempts to correct and truncate passwords 
     that are over the MAX_PASSWORD_LENGTH value (default 4096). As the 
     MAX_PASSWORD_LENGTH field is globally mutable it could be modified 
     to restrict all passwords to length = 1. This scenario might be unlikely 
     but generally speaking we should not try to 'fix' invalid input and 
     continue on processing as if nothing happened. 

  If this is exploitable it will need a CVE, if not we should still
  harden it so it can't be monkeyed with in the future.

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