Reviewed:  https://reviews.mahara.org/843
Committed: 
http://gitorious.org/mahara/mahara/commit/c7a0ed9a19097fa7154b446a4415d02f34015a42
Submitter: Hugh Davenport (h...@catalyst.net.nz)
Branch:    master

commit c7a0ed9a19097fa7154b446a4415d02f34015a42
Author: Francois Marier <franc...@catalyst.net.nz>
Date:   Fri Nov 11 15:03:18 2011 +1300

    Add admin warning for entropy_length (bug #888424)
    
    This is based on an OWASP recommendation and corresponds to 128
    bits of entropy.
    
    
https://www.owasp.org/index.php/Session_Management_Cheat_Sheet#Session_ID_Properties
    
    Change-Id: Ie47779d586c39bc339728e4772467407fac90ee4
    Signed-off-by: Francois Marier <franc...@catalyst.net.nz>

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https://bugs.launchpad.net/bugs/888424

Title:
  Warn admins if session.entropy_length is < 16

Status in Mahara ePortfolio:
  In Progress

Bug description:
  The session.entropy_length variable in php.ini controls how much
  entropy is used when generating session keys:

    http://nz.php.net/manual/en/session.configuration.php#ini.session
  .entropy-length

  OWASP recommends that session keys contain at least 128 bits (16
  bytes) of entropy so we should print a warning on the admin page to
  let admins know that they should set this variable to a larger number
  (it unfortunately defaults to 0).

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