#27604: Use set_signed_cookie for contrib.messages Cookie storage
-------------------------------------+-------------------------------------
     Reporter:  Anthony King         |                    Owner:  Craig
         Type:                       |  Anderson
  Cleanup/optimization               |                   Status:  assigned
    Component:  contrib.messages     |                  Version:  master
     Severity:  Normal               |               Resolution:
     Keywords:                       |             Triage Stage:  Accepted
    Has patch:  0                    |      Needs documentation:  0
  Needs tests:  0                    |  Patch needs improvement:  0
Easy pickings:  0                    |                    UI/UX:  0
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Comment (by Craig Anderson):

 What should happen to cookies signed with the existing hashing method?

 I haven't tested this (yet), but it looks like messages stored with the
 old hashing method will be silently ignored.

 We could:
 1. accept that messages from Django < 2.3 (?) are ignored;
 2. add the existing `_hash` implementation into `_decode` for these legacy
 messages; or
 3. just close this ticket.

 I'll go ahead and implement option 2 as it's the safest.

 However, as I've never left messages in storage for more than one or two
 request-response cycles, option 1 strikes me as reasonable and much
 cleaner.

-- 
Ticket URL: <https://code.djangoproject.com/ticket/27604#comment:6>
Django <https://code.djangoproject.com/>
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