IPP> IPP Minutes -- Jan '01

IPP> IPP Minutes -- Jan '01

Carl Kugler kugler at us.ibm.com
Mon Feb 5 12:29:36 EST 2001


"Farrell, Lee" <lfarrell at c...> wrote:
> It was noted that a Validate Job command will successfully generate a
challenge regardless of how the HTTP security might be implemented.

But don't forget that the 'nonce' value from the challenge may be good for
only one use (according to the Digest Auth standard).  So, if you rely on
Validate-Job exclusively, you have to make a lot of round trips to reliably
print a job from a one-shot client (one that can't back up and regenerate
the document data  from the beginning once it has started sending):

   Send a Validate-Job to provoke a challenge
   Send another Validate-Job with the authentication-info to see if the
   Print-Job request will be accepted
   Send a third Validate-Job to get a fresh nonce
   Finally, send your Print-Job.


     -Carl





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