IPP Mail Archive: Re: IPP> IPP Minutes -- Jan '01

IPP Mail Archive: Re: IPP> IPP Minutes -- Jan '01

Re: IPP> IPP Minutes -- Jan '01

From: Carl Kugler (kugler@us.ibm.com)
Date: Mon Feb 05 2001 - 12:29:36 EST

  • Next message: McDonald, Ira: "RE: IPP> URL - Improved conformance for IPP URLs - 1 Feb 2001"

    "Farrell, Lee" <lfarrell@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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