Fwd: Re: [sane-devel] HP-Backend asks for a Password (Probably a Bug)

[Peter Kirchgessner]

Hello,

coming back to your problem. I would say it is not a problem of the 
hp-backend. Because it does not handle authorization callbacks at all. 
There are some messages in sanedebug1.txt:

...
[net] sane_init: trying to add dominica
[net] add_device: adding backend dominica
[net] add_device: backend dominica added 

...
[net] sane_control_option: auth required
[net] do_authorization: dev=0x805fc30 resource=
[net] do_authorization: invoking auth_callback, resource = net:dominica:
WARNING: backend requested plain-text password
Authentification required for resource net:dominica:. Enter username: 
[net] do_authorization: relaying authentication data
...

I would assume there is a problem in the net backend.


--Peter



Konstantin Seiler wrote:

> Hi Peter!
> Here is the mail Henning replied to.
> 
> Bye,
> Konstantin
> 
> ----------  Weitergeleitete Nachricht  ----------
> 
> Subject: Re: [sane-devel] HP-Backend asks for a Password (Probably a Bug)
> Date: Tue, 23 Jul 2002 00:14:45 +0200
> From: Konstantin Seiler <list at kseiler.de>
> To: Henning Meier-Geinitz <henning at meier-geinitz.de>
> Cc: sane-devel at mostang.com
> 
> Am Montag, 22. Juli 2002 18:00 schrieben Sie:
> 
>>On Mon, Jul 22, 2002 at 05:26:02PM +0200, Konstantin Seiler wrote:
>>
>>>I set up saned with IP-based authentification without passwords and
>>>almost everything works fine. But when doing
>>>scanimage --help
>>>
>>That's on the client machine? Does "scanimage --help" on the server
>>work?
>>
> 
> As root (when I'm able to access the actual device) it querys the backend
> itself. That works fine. But as normal user on the server it querys the
> net-backend and asks for a password as well.
> 
> 
>>>After (or while) displaying help-message the backend asks for an username
>>>and password. It looks like this:
>>>
>>My first guess is that this is not really a authetication request but
>>some sort of data destruction somewhere. One hint is the segfault.
>>Does the same happen with "scanimage -d hp --help"?
>>
> 
> Like I told above when querying the backend itself it works fine.
> 
> 
>>>The Scanner is a HP C2500A, the OS is Debian woody and I'm using Sane in
>>>the released version 1.0.8.
>>>
>>On both server and client?
>>
> 
> Yes. All workstations run exactly the same version of all software. They
> reinstall themself each time they are rebooted. (Saned runs on one of
> these workstations)
> 
> 
>>To find out more about the problem, could you please send us the output
>>of
>>SANE_DEBUG_SANEI_WIRE=255 SANE_DEBUG_NET=255 scanimage --help
>>
> 
> I attached it in sanedebug1.txt.gz. the question for the password is missing.
> I wasn't able to pipe it into the file. It is right after the
> username-question
> 
> 
>>It may be worth a try to run saned on the server in debug mode:
>>Disable it in inetd (or xinetd) and start it like this:
>>SANE_DEBUG_HP=255 saned -d255
>>
> 
> You will find the output in sanedebug2.txt.gz. The segfault occures at the
> same time the client asks for the password. So the server istn's running
> anymore when I have to enter the password.
> 
> 
>>Please send the output when scanimage --help is called.
>>
> 
> You can find the complete output of scanimage --help in sanedebug3.txt.gz.
> Again without the password-question that I was unable to pipe. The
> question for an username is included.
> 
> Bye,
> Konstantin
> 
> -------------------------------------------------------
> 
> 
> 


-- 
Peter Kirchgessner
http://www.kirchgessner.net
mailto:peter at kirchgessner.net