[Bug 879625] Re: CUPS fails to request authentication when printing over IPP w/ TLS

[Duck Tayp]

I seem to have the same problem:
I'm trying to print from an ubuntu machine (11.10) to a windows IPP server with authentication (IPP over http, without encryption). The client never asks for authentication details and printing fails. Running wireshark shows the print server returns an "HTTP 401 Unauthorized" response with a "WWW-Authenticate:"  header that the client appears to ignore.

I tried printing (and setting up the printer) under unity and kubuntu --
both showed the same symptoms.

Compiling CUPS 1.5.0 with the patch above didn't help, but manually
downgrading to 1.4.6 (from natty) did solve this problem (at least to
the extent that the client asks for a username/password and successfully
sends data to the print server).

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Title:
  CUPS fails to request authentication when printing over IPP w/ TLS

Status in “cups” package in Ubuntu:
  Incomplete

Bug description:
  We have a CUPS server configured to allow printing over IPP w/ TLS.
  Printing requires the user to authenticate using basic authentication.

  When printers are set up in Ubuntu 11.04 and lower, the user is
  prompted to enter their username and password when they attempt to
  print.

  However, on upgrading to 11.04 (or doing a fresh install), the user no
  longer gets a prompt and the job does not go through.

  The error logs show some TLS errors, however printing proceeds
  normally if authentication is removed.

  Here is a relevant chunk from the error_log on the server (running
  1.4.3, but this was tested and duplicated on an ubuntu 11.10 server):

  D [20/Oct/2011:16:00:14 -0400] Report: clients=2
  D [20/Oct/2011:16:00:14 -0400] Report: jobs=6
  D [20/Oct/2011:16:00:14 -0400] Report: jobs-active=0
  D [20/Oct/2011:16:00:14 -0400] Report: printers=5
  D [20/Oct/2011:16:00:14 -0400] Report: printers-implicit=0
  D [20/Oct/2011:16:00:14 -0400] Report: stringpool-string-count=1029
  D [20/Oct/2011:16:00:14 -0400] Report: stringpool-alloc-bytes=8408
  D [20/Oct/2011:16:00:14 -0400] Report: stringpool-total-bytes=22432
  D [20/Oct/2011:16:00:14 -0400] cupsdReadClient: 11 POST /printers/Xerox_Color HTTP/1.1
  D [20/Oct/2011:16:00:14 -0400] cupsdSetBusyState: Active clients
  D [20/Oct/2011:16:00:14 -0400] cupsdAuthorize: No authentication data provided.
  D [20/Oct/2011:16:00:14 -0400] cupsdIsAuthorized: username=""
  D [20/Oct/2011:16:00:14 -0400] cupsdCloseClient: 11
  D [20/Oct/2011:16:00:14 -0400] cupsdSetBusyState: Not busy
  D [20/Oct/2011:16:00:14 -0400] cupsdAcceptClient: skipping getpeercon()
  D [20/Oct/2011:16:00:14 -0400] cupsdAcceptClient: 11 from XXX.XXX.XXX.107:631 (IPv4)
  D [20/Oct/2011:16:00:14 -0400] cupsdReadClient: 11 OPTIONS * HTTP/1.1
  D [20/Oct/2011:16:00:14 -0400] cupsdSetBusyState: Active clients
  D [20/Oct/2011:16:00:14 -0400] cupsdAuthorize: No authentication data provided.
  E [20/Oct/2011:16:00:14 -0400] Unable to encrypt connection from XXX.XXX.XXX.107 - A TLS packet with unexpected length was received.
  D [20/Oct/2011:16:00:14 -0400] cupsdCloseClient: 11

  ProblemType: Bug
  DistroRelease: Ubuntu 11.10
  Package: cups 1.5.0-8ubuntu2
  ProcVersionSignature: Ubuntu 3.0.0-12.20-generic 3.0.4
  Uname: Linux 3.0.0-12-generic i686
  ApportVersion: 1.23-0ubuntu3
  Architecture: i386
  Date: Fri Oct 21 15:18:47 2011
  EcryptfsInUse: Yes
  InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release i386 (20091028.5)
  MachineType: Hewlett-Packard HP Compaq dc7900 Convertible Minitower
  Papersize: letter
  PpdFiles:
   McGill_Color: Xerox WorkCentre 7655, 2.6.0
   TEST_BURNSIDE1B28_5735_DP: Xerox WorkCentre 5655
   SMB_MCGILL_COLOR: Xerox WorkCentre 7655, 2.6.0
   McGill_Color-ks-dev: Xerox WorkCentre 7655, 2.6.0
   McGill_Mono: Xerox WorkCentre 5655
  ProcEnviron:
   PATH=(custom, user)
   LANG=en_CA.UTF-8
   SHELL=/bin/bash
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.0.0-12-generic root=UUID=4bbca573-e47d-4d26-88a7-fd4eac5d4167 ro quiet splash vt.handoff=7
  SourcePackage: cups
  UpgradeStatus: Upgraded to oneiric on 2011-10-18 (3 days ago)
  dmi.bios.date: 03/05/2009
  dmi.bios.vendor: Hewlett-Packard
  dmi.bios.version: 786G1 v01.16
  dmi.board.asset.tag: CAC91402JW
  dmi.board.name: 3032h
  dmi.board.vendor: Hewlett-Packard
  dmi.chassis.asset.tag: CAC91402JW
  dmi.chassis.type: 6
  dmi.chassis.vendor: Hewlett-Packard
  dmi.modalias: dmi:bvnHewlett-Packard:bvr786G1v01.16:bd03/05/2009:svnHewlett-Packard:pnHPCompaqdc7900ConvertibleMinitower:pvr:rvnHewlett-Packard:rn3032h:rvr:cvnHewlett-Packard:ct6:cvr:
  dmi.product.name: HP Compaq dc7900 Convertible Minitower
  dmi.sys.vendor: Hewlett-Packard

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