From owner-freebsd-questions@FreeBSD.ORG  Thu Nov  1 04:53:55 2007
Return-Path: <owner-freebsd-questions@FreeBSD.ORG>
Delivered-To: freebsd-questions@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 49D2E16A469
	for <freebsd-questions@freebsd.org>;
	Thu,  1 Nov 2007 04:53:55 +0000 (UTC) (envelope-from yuri@rawbw.com)
Received: from mail0.rawbw.com (mail0.rawbw.com [198.144.192.41])
	by mx1.freebsd.org (Postfix) with ESMTP id 3753913C4A6
	for <freebsd-questions@freebsd.org>;
	Thu,  1 Nov 2007 04:53:55 +0000 (UTC) (envelope-from yuri@rawbw.com)
Received: from mail0.rawbw.com (localhost [127.0.0.1])
	by mail0.rawbw.com (8.13.8/8.13.8) with ESMTP id lA132Und044410;
	Wed, 31 Oct 2007 20:02:30 -0700 (PDT)
Received: (from www@localhost)
	by mail0.rawbw.com (8.13.8/8.13.8/Submit) id lA132UAc044406;
	Wed, 31 Oct 2007 20:02:30 -0700 (PDT)
X-Authentication-Warning: mail0.rawbw.com: www set sender to yuri@rawbw.com
	using -f
Received: from ip224.carlyle.sfo.ygnition.net (ip224.carlyle.sfo.ygnition.net
	[24.219.144.224]) by webmail.rawbw.com (IMP) with HTTP 
	for <yuri@mail0.rawbw.com>; Wed, 31 Oct 2007 20:02:30 -0700
Message-ID: <1193886150.472941c62f0e7@webmail.rawbw.com>
Date: Wed, 31 Oct 2007 20:02:30 -0700
From: Yuri <yuri@rawbw.com>
To: freebsd-questions@freebsd.org
MIME-Version: 1.0
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 8bit
User-Agent: Internet Messaging Program (IMP) 3.2.1
X-Originating-IP: 24.219.144.224
Cc: yuri@tsoft.com
Subject: "Error cracking CSS key" error while running dvdbackup on video DVD
	disk
X-BeenThere: freebsd-questions@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: User questions <freebsd-questions.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>, 
	<mailto:freebsd-questions-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-questions>
List-Post: <mailto:freebsd-questions@freebsd.org>
List-Help: <mailto:freebsd-questions-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>, 
	<mailto:freebsd-questions-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Thu, 01 Nov 2007 04:53:55 -0000

I know that similar question was already asked in numerous groups/mail-lists but
I couldn't find the definitive answer.

Sometimes when I run dvdbackup (port sysutils/dvdbackup) I get the following error:
libdvdread: Error cracking CSS key for /VIDEO_TS/VTS_01_0.VOB (0x00003ae0)
and many other ones similarly looking.

After some debugging I found that error originates in libdvdcss, in file 'ioctl.c':
...
    struct dvd_authinfo auth_info;
    
    memset( &auth_info, 0, sizeof( auth_info ) );
    auth_info.format = DVD_REPORT_TITLE_KEY;
    auth_info.agid = *pi_agid;
    auth_info.lba = i_pos;
    
    i_ret = ioctl( i_fd, DVDIOCREPORTKEY, &auth_info );
...
here lba = 15072 and agid=0 (in one of the cases).

Simultaneously dmesg reports another error line:
acd0: FAILURE - REPORT_KEY ILLEGAL REQUEST asc=0x6f ascq=0x04
And stderr message is being printed:
libdvdread: Error cracking CSS key for /VIDEO_TS/VTS_01_0.VOB (0x00003ae0)

So is this likely a bug in libdvdcss, libdvdread or ATAPI driver?

Yuri