can't mount encrypted dvd with 2.6.0

can't mount encrypted dvd with 2.6.0

[Thomas Fischbach]

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Hi,

if I create an encrypted iso image:
dd if=/dev/zero of=/files/image.iso bs=512 count=$((1024*4400))
losetup -e aes -k 256 /dev/loop1 /files/image.iso
mkisofs -r -o /dev/loop1 /files/stuff/*
losetup -d /dev/loop1 

I can mount the file:
mount /files/image.iso /mnt/cd -t iso9660 \
-o loop=/dev/loop1,encryption=aes,keybits=256

but when I burned the iso and tried to mount, it failed with:
mount: wrong fs type ...

and the logs says:
hdc: cdrom_read_intr: data underrun (2 blocks)
end_request: I/O error, dev hdc, sector 64
isofs_fill_super: bread failed, dev=loop0, iso_blknum=16, block=32

under 2.4.22 it works fine.
Hope someone can help.

Thanks,
Thomas

-- 
Thomas Fischbach
http://www.kennygno.net
webmaster@kennygno.net

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Re: can't mount encrypted dvd with 2.6.0

[bill davidsen]

In article <20040107151948.4376d881@kyp.intra>,
Thomas Fischbach  <webmaster@kennygno.net> wrote:

| if I create an encrypted iso image:
| dd if=/dev/zero of=/files/image.iso bs=512 count=$((1024*4400))
| losetup -e aes -k 256 /dev/loop1 /files/image.iso
| mkisofs -r -o /dev/loop1 /files/stuff/*
===> try adding -pad here
| losetup -d /dev/loop1 
| 
| I can mount the file:
| mount /files/image.iso /mnt/cd -t iso9660 \
| -o loop=/dev/loop1,encryption=aes,keybits=256
| 
| but when I burned the iso and tried to mount, it failed with:
| mount: wrong fs type ...
| 
| and the logs says:
| hdc: cdrom_read_intr: data underrun (2 blocks)
| end_request: I/O error, dev hdc, sector 64
| isofs_fill_super: bread failed, dev=loop0, iso_blknum=16, block=32
| 
| under 2.4.22 it works fine.
| Hope someone can help.
| 
| Thanks,
| Thomas
| 
| -- 
| Thomas Fischbach
| http://www.kennygno.net
| webmaster@kennygno.net
| 
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-- 
bill davidsen <davidsen@tmr.com>
  CTO, TMR Associates, Inc
Doing interesting things with little computers since 1979.

Re: can't mount encrypted dvd with 2.6.0

[Thomas Fischbach]

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On 7 Jan 2004 23:07:45 GMT
davidsen@tmr.com (bill davidsen) wrote:

> In article <20040107151948.4376d881@kyp.intra>,
> Thomas Fischbach  <webmaster@kennygno.net> wrote:
> 
> | if I create an encrypted iso image:
> | dd if=/dev/zero of=/files/image.iso bs=512 count=$((1024*4400))
> | losetup -e aes -k 256 /dev/loop1 /files/image.iso
> | mkisofs -r -o /dev/loop1 /files/stuff/*
> ===> try adding -pad here

[...]

I think -pad is used by default.

I tried the patch from Ben and it works.
http://testing.lkml.org/slashdot.php?mid=442410

Thanks

-- 
Thomas Fischbach
http://www.kennygno.net
webmaster@kennygno.net

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Re: can't mount encrypted dvd with 2.6.0

[Bill Davidsen]

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On Thu, 8 Jan 2004, Thomas Fischbach wrote:

> On 7 Jan 2004 23:07:45 GMT
> davidsen@tmr.com (bill davidsen) wrote:
> 
> > In article <20040107151948.4376d881@kyp.intra>,
> > Thomas Fischbach  <webmaster@kennygno.net> wrote:
> > 
> > | if I create an encrypted iso image:
> > | dd if=/dev/zero of=/files/image.iso bs=512 count=$((1024*4400))
> > | losetup -e aes -k 256 /dev/loop1 /files/image.iso
> > | mkisofs -r -o /dev/loop1 /files/stuff/*
> > ===> try adding -pad here
> 
> [...]
> 
> I think -pad is used by default.

-pad is used by default on cdrecord, but not on mkisofs AFAIK. Since you
didn't specify how you did the burn, or I missed it, I thought it was
worth a try in case you were using some other software.

> 
> I tried the patch from Ben and it works.
> http://testing.lkml.org/slashdot.php?mid=442410

Then hopefully it will appear in a future bk after additional testing.

-- 
bill davidsen <davidsen@tmr.com>
  CTO, TMR Associates, Inc
Doing interesting things with little computers since 1979.

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