[dm-crypt] Detached header

[dm-crypt] Detached header

[Jan Janssen]

Hi,

I'm experimenting with LUKS detached header and I had the problem that 
cryptsetup binary does not like regular files when provided with 
--header (both luksFormat and open). When I make a manual losetup with 
the same header file and provide the loop device to --header everything 
works fine.

According to the man page, --header is supposed to work for regular 
files too. This should either get fixed or the manual page be updated.

Jan Janssen

Re: [dm-crypt] Detached header

[Arno Wagner]

Have you read the section "NOTES ON PASSPHRASE PROCESSING FOR LUKS"
in the man-page?

Arno

On Thu, Apr 17, 2014 at 20:12:20 CEST, Jan Janssen wrote:
> Hi,
> 
> I'm experimenting with LUKS detached header and I had the problem
> that cryptsetup binary does not like regular files when provided
> with --header (both luksFormat and open). When I make a manual
> losetup with the same header file and provide the loop device to
> --header everything works fine.
> 
> According to the man page, --header is supposed to work for regular
> files too. This should either get fixed or the manual page be
> updated.
> 
> Jan Janssen
> _______________________________________________
> dm-crypt mailing list
> dm-crypt@saout.de
> http://www.saout.de/mailman/listinfo/dm-crypt

-- 
Arno Wagner,     Dr. sc. techn., Dipl. Inform.,    Email: arno@wagner.name
GnuPG: ID: CB5D9718  FP: 12D6 C03B 1B30 33BB 13CF  B774 E35C 5FA1 CB5D 9718
----
A good decision is based on knowledge and not on numbers. -  Plato

Re: [dm-crypt] Detached header

[Milan Broz]

On 04/17/2014 08:12 PM, Jan Janssen wrote:
> Hi,
> 
> I'm experimenting with LUKS detached header and I had the problem that 
> cryptsetup binary does not like regular files when provided with 
> --header (both luksFormat and open). When I make a manual losetup with 
> the same header file and provide the loop device to --header everything 
> works fine.
> 
> According to the man page, --header is supposed to work for regular 
> files too. This should either get fixed or the manual page be updated.

Detached header should works with regular files.

Can you provide more info what is not working? Please post failing command with
added --debug and provide exact versions of cryptsetup.

Milan

Re: [dm-crypt] Detached header

[Jan Janssen]

On 04/17/2014 08:27 PM, Milan Broz wrote:
> On 04/17/2014 08:12 PM, Jan Janssen wrote:
>> Hi,
>>
>> I'm experimenting with LUKS detached header and I had the problem that
>> cryptsetup binary does not like regular files when provided with
>> --header (both luksFormat and open). When I make a manual losetup with
>> the same header file and provide the loop device to --header everything
>> works fine.
>>
>> According to the man page, --header is supposed to work for regular
>> files too. This should either get fixed or the manual page be updated.
>
> Detached header should works with regular files.
>
> Can you provide more info what is not working? Please post failing command with
> added --debug and provide exact versions of cryptsetup.
>
> Milan
>

Sorry for the noise, I had a typo in the header file name.

Jan