[uml-devel] Cryptolook device?

[uml-devel] Cryptolook device?

[Sven Köhler]

hi,

menuconfig doesn't show the crypto loopback device. i'm just curious, 
but why is it disabled? or has it just been forgotten?

thx
   sven



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Re: [uml-devel] Cryptolook device?

[Sven 'Darkman' Michels]

Sven Köhler wrote:
> hi,
> 
> menuconfig doesn't show the crypto loopback device. i'm just curious, 
> but why is it disabled? or has it just been forgotten?

Good question, once i tried to add twofish support (by a manual
patch) but it doesn't seem to work (maybe its due to the lack
of module support, but i'm not sure about)

Regards,
Sven



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Re: [uml-devel] Cryptolook device?

[Chris Watt]

At 03:28 PM 13/03/2004 +0100, you wrote:
>hi,
>
>menuconfig doesn't show the crypto loopback device. i'm just curious, but 
>why is it disabled? or has it just been forgotten?

I've been told that it was mostly excluded because the pristine source 
doesn't include cryptoloop and nobody had expressed much interest in the 
CryptoAPI.

I patched it into 2.4.24 a while back, but I've misplaced my patch. You may 
be able to find it in the uml-devel archives. Basically I just did the 
following:

- Apply a cryptoloop patch (I forget if I was using cryptoloop-jari or 
cryptoloop-hvr, it was whichever was larger at the time because the smaller 
one didn't behave well with encrypted swap).

- Apply a UML patch.

- Alter the arch/um config files to include the CryptoAPI and cryptoloop 
config options.

It seemed to work quite well at the time.

If you're not in any rush and don't want to do it yourself, e-mail me back. 
I'll probably be getting back to UML in a more serious way in a couple of 
weeks, at which point I'll do something similar for 2.4.25 (or whatever the 
latest 2.4 kernel with a stable UML patch is at the time).




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Re: [uml-devel] Cryptolook device?

[Sven Köhler]

>> menuconfig doesn't show the crypto loopback device. i'm just curious, 
>> but why is it disabled? or has it just been forgotten?
> 
> I patched it into 2.4.24 a while back, but I've misplaced my patch. You 
> may be able to find it in the uml-devel archives. Basically I just did 
> the following:

I'm talking about 2.6.4-um1 which doesn't include the CryptoLoop device 
although it is available in 2.6.4 without any additional patch.
It seems to me, as if Jeff just forgot to put it into some file (i'm 
don't know much about how menuconfig works, and where the config for 
that is).


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Re: [uml-devel] Cryptolook device?

[Sven 'Darkman' Michels]

Sven Köhler wrote:

> I'm talking about 2.6.4-um1 which doesn't include the CryptoLoop device 
> although it is available in 2.6.4 without any additional patch.
> It seems to me, as if Jeff just forgot to put it into some file (i'm 
> don't know much about how menuconfig works, and where the config for 
> that is).

for 2.4.x:
add:

source crypto/Config.in

at the end of arch/um/config.in

to get the options... BUT:
i don't know if thats enough. I played with 2.4 and can't get it
to work. /proc/crypto is there and looks ok, but losetup doesn't
work. Probably because i'm using a non modular kernel.

Regards,
Sven (the other one ;)



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Re: [uml-devel] Cryptolook device?

[Chris Watt]

At 02:28 AM 14/03/2004 +0100, you wrote:
>add:
>
>source crypto/Config.in
>
>at the end of arch/um/config.in

This adds CryptoAPI, which required for cryptoloop, but not all that's 
required. In 2.4 you also need to apply one of the cryptoloop patches that 
are drifting around, otherwise your loopback device won't actually use the 
CryptoAPI.





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