[Bluez-devel] Is LMP implemented in BlueZ?

[Bluez-devel] Is LMP implemented in BlueZ?

[Zmej Gorianin]

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Hello,
I am currently doing my bachelor's dissertation about creating an
alternative Bluetooth authentication and key exchange scheme, using public
key crypto, and would like to know whether I should build on top of the
Bluetooth protocol stack or I can actually add code inside the LMP.  I have
looked thorough the code in the BlueZ kernel module  and  In bluez -libs
package and I'm left with the impression that the link manager and the LMP
are part of the Bluetooth device's firmware, while the HCI asks it to
initiate specific LMP transactions. So my question is whether LMP is a
software component implemented by BlueZ on a computer or it's a firmware
component on the Bluetooth receiver connected to the computer. I'd be
thankful if somebody can clarify that for me.

Regards.

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Re: [Bluez-devel] Is LMP implemented in BlueZ?

[Marcel Holtmann]

Hi,

> I am currently doing my bachelor's dissertation about creating an
> alternative Bluetooth authentication and key exchange scheme, using
> public key crypto, and would like to know whether I should build on
> top of the Bluetooth protocol stack or I can actually add code inside
> the LMP.  I have looked thorough the code in the BlueZ kernel module
> and  In bluez -libs package and I'm left with the impression that the
> link manager and the LMP are part of the Bluetooth device's firmware,
> while the HCI asks it to initiate specific LMP transactions. So my
> question is whether LMP is a software component implemented by BlueZ
> on a computer or it's a firmware component on the Bluetooth receiver
> connected to the computer. I'd be thankful if somebody can clarify
> that for me. 

the LMP implementation is part of the firmware inside the Bluetooth
chip.

Regards

Marcel



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Re: [Bluez-devel] Is LMP implemented in BlueZ?

[Zmej Gorianin]

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2007/3/15, Marcel Holtmann <marcel@holtmann.org>:
>
> Hi,
>
> > I am currently doing my bachelor's dissertation about creating an
> > alternative Bluetooth authentication and key exchange scheme, using
> > public key crypto, and would like to know whether I should build on
> > top of the Bluetooth protocol stack or I can actually add code inside
> > the LMP.  I have looked thorough the code in the BlueZ kernel module
> > and  In bluez -libs package and I'm left with the impression that the
> > link manager and the LMP are part of the Bluetooth device's firmware,
> > while the HCI asks it to initiate specific LMP transactions. So my
> > question is whether LMP is a software component implemented by BlueZ
> > on a computer or it's a firmware component on the Bluetooth receiver
> > connected to the computer. I'd be thankful if somebody can clarify
> > that for me.
>
> the LMP implementation is part of the firmware inside the Bluetooth
> chip.
>
> Regards
>
> Marcel
>
>
>
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Thank you very much. Can you tell me then, if I can tamper with the
semi-permanent keys or are they stored within the device also. I need to
know whether I can overwrite them in some way or I have to work without
augmenting the existing authentication and key exchange scheme at all.
Thanks in advance.

Regards,
Dragomir

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Re: [Bluez-devel] Is LMP implemented in BlueZ?

[Zmej Gorianin]

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2007/3/15, Zmej Gorianin <mortagon.iyi@gmail.com>:
>
>
>
> 2007/3/15, Marcel Holtmann <marcel@holtmann.org>:
> >
> > Hi,
> >
> > > I am currently doing my bachelor's dissertation about creating an
> > > alternative Bluetooth authentication and key exchange scheme, using
> > > public key crypto, and would like to know whether I should build on
> > > top of the Bluetooth protocol stack or I can actually add code inside
> > > the LMP.  I have looked thorough the code in the BlueZ kernel module
> > > and  In bluez -libs package and I'm left with the impression that the
> > > link manager and the LMP are part of the Bluetooth device's firmware,
> > > while the HCI asks it to initiate specific LMP transactions. So my
> > > question is whether LMP is a software component implemented by BlueZ
> > > on a computer or it's a firmware component on the Bluetooth receiver
> > > connected to the computer. I'd be thankful if somebody can clarify
> > > that for me.
> >
> > the LMP implementation is part of the firmware inside the Bluetooth
> > chip.
> >
> > Regards
> >
> > Marcel
> >
> >
> Thank you very much. Can you tell me then, if I can tamper with the
> semi-permanent keys or are they stored within the device also. I need to
> know whether I can overwrite them in some way or I have to work without
> augmenting the existing authentication and key exchange scheme at all.
> Thanks in advance.
>
> Regards,
> Dragomir
>

I found what I needed in the bluez-utils package. Sorry to bother everyone.

Regards.

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