[Bluez-users] Encryption Key Length Negotiation & Link Key Type

["Matthias Ritscher, Fraunhofer-Institut SIT" <matthias.ritscher@sit.fraunhofer.de>]

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Hi Bluez-List,

1)
I´m trying to get any information about the Encryption Key Negotiation 
Process of paired Bluetooth devices (Laptop with Bluez-stack and a 
Handheld Device). Using hcidump I could not receive any information 
about this exchange which corresponds to that negotiation. I sniffed 
communication exchange during pairing and communication transmission. 
Encryption at the host is enabled in the hcid.conf file and can be seen 
using "hcitool con".
I´m interested in the length of the negotiated Encryption key Kc. Is 
there any way to retrieve its length (or value) in the Bluez-stack ?

2)
The second issue I´m focussing in this request is the question: Is there 
is a possibility in the Bluez-stack to "simulate" devices with light 
memory or computing power ;-) ? This means, is there a possibility that 
the Bluez-stack will use a Local Unit Key as Link Key proposal. I´m 
interested, since the counterpart (Handheld Device) is supposed by 
specification to accept Combination Keys as Link Keys only, and I want 
to test it.

Thanks for your attention,
Matthias


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