RE: [PATCH BlueZ 01/11] mgmt-api: Update the commands for exchanging LTK's
From: Ganir, Chen <hidden>
Date: 2012-01-18 07:17:02
Vinicius,
-----Original Message----- From: linux-bluetooth-owner@vger.kernel.org [mailto:linux-bluetooth- owner@vger.kernel.org] On Behalf Of Vinicius Costa Gomes Sent: Wednesday, January 18, 2012 1:29 AM To: linux-bluetooth@vger.kernel.org Cc: Vinicius Costa Gomes Subject: [PATCH BlueZ 01/11] mgmt-api: Update the commands for exchanging LTK's For restoring the device from storage we need to have the Address type of the device, the LTK is a good place for this.
Storing the address type in the LTK is not perfect. For this to work properly, you will store the address type only for devices which exchanged keys. What if we have devices which do not do pairing or exchange keys at all ? What if we use the CreateDevice instead of CreatePairedDevice? In that case we will not have the address type for future reconnections. We need to store the device address type in a separate file (for example, addresstypes) and manage it separately from the LTK management.
quoted hunk ↗ jump to hunk
In some cases, we may be notified of keys that were generated in the Host, that key key would be used when the Host is the slave role in a later connection, we should be able to differentiate this type of key because it doesn't mean that we have a bonding with the Remote Device. --- doc/mgmt-api.txt | 4 ++++ 1 files changed, 4 insertions(+), 0 deletions(-)diff --git a/doc/mgmt-api.txt b/doc/mgmt-api.txt index 3e188c2..8fe7c94 100644 --- a/doc/mgmt-api.txt +++ b/doc/mgmt-api.txt@@ -477,7 +477,9 @@ Load Long Term Keys Command Command Parameters: Key Count (2 Octets) Key1 { Address (6 Octets) + Type (1 Octet) Authenticated (1 Octet) + Master (1 Octet) Encryption Size (1 Octet) Enc. Diversifier (2 Octets) Random Number (8 Octets)@@ -758,7 +760,9 @@ Controller Index <controller id> Event Parameters Store Hint (1 Octet) Key { Address (6 Octets) + Type (1 Octet) Authenticated (1 Octet) + Master (1 Octet) Encryption Size (1 Octet) Enc. Diversifier (2 Octets) Random Number (8 Octets) --1.7.8.1 -- To unsubscribe from this list: send the line "unsubscribe linux- bluetooth" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Thanks, Chen Ganir