This adds support for starting SMP Phase 2 Encryption, when the initial
SMP negotiation is successful. This adds the LE Start Encryption and LE
Long Term Key Request commands and related events.
Signed-off-by: NVinicius Costa Gomes <vinicius.gomes@openbossa.org>
Signed-off-by: NGustavo F. Padovan <padovan@profusion.mobi>

This patch includes support for generating and sending the random value
used to produce the confirmation value.
Signed-off-by: NAnderson Briglia <anderson.briglia@openbossa.org>
Signed-off-by: NVinicius Costa Gomes <vinicius.gomes@openbossa.org>
Signed-off-by: NGustavo F. Padovan <padovan@profusion.mobi>

This patch adds initial support for verifying the confirmation value
that the remote side has sent.
Signed-off-by: NAnderson Briglia <anderson.briglia@openbossa.org>
Signed-off-by: NVinicius Costa Gomes <vinicius.gomes@openbossa.org>
Signed-off-by: NGustavo F. Padovan <padovan@profusion.mobi>

This patch implements SMP crypto functions called ah, c1, s1 and e.
It also implements auxiliary functions. All These functions are needed
for SMP keys generation.
Signed-off-by: NAnderson Briglia <anderson.briglia@openbossa.org>
Signed-off-by: NAnderson Lizardo <anderson.lizardo@openbossa.org>
Signed-off-by: NBruna Moreira <bruna.moreira@openbossa.org>
Signed-off-by: NVinicius Costa Gomes <vinicius.gomes@openbossa.org>
Signed-off-by: NGustavo F. Padovan <padovan@profusion.mobi>

This will allow using the crypto subsystem for encrypting data. As SMP
(Security Manager Protocol) is implemented almost entirely on the host
side and the crypto module already implements the needed methods
(AES-128), it makes sense to use it.

There's now a new module option to enable/disable SMP support.
Signed-off-by: NVinicius Costa Gomes <vinicius.gomes@openbossa.org>
Signed-off-by: NAnderson Briglia <anderson.briglia@openbossa.org>
Signed-off-by: NGustavo F. Padovan <padovan@profusion.mobi>

This implementation only exchanges SMP messages between the Host and the
Remote. No keys are being generated. TK and STK generation will be
provided in further patches.
Signed-off-by: NVinicius Costa Gomes <vinicius.gomes@openbossa.org>
Signed-off-by: NGustavo F. Padovan <padovan@profusion.mobi>

These simple commands will allow the SMP procedure to be started
and terminated with a not supported error. This is the first step
toward something useful.
Signed-off-by: NVinicius Costa Gomes <vinicius.gomes@openbossa.org>
Signed-off-by: NAnderson Briglia <anderson.briglia@openbossa.org>
Signed-off-by: NGustavo F. Padovan <padovan@profusion.mobi>