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* Bluetooth: Add support for storing the key sizeVinicius Costa Gomes2011-07-081-5/+9
| | | | | | | | | | | | | | | | | In some cases it will be useful having the key size used for encrypting the link. For example, some profiles may restrict some operations depending on the key length. The key size is stored in the key that is passed to userspace using the pin_length field in the key structure. For now this field is only valid for LE controllers. 3.0+HS controllers define the Read Encryption Key Size command, this field is intended for storing the value returned by that command. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
* Bluetooth: Remove unused field in hci_connVinicius Costa Gomes2011-07-081-2/+0
| | | | | Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
* Bluetooth: Use the stored LTK for restabilishing securityVinicius Costa Gomes2011-07-081-0/+12
| | | | | | | | | | Now that it's possible that the exchanged key is present in the link key list, we may be able to estabilish security with an already existing key, without need to perform any SMP procedure. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
* Bluetooth: Use the link key list to temporarily store the STKVinicius Costa Gomes2011-07-081-8/+15
| | | | | | | | | With this we can use only one place to store all keys, without need to use a field in the connection structure for this purpose. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
* Bluetooth: Add support for storing the LTKVinicius Costa Gomes2011-07-081-6/+14
| | | | | | | | Now when the LTK is received from the remote or generated it is stored, so it can later be used. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
* Bluetooth: Fix SM pairing parameters negotiationVinicius Costa Gomes2011-07-081-10/+30
| | | | | | | | | | | | | Before implementing SM key distribution, the pairing features exchange must be better negotiated, taking into account some features of the host and connection requirements. If we are in the "not pairable" state, it makes no sense to exchange any key. This allows for simplification of the key negociation method. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
* Bluetooth: Add support for SMP phase 3 (key distribution)Vinicius Costa Gomes2011-07-081-2/+112
| | | | | | | | | | | | | This adds support for generating and distributing all the keys specified in the third phase of SMP. This will make possible to re-establish secure connections, resolve private addresses and sign commands. For now, the values generated are random. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
* Bluetooth: Remove enable_smp parameterAndre Guedes2011-07-061-0/+9
| | | | | | | | The enable_smp parameter is no longer needed. It can be replaced by checking lmp_host_le_capable. Signed-off-by: Andre Guedes <andre.guedes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
* Bluetooth: include scatterlist.h where neededStephen Rothwell2011-06-241-0/+1
| | | | | | | | | | | | | | | net/bluetooth/smp.c: In function 'smp_e': net/bluetooth/smp.c:49:21: error: storage size of 'sg' isn't known net/bluetooth/smp.c:67:2: error: implicit declaration of function 'sg_init_one' net/bluetooth/smp.c:49:21: warning: unused variable 'sg' Caused by commit d22ef0bc83c5 ("Bluetooth: Add LE SMP Cryptoolbox functions"). Missing include file, presumably. This batch has been in the bluetooth tree since June 14, so it may have been exposed by the removal of linux/mm.h from netdevice.h ... Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* Bluetooth: Add key size checks for SMPVinicius Costa Gomes2011-06-141-13/+41
| | | | | | | | | | | This patch implements a check in smp cmd pairing request and pairing response to verify if encryption key maximum size is compatible in both slave and master when SMP Pairing is requested. Keys are also masked to the correct negotiated size. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Anderson Briglia <anderson.briglia@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
* Bluetooth: Add support for SMP timeoutVinicius Costa Gomes2011-06-141-0/+14
| | | | | | | | | | | | This patch adds support for disconnecting the link when SMP procedure takes more than 30 seconds. SMP begins when either the Pairing Request command is sent or the Pairing Response is received, and it ends when the link is encrypted (or terminated). Vol 3, Part H Section 3.4. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
* Bluetooth: Add support for Pairing features exchangeVinicius Costa Gomes2011-06-131-53/+53
| | | | | | | | | | | This patch implements a simple version of the SMP Pairing Features exchange procedure (Vol. 3 Part H, Section 2.3.5.1). For now, everything that would cause a Pairing Method different of Just Works to be chosen is rejected. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
* Bluetooth: Add support for building pairing commandsVinicius Costa Gomes2011-06-131-0/+11
| | | | | | | | | | | Before we are able to do a proper exchange of pairing parameters, we need a unified way of building pairing requests and responses. For IO Capability we use the value that was set by userspace, using the management interface. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
* Bluetooth: Add support for resuming socket when SMP is finishedVinicius Costa Gomes2011-06-131-12/+28
| | | | | | | | This adds support for resuming the user space traffic when SMP negotiation is complete. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
* Bluetooth: Remove debug statementsVinicius Costa Gomes2011-06-131-5/+1
| | | | | | | | Now that these commands are sent to the controller we can use hcidump to verify that the correct values are produced. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
* Bluetooth: Add support for LE Start EncryptionVinicius Costa Gomes2011-06-131-4/+12
| | | | | | | | | 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: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
* Bluetooth: Add SMP confirmation checks methodsAnderson Briglia2011-06-131-14/+83
| | | | | | | | | This patch includes support for generating and sending the random value used to produce the confirmation value. Signed-off-by: Anderson Briglia <anderson.briglia@openbossa.org> Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
* Bluetooth: Add SMP confirmation structsAnderson Briglia2011-06-131-0/+17
| | | | | | | | | This patch adds initial support for verifying the confirmation value that the remote side has sent. Signed-off-by: Anderson Briglia <anderson.briglia@openbossa.org> Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
* Bluetooth: Add LE SMP Cryptoolbox functionsAnderson Briglia2011-06-131-0/+117
| | | | | | | | | | | | 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: Anderson Briglia <anderson.briglia@openbossa.org> Signed-off-by: Anderson Lizardo <anderson.lizardo@openbossa.org> Signed-off-by: Bruna Moreira <bruna.moreira@openbossa.org> Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
* Bluetooth: Add support for using the crypto subsystemVinicius Costa Gomes2011-06-131-4/+18
| | | | | | | | | | | | | 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: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Anderson Briglia <anderson.briglia@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
* Bluetooth: Add simple SMP pairing negotiationAnderson Briglia2011-06-131-5/+102
| | | | | | | | | 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: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
* Bluetooth: Implement the first SMP commandsAnderson Briglia2011-06-131-0/+146
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: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Anderson Briglia <anderson.briglia@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
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