Commit 99780a7b authored by Johan Hedberg's avatar Johan Hedberg Committed by Marcel Holtmann
Browse files

Bluetooth: Add AES crypto context for each HCI device 



Previously the crypto context has only been available for LE SMP
sessions, but now that we'll need to perform operations also during
discovery it makes sense to have this context part of the hci_dev
struct. Later, the context can be removed from the SMP context.

Signed-off-by: default avatarJohan Hedberg <johan.hedberg@intel.com>
Signed-off-by: default avatarMarcel Holtmann <marcel@holtmann.org>
parent 60478054

include/net/bluetooth/hci_core.h

+1 −0
Original line number Diff line number Diff line
@@ -259,6 +259,7 @@ struct hci_dev { 
	__u32			req_status;

	__u32			req_result;



	struct crypto_blkcipher	*tfm_aes;



	struct discovery_state	discovery;

	struct hci_conn_hash	conn_hash;

net/bluetooth/hci_core.c

+16 −1
Original line number Diff line number Diff line
@@ -29,6 +29,7 @@ 
#include <linux/idr.h>

#include <linux/rfkill.h>

#include <linux/debugfs.h>

#include <linux/crypto.h>

#include <asm/unaligned.h>



#include <net/bluetooth/bluetooth.h>
@@ -3205,9 +3206,18 @@ int hci_register_dev(struct hci_dev *hdev) 


	dev_set_name(&hdev->dev, "%s", hdev->name);



	hdev->tfm_aes = crypto_alloc_blkcipher("ecb(aes)", 0,

					       CRYPTO_ALG_ASYNC);

	if (IS_ERR(hdev->tfm_aes)) {

		BT_ERR("Unable to create crypto context");

		error = PTR_ERR(hdev->tfm_aes);

		hdev->tfm_aes = NULL;

		goto err_wqueue;

	}



	error = device_add(&hdev->dev);

	if (error < 0)

		goto err_wqueue;

		goto err_tfm;



	hdev->rfkill = rfkill_alloc(hdev->name, &hdev->dev,

				    RFKILL_TYPE_BLUETOOTH, &hci_rfkill_ops,
@@ -3243,6 +3253,8 @@ int hci_register_dev(struct hci_dev *hdev) 


	return id;



err_tfm:

	crypto_free_blkcipher(hdev->tfm_aes);

err_wqueue:

	destroy_workqueue(hdev->workqueue);

	destroy_workqueue(hdev->req_workqueue);
@@ -3293,6 +3305,9 @@ void hci_unregister_dev(struct hci_dev *hdev) 
		rfkill_destroy(hdev->rfkill);

	}



	if (hdev->tfm_aes)

		crypto_free_blkcipher(hdev->tfm_aes);



	device_del(&hdev->dev);



	debugfs_remove_recursive(hdev->debugfs);

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