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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: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Johan Hedberg 2014-02-18 10:40:07 +02:00 committed by Marcel Holtmann
parent 60478054a6
commit 99780a7b63
2 changed files with 17 additions and 1 deletions
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1
include/net/bluetooth/hci_core.h
View File

@ -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;

17
net/bluetooth/hci_core.c
View File

@ -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);