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.
Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@xxxxxxxxxxxxx>
---
include/net/bluetooth/hci_core.h | 2 ++
net/bluetooth/hci_core.c | 10 ++++++++++
2 files changed, 12 insertions(+), 0 deletions(-)
diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h
index 0687e2f..d0a9f5d 100644
--- a/include/net/bluetooth/hci_core.h
+++ b/include/net/bluetooth/hci_core.h
@@ -135,6 +135,8 @@ struct hci_dev {
__u32 req_status;
__u32 req_result;
+ struct crypto_blkcipher *tfm;
+
struct inquiry_cache inq_cache;
struct hci_conn_hash conn_hash;
struct list_head blacklist;
diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
index 12c6735..b96c3dd 100644
--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -41,6 +41,7 @@
#include <linux/interrupt.h>
#include <linux/notifier.h>
#include <linux/rfkill.h>
+#include <linux/crypto.h>
#include <net/sock.h>
#include <asm/system.h>
@@ -961,6 +962,13 @@ int hci_register_dev(struct hci_dev *hdev)
if (!hdev->workqueue)
goto nomem;
+ hdev->tfm = crypto_alloc_blkcipher("ecb(aes)", 0, CRYPTO_ALG_ASYNC);
+ if (IS_ERR(hdev->tfm)) {
+ BT_ERR("Failed to load transform for ecb(aes): %ld",
+ PTR_ERR(hdev->tfm));
+ goto nomem;
+ }
+
hci_register_sysfs(hdev);
hdev->rfkill = rfkill_alloc(hdev->name, &hdev->dev,
@@ -1001,6 +1009,8 @@ int hci_unregister_dev(struct hci_dev *hdev)
for (i = 0; i < NUM_REASSEMBLY; i++)
kfree_skb(hdev->reassembly[i]);
+ crypto_free_blkcipher(hdev->tfm);
+
hci_notify(hdev, HCI_DEV_UNREG);
if (hdev->rfkill) {
--
1.7.3.2
--
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