Bluetooth: Add support for using the crypto subsystem

[pandora-kernel.git] / net / bluetooth / hci_core.c

diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
index e14e8a1..f62ca19 100644 (file)
--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -42,6 +42,7 @@
 #include <linux/notifier.h>
 #include <linux/rfkill.h>
 #include <linux/timer.h>
+#include <linux/crypto.h>
 #include <net/sock.h>
 
 #include <asm/system.h>
@@ -59,6 +60,8 @@ static void hci_tx_task(unsigned long arg);
 
 static DEFINE_RWLOCK(hci_task_lock);
 
+static int enable_smp;
+
 /* HCI device list */
 LIST_HEAD(hci_dev_list);
 DEFINE_RWLOCK(hci_dev_list_lock);
@@ -1274,6 +1277,14 @@ int hci_add_adv_entry(struct hci_dev *hdev,
        return 0;
 }
 
+static struct crypto_blkcipher *alloc_cypher(void)
+{
+       if (enable_smp)
+               return crypto_alloc_blkcipher("ecb(aes)", 0, CRYPTO_ALG_ASYNC);
+
+       return ERR_PTR(-ENOTSUPP);
+}
+
 /* Register HCI device */
 int hci_register_dev(struct hci_dev *hdev)
 {
@@ -1358,6 +1369,11 @@ int hci_register_dev(struct hci_dev *hdev)
        if (!hdev->workqueue)
                goto nomem;
 
+       hdev->tfm = alloc_cypher();
+       if (IS_ERR(hdev->tfm))
+               BT_INFO("Failed to load transform for ecb(aes): %ld",
+                                                       PTR_ERR(hdev->tfm));
+
        hci_register_sysfs(hdev);
 
        hdev->rfkill = rfkill_alloc(hdev->name, &hdev->dev,
@@ -1406,6 +1422,9 @@ int hci_unregister_dev(struct hci_dev *hdev)
                                        !test_bit(HCI_SETUP, &hdev->flags))
                mgmt_index_removed(hdev->id);
 
+       if (!IS_ERR(hdev->tfm))
+               crypto_free_blkcipher(hdev->tfm);
+
        hci_notify(hdev, HCI_DEV_UNREG);
 
        if (hdev->rfkill) {
@@ -2242,3 +2261,6 @@ static void hci_cmd_task(unsigned long arg)
                }
        }
 }
+
+module_param(enable_smp, bool, 0644);
+MODULE_PARM_DESC(enable_smp, "Enable SMP support (LE only)");