From: Johan Hedberg <johan.hedberg@xxxxxxxxx>
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@xxxxxxxxx>
---
v2: Properly initialize "error" if crypto init fails
include/net/bluetooth/hci_core.h | 1 +
net/bluetooth/hci_core.c | 17 ++++++++++++++++-
2 files changed, 17 insertions(+), 1 deletion(-)
diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h
index 92fa75fce29d..b344890b18f5 100644
--- a/include/net/bluetooth/hci_core.h
+++ b/include/net/bluetooth/hci_core.h
@@ -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;
diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
index b40d52446f8f..df25af5502ef 100644
--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -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);
--
1.8.5.3
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