From 99780a7b639e73d8f8f291fa1a981db883aec47f Mon Sep 17 00:00:00 2001 From: Johan Hedberg Date: Tue, 18 Feb 2014 10:40:07 +0200 Subject: [PATCH] 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 Signed-off-by: Marcel Holtmann --- 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 #include #include +#include #include #include @@ -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); -- GitLab