From 519ca9d017ab7eb4a15787bd8f2d867bebe375bc Mon Sep 17 00:00:00 2001 From: Marcel Holtmann Date: Fri, 10 Jan 2014 02:07:28 -0800 Subject: [PATCH] Bluetooth: Provide remote OOB data for Secure Connections When Secure Connections has been enabled it is possible to provide P-192 and/or P-256 data during the pairing process. The internal out-of-band credentials storage has been extended to also hold P-256 data. Initially the P-256 data will be empty and with Secure Connections enabled no P-256 data will be provided. This is according to the specification since it might be possible that the remote side did not provide either of the out-of-band credentials. Signed-off-by: Marcel Holtmann Signed-off-by: Johan Hedberg --- include/net/bluetooth/hci_core.h | 6 ++++-- net/bluetooth/hci_core.c | 6 +++--- net/bluetooth/hci_event.c | 32 ++++++++++++++++++++++++-------- 3 files changed, 31 insertions(+), 13 deletions(-) diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h index bd15eaa..5948930 100644 --- a/include/net/bluetooth/hci_core.h +++ b/include/net/bluetooth/hci_core.h @@ -114,8 +114,10 @@ struct link_key { struct oob_data { struct list_head list; bdaddr_t bdaddr; - u8 hash[16]; - u8 randomizer[16]; + u8 hash192[16]; + u8 randomizer192[16]; + u8 hash256[16]; + u8 randomizer256[16]; }; #define HCI_MAX_SHORT_NAME_LENGTH 10 diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c index 946631f..f13c055 100644 --- a/net/bluetooth/hci_core.c +++ b/net/bluetooth/hci_core.c @@ -2802,7 +2802,7 @@ int hci_add_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 *hash, data = hci_find_remote_oob_data(hdev, bdaddr); if (!data) { - data = kmalloc(sizeof(*data), GFP_ATOMIC); + data = kzalloc(sizeof(*data), GFP_ATOMIC); if (!data) return -ENOMEM; @@ -2810,8 +2810,8 @@ int hci_add_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 *hash, list_add(&data->list, &hdev->remote_oob_data); } - memcpy(data->hash, hash, sizeof(data->hash)); - memcpy(data->randomizer, randomizer, sizeof(data->randomizer)); + memcpy(data->hash192, hash, sizeof(data->hash192)); + memcpy(data->randomizer192, randomizer, sizeof(data->randomizer192)); BT_DBG("%s for %pMR", hdev->name, bdaddr); diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c index d5374d3..da1eca1 100644 --- a/net/bluetooth/hci_event.c +++ b/net/bluetooth/hci_event.c @@ -3391,20 +3391,36 @@ static void hci_remote_oob_data_request_evt(struct hci_dev *hdev, data = hci_find_remote_oob_data(hdev, &ev->bdaddr); if (data) { - struct hci_cp_remote_oob_data_reply cp; + if (test_bit(HCI_SC_ENABLED, &hdev->dev_flags)) { + struct hci_cp_remote_oob_ext_data_reply cp; - bacpy(&cp.bdaddr, &ev->bdaddr); - memcpy(cp.hash, data->hash, sizeof(cp.hash)); - memcpy(cp.randomizer, data->randomizer, sizeof(cp.randomizer)); + bacpy(&cp.bdaddr, &ev->bdaddr); + memcpy(cp.hash192, data->hash192, sizeof(cp.hash192)); + memcpy(cp.randomizer192, data->randomizer192, + sizeof(cp.randomizer192)); + memcpy(cp.hash256, data->hash256, sizeof(cp.hash256)); + memcpy(cp.randomizer256, data->randomizer256, + sizeof(cp.randomizer256)); + + hci_send_cmd(hdev, HCI_OP_REMOTE_OOB_EXT_DATA_REPLY, + sizeof(cp), &cp); + } else { + struct hci_cp_remote_oob_data_reply cp; - hci_send_cmd(hdev, HCI_OP_REMOTE_OOB_DATA_REPLY, sizeof(cp), - &cp); + bacpy(&cp.bdaddr, &ev->bdaddr); + memcpy(cp.hash, data->hash192, sizeof(cp.hash)); + memcpy(cp.randomizer, data->randomizer192, + sizeof(cp.randomizer)); + + hci_send_cmd(hdev, HCI_OP_REMOTE_OOB_DATA_REPLY, + sizeof(cp), &cp); + } } else { struct hci_cp_remote_oob_data_neg_reply cp; bacpy(&cp.bdaddr, &ev->bdaddr); - hci_send_cmd(hdev, HCI_OP_REMOTE_OOB_DATA_NEG_REPLY, sizeof(cp), - &cp); + hci_send_cmd(hdev, HCI_OP_REMOTE_OOB_DATA_NEG_REPLY, + sizeof(cp), &cp); } unlock: -- 2.7.4