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Bluetooth: Use the updated key structures for handling LTKs

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This updates all the users of the older way, that was using the
link_keys list to store the SMP keys, to use the new way.

This includes defining new types for the keys, we have a type for each
combination of STK/LTK and Master/Slave.

Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org>
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
This commit is contained in:
Vinicius Costa Gomes
2012-02-02 21:08:01 -03:00
committed by Johan Hedberg
parent b899efaf9b
commit c9839a11c0
4 changed files with 71 additions and 65 deletions
Download Patch File Download Diff File Expand all files Collapse all files

38
net/bluetooth/smp.c
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@ -475,8 +475,9 @@ static void random_work(struct work_struct *work)
memset(stk + smp->enc_key_size, 0,
SMP_MAX_ENC_KEY_SIZE - smp->enc_key_size);
hci_add_ltk(hcon->hdev, 0, conn->dst, smp->enc_key_size,
ediv, rand, stk);
hci_add_ltk(hcon->hdev, conn->dst, hcon->dst_type,
HCI_SMP_STK_SLAVE, 0, 0, stk,
smp->enc_key_size, ediv, rand);
}
return;
@ -701,22 +702,18 @@ static u8 smp_cmd_pairing_random(struct l2cap_conn *conn, struct sk_buff *skb)
static u8 smp_ltk_encrypt(struct l2cap_conn *conn)
{
struct link_key *key;
struct key_master_id *master;
struct smp_ltk *key;
struct hci_conn *hcon = conn->hcon;
key = hci_find_link_key_type(hcon->hdev, conn->dst,
HCI_LK_SMP_LTK);
key = hci_find_ltk_by_addr(hcon->hdev, conn->dst, hcon->dst_type);
if (!key)
return 0;
if (test_and_set_bit(HCI_CONN_ENCRYPT_PEND, &hcon->flags))
return 1;
master = (void *) key->data;
hci_le_start_enc(hcon, master->ediv, master->rand,
key->val);
hcon->enc_key_size = key->pin_len;
hci_le_start_enc(hcon, key->ediv, key->rand, key->val);
hcon->enc_key_size = key->enc_size;
return 1;
@ -819,13 +816,19 @@ static int smp_cmd_master_ident(struct l2cap_conn *conn, struct sk_buff *skb)
{
struct smp_cmd_master_ident *rp = (void *) skb->data;
struct smp_chan *smp = conn->smp_chan;
struct hci_dev *hdev = conn->hcon->hdev;
struct hci_conn *hcon = conn->hcon;
u8 authenticated;
skb_pull(skb, sizeof(*rp));
hci_add_ltk(conn->hcon->hdev, 1, conn->dst, smp->enc_key_size,
rp->ediv, rp->rand, smp->tk);
hci_dev_lock(hdev);
authenticated = (conn->hcon->sec_level == BT_SECURITY_HIGH);
hci_add_ltk(conn->hcon->hdev, conn->dst, hcon->dst_type,
HCI_SMP_LTK, 1, authenticated, smp->tk,
smp->enc_key_size, rp->ediv, rp->rand);
smp_distribute_keys(conn, 1);
hci_dev_unlock(hdev);
return 0;
}
@ -935,6 +938,8 @@ int smp_distribute_keys(struct l2cap_conn *conn, __u8 force)
if (*keydist & SMP_DIST_ENC_KEY) {
struct smp_cmd_encrypt_info enc;
struct smp_cmd_master_ident ident;
struct hci_conn *hcon = conn->hcon;
u8 authenticated;
__le16 ediv;
get_random_bytes(enc.ltk, sizeof(enc.ltk));
@ -943,8 +948,11 @@ int smp_distribute_keys(struct l2cap_conn *conn, __u8 force)
smp_send_cmd(conn, SMP_CMD_ENCRYPT_INFO, sizeof(enc), &enc);
hci_add_ltk(conn->hcon->hdev, 1, conn->dst, smp->enc_key_size,
ediv, ident.rand, enc.ltk);
authenticated = hcon->sec_level == BT_SECURITY_HIGH;
hci_add_ltk(conn->hcon->hdev, conn->dst, hcon->dst_type,
HCI_SMP_LTK_SLAVE, 1, authenticated,
enc.ltk, smp->enc_key_size,
ediv, ident.rand);
ident.ediv = cpu_to_le16(ediv);