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Diffstat (limited to 'net/bluetooth/smp.c')
-rw-r--r--net/bluetooth/smp.c56
1 files changed, 23 insertions, 33 deletions
diff --git a/net/bluetooth/smp.c b/net/bluetooth/smp.c
index 4b07acb8293c..45007362683b 100644
--- a/net/bluetooth/smp.c
+++ b/net/bluetooth/smp.c
@@ -53,8 +53,7 @@ static int smp_e(struct crypto_blkcipher *tfm, const u8 *k, u8 *r)
{
struct blkcipher_desc desc;
struct scatterlist sg;
- int err, iv_len;
- unsigned char iv[128];
+ int err;
if (tfm == NULL) {
BT_ERR("tfm %p", tfm);
@@ -72,12 +71,6 @@ static int smp_e(struct crypto_blkcipher *tfm, const u8 *k, u8 *r)
sg_init_one(&sg, r, 16);
- iv_len = crypto_blkcipher_ivsize(tfm);
- if (iv_len) {
- memset(&iv, 0xff, iv_len);
- crypto_blkcipher_set_iv(tfm, iv, iv_len);
- }
-
err = crypto_blkcipher_encrypt(&desc, &sg, &sg, 16);
if (err)
BT_ERR("Encrypt data error %d", err);
@@ -143,13 +136,6 @@ static int smp_s1(struct crypto_blkcipher *tfm, u8 k[16], u8 r1[16],
return err;
}
-static int smp_rand(u8 *buf)
-{
- get_random_bytes(buf, 16);
-
- return 0;
-}
-
static struct sk_buff *smp_build_cmd(struct l2cap_conn *conn, u8 code,
u16 dlen, void *data)
{
@@ -257,11 +243,11 @@ static u8 check_enc_key_size(struct l2cap_conn *conn, __u8 max_key_size)
return 0;
}
-static void smp_failure(struct l2cap_conn *conn, u8 reason, u8 send)
+static void smp_failure(struct l2cap_conn *conn, u8 reason)
{
struct hci_conn *hcon = conn->hcon;
- if (send)
+ if (reason)
smp_send_cmd(conn, SMP_CMD_PAIRING_FAIL, sizeof(reason),
&reason);
@@ -406,7 +392,7 @@ static void confirm_work(struct work_struct *work)
return;
error:
- smp_failure(conn, reason, 1);
+ smp_failure(conn, reason);
}
static void random_work(struct work_struct *work)
@@ -490,7 +476,7 @@ static void random_work(struct work_struct *work)
return;
error:
- smp_failure(conn, reason, 1);
+ smp_failure(conn, reason);
}
static struct smp_chan *smp_chan_create(struct l2cap_conn *conn)
@@ -555,10 +541,10 @@ int smp_user_confirm_reply(struct hci_conn *hcon, u16 mgmt_op, __le32 passkey)
break;
case MGMT_OP_USER_PASSKEY_NEG_REPLY:
case MGMT_OP_USER_CONFIRM_NEG_REPLY:
- smp_failure(conn, SMP_PASSKEY_ENTRY_FAILED, 1);
+ smp_failure(conn, SMP_PASSKEY_ENTRY_FAILED);
return 0;
default:
- smp_failure(conn, SMP_PASSKEY_ENTRY_FAILED, 1);
+ smp_failure(conn, SMP_PASSKEY_ENTRY_FAILED);
return -EOPNOTSUPP;
}
@@ -606,9 +592,7 @@ static u8 smp_cmd_pairing_req(struct l2cap_conn *conn, struct sk_buff *skb)
if (check_enc_key_size(conn, key_size))
return SMP_ENC_KEY_SIZE;
- ret = smp_rand(smp->prnd);
- if (ret)
- return SMP_UNSPECIFIED;
+ get_random_bytes(smp->prnd, sizeof(smp->prnd));
smp->prsp[0] = SMP_CMD_PAIRING_RSP;
memcpy(&smp->prsp[1], &rsp, sizeof(rsp));
@@ -644,9 +628,7 @@ static u8 smp_cmd_pairing_rsp(struct l2cap_conn *conn, struct sk_buff *skb)
if (check_enc_key_size(conn, key_size))
return SMP_ENC_KEY_SIZE;
- ret = smp_rand(smp->prnd);
- if (ret)
- return SMP_UNSPECIFIED;
+ get_random_bytes(smp->prnd, sizeof(smp->prnd));
smp->prsp[0] = SMP_CMD_PAIRING_RSP;
memcpy(&smp->prsp[1], rsp, sizeof(*rsp));
@@ -768,6 +750,17 @@ static u8 smp_cmd_security_req(struct l2cap_conn *conn, struct sk_buff *skb)
return 0;
}
+bool smp_sufficient_security(struct hci_conn *hcon, u8 sec_level)
+{
+ if (sec_level == BT_SECURITY_LOW)
+ return true;
+
+ if (hcon->sec_level >= sec_level)
+ return true;
+
+ return false;
+}
+
int smp_conn_security(struct hci_conn *hcon, __u8 sec_level)
{
struct l2cap_conn *conn = hcon->l2cap_data;
@@ -779,10 +772,7 @@ int smp_conn_security(struct hci_conn *hcon, __u8 sec_level)
if (!test_bit(HCI_LE_ENABLED, &hcon->hdev->dev_flags))
return 1;
- if (sec_level == BT_SECURITY_LOW)
- return 1;
-
- if (hcon->sec_level >= sec_level)
+ if (smp_sufficient_security(hcon, sec_level))
return 1;
if (hcon->link_mode & HCI_LM_MASTER)
@@ -895,7 +885,7 @@ int smp_sig_channel(struct l2cap_conn *conn, struct sk_buff *skb)
break;
case SMP_CMD_PAIRING_FAIL:
- smp_failure(conn, skb->data[0], 0);
+ smp_failure(conn, 0);
reason = 0;
err = -EPERM;
break;
@@ -941,7 +931,7 @@ int smp_sig_channel(struct l2cap_conn *conn, struct sk_buff *skb)
done:
if (reason)
- smp_failure(conn, reason, 1);
+ smp_failure(conn, reason);
kfree_skb(skb);
return err;