Bluetooth: Fix ignoring unknown SMP authentication requirement bits
The SMP specification states that we should ignore any unknown bits from the authentication requirement. We already have a define for masking out unknown bits but we haven't used it in all places so far. This patch adds usage of the AUTH_REQ_MASK to all places that need it and ensures that we don't pass unknown bits onward to other functions. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
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@ -949,8 +949,11 @@ static u8 smp_cmd_pairing_req(struct l2cap_conn *conn, struct sk_buff *skb)
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if (!smp)
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return SMP_UNSPECIFIED;
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/* We didn't start the pairing, so match remote */
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auth = req->auth_req & AUTH_REQ_MASK;
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if (!test_bit(HCI_BONDABLE, &hdev->dev_flags) &&
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(req->auth_req & SMP_AUTH_BONDING))
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(auth & SMP_AUTH_BONDING))
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return SMP_PAIRING_NOTSUPP;
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SMP_DISALLOW_CMD(smp, SMP_CMD_PAIRING_REQ);
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@ -959,9 +962,6 @@ static u8 smp_cmd_pairing_req(struct l2cap_conn *conn, struct sk_buff *skb)
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memcpy(&smp->preq[1], req, sizeof(*req));
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skb_pull(skb, sizeof(*req));
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/* We didn't start the pairing, so match remote */
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auth = req->auth_req;
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sec_level = authreq_to_seclevel(auth);
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if (sec_level > conn->hcon->pending_sec_level)
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conn->hcon->pending_sec_level = sec_level;
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@ -1024,6 +1024,8 @@ static u8 smp_cmd_pairing_rsp(struct l2cap_conn *conn, struct sk_buff *skb)
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if (check_enc_key_size(conn, key_size))
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return SMP_ENC_KEY_SIZE;
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auth = rsp->auth_req & AUTH_REQ_MASK;
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/* If we need MITM check that it can be acheived */
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if (conn->hcon->pending_sec_level >= BT_SECURITY_HIGH) {
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u8 method;
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@ -1044,7 +1046,7 @@ static u8 smp_cmd_pairing_rsp(struct l2cap_conn *conn, struct sk_buff *skb)
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*/
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smp->remote_key_dist &= rsp->resp_key_dist;
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auth = (req->auth_req | rsp->auth_req);
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auth |= req->auth_req;
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ret = tk_request(conn, 0, auth, req->io_capability, rsp->io_capability);
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if (ret)
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@ -1160,7 +1162,7 @@ static u8 smp_cmd_security_req(struct l2cap_conn *conn, struct sk_buff *skb)
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struct smp_cmd_pairing cp;
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struct hci_conn *hcon = conn->hcon;
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struct smp_chan *smp;
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u8 sec_level;
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u8 sec_level, auth;
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BT_DBG("conn %p", conn);
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@ -1170,7 +1172,9 @@ static u8 smp_cmd_security_req(struct l2cap_conn *conn, struct sk_buff *skb)
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if (hcon->role != HCI_ROLE_MASTER)
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return SMP_CMD_NOTSUPP;
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sec_level = authreq_to_seclevel(rp->auth_req);
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auth = rp->auth_req & AUTH_REQ_MASK;
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sec_level = authreq_to_seclevel(auth);
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if (smp_sufficient_security(hcon, sec_level))
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return 0;
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@ -1185,13 +1189,13 @@ static u8 smp_cmd_security_req(struct l2cap_conn *conn, struct sk_buff *skb)
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return SMP_UNSPECIFIED;
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if (!test_bit(HCI_BONDABLE, &hcon->hdev->dev_flags) &&
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(rp->auth_req & SMP_AUTH_BONDING))
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(auth & SMP_AUTH_BONDING))
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return SMP_PAIRING_NOTSUPP;
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skb_pull(skb, sizeof(*rp));
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memset(&cp, 0, sizeof(cp));
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build_pairing_cmd(conn, &cp, NULL, rp->auth_req);
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build_pairing_cmd(conn, &cp, NULL, auth);
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smp->preq[0] = SMP_CMD_PAIRING_REQ;
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memcpy(&smp->preq[1], &cp, sizeof(cp));
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