Bluetooth: Add mgmt support for LE Secure Connections LTK types

We need a dedicated LTK type for LTK resulting from a Secure Connections
based SMP pairing. This patch adds a new define for it and ensures that
both the New LTK event as well as the Load LTKs command supports it.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

diff --git a/include/net/bluetooth/mgmt.h b/include/net/bluetooth/mgmt.h
index b391fd6..9b382ea 100644 (file)
--- a/include/net/bluetooth/mgmt.h
+++ b/include/net/bluetooth/mgmt.h
@@ -184,6 +184,9 @@ struct mgmt_cp_load_link_keys {
 
 #define MGMT_LTK_UNAUTHENTICATED       0x00
 #define MGMT_LTK_AUTHENTICATED         0x01
+#define MGMT_LTK_P256_UNAUTH           0x02
+#define MGMT_LTK_P256_AUTH             0x03
+#define MGMT_LTK_P256_DEBUG            0x04
 
 struct mgmt_ltk_info {
        struct mgmt_addr_info addr;

diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index cbeef5f..7974a39 100644 (file)
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -4910,18 +4910,26 @@ static int load_long_term_keys(struct sock *sk, struct hci_dev *hdev,
                else
                        addr_type = ADDR_LE_DEV_RANDOM;
 
-               if (key->master)
-                       type = SMP_LTK;
-               else
-                       type = SMP_LTK_SLAVE;
-
                switch (key->type) {
                case MGMT_LTK_UNAUTHENTICATED:
                        authenticated = 0x00;
+                       type = key->master ? SMP_LTK : SMP_LTK_SLAVE;
                        break;
                case MGMT_LTK_AUTHENTICATED:
                        authenticated = 0x01;
+                       type = key->master ? SMP_LTK : SMP_LTK_SLAVE;
+                       break;
+               case MGMT_LTK_P256_UNAUTH:
+                       authenticated = 0x00;
+                       type = SMP_LTK_P256;
+                       break;
+               case MGMT_LTK_P256_AUTH:
+                       authenticated = 0x01;
+                       type = SMP_LTK_P256;
                        break;
+               case MGMT_LTK_P256_DEBUG:
+                       authenticated = 0x00;
+                       type = SMP_LTK_P256_DEBUG;
                default:
                        continue;
                }
@@ -6101,8 +6109,19 @@ void mgmt_new_link_key(struct hci_dev *hdev, struct link_key *key,
 
 static u8 mgmt_ltk_type(struct smp_ltk *ltk)
 {
-       if (ltk->authenticated)
-               return MGMT_LTK_AUTHENTICATED;
+       switch (ltk->type) {
+       case SMP_LTK:
+       case SMP_LTK_SLAVE:
+               if (ltk->authenticated)
+                       return MGMT_LTK_AUTHENTICATED;
+               return MGMT_LTK_UNAUTHENTICATED;
+       case SMP_LTK_P256:
+               if (ltk->authenticated)
+                       return MGMT_LTK_P256_AUTH;
+               return MGMT_LTK_P256_UNAUTH;
+       case SMP_LTK_P256_DEBUG:
+               return MGMT_LTK_P256_DEBUG;
+       }
 
        return MGMT_LTK_UNAUTHENTICATED;
 }

diff --git a/net/bluetooth/smp.h b/net/bluetooth/smp.h
index 7c3c351..81d24c0 100644 (file)
--- a/net/bluetooth/smp.h
+++ b/net/bluetooth/smp.h
@@ -146,8 +146,21 @@ enum {
        SMP_STK,
        SMP_LTK,
        SMP_LTK_SLAVE,
+       SMP_LTK_P256,
+       SMP_LTK_P256_DEBUG,
 };
 
+static inline bool smp_ltk_is_sc(struct smp_ltk *key)
+{
+       switch (key->type) {
+       case SMP_LTK_P256:
+       case SMP_LTK_P256_DEBUG:
+               return true;
+       }
+
+       return false;
+}
+
 static inline u8 smp_ltk_sec_level(struct smp_ltk *key)
 {
        if (key->authenticated)