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bluetooth: host: smp: unauth bond overwrite on different identity

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Added a new Kconfig option for the Bluetooth Host to allow
unauthenticated pairing attempts made by the peer where an
unauthenticated bond already exists on other local identity.

Signed-off-by: Kamil Piszczek <Kamil.Piszczek@nordicsemi.no>
This commit is contained in:
Kamil Piszczek 2022-11-29 14:57:30 +01:00 • committed by Carles Cufí
commit 916e02563c
2 changed files with 15 additions and 1 deletions
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11
subsys/bluetooth/host/Kconfig
View file

@ -501,6 +501,17 @@ config BT_ID_UNPAIR_MATCHING_BONDS
link-layer. The Host does not have control over this acknowledgment, link-layer. The Host does not have control over this acknowledgment,
and the order of distribution is fixed by the specification. and the order of distribution is fixed by the specification.
config BT_ID_ALLOW_UNAUTH_OVERWRITE
bool "Allow unauthenticated pairing with same peer with other local identity"
depends on !BT_SMP_ALLOW_UNAUTH_OVERWRITE
help
This option allows unauthenticated pairing attempts made by the
peer where an unauthenticated bond already exists on other local
identity. This configuration still blocks unauthenticated pairing
attempts on the same local identity. To allow the pairing procedure
unconditionally, please see the BT_SMP_ALLOW_UNAUTH_OVERWRITE
configuration.
config BT_SMP_USB_HCI_CTLR_WORKAROUND config BT_SMP_USB_HCI_CTLR_WORKAROUND
bool "Workaround for USB HCI controller out-of-order events" bool "Workaround for USB HCI controller out-of-order events"
depends on BT_TESTING depends on BT_TESTING

5
subsys/bluetooth/host/smp.c
View file

@ -565,7 +565,10 @@ static bool update_keys_check(struct bt_smp *smp, struct bt_keys *keys)
if (!IS_ENABLED(CONFIG_BT_SMP_ALLOW_UNAUTH_OVERWRITE) && if (!IS_ENABLED(CONFIG_BT_SMP_ALLOW_UNAUTH_OVERWRITE) &&
(!(keys->flags & BT_KEYS_AUTHENTICATED) (!(keys->flags & BT_KEYS_AUTHENTICATED)
&& smp->method == JUST_WORKS)) { && smp->method == JUST_WORKS)) {
return false; if (!IS_ENABLED(CONFIG_BT_ID_ALLOW_UNAUTH_OVERWRITE) ||
(keys->id == smp->chan.chan.conn->id)) {
return false;
}
} }
return true; return true;