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Bluetooth: Fix SMP user passkey notification mgmt event 

When performing SMP pairing with MITM protection one side needs to
enter the passkey while the other side displays to the user what needs
to be entered. Nowhere in the SMP specification does it say that the
displaying side needs to any kind of confirmation of the passkey, even
though a code comment in smp.c implies this.

This patch removes the misleading comment and converts the code to use
the passkey notification mgmt event instead of the passkey confirmation
mgmt event.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Johan Hedberg 2014-03-19 14:14:53 +02:00 committed by Marcel Holtmann
parent 5ed884d765
commit 01ad34d267
1 changed files with 3 additions and 2 deletions
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5
net/bluetooth/smp.c
View File

@ -407,13 +407,14 @@ static int tk_request(struct l2cap_conn *conn, u8 remote_oob, u8 auth,
method = REQ_PASSKEY;
}
/* Generate random passkey. Not valid until confirmed. */
/* Generate random passkey. */
if (method == CFM_PASSKEY) {
memset(smp->tk, 0, sizeof(smp->tk));
get_random_bytes(&passkey, sizeof(passkey));
passkey %= 1000000;
put_unaligned_le32(passkey, smp->tk);
BT_DBG("PassKey: %d", passkey);
set_bit(SMP_FLAG_TK_VALID, &smp->smp_flags);
}
hci_dev_lock(hcon->hdev);
@ -422,7 +423,7 @@ static int tk_request(struct l2cap_conn *conn, u8 remote_oob, u8 auth,
ret = mgmt_user_passkey_request(hcon->hdev, &hcon->dst,
hcon->type, hcon->dst_type);
else
ret = mgmt_user_confirm_request(hcon->hdev, &hcon->dst,
ret = mgmt_user_passkey_notify(hcon->hdev, &hcon->dst,
hcon->type, hcon->dst_type,
cpu_to_le32(passkey), 0);