diff options
| author | Luiz Augusto von Dentz <luiz.von.dentz@intel.com> | 2021-03-10 14:13:08 -0800 |
|---|---|---|
| committer | Marcel Holtmann <marcel@holtmann.org> | 2021-03-11 11:45:51 +0100 |
| commit | 6d19628f539fccf899298ff02ee4c73e4bf6df3f (patch) | |
| tree | 5567ed750cf53ec71683c21a430e51c448b4956b | |
| parent | d00745da644d42c2f97293eb3fe19cfd5c0b073c (diff) | |
Bluetooth: SMP: Fail if remote and local public keys are identical
This fails the pairing procedure when both remote and local non-debug
public keys are identical.
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
| -rw-r--r-- | net/bluetooth/smp.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/net/bluetooth/smp.c b/net/bluetooth/smp.c index b0c1ee110eff..e03cc284161c 100644 --- a/net/bluetooth/smp.c +++ b/net/bluetooth/smp.c @@ -2732,6 +2732,15 @@ static int smp_cmd_public_key(struct l2cap_conn *conn, struct sk_buff *skb) if (skb->len < sizeof(*key)) return SMP_INVALID_PARAMS; + /* Check if remote and local public keys are the same and debug key is + * not in use. + */ + if (!test_bit(SMP_FLAG_DEBUG_KEY, &smp->flags) && + !crypto_memneq(key, smp->local_pk, 64)) { + bt_dev_err(hdev, "Remote and local public keys are identical"); + return SMP_UNSPECIFIED; + } + memcpy(smp->remote_pk, key, 64); if (test_bit(SMP_FLAG_REMOTE_OOB, &smp->flags)) { |