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Bluetooth: Add flag to track STK encryption

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There are certain subtle differences in behavior when we're encrypted
with the STK, such as allowing re-encryption even though the security
level stays the same. Because of this, add a flag to track whether we're
encrypted with an STK or not.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Johan Hedberg 2014-07-01 19:14:12 +03:00 • committed by Marcel Holtmann
parent 854f47278f
commit fe59a05f94
3 changed files with 8 additions and 0 deletions
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4
net/bluetooth/smp.c
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@ -538,6 +538,7 @@ static u8 smp_random(struct smp_chan *smp)
hci_le_start_enc(hcon, ediv, rand, stk);
hcon->enc_key_size = smp->enc_key_size;
set_bit(HCI_CONN_STK_ENCRYPT, &hcon->flags);
} else {
u8 stk[16], auth;
__le64 rand = 0;
@ -856,6 +857,9 @@ static bool smp_ltk_encrypt(struct l2cap_conn *conn, u8 sec_level)
hci_le_start_enc(hcon, key->ediv, key->rand, key->val);
hcon->enc_key_size = key->enc_size;
/* We never store STKs for master role, so clear this flag */
clear_bit(HCI_CONN_STK_ENCRYPT, &hcon->flags);
return true;
}