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Bluetooth: Use debug keys for SMP when HCI_USE_DEBUG_KEYS is set

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The HCI_USE_DEBUG_KEYS flag is intended to force our side to always use
debug keys for pairing. This means both BR/EDR SSP as well as SMP with
LE Secure Connections. This patch updates the SMP code to use the debug
keys instead of generating a random local key pair when the flag is set.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Johan Hedberg 2014-06-24 15:22:59 +03:00 • committed by Marcel Holtmann
parent 1408bb6efb
commit 70157ef539
1 changed files with 18 additions and 9 deletions
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27
net/bluetooth/smp.c
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@ -1585,18 +1585,27 @@ static u8 smp_cmd_pairing_req(struct l2cap_conn *conn, struct sk_buff *skb)
static u8 sc_send_public_key(struct smp_chan *smp) static u8 sc_send_public_key(struct smp_chan *smp)
{ {
struct hci_dev *hdev = smp->conn->hcon->hdev;
BT_DBG(""); BT_DBG("");
while (true) { if (test_bit(HCI_USE_DEBUG_KEYS, &hdev->dev_flags)) {
/* Generate local key pair for Secure Connections */ BT_DBG("Using debug keys");
if (!ecc_make_key(smp->local_pk, smp->local_sk)) memcpy(smp->local_pk, debug_pk, 64);
return SMP_UNSPECIFIED; memcpy(smp->local_sk, debug_sk, 32);
set_bit(SMP_FLAG_DEBUG_KEY, &smp->flags);
} else {
while (true) {
/* Generate local key pair for Secure Connections */
if (!ecc_make_key(smp->local_pk, smp->local_sk))
return SMP_UNSPECIFIED;
/* This is unlikely, but we need to check that we didn't /* This is unlikely, but we need to check that
* accidentially generate a debug key. * we didn't accidentially generate a debug key.
*/ */
if (memcmp(smp->local_sk, debug_sk, 32)) if (memcmp(smp->local_sk, debug_sk, 32))
break; break;
}
} }
BT_DBG("Local Public Key X: %32phN", smp->local_pk); BT_DBG("Local Public Key X: %32phN", smp->local_pk);