From e7e62c8592484f79469312fc694d2995918aa152 Mon Sep 17 00:00:00 2001 From: Vinicius Costa Gomes Date: Thu, 7 Jul 2011 18:59:40 -0300 Subject: [PATCH] Bluetooth: Use the link key list to temporarily store the STK With this we can use only one place to store all keys, without need to use a field in the connection structure for this purpose. Signed-off-by: Vinicius Costa Gomes Signed-off-by: Gustavo F. Padovan --- net/bluetooth/smp.c | 29 ++++++++++++++++++----------- 1 file changed, 18 insertions(+), 11 deletions(-) diff --git a/net/bluetooth/smp.c b/net/bluetooth/smp.c index 600a70b95a00..6df51017df21 100644 --- a/net/bluetooth/smp.c +++ b/net/bluetooth/smp.c @@ -390,29 +390,36 @@ static u8 smp_cmd_pairing_random(struct l2cap_conn *conn, struct sk_buff *skb) } if (conn->hcon->out) { + u8 stk[16], rand[8]; __le16 ediv; - u8 rand[8]; - - smp_s1(tfm, conn->tk, random, conn->prnd, key); - swap128(key, hcon->ltk); - - memset(hcon->ltk + conn->smp_key_size, 0, - SMP_MAX_ENC_KEY_SIZE - conn->smp_key_size); memset(rand, 0, sizeof(rand)); ediv = 0; - hci_le_start_enc(hcon, ediv, rand, hcon->ltk); + + smp_s1(tfm, conn->tk, random, conn->prnd, key); + swap128(key, stk); + + memset(stk + conn->smp_key_size, 0, + SMP_MAX_ENC_KEY_SIZE - conn->smp_key_size); + + hci_le_start_enc(hcon, ediv, rand, stk); } else { - u8 r[16]; + u8 stk[16], r[16], rand[8]; + __le16 ediv; + + memset(rand, 0, sizeof(rand)); + ediv = 0; swap128(conn->prnd, r); smp_send_cmd(conn, SMP_CMD_PAIRING_RANDOM, sizeof(r), r); smp_s1(tfm, conn->tk, conn->prnd, random, key); - swap128(key, hcon->ltk); + swap128(key, stk); - memset(hcon->ltk + conn->smp_key_size, 0, + memset(stk + conn->smp_key_size, 0, SMP_MAX_ENC_KEY_SIZE - conn->smp_key_size); + + hci_add_ltk(conn->hcon->hdev, 0, conn->dst, ediv, rand, stk); } return 0;