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authorJohan Hedberg <johan.hedberg@intel.com>2012-10-11 16:26:06 +0200
committerGustavo Padovan <gustavo.padovan@collabora.co.uk>2012-10-12 17:55:20 +0800
commit065a13e2cc665f6547dc7e8a9d6b6565badf940a (patch)
tree5c115c05826940ad19a77a1c211792413105fc98 /net
parenta7be50b7e30f9d77cb059a7ffdb781bb0fb92eba (diff)
downloadvexpress-lsk-065a13e2cc665f6547dc7e8a9d6b6565badf940a.tar.gz
Bluetooth: SMP: Fix setting unknown auth_req bits
When sending a pairing request or response we should not just blindly copy the value that the remote device sent. Instead we should at least make sure to mask out any unknown bits. This is particularly critical from the upcoming LE Secure Connections feature perspective as incorrectly indicating support for it (by copying the remote value) would cause a failure to pair with devices that support it. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Cc: stable@kernel.org Acked-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Diffstat (limited to 'net')
-rw-r--r--net/bluetooth/smp.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/net/bluetooth/smp.c b/net/bluetooth/smp.c
index 8c225ef349c..2ac8d50861e 100644
--- a/net/bluetooth/smp.c
+++ b/net/bluetooth/smp.c
@@ -32,6 +32,8 @@
#define SMP_TIMEOUT msecs_to_jiffies(30000)
+#define AUTH_REQ_MASK 0x07
+
static inline void swap128(u8 src[16], u8 dst[16])
{
int i;
@@ -230,7 +232,7 @@ static void build_pairing_cmd(struct l2cap_conn *conn,
req->max_key_size = SMP_MAX_ENC_KEY_SIZE;
req->init_key_dist = 0;
req->resp_key_dist = dist_keys;
- req->auth_req = authreq;
+ req->auth_req = (authreq & AUTH_REQ_MASK);
return;
}
@@ -239,7 +241,7 @@ static void build_pairing_cmd(struct l2cap_conn *conn,
rsp->max_key_size = SMP_MAX_ENC_KEY_SIZE;
rsp->init_key_dist = 0;
rsp->resp_key_dist = req->resp_key_dist & dist_keys;
- rsp->auth_req = authreq;
+ rsp->auth_req = (authreq & AUTH_REQ_MASK);
}
static u8 check_enc_key_size(struct l2cap_conn *conn, __u8 max_key_size)