Bluetooth: Remove dead code from SMP encryption function

The AES cipher is used in ECB mode by SMP and therefore doesn't use an
IV (crypto_blkcipher_ivsize returns 0) so the code trying to set the IV
was never getting called. Simply remove this code to avoid anyone from
thinking it actually makes some difference.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

1 files changed, 1 insertions, 8 deletions

diff --git a/net/bluetooth/smp.c b/net/bluetooth/smp.c
index 3bcb765b6a92..e61e74a1aabb 100644
--- a/net/bluetooth/smp.c
+++ b/net/bluetooth/smp.c
@@ -53,8 +53,7 @@ static int smp_e(struct crypto_blkcipher *tfm, const u8 *k, u8 *r)
 {
         struct blkcipher_desc desc;
         struct scatterlist sg;
-        int err, iv_len;
-        unsigned char iv[128];
+        int err;
 
         if (tfm == NULL) {
                 BT_ERR("tfm %p", tfm);
@@ -72,12 +71,6 @@ static int smp_e(struct crypto_blkcipher *tfm, const u8 *k, u8 *r)
 
         sg_init_one(&sg, r, 16);
 
-        iv_len = crypto_blkcipher_ivsize(tfm);
-        if (iv_len) {
-                memset(&iv, 0xff, iv_len);
-                crypto_blkcipher_set_iv(tfm, iv, iv_len);
-        }
-
         err = crypto_blkcipher_encrypt(&desc, &sg, &sg, 16);
         if (err)
                 BT_ERR("Encrypt data error %d", err);