Hi Dmitry,
* Andrei Emeltchenko <Andrei.Emeltchenko.news@xxxxxxxxx> [2012-07-24 16:21:54 +0300]:
> From: Dmitry Kasatkin <dmitry.kasatkin@xxxxxxxxx>
>
> hmac(sha256) will be used for AMP key generation.
>
> Signed-off-by: Dmitry Kasatkin <dmitry.kasatkin@xxxxxxxxx>
> Signed-off-by: Andrei Emeltchenko <andrei.emeltchenko@xxxxxxxxx>
> ---
> net/bluetooth/pal.c | 35 +++++++++++++++++++++++++++++++++++
> 1 file changed, 35 insertions(+)
>
> diff --git a/net/bluetooth/pal.c b/net/bluetooth/pal.c
> index 335cbc3..a405e88 100644
> --- a/net/bluetooth/pal.c
> +++ b/net/bluetooth/pal.c
> @@ -12,6 +12,7 @@
> */
>
> #include <net/bluetooth/pal.h>
> +#include <crypto/hash.h>
>
> enum pal_states {
> DISCONNECTED,
> @@ -220,3 +221,37 @@ struct phy_link *phylink_lookup(struct amp_mgr *mgr, u8 local_id, u8 remote_id)
>
> return found;
> }
> +
> +int hmac_sha256(u8 *key, u8 ksize, char *plaintext, u8 psize, u8 *output)
> +{
> + int ret = 0;
> + struct crypto_shash *tfm;
> +
> + tfm = crypto_alloc_shash("hmac(sha256)", 0, 0);
> + if (IS_ERR(tfm)) {
> + BT_DBG("crypto_alloc_ahash failed");
> + return PTR_ERR(tfm);
> + }
> +
> + if (ksize) {
can you move the check for ksize to the beginning of the function? This avoid
unnecessary calls to crypto_alloc_ahash() in case ksize is zero.
Gustavo
--
To unsubscribe from this list: send the line "unsubscribe linux-bluetooth" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
