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[17/20] Bluetooth: use crypto_shash_tfm_digest()

Message ID 20200502053122.995648-18-ebiggers@kernel.org
State New
Headers show
Series crypto: introduce crypto_shash_tfm_digest() | expand

Commit Message

Eric Biggers May 2, 2020, 5:31 a.m. UTC 
From: Eric Biggers <ebiggers@google.com>

Instead of manually allocating a 'struct shash_desc' on the stack and
calling crypto_shash_digest(), switch to using the new helper function
crypto_shash_tfm_digest() which does this for us.

Cc: linux-bluetooth@vger.kernel.org
Signed-off-by: Eric Biggers <ebiggers@google.com>
---
 net/bluetooth/smp.c | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)
diff mbox series

Patch

diff --git a/net/bluetooth/smp.c b/net/bluetooth/smp.c
index 1476a91ce93572..d022f126eb026b 100644
--- a/net/bluetooth/smp.c
+++ b/net/bluetooth/smp.c
@@ -170,7 +170,6 @@  static int aes_cmac(struct crypto_shash *tfm, const u8 k[16], const u8 *m,
 		    size_t len, u8 mac[16])
 {
 	uint8_t tmp[16], mac_msb[16], msg_msb[CMAC_MSG_MAX];
-	SHASH_DESC_ON_STACK(desc, tfm);
 	int err;
 
 	if (len > CMAC_MSG_MAX)
@@ -181,8 +180,6 @@  static int aes_cmac(struct crypto_shash *tfm, const u8 k[16], const u8 *m,
 		return -EINVAL;
 	}
 
-	desc->tfm = tfm;
-
 	/* Swap key and message from LSB to MSB */
 	swap_buf(k, tmp, 16);
 	swap_buf(m, msg_msb, len);
@@ -196,8 +193,7 @@  static int aes_cmac(struct crypto_shash *tfm, const u8 k[16], const u8 *m,
 		return err;
 	}
 
-	err = crypto_shash_digest(desc, msg_msb, len, mac_msb);
-	shash_desc_zero(desc);
+	err = crypto_shash_tfm_digest(tfm, msg_msb, len, mac_msb);
 	if (err) {
 		BT_ERR("Hash computation error %d", err);
 		return err;