From 96953718623eb7ee8839ae667dfecad7b257d400 Mon Sep 17 00:00:00 2001
From: Herbert Xu <herbert@gondor.apana.org.au>
Date: Sun, 24 Jan 2016 21:18:50 +0800
Subject: [PATCH] mac802154: Use skcipher

This patch replaces uses of blkcipher with skcipher.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Reviewed-by: Stefan Schmidt <stefan@osg.samsung.com>
---
 net/mac802154/llsec.c | 41 +++++++++++++++++++++++------------------
 net/mac802154/llsec.h |  3 +--
 2 files changed, 24 insertions(+), 20 deletions(-)

diff --git a/net/mac802154/llsec.c b/net/mac802154/llsec.c
index a13d02b7cee4..6a3e1c2181d3 100644
--- a/net/mac802154/llsec.c
+++ b/net/mac802154/llsec.c
@@ -17,9 +17,9 @@
 #include <linux/err.h>
 #include <linux/bug.h>
 #include <linux/completion.h>
-#include <linux/crypto.h>
 #include <linux/ieee802154.h>
 #include <crypto/aead.h>
+#include <crypto/skcipher.h>
 
 #include "ieee802154_i.h"
 #include "llsec.h"
@@ -144,18 +144,18 @@ llsec_key_alloc(const struct ieee802154_llsec_key *template)
 			goto err_tfm;
 	}
 
-	key->tfm0 = crypto_alloc_blkcipher("ctr(aes)", 0, CRYPTO_ALG_ASYNC);
+	key->tfm0 = crypto_alloc_skcipher("ctr(aes)", 0, CRYPTO_ALG_ASYNC);
 	if (IS_ERR(key->tfm0))
 		goto err_tfm;
 
-	if (crypto_blkcipher_setkey(key->tfm0, template->key,
-				    IEEE802154_LLSEC_KEY_SIZE))
+	if (crypto_skcipher_setkey(key->tfm0, template->key,
+				   IEEE802154_LLSEC_KEY_SIZE))
 		goto err_tfm0;
 
 	return key;
 
 err_tfm0:
-	crypto_free_blkcipher(key->tfm0);
+	crypto_free_skcipher(key->tfm0);
 err_tfm:
 	for (i = 0; i < ARRAY_SIZE(key->tfm); i++)
 		if (key->tfm[i])
@@ -175,7 +175,7 @@ static void llsec_key_release(struct kref *ref)
 	for (i = 0; i < ARRAY_SIZE(key->tfm); i++)
 		crypto_free_aead(key->tfm[i]);
 
-	crypto_free_blkcipher(key->tfm0);
+	crypto_free_skcipher(key->tfm0);
 	kzfree(key);
 }
 
@@ -620,15 +620,17 @@ llsec_do_encrypt_unauth(struct sk_buff *skb, const struct mac802154_llsec *sec,
 {
 	u8 iv[16];
 	struct scatterlist src;
-	struct blkcipher_desc req = {
-		.tfm = key->tfm0,
-		.info = iv,
-		.flags = 0,
-	};
+	SKCIPHER_REQUEST_ON_STACK(req, key->tfm0);
+	int err;
 
 	llsec_geniv(iv, sec->params.hwaddr, &hdr->sec);
 	sg_init_one(&src, skb->data, skb->len);
-	return crypto_blkcipher_encrypt_iv(&req, &src, &src, skb->len);
+	skcipher_request_set_tfm(req, key->tfm0);
+	skcipher_request_set_callback(req, 0, NULL, NULL);
+	skcipher_request_set_crypt(req, &src, &src, skb->len, iv);
+	err = crypto_skcipher_encrypt(req);
+	skcipher_request_zero(req);
+	return err;
 }
 
 static struct crypto_aead*
@@ -830,11 +832,8 @@ llsec_do_decrypt_unauth(struct sk_buff *skb, const struct mac802154_llsec *sec,
 	unsigned char *data;
 	int datalen;
 	struct scatterlist src;
-	struct blkcipher_desc req = {
-		.tfm = key->tfm0,
-		.info = iv,
-		.flags = 0,
-	};
+	SKCIPHER_REQUEST_ON_STACK(req, key->tfm0);
+	int err;
 
 	llsec_geniv(iv, dev_addr, &hdr->sec);
 	data = skb_mac_header(skb) + skb->mac_len;
@@ -842,7 +841,13 @@ llsec_do_decrypt_unauth(struct sk_buff *skb, const struct mac802154_llsec *sec,
 
 	sg_init_one(&src, data, datalen);
 
-	return crypto_blkcipher_decrypt_iv(&req, &src, &src, datalen);
+	skcipher_request_set_tfm(req, key->tfm0);
+	skcipher_request_set_callback(req, 0, NULL, NULL);
+	skcipher_request_set_crypt(req, &src, &src, datalen, iv);
+
+	err = crypto_skcipher_decrypt(req);
+	skcipher_request_zero(req);
+	return err;
 }
 
 static int
diff --git a/net/mac802154/llsec.h b/net/mac802154/llsec.h
index 950578e1d7be..6f3b658e3279 100644
--- a/net/mac802154/llsec.h
+++ b/net/mac802154/llsec.h
@@ -19,7 +19,6 @@
 
 #include <linux/slab.h>
 #include <linux/hashtable.h>
-#include <linux/crypto.h>
 #include <linux/kref.h>
 #include <linux/spinlock.h>
 #include <net/af_ieee802154.h>
@@ -30,7 +29,7 @@ struct mac802154_llsec_key {
 
 	/* one tfm for each authsize (4/8/16) */
 	struct crypto_aead *tfm[3];
-	struct crypto_blkcipher *tfm0;
+	struct crypto_skcipher *tfm0;
 
 	struct kref ref;
 };