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[16/26] libceph: Use skcipher

Message ID 20160126105455.GA19674@gondor.apana.org.au (mailing list archive)
State Not Applicable, archived
Delegated to: Mike Snitzer
Headers show

Commit Message

Herbert Xu Jan. 26, 2016, 10:54 a.m. UTC 
On Mon, Jan 25, 2016 at 05:18:47PM +0100, Ilya Dryomov wrote:
> 
> Could you get rid of ivsize instead of assigning to it - see the
> attached diff?

How about an incremental patch like this? Thanks!

---8<---
From: Ilya Dryomov <idryomov@gmail.com>
Subject: libceph: Remove unnecessary ivsize variables

This patch removes the unnecessary ivsize variabls as they always
have the value of AES_BLOCK_SIZE.

Signed-off-by: Ilya Dryomov <idryomov@gmail.com>

Comments

Ilya Dryomov Jan. 26, 2016, 11:29 a.m. UTC | #1 
On Tue, Jan 26, 2016 at 11:54 AM, Herbert Xu
<herbert@gondor.apana.org.au> wrote:
> On Mon, Jan 25, 2016 at 05:18:47PM +0100, Ilya Dryomov wrote:
>>
>> Could you get rid of ivsize instead of assigning to it - see the
>> attached diff?
>
> How about an incremental patch like this? Thanks!
>
> ---8<---
> From: Ilya Dryomov <idryomov@gmail.com>
> Subject: libceph: Remove unnecessary ivsize variables
>
> This patch removes the unnecessary ivsize variabls as they always
> have the value of AES_BLOCK_SIZE.
>
> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
>
> diff --git a/net/ceph/crypto.c b/net/ceph/crypto.c
> index fb9cb2b..db2847a 100644
> --- a/net/ceph/crypto.c
> +++ b/net/ceph/crypto.c
> @@ -166,8 +166,7 @@ static int ceph_aes_encrypt(const void *key, int key_len,
>         struct crypto_skcipher *tfm = ceph_crypto_alloc_cipher();
>         SKCIPHER_REQUEST_ON_STACK(req, tfm);
>         int ret;
> -       int ivsize = AES_BLOCK_SIZE;
> -       char iv[ivsize];
> +       char iv[AES_BLOCK_SIZE];
>         size_t zero_padding = (0x10 - (src_len & 0x0f));
>         char pad[16];
>
> @@ -186,7 +185,7 @@ static int ceph_aes_encrypt(const void *key, int key_len,
>                 goto out_tfm;
>
>         crypto_skcipher_setkey((void *)tfm, key, key_len);
> -       memcpy(iv, aes_iv, ivsize);
> +       memcpy(iv, aes_iv, AES_BLOCK_SIZE);
>
>         skcipher_request_set_tfm(req, tfm);
>         skcipher_request_set_callback(req, 0, NULL, NULL);
> @@ -229,8 +228,7 @@ static int ceph_aes_encrypt2(const void *key, int key_len, void *dst,
>         struct crypto_skcipher *tfm = ceph_crypto_alloc_cipher();
>         SKCIPHER_REQUEST_ON_STACK(req, tfm);
>         int ret;
> -       int ivsize = AES_BLOCK_SIZE;
> -       char iv[ivsize];
> +       char iv[AES_BLOCK_SIZE];
>         size_t zero_padding = (0x10 - ((src1_len + src2_len) & 0x0f));
>         char pad[16];
>
> @@ -250,7 +248,7 @@ static int ceph_aes_encrypt2(const void *key, int key_len, void *dst,
>                 goto out_tfm;
>
>         crypto_skcipher_setkey((void *)tfm, key, key_len);
> -       memcpy(iv, aes_iv, ivsize);
> +       memcpy(iv, aes_iv, AES_BLOCK_SIZE);
>
>         skcipher_request_set_tfm(req, tfm);
>         skcipher_request_set_callback(req, 0, NULL, NULL);
> @@ -294,8 +292,7 @@ static int ceph_aes_decrypt(const void *key, int key_len,
>         struct crypto_skcipher *tfm = ceph_crypto_alloc_cipher();
>         SKCIPHER_REQUEST_ON_STACK(req, tfm);
>         char pad[16];
> -       int ivsize = AES_BLOCK_SIZE;
> -       char iv[16];
> +       char iv[AES_BLOCK_SIZE];
>         int ret;
>         int last_byte;
>
> @@ -310,7 +307,7 @@ static int ceph_aes_decrypt(const void *key, int key_len,
>                 goto out_tfm;
>
>         crypto_skcipher_setkey((void *)tfm, key, key_len);
> -       memcpy(iv, aes_iv, ivsize);
> +       memcpy(iv, aes_iv, AES_BLOCK_SIZE);
>
>         skcipher_request_set_tfm(req, tfm);
>         skcipher_request_set_callback(req, 0, NULL, NULL);
> @@ -363,8 +360,7 @@ static int ceph_aes_decrypt2(const void *key, int key_len,
>         struct crypto_skcipher *tfm = ceph_crypto_alloc_cipher();
>         SKCIPHER_REQUEST_ON_STACK(req, tfm);
>         char pad[16];
> -       int ivsize = AES_BLOCK_SIZE;
> -       char iv[ivsize];
> +       char iv[AES_BLOCK_SIZE];
>         int ret;
>         int last_byte;
>
> @@ -380,7 +376,7 @@ static int ceph_aes_decrypt2(const void *key, int key_len,
>                 goto out_tfm;
>
>         crypto_skcipher_setkey((void *)tfm, key, key_len);
> -       memcpy(iv, aes_iv, ivsize);
> +       memcpy(iv, aes_iv, AES_BLOCK_SIZE);
>
>         skcipher_request_set_tfm(req, tfm);
>         skcipher_request_set_callback(req, 0, NULL, NULL);

LGTM.  You want to take it through crypto?

Thanks,

                Ilya

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Herbert Xu Jan. 26, 2016, 11:33 a.m. UTC | #2 
On Tue, Jan 26, 2016 at 12:29:57PM +0100, Ilya Dryomov wrote:
>
> LGTM.  You want to take it through crypto?

That's probably the easiest route since I'd like to take the first
patch through cryptodev.

Thanks,
diff mbox

Patch

diff --git a/net/ceph/crypto.c b/net/ceph/crypto.c
index fb9cb2b..db2847a 100644
--- a/net/ceph/crypto.c
+++ b/net/ceph/crypto.c
@@ -166,8 +166,7 @@  static int ceph_aes_encrypt(const void *key, int key_len,
 	struct crypto_skcipher *tfm = ceph_crypto_alloc_cipher();
 	SKCIPHER_REQUEST_ON_STACK(req, tfm);
 	int ret;
-	int ivsize = AES_BLOCK_SIZE;
-	char iv[ivsize];
+	char iv[AES_BLOCK_SIZE];
 	size_t zero_padding = (0x10 - (src_len & 0x0f));
 	char pad[16];
 
@@ -186,7 +185,7 @@  static int ceph_aes_encrypt(const void *key, int key_len,
 		goto out_tfm;
 
 	crypto_skcipher_setkey((void *)tfm, key, key_len);
-	memcpy(iv, aes_iv, ivsize);
+	memcpy(iv, aes_iv, AES_BLOCK_SIZE);
 
 	skcipher_request_set_tfm(req, tfm);
 	skcipher_request_set_callback(req, 0, NULL, NULL);
@@ -229,8 +228,7 @@  static int ceph_aes_encrypt2(const void *key, int key_len, void *dst,
 	struct crypto_skcipher *tfm = ceph_crypto_alloc_cipher();
 	SKCIPHER_REQUEST_ON_STACK(req, tfm);
 	int ret;
-	int ivsize = AES_BLOCK_SIZE;
-	char iv[ivsize];
+	char iv[AES_BLOCK_SIZE];
 	size_t zero_padding = (0x10 - ((src1_len + src2_len) & 0x0f));
 	char pad[16];
 
@@ -250,7 +248,7 @@  static int ceph_aes_encrypt2(const void *key, int key_len, void *dst,
 		goto out_tfm;
 
 	crypto_skcipher_setkey((void *)tfm, key, key_len);
-	memcpy(iv, aes_iv, ivsize);
+	memcpy(iv, aes_iv, AES_BLOCK_SIZE);
 
 	skcipher_request_set_tfm(req, tfm);
 	skcipher_request_set_callback(req, 0, NULL, NULL);
@@ -294,8 +292,7 @@  static int ceph_aes_decrypt(const void *key, int key_len,
 	struct crypto_skcipher *tfm = ceph_crypto_alloc_cipher();
 	SKCIPHER_REQUEST_ON_STACK(req, tfm);
 	char pad[16];
-	int ivsize = AES_BLOCK_SIZE;
-	char iv[16];
+	char iv[AES_BLOCK_SIZE];
 	int ret;
 	int last_byte;
 
@@ -310,7 +307,7 @@  static int ceph_aes_decrypt(const void *key, int key_len,
 		goto out_tfm;
 
 	crypto_skcipher_setkey((void *)tfm, key, key_len);
-	memcpy(iv, aes_iv, ivsize);
+	memcpy(iv, aes_iv, AES_BLOCK_SIZE);
 
 	skcipher_request_set_tfm(req, tfm);
 	skcipher_request_set_callback(req, 0, NULL, NULL);
@@ -363,8 +360,7 @@  static int ceph_aes_decrypt2(const void *key, int key_len,
 	struct crypto_skcipher *tfm = ceph_crypto_alloc_cipher();
 	SKCIPHER_REQUEST_ON_STACK(req, tfm);
 	char pad[16];
-	int ivsize = AES_BLOCK_SIZE;
-	char iv[ivsize];
+	char iv[AES_BLOCK_SIZE];
 	int ret;
 	int last_byte;
 
@@ -380,7 +376,7 @@  static int ceph_aes_decrypt2(const void *key, int key_len,
 		goto out_tfm;
 
 	crypto_skcipher_setkey((void *)tfm, key, key_len);
-	memcpy(iv, aes_iv, ivsize);
+	memcpy(iv, aes_iv, AES_BLOCK_SIZE);
 
 	skcipher_request_set_tfm(req, tfm);
 	skcipher_request_set_callback(req, 0, NULL, NULL);