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Date: Sun, 24 Jan 2016 21:17:17 +0800
From: Herbert Xu <herbert@...dor.apana.org.au>
To: Linux Crypto Mailing List <linux-crypto@...r.kernel.org>,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
netdev@...r.kernel.org, devel@...verdev.osuosl.org,
dm-devel@...hat.com, linux-wireless@...r.kernel.org,
linux-cifs@...r.kernel.org, ecryptfs@...r.kernel.org,
linux-ext4@...r.kernel.org, linux-f2fs-devel@...ts.sourceforge.net,
linux-nfs@...r.kernel.org, keyrings@...r.kernel.org,
linux-bluetooth@...r.kernel.org, ceph-devel@...r.kernel.org,
linux-wpan@...r.kernel.org, linux-afs@...ts.infradead.org,
drbd-dev@...ts.linbit.com, open-iscsi@...glegroups.com
Subject: [PATCH 8/26] cifs: Use skcipher
This patch replaces uses of blkcipher with skcipher.
Signed-off-by: Herbert Xu <herbert@...dor.apana.org.au>
---
fs/cifs/cifsencrypt.c | 32 +++++++++++++++++++++-----------
fs/cifs/smbencrypt.c | 26 +++++++++++++++++++-------
2 files changed, 40 insertions(+), 18 deletions(-)
diff --git a/fs/cifs/cifsencrypt.c b/fs/cifs/cifsencrypt.c
index afa09fc..d411654 100644
--- a/fs/cifs/cifsencrypt.c
+++ b/fs/cifs/cifsencrypt.c
@@ -33,6 +33,7 @@
#include <linux/ctype.h>
#include <linux/random.h>
#include <linux/highmem.h>
+#include <crypto/skcipher.h>
static int
cifs_crypto_shash_md5_allocate(struct TCP_Server_Info *server)
@@ -789,38 +790,46 @@ int
calc_seckey(struct cifs_ses *ses)
{
int rc;
- struct crypto_blkcipher *tfm_arc4;
+ struct crypto_skcipher *tfm_arc4;
struct scatterlist sgin, sgout;
- struct blkcipher_desc desc;
+ struct skcipher_request *req;
unsigned char sec_key[CIFS_SESS_KEY_SIZE]; /* a nonce */
get_random_bytes(sec_key, CIFS_SESS_KEY_SIZE);
- tfm_arc4 = crypto_alloc_blkcipher("ecb(arc4)", 0, CRYPTO_ALG_ASYNC);
+ tfm_arc4 = crypto_alloc_skcipher("ecb(arc4)", 0, CRYPTO_ALG_ASYNC);
if (IS_ERR(tfm_arc4)) {
rc = PTR_ERR(tfm_arc4);
cifs_dbg(VFS, "could not allocate crypto API arc4\n");
return rc;
}
- desc.tfm = tfm_arc4;
-
- rc = crypto_blkcipher_setkey(tfm_arc4, ses->auth_key.response,
+ rc = crypto_skcipher_setkey(tfm_arc4, ses->auth_key.response,
CIFS_SESS_KEY_SIZE);
if (rc) {
cifs_dbg(VFS, "%s: Could not set response as a key\n",
__func__);
- return rc;
+ goto out_free_cipher;
+ }
+
+ req = skcipher_request_alloc(tfm_arc4, GFP_KERNEL);
+ if (!req) {
+ rc = -ENOMEM;
+ cifs_dbg(VFS, "could not allocate crypto API arc4 request\n");
+ goto out_free_cipher;
}
sg_init_one(&sgin, sec_key, CIFS_SESS_KEY_SIZE);
sg_init_one(&sgout, ses->ntlmssp->ciphertext, CIFS_CPHTXT_SIZE);
- rc = crypto_blkcipher_encrypt(&desc, &sgout, &sgin, CIFS_CPHTXT_SIZE);
+ skcipher_request_set_callback(req, 0, NULL, NULL);
+ skcipher_request_set_crypt(req, &sgin, &sgout, CIFS_CPHTXT_SIZE, NULL);
+
+ rc = crypto_skcipher_encrypt(req);
+ skcipher_request_free(req);
if (rc) {
cifs_dbg(VFS, "could not encrypt session key rc: %d\n", rc);
- crypto_free_blkcipher(tfm_arc4);
- return rc;
+ goto out_free_cipher;
}
/* make secondary_key/nonce as session key */
@@ -828,7 +837,8 @@ calc_seckey(struct cifs_ses *ses)
/* and make len as that of session key only */
ses->auth_key.len = CIFS_SESS_KEY_SIZE;
- crypto_free_blkcipher(tfm_arc4);
+out_free_cipher:
+ crypto_free_skcipher(tfm_arc4);
return rc;
}
diff --git a/fs/cifs/smbencrypt.c b/fs/cifs/smbencrypt.c
index a4232ec..699b786 100644
--- a/fs/cifs/smbencrypt.c
+++ b/fs/cifs/smbencrypt.c
@@ -23,6 +23,7 @@
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
+#include <crypto/skcipher.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/fs.h>
@@ -70,31 +71,42 @@ smbhash(unsigned char *out, const unsigned char *in, unsigned char *key)
{
int rc;
unsigned char key2[8];
- struct crypto_blkcipher *tfm_des;
+ struct crypto_skcipher *tfm_des;
struct scatterlist sgin, sgout;
- struct blkcipher_desc desc;
+ struct skcipher_request *req;
str_to_key(key, key2);
- tfm_des = crypto_alloc_blkcipher("ecb(des)", 0, CRYPTO_ALG_ASYNC);
+ tfm_des = crypto_alloc_skcipher("ecb(des)", 0, CRYPTO_ALG_ASYNC);
if (IS_ERR(tfm_des)) {
rc = PTR_ERR(tfm_des);
cifs_dbg(VFS, "could not allocate des crypto API\n");
goto smbhash_err;
}
- desc.tfm = tfm_des;
+ req = skcipher_request_alloc(tfm_des, GFP_KERNEL);
+ if (!req) {
+ rc = -ENOMEM;
+ cifs_dbg(VFS, "could not allocate des crypto API\n");
+ goto smbhash_free_skcipher;
+ }
- crypto_blkcipher_setkey(tfm_des, key2, 8);
+ crypto_skcipher_setkey(tfm_des, key2, 8);
sg_init_one(&sgin, in, 8);
sg_init_one(&sgout, out, 8);
- rc = crypto_blkcipher_encrypt(&desc, &sgout, &sgin, 8);
+ skcipher_request_set_callback(req, 0, NULL, NULL);
+ skcipher_request_set_crypt(req, &sgin, &sgout, 8, NULL);
+
+ rc = crypto_skcipher_encrypt(req);
if (rc)
cifs_dbg(VFS, "could not encrypt crypt key rc: %d\n", rc);
- crypto_free_blkcipher(tfm_des);
+ skcipher_request_free(req);
+
+smbhash_free_skcipher:
+ crypto_free_skcipher(tfm_des);
smbhash_err:
return rc;
}
--
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