xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

ext4: Use skcipher

Browse Source 
This patch replaces uses of ablkcipher with skcipher.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Herbert Xu
2016-01-24 21:17:38 +08:00
parent 9651ddbac8
commit 3f32a5bee0
4 changed files with 47 additions and 53 deletions
Download Patch File Download Diff File Expand all files Collapse all files

24
fs/ext4/crypto.c
View File

@@ -18,11 +18,9 @@
* Special Publication 800-38E and IEEE P1619/D16.
*/
#include <crypto/hash.h>
#include <crypto/sha.h>
#include <crypto/skcipher.h>
#include <keys/user-type.h>
#include <keys/encrypted-type.h>
#include <linux/crypto.h>
#include <linux/ecryptfs.h>
#include <linux/gfp.h>
#include <linux/kernel.h>
@@ -261,21 +259,21 @@ static int ext4_page_crypto(struct inode *inode,
{
u8 xts_tweak[EXT4_XTS_TWEAK_SIZE];
struct ablkcipher_request *req = NULL;
struct skcipher_request *req = NULL;
DECLARE_EXT4_COMPLETION_RESULT(ecr);
struct scatterlist dst, src;
struct ext4_crypt_info *ci = EXT4_I(inode)->i_crypt_info;
struct crypto_ablkcipher *tfm = ci->ci_ctfm;
struct crypto_skcipher *tfm = ci->ci_ctfm;
int res = 0;
req = ablkcipher_request_alloc(tfm, GFP_NOFS);
req = skcipher_request_alloc(tfm, GFP_NOFS);
if (!req) {
printk_ratelimited(KERN_ERR
"%s: crypto_request_alloc() failed\n",
__func__);
return -ENOMEM;
}
ablkcipher_request_set_callback(
skcipher_request_set_callback(
req, CRYPTO_TFM_REQ_MAY_BACKLOG | CRYPTO_TFM_REQ_MAY_SLEEP,
ext4_crypt_complete, &ecr);
@@ -288,21 +286,21 @@ static int ext4_page_crypto(struct inode *inode,
sg_set_page(&dst, dest_page, PAGE_CACHE_SIZE, 0);
sg_init_table(&src, 1);
sg_set_page(&src, src_page, PAGE_CACHE_SIZE, 0);
ablkcipher_request_set_crypt(req, &src, &dst, PAGE_CACHE_SIZE,
xts_tweak);
skcipher_request_set_crypt(req, &src, &dst, PAGE_CACHE_SIZE,
xts_tweak);
if (rw == EXT4_DECRYPT)
res = crypto_ablkcipher_decrypt(req);
res = crypto_skcipher_decrypt(req);
else
res = crypto_ablkcipher_encrypt(req);
res = crypto_skcipher_encrypt(req);
if (res == -EINPROGRESS || res == -EBUSY) {
wait_for_completion(&ecr.completion);
res = ecr.res;
}
ablkcipher_request_free(req);
skcipher_request_free(req);
if (res) {
printk_ratelimited(
KERN_ERR
"%s: crypto_ablkcipher_encrypt() returned %d\n",
"%s: crypto_skcipher_encrypt() returned %d\n",
__func__, res);
return res;
}