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Diffstat (limited to 'fs/ecryptfs/crypto.c')
-rw-r--r--fs/ecryptfs/crypto.c107
1 files changed, 48 insertions, 59 deletions
diff --git a/fs/ecryptfs/crypto.c b/fs/ecryptfs/crypto.c
index 87dbdd4881ab..64026e53722a 100644
--- a/fs/ecryptfs/crypto.c
+++ b/fs/ecryptfs/crypto.c
@@ -23,6 +23,8 @@
* 02111-1307, USA.
*/
+#include <crypto/hash.h>
+#include <crypto/skcipher.h>
#include <linux/fs.h>
#include <linux/mount.h>
#include <linux/pagemap.h>
@@ -30,7 +32,6 @@
#include <linux/compiler.h>
#include <linux/key.h>
#include <linux/namei.h>
-#include <linux/crypto.h>
#include <linux/file.h>
#include <linux/scatterlist.h>
#include <linux/slab.h>
@@ -74,6 +75,19 @@ void ecryptfs_from_hex(char *dst, char *src, int dst_size)
}
}
+static int ecryptfs_hash_digest(struct crypto_shash *tfm,
+ char *src, int len, char *dst)
+{
+ SHASH_DESC_ON_STACK(desc, tfm);
+ int err;
+
+ desc->tfm = tfm;
+ desc->flags = CRYPTO_TFM_REQ_MAY_SLEEP;
+ err = crypto_shash_digest(desc, src, len, dst);
+ shash_desc_zero(desc);
+ return err;
+}
+
/**
* ecryptfs_calculate_md5 - calculates the md5 of @src
* @dst: Pointer to 16 bytes of allocated memory
@@ -88,45 +102,26 @@ static int ecryptfs_calculate_md5(char *dst,
struct ecryptfs_crypt_stat *crypt_stat,
char *src, int len)
{
- struct scatterlist sg;
- struct hash_desc desc = {
- .tfm = crypt_stat->hash_tfm,
- .flags = CRYPTO_TFM_REQ_MAY_SLEEP
- };
+ struct crypto_shash *tfm;
int rc = 0;
mutex_lock(&crypt_stat->cs_hash_tfm_mutex);
- sg_init_one(&sg, (u8 *)src, len);
- if (!desc.tfm) {
- desc.tfm = crypto_alloc_hash(ECRYPTFS_DEFAULT_HASH, 0,
- CRYPTO_ALG_ASYNC);
- if (IS_ERR(desc.tfm)) {
- rc = PTR_ERR(desc.tfm);
+ tfm = crypt_stat->hash_tfm;
+ if (!tfm) {
+ tfm = crypto_alloc_shash(ECRYPTFS_DEFAULT_HASH, 0, 0);
+ if (IS_ERR(tfm)) {
+ rc = PTR_ERR(tfm);
ecryptfs_printk(KERN_ERR, "Error attempting to "
"allocate crypto context; rc = [%d]\n",
rc);
goto out;
}
- crypt_stat->hash_tfm = desc.tfm;
- }
- rc = crypto_hash_init(&desc);
- if (rc) {
- printk(KERN_ERR
- "%s: Error initializing crypto hash; rc = [%d]\n",
- __func__, rc);
- goto out;
+ crypt_stat->hash_tfm = tfm;
}
- rc = crypto_hash_update(&desc, &sg, len);
+ rc = ecryptfs_hash_digest(tfm, src, len, dst);
if (rc) {
printk(KERN_ERR
- "%s: Error updating crypto hash; rc = [%d]\n",
- __func__, rc);
- goto out;
- }
- rc = crypto_hash_final(&desc, dst);
- if (rc) {
- printk(KERN_ERR
- "%s: Error finalizing crypto hash; rc = [%d]\n",
+ "%s: Error computing crypto hash; rc = [%d]\n",
__func__, rc);
goto out;
}
@@ -234,10 +229,8 @@ void ecryptfs_destroy_crypt_stat(struct ecryptfs_crypt_stat *crypt_stat)
{
struct ecryptfs_key_sig *key_sig, *key_sig_tmp;
- if (crypt_stat->tfm)
- crypto_free_ablkcipher(crypt_stat->tfm);
- if (crypt_stat->hash_tfm)
- crypto_free_hash(crypt_stat->hash_tfm);
+ crypto_free_skcipher(crypt_stat->tfm);
+ crypto_free_shash(crypt_stat->hash_tfm);
list_for_each_entry_safe(key_sig, key_sig_tmp,
&crypt_stat->keysig_list, crypt_stat_list) {
list_del(&key_sig->crypt_stat_list);
@@ -342,7 +335,7 @@ static int crypt_scatterlist(struct ecryptfs_crypt_stat *crypt_stat,
struct scatterlist *src_sg, int size,
unsigned char *iv, int op)
{
- struct ablkcipher_request *req = NULL;
+ struct skcipher_request *req = NULL;
struct extent_crypt_result ecr;
int rc = 0;
@@ -358,20 +351,20 @@ static int crypt_scatterlist(struct ecryptfs_crypt_stat *crypt_stat,
init_completion(&ecr.completion);
mutex_lock(&crypt_stat->cs_tfm_mutex);
- req = ablkcipher_request_alloc(crypt_stat->tfm, GFP_NOFS);
+ req = skcipher_request_alloc(crypt_stat->tfm, GFP_NOFS);
if (!req) {
mutex_unlock(&crypt_stat->cs_tfm_mutex);
rc = -ENOMEM;
goto out;
}
- ablkcipher_request_set_callback(req,
+ skcipher_request_set_callback(req,
CRYPTO_TFM_REQ_MAY_BACKLOG | CRYPTO_TFM_REQ_MAY_SLEEP,
extent_crypt_complete, &ecr);
/* Consider doing this once, when the file is opened */
if (!(crypt_stat->flags & ECRYPTFS_KEY_SET)) {
- rc = crypto_ablkcipher_setkey(crypt_stat->tfm, crypt_stat->key,
- crypt_stat->key_size);
+ rc = crypto_skcipher_setkey(crypt_stat->tfm, crypt_stat->key,
+ crypt_stat->key_size);
if (rc) {
ecryptfs_printk(KERN_ERR,
"Error setting key; rc = [%d]\n",
@@ -383,9 +376,9 @@ static int crypt_scatterlist(struct ecryptfs_crypt_stat *crypt_stat,
crypt_stat->flags |= ECRYPTFS_KEY_SET;
}
mutex_unlock(&crypt_stat->cs_tfm_mutex);
- ablkcipher_request_set_crypt(req, src_sg, dst_sg, size, iv);
- rc = op == ENCRYPT ? crypto_ablkcipher_encrypt(req) :
- crypto_ablkcipher_decrypt(req);
+ skcipher_request_set_crypt(req, src_sg, dst_sg, size, iv);
+ rc = op == ENCRYPT ? crypto_skcipher_encrypt(req) :
+ crypto_skcipher_decrypt(req);
if (rc == -EINPROGRESS || rc == -EBUSY) {
struct extent_crypt_result *ecr = req->base.data;
@@ -394,7 +387,7 @@ static int crypt_scatterlist(struct ecryptfs_crypt_stat *crypt_stat,
reinit_completion(&ecr->completion);
}
out:
- ablkcipher_request_free(req);
+ skcipher_request_free(req);
return rc;
}
@@ -622,7 +615,7 @@ int ecryptfs_init_crypt_ctx(struct ecryptfs_crypt_stat *crypt_stat)
crypt_stat->cipher, "cbc");
if (rc)
goto out_unlock;
- crypt_stat->tfm = crypto_alloc_ablkcipher(full_alg_name, 0, 0);
+ crypt_stat->tfm = crypto_alloc_skcipher(full_alg_name, 0, 0);
if (IS_ERR(crypt_stat->tfm)) {
rc = PTR_ERR(crypt_stat->tfm);
crypt_stat->tfm = NULL;
@@ -631,7 +624,7 @@ int ecryptfs_init_crypt_ctx(struct ecryptfs_crypt_stat *crypt_stat)
full_alg_name);
goto out_free;
}
- crypto_ablkcipher_set_flags(crypt_stat->tfm, CRYPTO_TFM_REQ_WEAK_KEY);
+ crypto_skcipher_set_flags(crypt_stat->tfm, CRYPTO_TFM_REQ_WEAK_KEY);
rc = 0;
out_free:
kfree(full_alg_name);
@@ -1589,7 +1582,7 @@ out:
* event, regardless of whether this function succeeds for fails.
*/
static int
-ecryptfs_process_key_cipher(struct crypto_blkcipher **key_tfm,
+ecryptfs_process_key_cipher(struct crypto_skcipher **key_tfm,
char *cipher_name, size_t *key_size)
{
char dummy_key[ECRYPTFS_MAX_KEY_BYTES];
@@ -1607,21 +1600,18 @@ ecryptfs_process_key_cipher(struct crypto_blkcipher **key_tfm,
"ecb");
if (rc)
goto out;
- *key_tfm = crypto_alloc_blkcipher(full_alg_name, 0, CRYPTO_ALG_ASYNC);
+ *key_tfm = crypto_alloc_skcipher(full_alg_name, 0, CRYPTO_ALG_ASYNC);
if (IS_ERR(*key_tfm)) {
rc = PTR_ERR(*key_tfm);
printk(KERN_ERR "Unable to allocate crypto cipher with name "
"[%s]; rc = [%d]\n", full_alg_name, rc);
goto out;
}
- crypto_blkcipher_set_flags(*key_tfm, CRYPTO_TFM_REQ_WEAK_KEY);
- if (*key_size == 0) {
- struct blkcipher_alg *alg = crypto_blkcipher_alg(*key_tfm);
-
- *key_size = alg->max_keysize;
- }
+ crypto_skcipher_set_flags(*key_tfm, CRYPTO_TFM_REQ_WEAK_KEY);
+ if (*key_size == 0)
+ *key_size = crypto_skcipher_default_keysize(*key_tfm);
get_random_bytes(dummy_key, *key_size);
- rc = crypto_blkcipher_setkey(*key_tfm, dummy_key, *key_size);
+ rc = crypto_skcipher_setkey(*key_tfm, dummy_key, *key_size);
if (rc) {
printk(KERN_ERR "Error attempting to set key of size [%zd] for "
"cipher [%s]; rc = [%d]\n", *key_size, full_alg_name,
@@ -1658,8 +1648,7 @@ int ecryptfs_destroy_crypto(void)
list_for_each_entry_safe(key_tfm, key_tfm_tmp, &key_tfm_list,
key_tfm_list) {
list_del(&key_tfm->key_tfm_list);
- if (key_tfm->key_tfm)
- crypto_free_blkcipher(key_tfm->key_tfm);
+ crypto_free_skcipher(key_tfm->key_tfm);
kmem_cache_free(ecryptfs_key_tfm_cache, key_tfm);
}
mutex_unlock(&key_tfm_list_mutex);
@@ -1745,7 +1734,7 @@ int ecryptfs_tfm_exists(char *cipher_name, struct ecryptfs_key_tfm **key_tfm)
* Searches for cached item first, and creates new if not found.
* Returns 0 on success, non-zero if adding new cipher failed
*/
-int ecryptfs_get_tfm_and_mutex_for_cipher_name(struct crypto_blkcipher **tfm,
+int ecryptfs_get_tfm_and_mutex_for_cipher_name(struct crypto_skcipher **tfm,
struct mutex **tfm_mutex,
char *cipher_name)
{
@@ -2111,7 +2100,7 @@ out:
int ecryptfs_set_f_namelen(long *namelen, long lower_namelen,
struct ecryptfs_mount_crypt_stat *mount_crypt_stat)
{
- struct blkcipher_desc desc;
+ struct crypto_skcipher *tfm;
struct mutex *tfm_mutex;
size_t cipher_blocksize;
int rc;
@@ -2121,7 +2110,7 @@ int ecryptfs_set_f_namelen(long *namelen, long lower_namelen,
return 0;
}
- rc = ecryptfs_get_tfm_and_mutex_for_cipher_name(&desc.tfm, &tfm_mutex,
+ rc = ecryptfs_get_tfm_and_mutex_for_cipher_name(&tfm, &tfm_mutex,
mount_crypt_stat->global_default_fn_cipher_name);
if (unlikely(rc)) {
(*namelen) = 0;
@@ -2129,7 +2118,7 @@ int ecryptfs_set_f_namelen(long *namelen, long lower_namelen,
}
mutex_lock(tfm_mutex);
- cipher_blocksize = crypto_blkcipher_blocksize(desc.tfm);
+ cipher_blocksize = crypto_skcipher_blocksize(tfm);
mutex_unlock(tfm_mutex);
/* Return an exact amount for the common cases */
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.