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Date: Sun, 24 Jan 2016 21:18:19 +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 14/26] KEYS: Use skcipher
This patch replaces uses of blkcipher with skcipher.
Signed-off-by: Herbert Xu <herbert@...dor.apana.org.au>
---
security/keys/encrypted-keys/encrypted.c | 82 ++++++++++++++++++-------------
1 file changed, 50 insertions(+), 32 deletions(-)
diff --git a/security/keys/encrypted-keys/encrypted.c b/security/keys/encrypted-keys/encrypted.c
index 696ccfa..5adbfc3 100644
--- a/security/keys/encrypted-keys/encrypted.c
+++ b/security/keys/encrypted-keys/encrypted.c
@@ -28,11 +28,10 @@
#include <linux/random.h>
#include <linux/rcupdate.h>
#include <linux/scatterlist.h>
-#include <linux/crypto.h>
#include <linux/ctype.h>
#include <crypto/hash.h>
#include <crypto/sha.h>
-#include <crypto/aes.h>
+#include <crypto/skcipher.h>
#include "encrypted.h"
#include "ecryptfs_format.h"
@@ -85,17 +84,17 @@ static const match_table_t key_tokens = {
static int aes_get_sizes(void)
{
- struct crypto_blkcipher *tfm;
+ struct crypto_skcipher *tfm;
- tfm = crypto_alloc_blkcipher(blkcipher_alg, 0, CRYPTO_ALG_ASYNC);
+ tfm = crypto_alloc_skcipher(blkcipher_alg, 0, CRYPTO_ALG_ASYNC);
if (IS_ERR(tfm)) {
pr_err("encrypted_key: failed to alloc_cipher (%ld)\n",
PTR_ERR(tfm));
return PTR_ERR(tfm);
}
- ivsize = crypto_blkcipher_ivsize(tfm);
- blksize = crypto_blkcipher_blocksize(tfm);
- crypto_free_blkcipher(tfm);
+ ivsize = crypto_skcipher_ivsize(tfm);
+ blksize = crypto_skcipher_blocksize(tfm);
+ crypto_free_skcipher(tfm);
return 0;
}
@@ -401,28 +400,37 @@ static int get_derived_key(u8 *derived_key, enum derived_key_type key_type,
return ret;
}
-static int init_blkcipher_desc(struct blkcipher_desc *desc, const u8 *key,
- unsigned int key_len, const u8 *iv,
- unsigned int ivsize)
+static struct skcipher_request *init_skcipher_req(const u8 *key,
+ unsigned int key_len)
{
+ struct skcipher_request *req;
+ struct crypto_skcipher *tfm;
int ret;
- desc->tfm = crypto_alloc_blkcipher(blkcipher_alg, 0, CRYPTO_ALG_ASYNC);
- if (IS_ERR(desc->tfm)) {
+ tfm = crypto_alloc_skcipher(blkcipher_alg, 0, CRYPTO_ALG_ASYNC);
+ if (IS_ERR(tfm)) {
pr_err("encrypted_key: failed to load %s transform (%ld)\n",
- blkcipher_alg, PTR_ERR(desc->tfm));
- return PTR_ERR(desc->tfm);
+ blkcipher_alg, PTR_ERR(tfm));
+ return ERR_CAST(tfm);
}
- desc->flags = 0;
- ret = crypto_blkcipher_setkey(desc->tfm, key, key_len);
+ ret = crypto_skcipher_setkey(tfm, key, key_len);
if (ret < 0) {
pr_err("encrypted_key: failed to setkey (%d)\n", ret);
- crypto_free_blkcipher(desc->tfm);
- return ret;
+ crypto_free_skcipher(tfm);
+ return ERR_PTR(ret);
}
- crypto_blkcipher_set_iv(desc->tfm, iv, ivsize);
- return 0;
+
+ req = skcipher_request_alloc(tfm, GFP_KERNEL);
+ if (!req) {
+ pr_err("encrypted_key: failed to allocate request for %s\n",
+ blkcipher_alg);
+ crypto_free_skcipher(tfm);
+ return ERR_PTR(-ENOMEM);
+ }
+
+ skcipher_request_set_callback(req, 0, NULL, NULL);
+ return req;
}
static struct key *request_master_key(struct encrypted_key_payload *epayload,
@@ -467,7 +475,8 @@ static int derived_key_encrypt(struct encrypted_key_payload *epayload,
{
struct scatterlist sg_in[2];
struct scatterlist sg_out[1];
- struct blkcipher_desc desc;
+ struct crypto_skcipher *tfm;
+ struct skcipher_request *req;
unsigned int encrypted_datalen;
unsigned int padlen;
char pad[16];
@@ -476,9 +485,9 @@ static int derived_key_encrypt(struct encrypted_key_payload *epayload,
encrypted_datalen = roundup(epayload->decrypted_datalen, blksize);
padlen = encrypted_datalen - epayload->decrypted_datalen;
- ret = init_blkcipher_desc(&desc, derived_key, derived_keylen,
- epayload->iv, ivsize);
- if (ret < 0)
+ req = init_skcipher_req(derived_key, derived_keylen);
+ ret = PTR_ERR(req);
+ if (IS_ERR(req))
goto out;
dump_decrypted_data(epayload);
@@ -491,8 +500,12 @@ static int derived_key_encrypt(struct encrypted_key_payload *epayload,
sg_init_table(sg_out, 1);
sg_set_buf(sg_out, epayload->encrypted_data, encrypted_datalen);
- ret = crypto_blkcipher_encrypt(&desc, sg_out, sg_in, encrypted_datalen);
- crypto_free_blkcipher(desc.tfm);
+ skcipher_request_set_crypt(req, sg_in, sg_out, encrypted_datalen,
+ epayload->iv);
+ ret = crypto_skcipher_encrypt(req);
+ tfm = crypto_skcipher_reqtfm(req);
+ skcipher_request_free(req);
+ crypto_free_skcipher(tfm);
if (ret < 0)
pr_err("encrypted_key: failed to encrypt (%d)\n", ret);
else
@@ -565,15 +578,16 @@ static int derived_key_decrypt(struct encrypted_key_payload *epayload,
{
struct scatterlist sg_in[1];
struct scatterlist sg_out[2];
- struct blkcipher_desc desc;
+ struct crypto_skcipher *tfm;
+ struct skcipher_request *req;
unsigned int encrypted_datalen;
char pad[16];
int ret;
encrypted_datalen = roundup(epayload->decrypted_datalen, blksize);
- ret = init_blkcipher_desc(&desc, derived_key, derived_keylen,
- epayload->iv, ivsize);
- if (ret < 0)
+ req = init_skcipher_req(derived_key, derived_keylen);
+ ret = PTR_ERR(req);
+ if (IS_ERR(req))
goto out;
dump_encrypted_data(epayload, encrypted_datalen);
@@ -585,8 +599,12 @@ static int derived_key_decrypt(struct encrypted_key_payload *epayload,
epayload->decrypted_datalen);
sg_set_buf(&sg_out[1], pad, sizeof pad);
- ret = crypto_blkcipher_decrypt(&desc, sg_out, sg_in, encrypted_datalen);
- crypto_free_blkcipher(desc.tfm);
+ skcipher_request_set_crypt(req, sg_in, sg_out, encrypted_datalen,
+ epayload->iv);
+ ret = crypto_skcipher_decrypt(req);
+ tfm = crypto_skcipher_reqtfm(req);
+ skcipher_request_free(req);
+ crypto_free_skcipher(tfm);
if (ret < 0)
goto out;
dump_decrypted_data(epayload);
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