Commit ab1e6fa4 authored by Herbert Xu's avatar Herbert Xu

wusb: Use skcipher

This patch replaces uses of blkcipher with skcipher.
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent c3a79227
...@@ -45,6 +45,7 @@ ...@@ -45,6 +45,7 @@
* funneled through AES are...16 bytes in size! * funneled through AES are...16 bytes in size!
*/ */
#include <crypto/skcipher.h>
#include <linux/crypto.h> #include <linux/crypto.h>
#include <linux/module.h> #include <linux/module.h>
#include <linux/err.h> #include <linux/err.h>
...@@ -195,21 +196,22 @@ static void bytewise_xor(void *_bo, const void *_bi1, const void *_bi2, ...@@ -195,21 +196,22 @@ static void bytewise_xor(void *_bo, const void *_bi1, const void *_bi2,
* NOTE: blen is not aligned to a block size, we'll pad zeros, that's * NOTE: blen is not aligned to a block size, we'll pad zeros, that's
* what sg[4] is for. Maybe there is a smarter way to do this. * what sg[4] is for. Maybe there is a smarter way to do this.
*/ */
static int wusb_ccm_mac(struct crypto_blkcipher *tfm_cbc, static int wusb_ccm_mac(struct crypto_skcipher *tfm_cbc,
struct crypto_cipher *tfm_aes, void *mic, struct crypto_cipher *tfm_aes, void *mic,
const struct aes_ccm_nonce *n, const struct aes_ccm_nonce *n,
const struct aes_ccm_label *a, const void *b, const struct aes_ccm_label *a, const void *b,
size_t blen) size_t blen)
{ {
int result = 0; int result = 0;
struct blkcipher_desc desc; SKCIPHER_REQUEST_ON_STACK(req, tfm_cbc);
struct aes_ccm_b0 b0; struct aes_ccm_b0 b0;
struct aes_ccm_b1 b1; struct aes_ccm_b1 b1;
struct aes_ccm_a ax; struct aes_ccm_a ax;
struct scatterlist sg[4], sg_dst; struct scatterlist sg[4], sg_dst;
void *iv, *dst_buf; void *dst_buf;
size_t ivsize, dst_size; size_t dst_size;
const u8 bzero[16] = { 0 }; const u8 bzero[16] = { 0 };
u8 iv[crypto_skcipher_ivsize(tfm_cbc)];
size_t zero_padding; size_t zero_padding;
/* /*
...@@ -232,9 +234,7 @@ static int wusb_ccm_mac(struct crypto_blkcipher *tfm_cbc, ...@@ -232,9 +234,7 @@ static int wusb_ccm_mac(struct crypto_blkcipher *tfm_cbc,
goto error_dst_buf; goto error_dst_buf;
} }
iv = crypto_blkcipher_crt(tfm_cbc)->iv; memset(iv, 0, sizeof(iv));
ivsize = crypto_blkcipher_ivsize(tfm_cbc);
memset(iv, 0, ivsize);
/* Setup B0 */ /* Setup B0 */
b0.flags = 0x59; /* Format B0 */ b0.flags = 0x59; /* Format B0 */
...@@ -259,9 +259,11 @@ static int wusb_ccm_mac(struct crypto_blkcipher *tfm_cbc, ...@@ -259,9 +259,11 @@ static int wusb_ccm_mac(struct crypto_blkcipher *tfm_cbc,
sg_set_buf(&sg[3], bzero, zero_padding); sg_set_buf(&sg[3], bzero, zero_padding);
sg_init_one(&sg_dst, dst_buf, dst_size); sg_init_one(&sg_dst, dst_buf, dst_size);
desc.tfm = tfm_cbc; skcipher_request_set_tfm(req, tfm_cbc);
desc.flags = 0; skcipher_request_set_callback(req, 0, NULL, NULL);
result = crypto_blkcipher_encrypt(&desc, &sg_dst, sg, dst_size); skcipher_request_set_crypt(req, sg, &sg_dst, dst_size, iv);
result = crypto_skcipher_encrypt(req);
skcipher_request_zero(req);
if (result < 0) { if (result < 0) {
printk(KERN_ERR "E: can't compute CBC-MAC tag (MIC): %d\n", printk(KERN_ERR "E: can't compute CBC-MAC tag (MIC): %d\n",
result); result);
...@@ -301,18 +303,18 @@ ssize_t wusb_prf(void *out, size_t out_size, ...@@ -301,18 +303,18 @@ ssize_t wusb_prf(void *out, size_t out_size,
{ {
ssize_t result, bytes = 0, bitr; ssize_t result, bytes = 0, bitr;
struct aes_ccm_nonce n = *_n; struct aes_ccm_nonce n = *_n;
struct crypto_blkcipher *tfm_cbc; struct crypto_skcipher *tfm_cbc;
struct crypto_cipher *tfm_aes; struct crypto_cipher *tfm_aes;
u64 sfn = 0; u64 sfn = 0;
__le64 sfn_le; __le64 sfn_le;
tfm_cbc = crypto_alloc_blkcipher("cbc(aes)", 0, CRYPTO_ALG_ASYNC); tfm_cbc = crypto_alloc_skcipher("cbc(aes)", 0, CRYPTO_ALG_ASYNC);
if (IS_ERR(tfm_cbc)) { if (IS_ERR(tfm_cbc)) {
result = PTR_ERR(tfm_cbc); result = PTR_ERR(tfm_cbc);
printk(KERN_ERR "E: can't load CBC(AES): %d\n", (int)result); printk(KERN_ERR "E: can't load CBC(AES): %d\n", (int)result);
goto error_alloc_cbc; goto error_alloc_cbc;
} }
result = crypto_blkcipher_setkey(tfm_cbc, key, 16); result = crypto_skcipher_setkey(tfm_cbc, key, 16);
if (result < 0) { if (result < 0) {
printk(KERN_ERR "E: can't set CBC key: %d\n", (int)result); printk(KERN_ERR "E: can't set CBC key: %d\n", (int)result);
goto error_setkey_cbc; goto error_setkey_cbc;
...@@ -345,7 +347,7 @@ ssize_t wusb_prf(void *out, size_t out_size, ...@@ -345,7 +347,7 @@ ssize_t wusb_prf(void *out, size_t out_size,
crypto_free_cipher(tfm_aes); crypto_free_cipher(tfm_aes);
error_alloc_aes: error_alloc_aes:
error_setkey_cbc: error_setkey_cbc:
crypto_free_blkcipher(tfm_cbc); crypto_free_skcipher(tfm_cbc);
error_alloc_cbc: error_alloc_cbc:
return result; return result;
} }
......
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