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Diffstat (limited to 'net/mac80211/aes_ccm.c')
-rw-r--r--net/mac80211/aes_ccm.c51
1 files changed, 25 insertions, 26 deletions
diff --git a/net/mac80211/aes_ccm.c b/net/mac80211/aes_ccm.c
index 4d4c2dfcf9a..a87cb3ba2df 100644
--- a/net/mac80211/aes_ccm.c
+++ b/net/mac80211/aes_ccm.c
@@ -16,31 +16,28 @@
#include "key.h"
#include "aes_ccm.h"
-
-static void ieee80211_aes_encrypt(struct crypto_cipher *tfm,
- const u8 pt[16], u8 ct[16])
-{
- crypto_cipher_encrypt_one(tfm, ct, pt);
-}
-
-
-static inline void aes_ccm_prepare(struct crypto_cipher *tfm, u8 *b_0, u8 *aad,
- u8 *b, u8 *s_0, u8 *a)
+static void aes_ccm_prepare(struct crypto_cipher *tfm, u8 *scratch, u8 *a)
{
int i;
+ u8 *b_0, *aad, *b, *s_0;
- ieee80211_aes_encrypt(tfm, b_0, b);
+ b_0 = scratch + 3 * AES_BLOCK_LEN;
+ aad = scratch + 4 * AES_BLOCK_LEN;
+ b = scratch;
+ s_0 = scratch + AES_BLOCK_LEN;
+
+ crypto_cipher_encrypt_one(tfm, b, b_0);
/* Extra Authenticate-only data (always two AES blocks) */
for (i = 0; i < AES_BLOCK_LEN; i++)
aad[i] ^= b[i];
- ieee80211_aes_encrypt(tfm, aad, b);
+ crypto_cipher_encrypt_one(tfm, b, aad);
aad += AES_BLOCK_LEN;
for (i = 0; i < AES_BLOCK_LEN; i++)
aad[i] ^= b[i];
- ieee80211_aes_encrypt(tfm, aad, a);
+ crypto_cipher_encrypt_one(tfm, a, aad);
/* Mask out bits from auth-only-b_0 */
b_0[0] &= 0x07;
@@ -48,24 +45,26 @@ static inline void aes_ccm_prepare(struct crypto_cipher *tfm, u8 *b_0, u8 *aad,
/* S_0 is used to encrypt T (= MIC) */
b_0[14] = 0;
b_0[15] = 0;
- ieee80211_aes_encrypt(tfm, b_0, s_0);
+ crypto_cipher_encrypt_one(tfm, s_0, b_0);
}
void ieee80211_aes_ccm_encrypt(struct crypto_cipher *tfm, u8 *scratch,
- u8 *b_0, u8 *aad, u8 *data, size_t data_len,
+ u8 *data, size_t data_len,
u8 *cdata, u8 *mic)
{
int i, j, last_len, num_blocks;
- u8 *pos, *cpos, *b, *s_0, *e;
+ u8 *pos, *cpos, *b, *s_0, *e, *b_0, *aad;
b = scratch;
s_0 = scratch + AES_BLOCK_LEN;
e = scratch + 2 * AES_BLOCK_LEN;
+ b_0 = scratch + 3 * AES_BLOCK_LEN;
+ aad = scratch + 4 * AES_BLOCK_LEN;
num_blocks = DIV_ROUND_UP(data_len, AES_BLOCK_LEN);
last_len = data_len % AES_BLOCK_LEN;
- aes_ccm_prepare(tfm, b_0, aad, b, s_0, b);
+ aes_ccm_prepare(tfm, scratch, b);
/* Process payload blocks */
pos = data;
@@ -77,11 +76,11 @@ void ieee80211_aes_ccm_encrypt(struct crypto_cipher *tfm, u8 *scratch,
/* Authentication followed by encryption */
for (i = 0; i < blen; i++)
b[i] ^= pos[i];
- ieee80211_aes_encrypt(tfm, b, b);
+ crypto_cipher_encrypt_one(tfm, b, b);
b_0[14] = (j >> 8) & 0xff;
b_0[15] = j & 0xff;
- ieee80211_aes_encrypt(tfm, b_0, e);
+ crypto_cipher_encrypt_one(tfm, e, b_0);
for (i = 0; i < blen; i++)
*cpos++ = *pos++ ^ e[i];
}
@@ -92,19 +91,20 @@ void ieee80211_aes_ccm_encrypt(struct crypto_cipher *tfm, u8 *scratch,
int ieee80211_aes_ccm_decrypt(struct crypto_cipher *tfm, u8 *scratch,
- u8 *b_0, u8 *aad, u8 *cdata, size_t data_len,
- u8 *mic, u8 *data)
+ u8 *cdata, size_t data_len, u8 *mic, u8 *data)
{
int i, j, last_len, num_blocks;
- u8 *pos, *cpos, *b, *s_0, *a;
+ u8 *pos, *cpos, *b, *s_0, *a, *b_0, *aad;
b = scratch;
s_0 = scratch + AES_BLOCK_LEN;
a = scratch + 2 * AES_BLOCK_LEN;
+ b_0 = scratch + 3 * AES_BLOCK_LEN;
+ aad = scratch + 4 * AES_BLOCK_LEN;
num_blocks = DIV_ROUND_UP(data_len, AES_BLOCK_LEN);
last_len = data_len % AES_BLOCK_LEN;
- aes_ccm_prepare(tfm, b_0, aad, b, s_0, a);
+ aes_ccm_prepare(tfm, scratch, a);
/* Process payload blocks */
cpos = cdata;
@@ -116,13 +116,12 @@ int ieee80211_aes_ccm_decrypt(struct crypto_cipher *tfm, u8 *scratch,
/* Decryption followed by authentication */
b_0[14] = (j >> 8) & 0xff;
b_0[15] = j & 0xff;
- ieee80211_aes_encrypt(tfm, b_0, b);
+ crypto_cipher_encrypt_one(tfm, b, b_0);
for (i = 0; i < blen; i++) {
*pos = *cpos++ ^ b[i];
a[i] ^= *pos++;
}
-
- ieee80211_aes_encrypt(tfm, a, a);
+ crypto_cipher_encrypt_one(tfm, a, a);
}
for (i = 0; i < CCMP_MIC_LEN; i++) {