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mac80211: aes_ccm.c remove crypto wrapper and extra args

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Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Harvey Harrison 2008-07-02 16:30:53 -07:00 committed by John W. Linville
parent feccb46694
commit 5fdae6b37e
1 changed files with 17 additions and 21 deletions
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38
net/mac80211/aes_ccm.c
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@ -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;
@ -48,7 +45,7 @@ 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);
}
@ -67,7 +64,7 @@ void ieee80211_aes_ccm_encrypt(struct crypto_cipher *tfm, u8 *scratch,
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;
@ -79,11 +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];
}
@ -107,7 +104,7 @@ int ieee80211_aes_ccm_decrypt(struct crypto_cipher *tfm, u8 *scratch,
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;
@ -119,13 +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++) {