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mac80211: refresh patches

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Signed-off-by: Mathias Kresin <dev@kresin.me>
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
This commit is contained in:
Mathias Kresin
2016-07-01 15:41:16 +02:00
committed by Felix Fietkau
parent 76d09dcb01
commit cbfeb7796e
3 changed files with 65 additions and 59 deletions
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106
package/kernel/mac80211/patches/100-remove-cryptoapi-dependencies.patch
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@@ -34,9 +34,12 @@
#include "aes_ccm.h"
-void ieee80211_aes_ccm_encrypt(struct crypto_aead *tfm, u8 *b_0, u8 *aad,
- u8 *data, size_t data_len, u8 *mic,
- size_t mic_len)
+static void aes_ccm_prepare(struct crypto_cipher *tfm, u8 *b_0, u8 *aad, u8 *s_0,
+ u8 *a, u8 *b)
+{
{
- struct scatterlist sg[3];
+ int i;
+
+ crypto_cipher_encrypt_one(tfm, b, b_0);
@@ -51,56 +54,55 @@
+ for (i = 0; i < AES_BLOCK_SIZE; i++)
+ aad[i] ^= b[i];
+ crypto_cipher_encrypt_one(tfm, a, aad);
+
+ /* Mask out bits from auth-only-b_0 */
+ b_0[0] &= 0x07;
+
+ /* S_0 is used to encrypt T (= MIC) */
+ b_0[14] = 0;
+ b_0[15] = 0;
+ crypto_cipher_encrypt_one(tfm, s_0, b_0);
+}
+
+
+void ieee80211_aes_ccm_encrypt(struct crypto_cipher *tfm, u8 *b_0, u8 *aad,
u8 *data, size_t data_len, u8 *mic,
size_t mic_len)
{
- struct scatterlist sg[3];
+ int i, j, last_len, num_blocks;
+ u8 b[AES_BLOCK_SIZE];
+ u8 s_0[AES_BLOCK_SIZE];
+ u8 e[AES_BLOCK_SIZE];
+ u8 *pos, *cpos;
- char aead_req_data[sizeof(struct aead_request) +
- crypto_aead_reqsize(tfm)]
- __aligned(__alignof__(struct aead_request));
- struct aead_request *aead_req = (void *) aead_req_data;
+ /* Mask out bits from auth-only-b_0 */
+ b_0[0] &= 0x07;
- memset(aead_req, 0, sizeof(aead_req_data));
+ /* S_0 is used to encrypt T (= MIC) */
+ b_0[14] = 0;
+ b_0[15] = 0;
+ crypto_cipher_encrypt_one(tfm, s_0, b_0);
+}
- sg_init_table(sg, 3);
- sg_set_buf(&sg[0], &aad[2], be16_to_cpup((__be16 *)aad));
- sg_set_buf(&sg[1], data, data_len);
- sg_set_buf(&sg[2], mic, mic_len);
- aead_request_set_tfm(aead_req, tfm);
- aead_request_set_crypt(aead_req, sg, sg, data_len, b_0);
- aead_request_set_ad(aead_req, sg[0].length);
+void ieee80211_aes_ccm_encrypt(struct crypto_cipher *tfm, u8 *b_0, u8 *aad,
+ u8 *data, size_t data_len, u8 *mic,
+ size_t mic_len)
+{
+ int i, j, last_len, num_blocks;
+ u8 b[AES_BLOCK_SIZE];
+ u8 s_0[AES_BLOCK_SIZE];
+ u8 e[AES_BLOCK_SIZE];
+ u8 *pos, *cpos;
+
+ num_blocks = DIV_ROUND_UP(data_len, AES_BLOCK_SIZE);
+ last_len = data_len % AES_BLOCK_SIZE;
+ aes_ccm_prepare(tfm, b_0, aad, s_0, b, b);
- memset(aead_req, 0, sizeof(aead_req_data));
+
+ /* Process payload blocks */
+ pos = data;
+ cpos = data;
+ for (j = 1; j <= num_blocks; j++) {
+ int blen = (j == num_blocks && last_len) ?
+ last_len : AES_BLOCK_SIZE;
- sg_init_table(sg, 3);
- sg_set_buf(&sg[0], &aad[2], be16_to_cpup((__be16 *)aad));
- sg_set_buf(&sg[1], data, data_len);
- sg_set_buf(&sg[2], mic, mic_len);
+
+ /* Authentication followed by encryption */
+ for (i = 0; i < blen; i++)
+ b[i] ^= pos[i];
+ crypto_cipher_encrypt_one(tfm, b, b);
- aead_request_set_tfm(aead_req, tfm);
- aead_request_set_crypt(aead_req, sg, sg, data_len, b_0);
- aead_request_set_ad(aead_req, sg[0].length);
+
+ b_0[14] = (j >> 8) & 0xff;
+ b_0[15] = j & 0xff;
+ crypto_cipher_encrypt_one(tfm, e, b_0);
@@ -123,30 +125,37 @@
- crypto_aead_reqsize(tfm)]
- __aligned(__alignof__(struct aead_request));
- struct aead_request *aead_req = (void *) aead_req_data;
-
- if (data_len == 0)
- return -EINVAL;
-
- memset(aead_req, 0, sizeof(aead_req_data));
-
- sg_init_table(sg, 3);
- sg_set_buf(&sg[0], &aad[2], be16_to_cpup((__be16 *)aad));
- sg_set_buf(&sg[1], data, data_len);
- sg_set_buf(&sg[2], mic, mic_len);
-
- aead_request_set_tfm(aead_req, tfm);
- aead_request_set_crypt(aead_req, sg, sg, data_len + mic_len, b_0);
- aead_request_set_ad(aead_req, sg[0].length);
+ int i, j, last_len, num_blocks;
+ u8 *pos, *cpos;
+ u8 a[AES_BLOCK_SIZE];
+ u8 b[AES_BLOCK_SIZE];
+ u8 s_0[AES_BLOCK_SIZE];
- if (data_len == 0)
- return -EINVAL;
+
+ num_blocks = DIV_ROUND_UP(data_len, AES_BLOCK_SIZE);
+ last_len = data_len % AES_BLOCK_SIZE;
+ aes_ccm_prepare(tfm, b_0, aad, s_0, a, b);
- memset(aead_req, 0, sizeof(aead_req_data));
+
+ /* Process payload blocks */
+ cpos = data;
+ pos = data;
+ for (j = 1; j <= num_blocks; j++) {
+ int blen = (j == num_blocks && last_len) ?
+ last_len : AES_BLOCK_SIZE;
- sg_init_table(sg, 3);
- sg_set_buf(&sg[0], &aad[2], be16_to_cpup((__be16 *)aad));
- sg_set_buf(&sg[1], data, data_len);
- sg_set_buf(&sg[2], mic, mic_len);
+
+ /* Decryption followed by authentication */
+ b_0[14] = (j >> 8) & 0xff;
+ b_0[15] = j & 0xff;
@@ -157,10 +166,7 @@
+ }
+ crypto_cipher_encrypt_one(tfm, a, a);
+ }
- aead_request_set_tfm(aead_req, tfm);
- aead_request_set_crypt(aead_req, sg, sg, data_len + mic_len, b_0);
- aead_request_set_ad(aead_req, sg[0].length);
+
+ for (i = 0; i < mic_len; i++) {
+ if ((mic[i] ^ s_0[i]) != a[i])
+ return -1;
@@ -179,12 +185,12 @@
{
- struct crypto_aead *tfm;
- int err;
-
+ struct crypto_cipher *tfm;
- tfm = crypto_alloc_aead("ccm(aes)", 0, CRYPTO_ALG_ASYNC);
- if (IS_ERR(tfm))
- return tfm;
+ struct crypto_cipher *tfm;
-
- err = crypto_aead_setkey(tfm, key, key_len);
- if (err)
- goto free_aead;