#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);
+ for (i = 0; i < AES_BLOCK_SIZE; i++)
+ aad[i] ^= b[i];
+ crypto_cipher_encrypt_one(tfm, a, aad);
-
-- 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)
-+{
+ 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;
+ 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);
- 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;
+ }
+ 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;
{
- 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;
#endif /* AES_GMAC_H */
--- a/net/mac80211/key.h
+++ b/net/mac80211/key.h
-@@ -84,7 +84,7 @@ struct ieee80211_key {
+@@ -88,7 +88,7 @@ struct ieee80211_key {
* Management frames.
*/
u8 rx_pn[IEEE80211_NUM_TIDS + 1][IEEE80211_CCMP_PN_LEN];
struct {
--- a/net/mac80211/wpa.c
+++ b/net/mac80211/wpa.c
-@@ -307,7 +307,8 @@ ieee80211_crypto_tkip_decrypt(struct iee
+@@ -304,7 +304,8 @@ ieee80211_crypto_tkip_decrypt(struct iee
}
{
__le16 mask_fc;
int a4_included, mgmt;
-@@ -337,14 +338,8 @@ static void ccmp_special_blocks(struct s
+@@ -334,14 +335,8 @@ static void ccmp_special_blocks(struct s
else
qos_tid = 0;
/* Nonce: Nonce Flags | A2 | PN
* Nonce Flags: Priority (b0..b3) | Management (b4) | Reserved (b5..b7)
-@@ -352,6 +347,8 @@ static void ccmp_special_blocks(struct s
+@@ -349,6 +344,8 @@ static void ccmp_special_blocks(struct s
b_0[1] = qos_tid | (mgmt << 4);
memcpy(&b_0[2], hdr->addr2, ETH_ALEN);
memcpy(&b_0[8], pn, IEEE80211_CCMP_PN_LEN);
/* AAD (extra authenticate-only data) / masked 802.11 header
* FC | A1 | A2 | A3 | SC | [A4] | [QC] */
-@@ -463,7 +460,7 @@ static int ccmp_encrypt_skb(struct ieee8
+@@ -460,7 +457,7 @@ static int ccmp_encrypt_skb(struct ieee8
return 0;
pos += IEEE80211_CCMP_HDR_LEN;
ieee80211_aes_ccm_encrypt(key->u.ccmp.tfm, b_0, aad, pos, len,
skb_put(skb, mic_len), mic_len);
-@@ -534,7 +531,7 @@ ieee80211_crypto_ccmp_decrypt(struct iee
+@@ -537,7 +534,7 @@ ieee80211_crypto_ccmp_decrypt(struct iee
u8 aad[2 * AES_BLOCK_SIZE];
u8 b_0[AES_BLOCK_SIZE];
/* hardware didn't decrypt/verify MIC */
projects / openwrt / staging / chunkeey.git / blobdiff