diff options
Diffstat (limited to 'package/kernel/mac80211/patches/100-remove-cryptoapi-dependencies.patch')
| -rw-r--r-- | package/kernel/mac80211/patches/100-remove-cryptoapi-dependencies.patch | 90 |
1 files changed, 48 insertions, 42 deletions
diff --git a/package/kernel/mac80211/patches/100-remove-cryptoapi-dependencies.patch b/package/kernel/mac80211/patches/100-remove-cryptoapi-dependencies.patch index b65b0bd00e..fbe22e51b7 100644 --- a/package/kernel/mac80211/patches/100-remove-cryptoapi-dependencies.patch +++ b/package/kernel/mac80211/patches/100-remove-cryptoapi-dependencies.patch @@ -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); -+ + +- 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) - { -- struct scatterlist sg[3]; ++ 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; - -- 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); @@ -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; |