Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net

[cascardo/linux.git] / net / mac80211 / aes_gmac.c

diff --git a/net/mac80211/aes_gmac.c b/net/mac80211/aes_gmac.c
index 3ddd927..bd72a86 100644 (file)
--- a/net/mac80211/aes_gmac.c
+++ b/net/mac80211/aes_gmac.c
@@ -17,28 +17,27 @@
 #include "key.h"
 #include "aes_gmac.h"
 
-#define GMAC_MIC_LEN 16
-#define GMAC_NONCE_LEN 12
-#define AAD_LEN 20
-
 int ieee80211_aes_gmac(struct crypto_aead *tfm, const u8 *aad, u8 *nonce,
                       const u8 *data, size_t data_len, u8 *mic)
 {
        struct scatterlist sg[4];
-       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;
-       u8 zero[GMAC_MIC_LEN], iv[AES_BLOCK_SIZE];
+       u8 *zero, *__aad, iv[AES_BLOCK_SIZE];
+       struct aead_request *aead_req;
+       int reqsize = sizeof(*aead_req) + crypto_aead_reqsize(tfm);
 
        if (data_len < GMAC_MIC_LEN)
                return -EINVAL;
 
-       memset(aead_req, 0, sizeof(aead_req_data));
+       aead_req = kzalloc(reqsize + GMAC_MIC_LEN + GMAC_AAD_LEN, GFP_ATOMIC);
+       if (!aead_req)
+               return -ENOMEM;
+
+       zero = (u8 *)aead_req + reqsize;
+       __aad = zero + GMAC_MIC_LEN;
+       memcpy(__aad, aad, GMAC_AAD_LEN);
 
-       memset(zero, 0, GMAC_MIC_LEN);
        sg_init_table(sg, 4);
-       sg_set_buf(&sg[0], aad, AAD_LEN);
+       sg_set_buf(&sg[0], __aad, GMAC_AAD_LEN);
        sg_set_buf(&sg[1], data, data_len - GMAC_MIC_LEN);
        sg_set_buf(&sg[2], zero, GMAC_MIC_LEN);
        sg_set_buf(&sg[3], mic, GMAC_MIC_LEN);
@@ -49,9 +48,10 @@ int ieee80211_aes_gmac(struct crypto_aead *tfm, const u8 *aad, u8 *nonce,
 
        aead_request_set_tfm(aead_req, tfm);
        aead_request_set_crypt(aead_req, sg, sg, 0, iv);
-       aead_request_set_ad(aead_req, AAD_LEN + data_len);
+       aead_request_set_ad(aead_req, GMAC_AAD_LEN + data_len);
 
        crypto_aead_encrypt(aead_req);
+       kzfree(aead_req);
 
        return 0;
 }