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

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

diff --git a/net/mac80211/aes_gcm.c b/net/mac80211/aes_gcm.c
index 3afe361..8a4397c 100644 (file)
--- a/net/mac80211/aes_gcm.c
+++ b/net/mac80211/aes_gcm.c
@@ -15,20 +15,23 @@
 #include "key.h"
 #include "aes_gcm.h"
 
-void ieee80211_aes_gcm_encrypt(struct crypto_aead *tfm, u8 *j_0, u8 *aad,
-                              u8 *data, size_t data_len, u8 *mic)
+int ieee80211_aes_gcm_encrypt(struct crypto_aead *tfm, u8 *j_0, u8 *aad,
+                             u8 *data, size_t data_len, u8 *mic)
 {
        struct scatterlist sg[3];
+       struct aead_request *aead_req;
+       int reqsize = sizeof(*aead_req) + crypto_aead_reqsize(tfm);
+       u8 *__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;
+       aead_req = kzalloc(reqsize + GCM_AAD_LEN, GFP_ATOMIC);
+       if (!aead_req)
+               return -ENOMEM;
 
-       memset(aead_req, 0, sizeof(aead_req_data));
+       __aad = (u8 *)aead_req + reqsize;
+       memcpy(__aad, aad, GCM_AAD_LEN);
 
        sg_init_table(sg, 3);
-       sg_set_buf(&sg[0], &aad[2], be16_to_cpup((__be16 *)aad));
+       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, IEEE80211_GCMP_MIC_LEN);
 
@@ -37,24 +40,31 @@ void ieee80211_aes_gcm_encrypt(struct crypto_aead *tfm, u8 *j_0, u8 *aad,
        aead_request_set_ad(aead_req, sg[0].length);
 
        crypto_aead_encrypt(aead_req);
+       kzfree(aead_req);
+       return 0;
 }
 
 int ieee80211_aes_gcm_decrypt(struct crypto_aead *tfm, u8 *j_0, u8 *aad,
                              u8 *data, size_t data_len, u8 *mic)
 {
        struct scatterlist sg[3];
-       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;
+       struct aead_request *aead_req;
+       int reqsize = sizeof(*aead_req) + crypto_aead_reqsize(tfm);
+       u8 *__aad;
+       int err;
 
        if (data_len == 0)
                return -EINVAL;
 
-       memset(aead_req, 0, sizeof(aead_req_data));
+       aead_req = kzalloc(reqsize + GCM_AAD_LEN, GFP_ATOMIC);
+       if (!aead_req)
+               return -ENOMEM;
+
+       __aad = (u8 *)aead_req + reqsize;
+       memcpy(__aad, aad, GCM_AAD_LEN);
 
        sg_init_table(sg, 3);
-       sg_set_buf(&sg[0], &aad[2], be16_to_cpup((__be16 *)aad));
+       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, IEEE80211_GCMP_MIC_LEN);
 
@@ -63,7 +73,10 @@ int ieee80211_aes_gcm_decrypt(struct crypto_aead *tfm, u8 *j_0, u8 *aad,
                               data_len + IEEE80211_GCMP_MIC_LEN, j_0);
        aead_request_set_ad(aead_req, sg[0].length);
 
-       return crypto_aead_decrypt(aead_req);
+       err = crypto_aead_decrypt(aead_req);
+       kzfree(aead_req);
+
+       return err;
 }
 
 struct crypto_aead *ieee80211_aes_gcm_key_setup_encrypt(const u8 key[],