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Diffstat (limited to 'net/mac80211/aes_gmac.c')
-rw-r--r--net/mac80211/aes_gmac.c24
1 files changed, 18 insertions, 6 deletions
diff --git a/net/mac80211/aes_gmac.c b/net/mac80211/aes_gmac.c
index 363ad1c1dc0c..16ba09cb5def 100644
--- a/net/mac80211/aes_gmac.c
+++ b/net/mac80211/aes_gmac.c
@@ -17,10 +17,11 @@
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];
+ struct scatterlist sg[5];
u8 *zero, *__aad, iv[AES_BLOCK_SIZE];
struct aead_request *aead_req;
int reqsize = sizeof(*aead_req) + crypto_aead_reqsize(tfm);
+ const __le16 *fc;
if (data_len < GMAC_MIC_LEN)
return -EINVAL;
@@ -33,11 +34,22 @@ int ieee80211_aes_gmac(struct crypto_aead *tfm, const u8 *aad, u8 *nonce,
__aad = zero + GMAC_MIC_LEN;
memcpy(__aad, aad, GMAC_AAD_LEN);
- sg_init_table(sg, 4);
- 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);
+ fc = (const __le16 *)aad;
+ if (ieee80211_is_beacon(*fc)) {
+ /* mask Timestamp field to zero */
+ sg_init_table(sg, 5);
+ sg_set_buf(&sg[0], __aad, GMAC_AAD_LEN);
+ sg_set_buf(&sg[1], zero, 8);
+ sg_set_buf(&sg[2], data + 8, data_len - 8 - GMAC_MIC_LEN);
+ sg_set_buf(&sg[3], zero, GMAC_MIC_LEN);
+ sg_set_buf(&sg[4], mic, GMAC_MIC_LEN);
+ } else {
+ sg_init_table(sg, 4);
+ 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);
+ }
memcpy(iv, nonce, GMAC_NONCE_LEN);
memset(iv + GMAC_NONCE_LEN, 0, sizeof(iv) - GMAC_NONCE_LEN);